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Transphorm, Inc. introduced three SuperGaN® FETs in TOLL packages with on-resistances of 35, 50, and 72 milliohms. Transphorm’s TOLL package configuration is industry standard, meaning the SuperGaN TOLL FETs can be used as drop-in replacements for any e-mode TOLL solution.
The new devices also offer Transphorm’s proven high voltage dynamic (switching) on-resistance reliability that is generally lacking in leading foundry-based e-mode GaN offerings. To sample the devices, visit Transphorm’s product page: https://www.transphormusa.com/en/products/.
The three surface mount devices (SMDs) support higher power applications operating within an average range of 1 to 3 kilowatts. These power systems are typically found in high performance segments such as computing (AI, server, telecom, data center), energy and industrial (PV inverters, servo motors), and other broad industrial markets which, collectively, have a current global GaN TAM of $2.5B. Notably, the FETs are optimal solutions for today’s rapidly expanding AI systems that rely on GPUs requiring 10 to 15 times the power of traditional CPUs.
Transphorm’s high power GaN devices are already widely supplied to leading customers who use them to power in-production high performance systems including datacenter power supplies, high power gaming PSUs, UPSes, and microinverters. These applications can also be supported by the TOLL devices as can electric-vehicle-based DC-to-DC converters and onboard chargers, with the underlying SuperGaN die already automotive (AEC-Q101) qualified.
The SuperGaN TOLL FETs represent the sixth package type offered by Transphorm, giving customers the widest selection of packages to meet their unique design requirements. As with all Transphorm products, the TOLL devices harness the inherent performance and reliability advantages made possible by the normally-off d-mode SuperGaN platform.
For a detailed competitive analysis between SuperGaN and e-mode GaN, download the company’s latest white paper titled The Fundamental Advantages of d-Mode GaN in Cascode Configuration. The white paper’s conclusion aligns with a head-to-head comparison released earlier this year showing the 72 milliohm SuperGaN FETs outperforming larger 50 milliohm e-mode devices in a commercially available 280 W gaming laptop charger.
SuperGaN devices lead the market with unmatched:
- Reliability at < 0.03 FIT
- Gate safety margin at ± 20 V
- Noise immunity at 4 V
- Temperature coefficient of resistance (TCR) at 20% lower than e-mode
- Drive flexibility with standard drivers and protection circuits readily available in silicon-based controllers/drivers
Device Specifications
The robust 650 V SuperGaN TOLL devices are JEDEC qualified. Because the normally-off d-mode platform pairs the GaN HEMT with a low voltage silicon MOSFET, the SuperGaN FETs are easy to drive with commonly used off-the-shelf gate drivers. They can be used in various hard- and soft-switching AC-to-DC, DC-to-DC, and DC-to-AC topologies to increase power density while reducing system size, weight, and overall cost.Part Dimensions (mm) RDS(on) (mΩ) typ RDS(on) (mΩ) max Vth (V) typ Id (25°C) (A) max TP65H035G4QS 10 x 12 35 41 4 46.5 TP65H050G4QS 10 x 12 50 60 4 34 TP65H070G4QS 10 x 12 72 85 4 29 Original – Transphorm
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Supplier of semiconductor epiwafers, SweGaN, recently began the transformation from start-up to scale-up. AFRY is assisting SweGaN’s scale-up journey with a wide variety of services to build a new state-of-the-art production facility in Linköping. A rapidly growing global sector, semiconductors – are key component within electric vehicles, solar inverters, power supplies and more – all contributing towards a more sustainable society.
AFRY’s cyber security experts are guiding SweGan in securing its IP (Immaterial Properties) and trade secrets and ensuring customer integrity. Additionally, AFRY is providing a bouquet of expert professional services including IT, OT, ERP, CE marking, construction of the new production facility, server room construction, electrical, security, work environment, quality assurance, risk management and project management.
“Initially, we asked AFRY to support and secure our cyber security operations. After understanding AFRY’s wide range of competencies and services, we determined it would be highly favourable to bring all professional services for the new facility under one roof. Partnering with AFRY, we can now focus SweGaN resources on our growth and expansion goals,” says Henrik Tölander, COO SweGaN.
“I am very proud that SweGaN chose us for this project. The client saw the value of one supplier for all their professional service needs. As SweGaN’s full service provider, we can gain a comprehensive, holistic overview of their needs and offer a customer-tailored solution,” says Michael Blom, Section Manager at AFRY.
The opening of the semiconductor production facility will enable Sweden, and in extension Europe, to strengthen the European supply chain and compete against Taiwan, China, the U.S, South Korea and Japan – currently the main providers of semiconductors. Increased access to robust semiconductor offerings in Europe will make it easier to develop and produce electric vehicles, solar inverters, and power supplies in Europe, while also reducing dependency on competing countries.
Original – AFRY
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Solitron Devices has acquired Micro Engineering Inc. located in Apopka, FL. Specializing in highly integrated, high reliability assemblies, Micro Engineering has over forty years of experience servicing medical, industrial, and aerospace applications.
Focused on low to mid volume production, Micro Engineering offers services from conceptual design and prototyping to full turnkey manufacturing and functionally tested assemblies. Additional services include hand assembly, wire harnessing, specialized coatings and full box builds.
Mark Matson, Solitron President & COO, said, “Micro Engineering is an exceptionally synergistic fit with Solitron, expanding and complimenting engineering and manufacturing capabilities. Solitron’s expertise with chip and wire, silicon carbide and high-density multi-chip modules combined with Micro Engineering’s PCBA, SMT and system level box build capability offers a strong suite of technology to customers.
This new capability for increased functionality and power density will accelerate introductions into emerging markets particularly utilizing Silicon Carbide (SiC) and Gallium Nitride (GaN). The combination of Solitron and Micro Engineering will also broaden both companies’ presence in medical, high end industrial and aerospace applications.”
Combined manufacturing capabilities now include 3D CAD modelling, 3D Printing, CAE machining, aluminum & gold wire bonding, void free soldering, fine pitch SMT for BGA’s, rigid, flex and double-sided circuit card assemblies; right up through full box builds. Product qualification infrastructure includes thermal shock, vibration, mechanical shock, centrifuge, salt spray atmosphere, burn-in and more. Micro engineering is ISO-9001 registered.
Original – Solitron Devices
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SEMICON Taiwan 2023 once again underscored Taiwan’s strategic importance in the global semiconductor industry. Entering its 28th year, the event was held in Taipei, gathering 950 exhibitors with 3,000 booths and attracting more than 62,000 visitors. The sheer scale of participation was evident in the hour-long traffic queues and bustling metro platforms as people flocked into the Exhibition Halls.
Innovations and sustainability were the focal points of this year’s show. Distinguished figures from the industry took the stage to emphasize the resilience of the semiconductor supply chain and envision a greener and more intelligent future enabled by semiconductors. Fueled by tremendous opportunities in artificial intelligence, communications, and automotive electronics, the semiconductor industry is poised to expand to a trillion-dollar market by the close of this decade despite the short-term cyclical downturns.
Reshaping Mobility with Power Semiconductors
This year, energy efficiency came to the forefront of innovations, especially among applications that have far-reaching impacts on the global economy, with electric vehicles being one.
Electrification and autonomous trends continue to drive up the semiconductor content per vehicle. Wide bandgap semiconductors like SiC and GaN have emerged as pivotal players, making substantial contributions to the performance and efficiency of next-generation electric vehicles.
It was exciting to see industry key players illustrate significant improvements achieved by new-generation semiconductors in terms of power efficiency, power density, and connectivity. Research firms estimate that silicon-based semiconductors will grow at a CAGR of 4% from 2022 to 2028, while SiC will grow at 31% and GaN at 49%, highlighting the growth potential of wide bandgap semiconductors.
More Data, More Computing Power, More Energy Consumption
The rapid adoption of artificial intelligence applications in every aspect of our lives presents a significant opportunity for the semiconductor industry. The recent breakthroughs in artificial intelligence, like generative AI, are made possible by the progress of semiconductor technologies, which were on full display at this year’s expo.
The computing power and the memory access required for AI applications are still growing at an unprecedented pace, and the energy consumption is proportional to the computing capability. More efficient energy conversion and distribution solutions are critical for data centers to accommodate increasing energy-intensive workloads.
Key takeaways Summary
- SEMICON Taiwan once again turned out to be an enlightening event, fostering the exchange of experiences and the dissemination of ingenious ideas.
- Energy efficiency challenges overall system performance as electronic devices become versatile and highly integrated. GaN power semiconductors are a low-cost and reliable solution to tackle power challenges for power-hungry applications.
- Technology advancement hinges on two significant investments: innovation and talent. We’re pleased to note these were repeatedly addressed in keynotes and presentations at this year’s event.
Original – GaN Systems
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GaN Systems announced the introduction of its groundbreaking 4th generation GaN power platform. This state-of-the-art technology sets a new power efficiency and compactness standard, delivering an impressive step-function performance boost and industry-leading figures of merit. For example, with GaN Systems Gen4 in an artificial intelligence (AI) server rack, 3.2kW power supplies at 100W/in3 in 2022 are now achieving 120W/in3 with efficiencies above Titanium levels. Gen4 will revolutionize power markets, including consumer electronics, data centers, solar energy, industrial applications, and automotive.
The Gen4 platform also delivers more total bill of material cost savings compared to traditional Silicon and Silicon Carbide solutions, making GaN Systems’ technology a powerful choice for businesses seeking to enhance their competitive advantage.
“Our lead customers have already realized the benefits of our Gen4 platform,” stated Jim Witham, CEO of GaN Systems. “This platform is a testament to our ongoing commitment to continuously delivering superior performance advantages and next-generation levels of efficiency. GaN Systems, in strategic collaboration with industry leaders like TSMC, has invested significantly to meet the ever-evolving demands of our customers. We are pioneering a transformation in product offerings, packaging innovations, enriched functionalities, and unparalleled performance across our markets.”
A Huge Leap for Power Electronics Technology
The Gen4 power platform boasts the following benefits:
- >20% improvement in input and output figures-of-merit translates into reduced losses, enhanced efficiency, and more cost-effective solutions.
- Increased granularity in device specification, combined with a wide range of packaging options, including PDFN, TOLL, TOLT, and Embedded – allowing the correct Rds resistance and package combination for each application, consequently optimizing electrical and thermal system performance.
- 700V E-mode with the industry’s highest transient voltage rating, 850V, significantly enhancing total system reliability and robustness. This rating enables the semiconductor components to withstand user environment anomalies, such as voltage spikes, ensuring uninterrupted and dependable performance.
- On-state resistance ranges enable power systems from 20W to 25,000W.
For more information, visit https://gansystems.com/gan-transistors/gen-4/
Original – GaN Systems
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Researchers at the Indian Institute of Science (IISc) have developed a fully indigenous gallium nitride (GaN) power switch that can have potential applications in systems like power converters for electric vehicles and laptops, as well as in wireless communications. The entire process of building the switch – from material growth to device fabrication to packaging – was developed in-house at the Centre for Nano Science and Engineering (CeNSE), IISc.
Due to their high performance and efficiency, GaN transistors are poised to replace traditional silicon-based transistors as the building blocks in many electronic devices, such as ultrafast chargers for electric vehicles, phones and laptops, as well as space and military applications such as radar.
“It is a very promising and disruptive technology,” says Digbijoy Nath, Associate Professor at CeNSE and corresponding author of the study published in Microelectronic Engineering. “But the material and devices are heavily import-restricted … We don’t have gallium nitride wafer production capability at commercial scale in India yet.” The know-how of manufacturing these devices is also a heavily-guarded secret with few studies published on the details of the processes involved, he adds.
Power switches are used to control the flow of power to – essentially turn on or off – electronic devices. To design the GaN power switch, the IISc team used a metal organic chemical vapour deposition technique developed and optimised over a decade by researchers in the lab of Srinivasan Raghavan, Professor and Chair, CeNSE. It involves growing GaN alloy crystals layer by layer on a two-inch silicon wafer to fabricate a multi-layered transistor.
The entire process needs to be carried out carefully in a clean room to ensure that no defects arise due to environmental conditions like humidity or temperature, which can affect device performance. The team also took the help of Kaushik Basu, Associate Professor in the Department of Electrical Engineering (EE), and his lab, to build an electrical circuit using these transistors and test their switching performance.
GaN transistors typically operate in what is called a “depletion mode” – they are on all the time unless a negative voltage is applied to turn them off. But power switches used in chargers and adapters need to work the other way around – they normally need to be off and not carrying current, and should only turn on when a positive voltage is applied (“enhancement mode”). To achieve this operation, the team combined the GaN transistor with a commercially available silicon transistor to keep the device normally off.
“The packaging of the device was also indigenously developed,” explains Rijo Baby, PhD student at CeNSE and first author of the study. After packaging and testing, the team found the device performance to be comparable to state-of-the-art switches available commercially, with a switching time of about 50 nanoseconds between on and off operations.
Going forward, the researchers plan on scaling up the device dimensions so that it can operate at high currents. They also plan to design a power converter that can step up or step down voltages.
“If you look at strategic organisations in India, they have a hard time procuring GaN transistors … It is impossible to import them beyond a certain quantity or power/frequency rating,” says Nath. “This is essentially a demonstration of indigenous GaN technology development.”
Original – Indian Institute of Science (IISc)
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Innoscience Technology has shipped more than 300 million pieces of its InnoGan gallium nitride chips as of August 2023, helping customers achieve small size, high energy efficiency, and low loss product design.
This is in response to phenomenal market demand across multiple sectors multiple applications in the consumer category – fast charging, mobile phones, LEDs – as well as automotive LIDAR, data centres, and renewable energy and energy storage systems, which has seen analysts such as TrendForce’s in its 2023 GaN Power Semiconductor Market Analysis Report, state that “the global GaN power device market will grow from US$180 million in 2022 to US$1.33 billion in 2026, with compound growth rate of 65%”.
In November 2017, Innoscience began the world’s first 8-inch GaN-on-Si mass production line, adopting the Integrated Device Manufacturer (IDM) whole industry chain model, and launched its first low-voltage GaN power device in May 2018. By June 2019, Innoscience’s 650V high-voltage GaN device had passed JEDEC approval, and subsequently, Innoscience has been the only semiconductor company in the world that simultaneously mass-produces high-voltage and low-voltage GaN.
Market acceptance of Innoscience’s high quality, high performance GaN devices has been swift. Following its 2019 entry into the fast charging market, Innoscience’s 650V parts have been adopted in 30W-120W designs by leading brands including ASUS, Anker, Nubia, Baseus, Greenlink, and Flash.
In 2020, Innoscience’s 100V low-voltage GaN was successfully used by Hesai in mass-production LIDAR designs, allowing lasers to achieve image transmission in a shorter time.
In March 2021, the Tencent×Nubia Red Magic mobile phone 6Pro was released. It comes equipped as standard with industry’s first 120W Black Rubik’s Cube GaN fast charge, which is based on Innoscience’s 650V chip. With the successive adoption by Oppo, Vivo, Lenovo and other manufacturers, it has become an industry trend for mobile phones to be equipped with GaN fast charging as standard.
March 2021 saw the mass-production of Innoscience’s bi-directional conduction chip V-GaN officially begin; this device is the only GaN chip in the world that can be applied to high-voltage side load switches, smartphone USB/wireless charging ports with built-in OVP protection, multi-power supply system switch circuits, and other scenarios:one V-GaN replaces two Si MOSFETs in load switching applications resulting in a smaller and more efficient solution.
In October of the same year, Innoscience scored another industry first, as OPPO used the company’s self-developed bi-directional conduction VGaN IC as the internal power switch in its latest smart phone. Other mobile phone makers such as Realme, OnePlus, Lenovo, and Motorola have also successively adopted VGaN for charging protection.
In May 2022, Shounuo released the world’s smallest 45W/65W PD car charger, using Innoscience’s 40V low-voltage INN040FQ043A.
Then in July, Anker and Innoscience jointly released the world’s first 65W full-GaN fast charger. This design uses GaN power chips at both the AC and DC ends for the first time, taking system power density and efficiency to a whole new level.
Later, in October 2022, Innoscience achieved mass production of GaN products targeting industrial power supplies – again an industry first – comprehensively improving energy conversion efficiency and reducing system energy consumption.
In November 2022, Innoscience’s INN100W032A won the IIC World Electronics Achievement Award. The gate charge of this product is only 20% of a traditional silicon MOSFET, and its Ciss is only 40% of its silicon counterpart. It can be widely applied in motor drive, Class D, data centre, motor-driver, communication base station and other product fields. In January 2023, Innoscience launched the SolidGaN ISG3201, a 100V highly-integrated half-bridge drive packaged solution, further improving the overall system performance of 48V power supply of data centre module power supplies, motor drives, class D power amplifiers, photovoltaic inverters and light hybrid electric vehicles.
The move to GaN as the premium power semiconductor technology is driven both by new GaN products and market demands. As an example, in April this year, Innoscience’s IATF 16949 automotive-grade low-voltage parts successfully expanded from industrial to automotive applications, with use in autonomous vehicle LIDAR systems.
Then in July 2023, Innoscience began to apply GaN in the field of renewable energy, reducing the size and improving the efficiency of photovoltaic modules.
By the end of August 2023, Innoscience had successfully mass-produced 54 different types of high-voltage GaN chips (650V-700V) and 20 types of medium-low voltage GaN chips (30V-150V). Products span three chip categories: wafers, discrete devices and integrated solutions.
Commented Dr Denis Marcon, Innoscience’s General Manager, Europe: “We are just at the start of the GaN story. The first applications were all in consumer, but GaN is undoubtedly the key to reducing costs and increasing efficiency in the industrial field as well. And according to automotive industry forecasts, GaN may enter automotive market already this year penetrating applications such as low-power OBC and DC-DC applications in 2025.
With such rapid growth in market demand, the reliability of devices, price competitiveness and stable supply in large quantities are now the major concerns of users. Based on an advanced Innoscience’s 8-inch GaN-on-Si IDM manufacturing platform, Innoscience’s current production capacity has reached 15,000 wafers per month, providing tremendous advantages in scale, reliability and cost.”
Original – Innoscience Technology
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IQE plc, the leading supplier of compound semiconductor wafer products and advanced material solutions to the global semiconductor industry, announced a strategic collaboration with VisIC Technologies, a global leader in the provision of GaN (Gallium Nitride) power solutions to the automotive sector, to develop the highest reliability gallium nitride D-Mode (D-Mode GaN) power products for use in electric vehicles inverters.
IQE and VisIC Technologies will collaborate to develop 200mm (8”) D-Mode GaN power epiwafers that will be developed at IQE’s UK facilities, leveraging IQE’s well-established expertise in GaN technology.
VisIC Technologies, with its ground-breaking D3GaN technology (Direct Drive D-Mode GaN), brings the future of EV inverters into focus. This technology promises to reduce power consumption, increase reliability and enhance performance in electric vehicles. By combining VisIC Technologies’ innovative Power Electronics solutions with IQE’s epitaxy excellence, this partnership aims to accelerate the adoption of GaN-on-Silicon technology in EVs, significantly contributing to the evolution of sustainable transportation.
The collaboration marks another important milestone in IQE’s strategy of diversification into the high-growth Power market, first announced at its 2022 Capital Markets Day. IQE sees significant opportunities in the GaN Power epiwafer market in particular, which is forecast to reach a $632m value by 2027.
Original – VisIC Technologies
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Navitas Semiconductor announced the world-wide launch of GaNSafe™, a new, high-performance wide bandgap power platform at a special customer, partner and press event in Taiwan. Navitas has optimized its 4th-generation gallium nitride technology for demanding, high-power applications in data centers, solar / energy storage and EV markets, where efficiency, power density and robust & reliable operation are critical.
At the worldwide launch event at the Marriot Taipei, Navitas’ David Carroll, Sr. VP Worldwide Sales, and Charles Bailley, Sr. Director Business Development will introduce Navitas and the new GaNSafe platform to an invited VIP audience of over 50 high-ranking customer attendees, plus industry partners and international media.
The new 4th-generation GaN power ICs are manufactured in Hsinchu, by long-term Navitas partner TSMC. Navitas is grateful to Dr. RY Su, Manager of GaN Power Technology at TSMC, who will make a special presentation on the future of GaN at the GaNSafe launch.
Navitas’ GaNFast™ power ICs integrate gallium nitride (GaN) power and drive, with control, sensing, and protection to enable faster charging, higher power density, and greater energy savings, with over 100,000,000 units shipped, and an industry-first 20-year warranty. Now, the new GaNSafe platformhas been engineered with additional, application-specific protection features, functions and new, high-power packaging to deliver enabling performance under grueling high-temperature, long-duration conditions.
The initial, high-power 650/800 V GaNSafe portfolio covers a range of RDS(ON) from 35 to 98 mΩ in a novel, robust, and cool-running surface-mount TOLL package, to address applications from 1,000 to 22,000 W. GaNSafe integrated features and functions include:
- Protected, regulated, integrated gate-drive control, with zero gate-source loop inductance for reliable high-speed 2 MHz switching capability to maximize application power density.
- High-speed short-circuit protection, with autonomous ‘detect and protect’ within 50 ns – 4x faster than competing discrete solutions.
- Electrostatic discharge (ESD) protection of 2 kV, compared to zero for discrete GaN transistors.
- 650 V continuous, and 800 V transient voltage capability to aid survival during extraordinary application conditions.
- Easy-to-use, complete, high-power, high-reliability, high-performance power IC with only 4 pins, to accelerate customer designs.
- Programmable turn-on and turn-off speeds (dV/dt) to simplify EMI regulatory requirements.
Unlike discrete GaN transistor designs, with voltage spikes, undershoot and specification breaches, GaNSafe delivers an efficient, predictable, reliable system. GaNSafe’s robust 4-pin TOLL package has achieved the tough IPC-9701 mechanical reliability standard, and delivers simple, strong, dependable performance as compared to multi-chip modules which require 3x as many connections, and have poor cooling capability.
Navitas’ market-specific system design centers offer complete platform designs with benchmark efficiency, density and system cost using GaNSafe products to accelerate customer time-to-revenue and maximize chance of first-time-right designs. These system platforms include complete design collateral with fully-tested hardware, embedded software, schematics, bill-of-materials, layout, simulation and hardware test results. Examples of system platforms enabled by GaNSafe technology include:
- Navitas’ CRPS185 data center power platform, that delivers a full 3,200 W of power in only 1U (40 mm) x 73.5mm x 185 mm (544 cc), achieving 5.9 W/cc, or almost 100 W/in3 power density. This is a 40% size reduction vs, the equivalent legacy silicon approach and reaches over 96.5% efficiency at 30% load, and over 96% stretching from 20% to 60% load, creating a ‘Titanium Plus’ benchmark.
- Navitas’ 6.6 kW 3-in-1 bi-directional EV on-board charger (OBC) with 3 kW DC-DC. This 96%+ efficient unit has over 50% higher power density, and with efficiency over 95%, delivers up to 16% energy savings as compared to competing solutions.
“Our original GaNFast and GaNSense technologies have set the industry standard for mobile charging, establishing the first market with high-volume, mainstream GaN adoption to displace silicon,” said Gene Sheridan, CEO and co-founder. “GaNSafe takes our technology to the next level, as the most protected, reliable and safe GaN devices in the industry, and now also targeting 1-22 kW power systems in AI-based data centers, EV, solar and energy storage systems. Customers can now achieve the full potential of GaN in these multi-billion dollar markets demanding the highest efficiency, density and reliability.”
The GaNSafe portfolio is available immediately to qualified customers with mass production expected to begin in Q4 2023. 40 customer projects are already in progress with GaNSafe in data center, solar, energy storage and EV applications, contributing to Navitas’ $1 billion customer pipeline.
Original – Navitas Semiconductor
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Shin-Etsu Chemical Co., Ltd. has determined that QST® (Qromis Substrate Technology) substrate is an essential material for the social implementation of high-performance, energy-efficient GaN (gallium nitride) power devices, and the company will promote the development and launching on the market of these products.
Since QST® substrate is designed to have the same coefficient of thermal expansion (CTE) as GaN, it enables suppression of warpage and cracking of the GaN epitaxial layer and resultant large-diameter, high-quality thick GaN epitaxial growth. Taking advantage of these characteristics, it is expected to be applied to power devices and RF devices (5G and beyond 5G), which have been rapidly growing in recent years, as well as in such areas as MicroLED growth for MicroLED displays.
In addition to sales of QST® substrates, Shin-Etsu Chemical will also sell GaN grown QST® substrates upon customer request. We currently have a line-up of 6″ and 8″ diameter substrates, and we are working on 12″ diameter substrates. Since 2021, for each respective application for power devices, RF devices and LEDs, sample evaluation and device development are continuing with numerous customers in Japan and globally. Especially for power devices, continuous evaluation is underway for devices in the wide range of 650V to 1800V.
So far, Shin-Etsu Chemical has repeatedly made many improvements with regard to its QST® substrates. One example is the significant improvement in lowering defects originating from the bonding process, which has enabled the supply of high-quality QST® substrates. In addition, for the thicker GaN films that many of our customers have requested, we have promoted the provision of template substrates with optimized buffer layers, which enables our customers to realize stable epitaxial growth of more than 10 μm thickness. Furthermore, various successful results have been produced and reported on, including the achievement of thick-film GaN growth exceeding 20 μm using QST® substrates and the achievement of 1800V breakdown voltage in power devices.
Moreover, Shin-Etsu Chemical and Oki Electric Industry Co., Ltd. have jointly succeeded in developing a technology to exfoliate GaN from QST® substrates and bond it to substrates made of different materials using Crystal Film Bonding (CFB) technology. Until now, most GaN power devices have been lateral devices, but CFB technology takes advantage of the characteristics of QST® substrates to realize vertical power devices that can control large currents by exfoliating a thick layer of high-quality GaN from an insulating QST® substrate (see figure below).
To customers who manufacture GaN devices, Shin-Etsu Chemical will provide QST® substrates or GaN grown QST® substrates and Oki Electric Industry will provide its CFB technology through partnering or licensing. In this way, the two companies hope to contribute to the advancement of vertical power devices.
Based on these development results and also based on business situation inquiries from customers, Shin-Etsu Chemical will continue to increase production to meet customer demand.
Shin-Etsu Chemical will contribute to the realization of a sustainable society that can use energy efficiently by further promoting the social implementation of GaN devices that have characteristics that are absolutely essential for the future society.
Original – Shin-Etsu Chemical
