Free tools Windows power users keep installed
One-click scans. No signup required.
In 2005, Soitec reported using its Smart Cut wafer-splitting process to transfer a thin, single-crystal gallium nitride (GaN) layer onto an insulating layer over a GaN carrier wafer. The demonstration showed how the active GaN film could be separated from the support beneath it; it did not disclose the wafer diameter or establish a commercial product.
How Smart Cut transfers a GaN layer
Smart Cut combines light-ion implantation with wafer bonding. The process creates a weakened plane inside a GaN donor wafer, bonds that donor to a handle wafer, then splits the donor at the weakened plane. The thin film left on the handle retains the donor material’s single-crystal orientation.
- Implant the donor: Light ions are implanted into the GaN donor to define a buried, weakened plane.
- Bond the wafers: The donor is attached to the handle wafer through molecular-adhesion bonding.
- Split and transfer: The donor separates along the weakened plane, leaving a thin GaN layer on the handle.
Soitec developed the 2005 work with Picogiga International, its compound-semiconductor subsidiary, in a technology-development program with CEA-Leti. The resulting stack was GaN over an insulating layer over a GaN carrier. The report did not state the wafer diameter.
Why place GaN over an insulator and a carrier?
In conventional GaN epitaxy, the semiconductor layers are grown on a bulk substrate such as silicon, silicon carbide (SiC), or sapphire. With a transferred film, the active GaN surface and its support can be engineered more independently. In principle, that lets designers select the handle and bonding interface to suit requirements such as heat spreading, electrical isolation, mechanical support, or compatibility with a fabrication process, while retaining a GaN surface for device fabrication.
The Tool Desk
Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
That flexibility is an implication of the layer-transfer architecture, not a measured performance result from the 2005 demonstration. The available account does not establish that the structure improved device efficiency, thermal performance, yield, or cost.
How the work developed after 2005
Four- and six-inch engineered GaN wafers
In 2012, Soitec and Sumitomo Electric announced demonstrations of four-inch and six-inch engineered GaN substrates. Sumitomo supplied bulk free-standing GaN in Japan, and Soitec applied Smart Cut in France to make the engineered wafers. The companies described the substrates as having low defect density and a path to lower cost than bulk GaN; those are partner claims, not independent test results.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
SmartGaN development
Soitec’s 2023 SmartGaN material described a 200 mm wafer architecture: an optimized GaN epitaxial stack above a transferred GaN seed layer, supported by a customized silicon or non-silicon handle wafer. The bonding interface can be selected for electrical isolation or conduction. The company identifies RF and power devices as target applications.
- RF: Soitec lists 5G infrastructure, small cells, and handsets as targets. Its 2024 registration document describes the intended benefit as smaller, more efficient high-power components.
- Power: The company says SmartGaN is intended to support thicker GaN layers while reducing the risk of substrate breakage during thermal cycles. It presents the technology as a route toward circuits above 1,200 V, not as evidence that such devices are already in production.
Soitec’s 2024 results presentation forecast pilot production in 2027 for 1,200 V lateral SmartGaN applications and showed an RF roadmap for 5G/6G power amplifiers. The date is a company expectation, not confirmation that pilot production has begun, and the roadmap may change.
Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
What became of the original GaN-on-insulator demonstration?
The 2005 GaN-on-insulator report established a wafer-transfer demonstration, but it is not the same thing as today’s SmartGaN development. The later work uses related layer-transfer ideas in engineered GaN substrates and, in SmartGaN, combines a transferred GaN seed layer with an optimized epitaxial stack and a customizable handle wafer.
Soitec’s 2024 registration document describes current GaN-on-SiC and GaN-on-Si epitaxial-wafer lines and notes that the company presented SmartGaN development in 2023. This supports a continuing GaN substrate and development effort, but does not establish commercial availability, production volume, independent device performance, or the final outcome of the 2005 GaN-on-insulator structure itself.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
What to compare when evaluating GaN substrate approaches
A substrate choice depends on the device and manufacturing requirements; the 2005 transfer demonstration alone does not show that an engineered wafer is preferable in every case. Compare options across these factors:
- Support material: silicon, SiC, sapphire, or an engineered handle wafer.
- Thermal and electrical behavior: heat-spreading needs, electrical isolation, and whether conduction through the bonding interface is desired.
- GaN layer quality: the quality of a transferred single-crystal layer and the quality of the epitaxial growth must both be considered.
- Wafer size and fab compatibility: SmartGaN is specified at 200 mm; Soitec describes CMOS-fab compatibility for the material.
- Device target: RF power amplifiers for 5G/6G and power devices have different requirements.
- Manufacturing maturity and cost: assess production status, wafer supply, yield, donor-wafer reuse, and demonstrated—not merely projected—cost.
At the time of the 2005 report, Picogiga International chief operating officer Jean-Luc Ledys described the effort as part of a broader strategy: “This GaN capability is a part of our roadmap strategy to develop and supply advanced engineered substrates for compound semiconductors for a variety of applications.”
Quick Recap
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
