Fujitsu Technology Enables Boost to Radar Performance


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Future Plans

Fujitsu and Fujitsu Laboratories plan to assess the thermal resistance and output performance of GaN-HEMT power amps that use this technology, and aim to implement it in high-output, high-frequency GaN-HEMT power amps in fiscal 2020, with use in applications for weather radars and 5G wireless communications systems.

(1) Silicon Carbide (SiC)

A material with relatively good thermal conductivity, about 420 watts per meter per kelvin (W/mK), used for substrates on which GaN-HEMT crystals are grown.

(2) Gallium nitride (GaN)

A wide band-gap semiconductor material that operates with a higher breakdown-voltage than semiconductor technologies based on previous materials, such as silicon (Si)- or gallium-arsenide (GaAs)-based technologies.

(3) High electron mobility transistor (HEMT)

A field-effect transistor that takes advantage of operation of the electron layer at the boundary between semiconductor materials with different bandgaps, which is relatively rapid compared to that within conventional semiconductors. Invented in 1980 by Fujitsu, this technology is currently used in a number of IT applications, including satellite transceivers, cellular equipment, GPS-based navigation systems, and broadband wireless networking systems.

(4) Room-temperature bonding

A technology in which surfaces of different materials are cleaned in a vacuum by an argon beam and bonded at room temperature. Also known as surface activated bonding. This can bond materials that have different coefficients of thermal expansion.

(5) Thermal resistance reduced to 61%

Equivalent to an 80degC reduction in surface temperature in a 200-W class device.

About Fujitsu Laboratories

Founded in 1968 as a wholly owned subsidiary of Fujitsu Limited, Fujitsu Laboratories Ltd. is one of the premier research centers in the world. With a global network of laboratories in Japan, China, the United States and Europe, the organization conducts a wide range of basic and applied research in the areas of Next-generation Services, Computer Servers, Networks, Electronic Devices and Advanced Materials. 

About Fujitsu Ltd

Fujitsu is the leading Japanese information and communication technology (ICT) company, offering a full range of technology products, solutions, and services. Approximately 155,000 Fujitsu people support customers in more than 100 countries. We use our experience and the power of ICT to shape the future of society with our customers. Fujitsu Limited (TSE: 6702) reported consolidated revenues of 4.5 trillion yen (US$40 billion) for the fiscal year ended March 31, 2017.

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