Active solid-state devices (e.g. – transistors – solid-state diode – Field effect device – Junction field effect transistor
Reexamination Certificate
2008-05-13
2008-05-13
Rose, Kiesha L. (Department: 2822)
Active solid-state devices (e.g., transistors, solid-state diode
Field effect device
Junction field effect transistor
C257S077000, C257SE29243, C438S192000, C438S931000
Reexamination Certificate
active
07372087
ABSTRACT:
A structure for use in a static induction transistor includes a semiconductor body having first and second semiconductor layers on a substrate, with the second layer having a dopant concentration of around an order of magnitude higher than the dopant concentration of the first layer. A plurality of sources are located on the second layer. A plurality of gates are ion implanted in the second layer, an end one of the gates being connected to all of the plurality of gates and constituting a gate bus. The gate bus has an extension connecting the gate bus in the second layer of higher dopant concentration to the first layer of lower dopant concentration. The extension is ion implanted in either a series of steps or a sloping surface which is formed in the first and second layers.
REFERENCES:
patent: 5967795 (1999-10-01), Bakowsky et al.
patent: 6693308 (2004-02-01), Sankin et al.
Chen Li-Shu
Veliadis Victor
Andrews & Kurth LLP
Northrop Grumman Corporation
Patton Paul E
Rose Kiesha L.
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