Abstract

Normally-on GaAs field-effect transistors (FETs) having 1 ?m gate lengths and 4 ?m channel lengths were fabricated in structures grown by molecular beam epitaxy (MBE). The unique part of this device is the very thin p+/n+ structure used to replace the conventional Schottky barriers. The device fabrication procedure is identical to that of a Schottky barrier FET (MESFET), but the devices exhibit characteristics similar to that of a junction field-effect transistor (JFET). This new device, the `camel diode gate FET?, is expected to have applications in both logic and power devices.

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