Patent ID: 7928509
Filing Date: 2011-04-19
Classification: H01L

Abstract:
1. An integrated device of a JFET and a Schottky diode, comprising: a substrate with a first conduction type; a first well region with a second conduction type in the substrate; a second well region with the first conduction type in the first well region; a first heavily doped region with the second conduction type in the first well region; and a second heavily doped region with the first conduction type in a second well region; wherein a depletion mode JFET is formed by the substrate, the first well region, and the second well region; wherein the first heavily doped region provides an ohmic contact for a source of the depletion mode JFET, and the second heavily doped region provides an ohmic contact for a gate of the depletion mode JFET; and wherein a drain of the depletion mode JFET is not provided with an ohmic contact and instead, the drain contact is a rectifying contact that forms a Schottky diode.