Patent ID: 6380552
Filing Date: 2002-04-30
Classification: H01L

Abstract:
A Schottky diode comprising a cathode contact layer and a semiconductor Schottky layer adjacent a Schottky anode metallization,wherein said Schottky layer is a superlattice having a plurality of layer periods from a first layer period nearest the cathode contact layer to a last layer period nearest the anode metallization, each layer period having a thickness and including a sublayer of GaInAs having a thickness and a sublayer of AlInAs having a thickness, and each layer period having a proportion of GaInAs to AlInAs; and wherein the thickness of the sublayers is varied between adjacent layer periods such that the proportion of GaInAs to AlInAs varies stepwise between adjacent layer periods, and the thickness of AlInAs in said last layer period is less than 80% of the thickness of said last layer period.