Patent ID: 6821848
Filing Date: 2004-11-23
Classification: G11C

Abstract:
A method for fabricating tunnel-junction structures, said method comprising the steps of:a) providing a substrate with an insulating surface; b) depositing and patterning a first metal layer on the insulating surface; c) depositing a second layer of dielectric over at least a portion of the patterned first metal layer; d) patterning and forming a first opening through said second layer of dielectric; e) forming a first oxide layer an said first metal layer; f) depositing a second metal layer over said first oxide layer, thus forming a first tunnel junction; g) depositing a third layer of dielectric over at least a portion of the second metal layer; h) patterning and forming a second opening through at least said third layer of dielectric; i) forming a second oxide layer on said second metal layer and depositing a third layer of metal, thus forming a second tunnel junction; and j) patterning said third layer of metal, whereby a third metallization layer pattern is formed for electrically coupling to said first and second tunnel junctions.