Patent ID: 6586325
Filing Date: 2003-07-01
Classification: H01L

Abstract:
A process for making an electronic device, the process comprising the steps of:preparing a substrate having an insulative planar surface; forming a metal film over said planar surface of said substrate; selectively masking said metal film with a first mask to define an unexposed area and a first exposed area on said metal film; non-porously anodizing said metal film to form a dense non-porous oxide layer on said first exposed area of said metal film; removing said first mask from said metal film; selectively masking said metal film and said dense non-porous oxide layer with a second mask to define a second exposed area on said dense non-porous oxide layer, said second exposed area being offset from said unexposed area on said metal film; porously anodizing said metal film and said dense non-porous oxide layer to convert said dense non-porous oxide layer and said metal film at said second exposed area into a porous oxide layer; and removing said second mask from said metal film and said dense non-porous oxide layer.