Patent ID: 9059278
Filing Date: 2015-06-16
Classification: H01L

Abstract:
1. A semiconductor structure comprising: a semiconductor substrate having a top surface and a first type conductivity; a transistor on said substrate, said transistor comprising: a first isolation well positioned laterally around said transistor and having said second type conductivity; a second isolation well positioned laterally between said fourth intra-transistor well and said first isolation well, said second isolation well having said first type conductivity and extending vertically to said intra-transistor band; and, an isolation band in said substrate and having said second type conductivity, said isolation band being below said isolation well and said intra-transistor band such that said transistor is electrically isolated from a lower portion of said substrate, said intra-transistor band having a drain drift region between said third intra-transistor well and said isolation band.