Patent ID: 9053961
Filing Date: 2015-06-09
Classification: H01L

Abstract:
1. A semiconductor device comprising: a multilayer interconnect layer having a first interconnect layer and a second interconnect layer positioned over the first interconnect layer; and a first transistor and a second transistor formed by using the first interconnect layer, wherein the first transistor includes: a first gate electrode buried in the first interconnect layer; a first gate insulating film positioned over the first gate electrode; a first semiconductor layer positioned over the first gate insulating film; and an insulating cover film positioned below the second interconnect layer and covering the upper surface and the lateral side of the first semiconductor layer, and wherein the second transistor includes: a second gate electrode buried in the first interconnect layer; a second gate insulating film positioned over the second gate electrode; and a second semiconductor layer positioned over the second gate insulating film, positioned at least partially above the insulating cover film and formed of a material different from that of the first semiconductor layer.