Patent ID: 6337514
Filing Date: 2002-01-08
Classification: H01L,Y10S

Abstract:
A semiconductor integrated circuit device comprising:at least one circuit component having a boundary where surface states take place; an inter-level insulating layer covering said at least one circuit component, and formed of a first material permeable to a chemical species used for reduction of said surface states; and an obstacle layer formed on said inter-level insulating layer over said boundary, formed of a second material less permeable to said chemical species, and having at least one opening providing a passage to said chemical species together with an exposed surface of said inter-level insulating layer outside of an outer periphery of said obstacle and making said boundary spaced from said passage by a distance equal to or less than a critical distance measured in a direction parallel to said obstacle and determined on the basis of a diffusion length of said chemical species under predetermined diffusing conditions, in which said first material, said second material and said chemical species are silicon oxide, polysilicon and hydrogen, and said at least one circuit component is a field effect transistor having said boundary between a channel region and a gate insulating layer.