Patent ID: 7102189

Claim:
A semiconductor device comprising: a tight contact layer disposed over a semiconductor substrate and made of one material selected from the group consisting of refractory metal, alloy of refractory metal, nitride of refractory metal, and siliconized nitride of refractory metal; an oxide surface layer disposed on a surface of the tight contact layer and made of oxide of material constituting the tight contact layer; a first conductive layer disposed on a surface of the oxide surface layer and made of a platinum group or alloy which contains a platinum group; a support layer disposed over the semiconductor substrate and made of insulating material; and a recess formed through the support layer, wherein: the tight contact layer is disposed on an inner surface of the recess; the first conductive layer has a first region covering the oxide surface layer and a second region being placed along a cylindrical virtual plane extending upward from a side plane of the recess to above the support layer and being continuous with the first region; and a thickness of the oxide surface layer is 1 to 5 nm.