Patent ID: 8368184

Claim:
A silicon device structure, comprising: a P doped n + type amorphous silicon film formed on a silicon semiconductor film, and a wiring formed on the P doped n + type amorphous silicon film, wherein the wiring is formed of a silicon oxide film which is formed on a surface of the P doped n + type amorphous silicon film and is also formed of a copper alloy film, and the copper alloy film has a composition containing Mn of 0.9 atom % or more and 5 atom % or less and P of 0.025 atom % or more and 0.3 atom % or less, wherein a copper alloy, being the sputtering target material, is formed by being melted and alloyed by a casting method, containing Mn of 1 atom % or more and 5 atom % or less and P of 0.05 atom % or more and 1.0 atom % or less.