Patent ID: 8853695

Claim:
A substrate supporting thin film transistors thereon, comprising: said transistors each having a semiconductor layer and source-drain electrodes, said semiconductor layer comprising a single silicon layer including a transistor channel; said source-drain electrodes having a thin film of pure copper or copper alloy; a nitrogen-containing layer or an oxygen/nitrogen-containing layer comprising a plasma-reacted surface layer in silicon in the single silicon layer of the thin film transistor that has respectively part or all of its nitrogen or part or all of its oxygen or nitrogen connected to the silicon in said single silicon layer of said thin film transistor; and said thin film of pure copper or copper alloy connected with said single silicon layer of said thin film transistor only through said nitrogen-containing layer or oxygen/nitrogen-containing layer in said silicon in the single silicon layer of the thin film transistor, wherein the single silicon layer includes both 1) said channel, and 2) said nitrogen-containing layer or oxygen/nitrogen-containing layer comprising said plasma-reacted surface layer.