Patent ID: 7200927

Claim:
A method of producing a wiring transfer sheet comprising a carrier base and a wiring layer formed on a surface of the carrier base, the method comprising: pressing a sheet of wiring material having a first rough surface against a surface of the carrier base such that: the first rough surface is in contact with the surface of the carrier base during said pressing; the sheet of wiring material is positioned on the surface of the carrier base by said pressing so as to be capable of being separated from the surface of the carrier base; and the surface of the carrier base is formed into a second rough surface complementary to the first rough surface of the sheet of wiring material due to pressure from the first rough surface against the surface of the carrier base; forming a wiring layer with a predetermined wiring nattem on the surface of the carrier base by etching the sheet of wiring material; and subjecting the surface of the carrier base to a releasing treatment before said pressing of the sheet of wiring material against the surface of the carrier base.