Patent ID: 7540079

Claim:
A method for forming a circuit board comprising the step of: peeling a flexible film from a circuit board-use member which comprises the flexible film having a circuit pattern formed on one surface thereof, and a reinforcing plate having dimensional stability adhered to the opposite surface of the flexible film to said one surface with a removable organic layer interposed therebetween, wherein the flexible film is peeled away from the reinforcing plate while a peel angle is being maintained in the range of more than 0° to 80°; and wherein the reinforcing plate is an inorganic glass selected from the group consisting of soda-lime glass, borosilicate glass, and quartz glass; a ceramic selected from the group consisting of alumina, silicon nitride, and zirconia; a metal plate where the metal is selected from the group consisting of stainless steel, invar alloy and titanium; or a glass-fiber reinforced resin sheet.