Patent ID: 7435352

Claim:
A method for forming a solder resist pattern comprising the steps of: pre-treating both sides of a double-sided printed circuit board to produce first and second pre-treated sides on first and second sides of the printed circuit board, wherein pre-treating includes scrubbing; laminating a semi-cured thermosetting film on the first and second pre-treated sides of the printed circuit board to produce first and second semi-cured films on the first and second sides of the printed circuit board, wherein the thermosetting film is the outermost surface of the printed circuit board; and irradiating a laser beam to the first and second semi-cured films according to a solder resist mask pattern to selectively remove the first and second films to expose circuit patterns to be brazed and leaving the thermosetting film as a solder resist mask over areas other than the circuit patterns to be brazed, the solder resist mask pattern having been previously designed prior to irradiating.