Patent ID: 9066417
Filing Date: 2015-06-23
Classification: H05K,Y10T

Abstract:
1. A method for manufacturing a printed circuit board, comprising: providing a printed circuit board sheet comprising a printed circuit board unit and a unwanted portion, an imaginary boundary line being defined between the printed circuit board unit and the unwanted portion, the printed circuit board unit including a plurality of contact pads, each of the contact pads defining an outline, a nearest distance between the outline and the imaginary boundary line being less than 4 millimeters; punching the printed circuit board sheet along the imaginary boundary line, thereby forming one hollow portion or a plurality of through slots, with a plurality of burrs being generated on an inner surface of the hollow portion or the through slots during the punching process; and removing the burrs around the contact pads using a low-energy laser cutting process along the imaginary boundary line, thereby obtaining a printed circuit board, free of the burrs around the contact pads which has a nearest distance of less than 4 millimeters to the imaginary boundary line, a laser power used in the low-energy laser cutting process being 5-8 watts.