Patent ID: 8845842
Filing Date: 2014-09-30
Classification: H05K

Abstract:
1. A method for manufacturing a circuit board, the method comprising: obtaining an insulating substrate, liquid heat-curable adhesive, and electrically conductive particles, the electrically conductive particles being movable in the heat-curable adhesive under irradiation by mid-infrared light; adding the electrically conductive particles into the heat-curable adhesive; activating the electrically conductive particles in the heat-curable adhesive by electrical discharge; spreading the heat-curable adhesive having the activated electrically conductive particles on the insulating substrate to form a heat-curable adhesive layer on the insulating substrate; exposing the heat-curable adhesive layer to mid-infrared light by using a photo-mask, the photo-mask having a pattern corresponding to a desired circuit pattern of the circuit board, wherein the electrically conductive particles relocate themselves one by one to form the circuit pattern under the irradiation by the mid-infrared light; and hardening the heat-curable adhesive layer.