Patent ID: 6049656
Filing Date: 2000-04-11
Classification: B23K,H05K,Y02P

Abstract:
A method of mounting an integrated circuit having a plurality of leads on a printed circuit board (PCB), comprising the steps of:removing foreign substances on said PCB;spreading a flux on lead patterns formed on said PCB;spreading a conductive bond over a part of said PCB where the semiconductor chip of said integrated circuit is positioned, said conductive bond being spread over the area corresponding to 60% of the area of said semiconductor chip;aligning the leads of said integrated circuit on the lead patterns on said PCB on which the flux is spread;soldering said leads and lead patterns by covering the part of a semiconductor chip of said aligned integrated circuit using a holding block and radiating an optical beam onto the whole surface thereof; andcooling said holding block and said PCB which has been soldered.