Patent ID: 7972903
Filing Date: 2011-07-05
Classification: H01L

Abstract:
1. A semiconductor device manufacturing method comprising: providing a semiconductor construct having a semiconductor substrate in which an external connection electrode is formed on one surface thereof; providing an insulating film covering a lower surface of the external connection electrode of the semiconductor construct, and a mask metal layer in which an opening having a planar size smaller than a planar size of the external connection electrode is formed to correspond to the external connection electrode, the mask metal layer being provided directly under the insulating film; using the mask metal layer as a mask to apply a laser beam to the insulating film via the opening, and thereby forming, in the insulating film, a connection opening reaching the external connection electrode; and forming a wiring line on the insulating film so that the wiring line is connected to the external connection electrode of the semiconductor construct via the connection opening of the insulating film and further to electrically connect an external solder ball.