Patent ID: 7205182
Filing Date: 2007-04-17
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, said method comprising the steps of: forming a semiconductor film over a first surface of a translucent substrate; forming an insulating film on the semiconductor film; forming a conductive film on the insulating film, the conductive film having tapered end portions; introducing an impurity into the semiconductor film to form low concentration impurity regions and high concentration impurity regions; wherein the low concentration impurity regions are overlapped with the tapered end portions of the conductive film; irradiating the semiconductor film with a first laser light from an upper portion of the semiconductor film over the first surface of the translucent substrate and with a second laser light from a second surface of the translucent substrate to activate the impurity, said second surface being opposite to the first surface, wherein the second laser light is a portion of the first laser light which is transmitted through the translucent substrate and reflected by a reflector; and wherein the reflector is formed adjacent to the second surface of the translucent substrate.