Patent ID: 8076220
Filing Date: 2011-12-13
Classification: H01L

Abstract:
1. A method of fabricating a semiconductor integrated circuit chip comprising: preparing a wafer including a dielectric substrate that is transparent to light and having a front surface and a back surface, a first film formed on the back surface of the dielectric substrate, a second film formed on the first film, a third film formed on the second film, and a fourth film formed on the front surface, the second film having a lower refractive index than the first and third films; forming circuitry in and on the fourth film, and dicing the wafer into chips; and illuminating the third film by sensing light for detection of the wafer, during said forming, wherein the first, second and third films are formed to cover only selected parts of the dielectric substrate, so that the chips produced by the dicing do not include the first, second and third films.