Patent ID: 6956281
Filing Date: 2005-10-18
Classification: H01L,Y02P

Abstract:
1. A semiconductor device structure for performing an electrical function, comprising: a semiconductor substrate; a first region of a first conductivity type in the semiconductor substrate; a second region of a second conductivity type in the semiconductor substrate having a common border with the first region; a first layer of a first material over the substrate, the first layer having a first portion useful in performing the electrical function and a second portion over the border for shielding light from the common border, wherein the first layer has a first side and a second side opposite the first side; and a first field isolation region in the substrate; a second field isolation region in the substrate; a third field isolation region in the substrate and on the common border having a first side in the first region and a second side in the second region, wherein the third field isolation region is between the first field isolation region and the second field isolation region; a first dummy active region between the first field isolation region and the first side of the third field isolation region, wherein the first side of the first layer is over the first dummy active region; a second dummy active region between the second side of the third field isolation region and the second field isolation region.