Patent ID: 6545258
Filing Date: 2003-04-08
Classification: H01L

Abstract:
An integrated circuit having a photo-sensing element, the photo-sensing element comprising:(a) a first region formed within a substrate defining a horizontal substrate plane; and (b) a second region located within the first region, wherein: a cross-section of the photo-sensing element vertical to the substrate plane defines: (1) a set of interior side-wall interfaces between the first region and the second region; (2) a set of exterior side-wall interfaces between the first region and the substrate; and (3) a set of one or more horizontal interfaces between the first region and the substrate, such that a horizontal line can be drawn through the vertical cross-section that would cross a first exterior side-wall interface, followed by a first interior side-wall interface, followed by a second interior side-wall interface, followed by a second exterior side-wall interface; and the second region is contiguous with the substrate.