Patent ID: 8614112
Filing Date: 2013-12-24
Classification: H01L

Abstract:
1. A method of fabricating a backside-illuminated pixel, the method comprising: forming frontside components of the pixel on or in a front side of a substrate, the frontside components including a photosensitive region of a first polarity; depositing a pure dopant layer of a second polarity on a back surface of the substrate; depositing a capping film on the back side of the pure dopant region; applying a laser pulse to melt the pure dopant layer, the capping film, and the back surface of the substrate; and recrystallizing the melted pure dopant layer, the melted capping film, and the melted backside of the substrate, wherein the recrystallized dopant layer, capping film and backside form a backside doped region of the substrate.