Patent ID: 7238583
Filing Date: 2007-07-03
Classification: H01L,Y02E

Abstract:
1. A method for fabricating a back-illuminated semiconductor imaging device, comprising the steps of: providing a substrate comprising: applying one or more dopants to the semiconductor substrate; growing an epitaxial layer on the semiconductor substrate while simultaneously causing diffusion of the one or more dopants into the epitaxial layer such that, at completion of the growing of the epitaxial layer, there exists a net dopant concentration profile in the semiconductor substrate and the epitaxial layer which has an initial maximum value at an interface of the semiconductor substrate and the insulator layer and which decreases monotonically with increasing distance from the interface within an initial portion of the semiconductor substrate and the epitaxial layer, and; fabricating one or more imaging components in the epitaxial layer such that, upon completion of the fabrication of the one or more imaging components, the net dopant concentration profile has a final maximum value at the interface of the semiconductor substrate and the insulator layer and decreases monotonically with increasing distance from the interface within a portion of the semiconductor substrate and the epitaxial layer.