Patent ID: 6548878
Filing Date: 2003-04-15
Classification: H01L,H04B,Y02E

Abstract:
A method for fabricating a distributed PN photodiode, the method comprising the steps of:providing a first semiconductor substrate doped with a first dopant type, the first semiconductor substrate having first and second planar surfaces; bonding a first surface of a second semiconductor substrate to the first planar surface of the first semiconductor substrate; lapping the second planar surface of the first semiconductor substrate; selectively masking and diffusing a predetermined portion of the second planar surface of the first semiconductor substrate with a second dopant type to form a plurality of active regions: forming a first oxide layer on the second planar surface of the first semiconductor substrate; selectively masking and etching the first oxide layer to form a plurality of contact holes in the first oxide layer, where each contact hole is formed in communication with one of the plurality of active regions; and forming a contact that interconnects each of the plurality of contact holes.