Patent ID: 7504277

Claim:
A method for fabricating a p-type/intrinsic/n-type (PIN) focal plane imaging sensor detector component comprising: fabricating a process wafer comprising an n-type first handle layer; an intrinsic active layer; and a buried oxide layer between the n-type first handle layer and the intrinsic active layer, wherein an exposed surface of the intrinsic active layer coincides with a first processing side of the process wafer; forming an N+ front side contact capture area and P+ detector circuitry in the intrinsic active layer on the first processing side of the process wafer and associated structures in a second oxide layer atop the intrinsic active layer of the process wafer; bonding a second handle wafer to the first processing side of the process wafer by bonding the second handle wafer to the second oxide layer atop the intrinsic active layer; removing the n-type first handle layer to expose the buried oxide layer, wherein the surface of the buried oxide layer exposed by removal of the n-type first handle layer coincides with a second processing side of the process wafer; forming a backside contact region on the second processing side of the process wafer, during which the buried oxide layer and a portion of the intrinsic active layer above the N+ front side contact capture area is removed thereby exposing a surface of the active intrinsic layer and a portion of the N+ front side capture area; implanting N+ species in the exposed surface of the active intrinsic layer to form an N+ region, whereby the N+ region forms an electrical contact with the N+ front side contact capture area; bonding a third handle wafer to the second processing side of the process wafer; removing the second handle wafer to expose the second oxide layer, wherein the surface of the second oxide layer exposed by removal of the second handle wafer coincides with the first processing side of the process wafer; and forming metal contacts on the first processing side of the process wafer with the N+ front side contact capture area, P+ detectors and associated structures.