Patent ID: 7501303

Claim:
A method for fabricating a silicon photodetector assembly adapted for at least one frequency of light comprising the steps of: providing a first body of silicon having a layer of silicon dioxide on a surface thereof; providing a second body of silicon; implanting hydrogen atoms at a predetermined depth in said silicon surface forming a boundary between hydrogen implanted silicon and unimplanted silicon; bonding a silicon surface of said second body to the silicon dioxide layer of the first body; separating the hydrogen implanted silicon from silicon not hydrogen implanted at said boundary thereby exposing a separated surface; providing a further body of silicon having a layer of silicon dioxide thereon; implanting hydrogen atoms at a predetermined depth in said further body forming a boundary between hydrogen implanted silicon and unimplanted silicon; bonding the silicon dioxide layer of said further body to said exposed silicon surface; separating the hydrogen implanted silicon from silicon not hydrogen implanted at said boundary of said further body thereby exposing a separated surface thereof; doping said further body near the separated surface to create a first semiconducting region of one of p and n types; providing a silicon layer on the separated surface of said further body to form a cavity for light coupled into the silicon layer from a light admitting surface thereof; and doping said silicon layer near the light admitting surface to create a second semiconducting region of type opposite to the type of said first semiconducting region.