Patent ID: 7259444

Claim:
An optoelectronic device comprising a pin photo diode, the pin photo diode comprising: a) a patterned implant region within one of: (1) a semi-insulating substrate; or (2) a semi-insulating layer, the patterned implant region comprising a first dopant type; b) an upper layer comprising semiconductor material having a second dopant type; c) an intermediate layer comprising a substantially intrinsic semiconductor material between the implant region and the upper layer; d) an upper layer contact comprising a portion having a generally circular interior facing edge; and e) the patterned implant region comprising: (i) a first portion having an outer periphery such that the outer periphery substantially is not beyond the generally circular interior facing edge; (ii) a contact portion located beyond the upper layer contact; and (iii) a connecting portion coupling the first portion and the contact portion of the patterned implant region.