Patent ID: 7719091
Filing Date: 2010-05-18
Classification: H01L,Y02E

Abstract:
1. A diode comprising: a first region of a first polarity type, wherein said first region is one of an anode and a cathode of said diode; a second region of a second polarity type beneath, larger than, and substantially surrounding said first region wherein said second region is the other of said anode and said cathode of said diode, a junction between said first region and said second region forming a diode junction; an intrinsic region separating said first region from said second region, said diode junction further comprising said intrinsic region; a generally annular metal contact coupled to said second region, said generally annular metal contact at least partially encircling said first region in the form of an annulus having a gap in said annulus, wherein (i) said second region comprises a plurality of contact holes below said generally annular metal contact, (ii) said plurality of contact holes comprise less than the entire surface area of said second region under said generally annular metal contact, and (iii) said generally annular metal contact makes conductive contact with said second region only through said plurality of contact holes; and a metal contact coupled to said first region; wherein said metal contacts are coplanar.