Patent ID: 7119401
Filing Date: 2006-10-10
Classification: H01L

Abstract:
1. A diode structure, comprising: a substrate layer comprising a semiconductor material and first doping impurities with a first doping polarity; a first layer having an opening, the first layer being on top of and in direct physical contact with the substrate layer, the first layer consisting of only one piece of continuously distributed semiconductor material and second doping impurities with a second doping polarity, the second doping polarity being opposite to the first doping polarity; a second layer being on top of and in direct physical contact with the first layer, the second layer comprising the semiconductor material and third doping impurities with the second doping polarity, the first layer having a higher doping concentration than the second layer, wherein the second layer is in direct physical contact with the substrate layer through the opening of the first layer; and an electrode structure being on top of and in direct physical contact with the second layer, the electrode structure including at least an anode and a cathode of the diode structure, wherein both the anode and the cathode are (i) in direct physical contact with the second layer and (ii) not in direct physical contact with the first layer.