Patent ID: 6507084
Filing Date: 2003-01-14
Classification: H01L,Y02E

Abstract:
A planar semiconductor light-receiving element, comprising:a substrate; a first impurity diffused region provided in the substrate, a first electrode provided on a bottom surface of the substrate, a second electrode provided on the first impurity diffused region, a second impurity diffused region provided in the substrate so as to surround the first impurity diffused region, with leaving a certain space therebetween; and a third electrode provided on the second impurity diffused region, wherein a reverse bias is applied through the third electrode to a PN junction formed by the substrate and the second impurity diffused region, thereby causing carriers present outside the first impurity diffused region to recombine subject to a drift current, the carriers being generated by light impinging upon a top surface of the planar semiconductor light-receiving element.