Patent ID: 7075165
Filing Date: 2006-07-11
Classification: G02B,H01L,Y02E

Abstract:
1. A detector comprising: a substrate having a top surface and a first trench formed therein; a first semiconductor layer conforming to an inside contour of the first trench and having an upper surface defining a second trench within the first trench, said first semiconductor layer having a first end that is substantially coplanar with the top surface of the substrate; a second semiconductor layer conforming to an inside contour of the second trench and having an upper surface defining a third trench within the second and first trenches; a third semiconductor layer filling the third trench and having a top side that is substantially coplanar with the top surface of the substrate; a first conductive material making an electrical contact to the first layer at the first end; and a second conductive material making electrical contact to the third layer on the top side of said third layer.