Patent ID: 9153645
Filing Date: 2015-10-06
Classification: H01L,H01S,Y02E

Abstract:
1. A method of forming a structure, the method comprising: providing a dielectric sidewall, on a substrate, with a height h, the substrate comprising a first crystalline semiconductor material and a top surface having a first crystal orientation, the dielectric sidewall defining an opening with a first width w exposing a portion of the substrate; defining, in the exposed portion of the substrate, a recess with a maximum depth d and a recessed surface comprising a second crystal orientation, the recessed surface defining a second width of the recess at the top surface of the substrate and defining a third width of the recess at a depth below the top surface of the substrate, the second width being greater than the third width; and forming, in the recess and adjoining the dielectric sidewall, a second crystalline semiconductor material having a lattice mismatch with the first crystalline semiconductor material, the lattice mismatch creating defects in the second crystalline semiconductor material, the defects terminating at a distance H above a deepest point of the recess, wherein H is less than or equal to h+d.