Patent ID: 7297612
Filing Date: 2007-11-20
Classification: H01L

Abstract:
1. A method for forming a structure, the method comprising: forming a first strained semiconductor layer over a first substrate to define a layer structure, the layer structure comprising a porous layer defining a cleave plane; forming a first relaxed layer over the first substrate; planarizing the first relaxed layer; forming a second relaxed layer over the first relaxed layer after the first relaxed layer is planarized; bonding the first strained semiconductor layer to an insulator layer disposed on a second substrate; and removing the first substrate from the first strained semiconductor layer by cleaving at the cleave plane, the strained semiconductor layer remaining bonded to the insulator layer, wherein the first relaxed layer includes the porous layer defining a cleave plane; and the first strained semiconductor layer is formed over the first and second relaxed layers.