Patent ID: 6979631
Filing Date: 2005-12-27
Classification: H01L,Y10S

Abstract:
1. A method of forming semiconductor circuitry, comprising: providing a monocrystalline silicon substrate; forming a mask which covers a first portion of the substrate and leaves a second portion uncovered; forming a recess in the uncovered portion; at least partially filling the recess with a semiconductive material that comprises at least 1 atomic percent of an element other than silicon; removing the mask; forming a first semiconductor circuit component over the first portion of the substrate; forming a second semiconductor circuit component over the semiconductive material that at least partially fills the recess; wherein the substrate comprises a bulk monocrystalline silicon structure, an insulative material over the bulk monocrystalline silicon structure, and a monocrystalline silicon mass over the insulative material, and wherein the recess is formed through the monocrystalline silicon mass and to the insulative material, but does extend entirely through the insulative material.