Patent ID: 7893493
Filing Date: 2011-02-22
Classification: H01L

Abstract:
1. An intermediate hybrid surface orientation structure comprising: a silicon-on-insulator (SOI) substrate directly adhered to a bulk silicon substrate, the silicon of the SOI substrate having a different surface orientation than that of the bulk silicon substrate, wherein the SOI substrate includes a silicon within a buried silicon oxide (BOX) layer; and a reachthrough region extending through the SOI substrate to the bulk silicon substrate, the reachthrough region including a silicon nitride liner positioned directly over a silicon oxide liner, the silicon nitride liner distinct from the silicon oxide liner, and a silicon epitaxially grown from the bulk silicon substrate, the epitaxially grown silicon extending into an undercut into the silicon oxide liner under the silicon nitride liner, the undercut directly contacting a surface of the bulk silicon substrate, wherein the undercut includes a negatively sloped surface, wherein the epitaxially grown silicon is substantially stacking fault free.