Patent ID: 7067342
Filing Date: 2006-06-27
Classification: H01L

Abstract:
1. A method for integrating an optical device and an electronic device on a semiconductor substrate, comprising: providing a semiconductor substrate having an active semiconductor layer; forming openings within the active semiconductor layer in a first region of the semiconductor substrate and openings within the active semiconductor layer in a second region of the semiconductor substrate, wherein the first region corresponds to an optical device portion of the semiconductor substrate and the second region corresponds to an electronic device portion of the semiconductor substrate; forming optical liners on sidewalls within the openings of the active semiconductor layer in the optical device portion of the semiconductor substrate; forming trench liners on sidewalls within the openings of the active semiconductor layer in the electronic device portion of the semiconductor substrate, wherein forming the optical liners in the openings of the active semiconductor layer in the optical device portion of the semiconductor substrate and forming the trench liners in the openings of the active semiconductor layer in the electronic device portion of the semiconductor substrate comprises one of: (i) simultaneously forming the optical liners and the trench liners, or (ii) independently forming the optical liners in the optical device portion from the trench liners in the electronic device portion; filling the openings of the active semiconductor layer in the optical device portion of the semiconductor substrate and the openings of the active semiconductor layer in the electronic device portion of the semiconductor substrate with a fill material; forming at least a portion of an electronic device on the active semiconductor layer within the electronic device portion of the semiconductor substrate; forming a salicide blocking layer overlying the optical device portion of the semiconductor substrate; saliciding the electronic device portion of the semiconductor substrate, wherein the salicide blocking layer prevents salicidation of the active semiconductor layer within the optical device portion of the semiconductor substrate; and forming an interlevel dielectric layer overlying the optical device portion and the electronic device portion of the semiconductor substrate, wherein the interlevel dielectric can act as an upper cladding layer of an optical device formed within the optical device portion of the semiconductor substrate.