Patent ID: 9059025
Filing Date: 2015-06-16
Classification: H01L,Y02E

Abstract:
1. A semiconductor chip having a photonics device and a CMOS device on the same semiconductor chip comprising: a photonics device portion and a CMOS device portion on a semiconductor chip; a metal or polysilicon gate on the CMOS device portion, the metal or polysilicon gate having a gate extension that extends away from the CMOS device portion and toward the photonics device portion; a germanium gate on the photonics device portion such that the germanium gate is coplanar with the metal or polysilicon gate, the germanium gate having a gate extension that extends away from the photonics device portion and toward the CMOS device portion, the germanium gate extension and metal or polysilicon gate extension joined together at a juncture to form a common gate wherein the juncture is not in contact with the photonics device portion and the juncture is not in contact with the CMOS device portion; spacers formed on the germanium gate and the metal or polysilicon gate; and nitride encapsulation formed on the germanium gate.