Patent ID: 7526146
Filing Date: 2009-04-28
Classification: G02F

Abstract:
1. An electro-optical modulator, comprising: a substrate; a first insulator layer, disposed on the substrate; an optical waveguide, disposed on the first insulator layer, and adapted for transmitting a light wave, comprising a first semiconductor layer, a second semiconductor layer, and a third semiconductor layer, wherein the first semiconductor layer is disposed on the first insulator layer, the second semiconductor layer is disposed on the first semiconductor layer, and the third semiconductor layer is disposed on the second semiconductor layer; a first doped semiconductor layer, disposed on the first insulator layer, and positioned at two opposite sides of the optical waveguide for electrically connecting the optical waveguide; a second insulator layer, disposed on the substrate for covering the first doped semiconductor layer; a second doped semiconductor layer, disposed on the second insulator layer, and positioned at one side of the third semiconductor layer for electrically connecting the third semiconductor layer; and a third insulator layer, disposed on the substrate for covering the second insulator layer, the optical waveguide, and the second doped semiconductor layer, wherein the second insulator layer and the third insulator layer comprise a plurality of contact windows for exposing the first doped semiconductor layer, and the second doped semiconductor layer.