Patent ID: 7309628
Filing Date: 2007-12-18
Classification: G02B,H01L

Abstract:
1. A method for making a semiconductor device, comprising: providing a semiconductor substrate having an active semiconductor layer; forming a semiconductor device in a first portion of the active semiconductor layer and forming one of a waveguide and detector in a second portion of the active semiconductor layer adjacent the first portion, wherein the semiconductor device includes regions of alternating low index of refraction and high index of refraction material form an optical grating; forming a first dielectric layer over the semiconductor substrate; forming a first metal layer substantially around and adjacent to the semiconductor device in the first portion of the active semiconductor layer while leaving a portion of the first dielectric layer over the semiconductor device in the first portion of the active semiconductor layer and over the waveguide or detector in the second portion of the active semiconductor layer, wherein the first metal layer includes a circular shape having one or more discontinuities, further wherein a minimal proximity of the first metal layer to the semiconductor device in the first portion of the active semiconductor layer and the waveguide or detector in the second portion of the active semiconductor layer is selected to substantially eliminate any undesirable optical interference between the same; forming a second dielectric layer over the semiconductor layer; and forming a second metal layer over and substantially aligned to the first metal layer and to surround an area overlying the semiconductor device in the first portion of the active semiconductor layer, the second metal layer further including a circular shape without having a discontinuity.