Patent ID: 9029986
Filing Date: 2015-05-12
Classification: G03F,H01L

Abstract:
1. A semiconductor device comprising: a substrate having a principal surface; a semiconductor layer on the principal surface of the substrate, wherein the semiconductor layer is substantially optically transparent at a wavelength used for alignment and has an outer surface; a first dielectric layer on the outer surface; a device region and an alignment region formed in the first dielectric layer above the principal surface, wherein the device region comprises an upper surface covered by the first dielectric layer with exposed lateral edges where the first dielectric layer and the semiconductor layer have been removed; an optically opaque region on the alignment region, wherein the optically opaque region is optically opaque at the wavelength used for alignment; a second dielectric layer over the device region and the optically opaque region on the alignment region, wherein the second dielectric layer is a single and substantially contiguous layer that continuously covers the entire upper surface of the device region and that also completely covers the exposed lateral edges of the device region; and an alignment pattern formed in the second dielectric layer on the alignment region; and one or more vias in the dielectric layers on the device region.