Patent ID: 9453977
Filing Date: 2016-09-27
CPC Classification: G02B,H01L

Claim Text:
1. A device, comprising: an insulating layer; a silicon layer on said insulating layer; an optical waveguide formed in said silicon layer by a first region of said silicon layer doped with a first conductivity type and laterally delimited by two outside insulating regions extending completely through the silicon layer, the optical waveguide further defined by an upper insulating layer positioned between the outside insulating regions; and a protection circuit comprising a second region of said silicon layer doped with a second conductivity type positioned adjacent and in contact with the first region and a third region of said silicon layer more heavily doped with said second conductivity type positioned above and in contact with said second region; wherein the third region is insulated from the first region by said upper insulating layer and is further positioned between said upper insulating layer and one of the two outside insulating regions.