Patent ID: 11906351
Assignee: NATIONAL TECHNOLOGY & ENGINEERING SOLUTIONS OF SANDIA, LLC
Field: Optics (Instruments)
Classification: CPC G  H | IPC G

Claim 15:
16. An optical detector comprising:
a substrate doped with a first dopant type, the substrate adapted to be a cathode;
one or more anodes formed in a surface of the substrate, the one or more anodes doped with a second dopant type;
one or more deep guard ring implants formed in the surface of the substrate, the one or more deep guard ring implants doped with the second dopant type, each of the one or more deep guard ring implants formed around a corresponding one of the one or more anodes;
a substrate contact formed in the surface of the substrate around the one or more anodes, the substrate contact doped with the first dopant type;
a first oxide layer formed on the surface of the substrate, a first aperture formed in the first oxide layer exposing at least the one or more anodes;
one or more first vias formed through the first oxide layer, each of the one or more first vias in electrical contact with a corresponding one of the one or more anodes;
a second via formed through the first oxide layer, the second via in electrical contact with the substrate contact;
a first metal layer formed on the first oxide layer, the one or more first vias and the second via in electrical contact with the first metal layer, a second aperture formed in the first metal layer directly over the first aperture;
a second oxide layer formed on the first metal layer, a third aperture formed in the second oxide layer directly over the second; and
a second metal layer formed on the second oxide layer, the second metal layer including a mesh suspended over the third aperture, the mesh adapted to allow light to fall on the one or more anodes, the mesh further adapted to provide electric field shielding.