Patent ID: 9634050
Date: 2017-04-25
CPC Classifications: B29D,H01L

Claim:
1. A method of fabricating an optics wafer, the method comprising: providing a wafer comprising a core region composed of a glass-reinforced epoxy, the wafer further comprising a first resin layer on a top surface of the core region and a second resin layer on a bottom surface of the core region, wherein the core region and first and second resin layers are substantially non-transparent for an infrared or near infrared portion of the electromagnetic spectrum, the first and second resin layers being composed of a glass-free black epoxy, the wafer further including vertical transparent regions that extend through the core region and the first and second resin layers and are composed of a solid material that is substantially transparent for the infrared or near infrared portion of the electromagnetic spectrum; thinning the wafer from its top surface and its bottom surface so that a resulting thickness is within a predetermined range without causing glass fibers of the core region to become exposed; and providing respective optical structures on one or more exposed surfaces of at least some of the transparent regions.