Patent ID: 9516152
Filing Date: 2016-12-06
CPC Classification: B29D,B32B,G01J,G01S,G01V,H01L,H03K,H04M,Y10T

Claim Text:
1. A method of fabricating a plurality of optical proximity sensor modules, the method comprising: providing a substrate wafer having a first surface on which a plurality of light emitters are mounted and a plurality of light detectors are mounted, wherein each light emitter is disposed adjacent a corresponding one of the light detectors, the light emitters and light detectors being mounted on the substrate wafer in an arrangement, and wherein the light emitters are operable to emit light at a first wavelength and the light detectors are operable to detect light at the first wavelength; providing a spacer wafer composed of a first polymer material that is thermally stable up to at least 260° C., wherein the spacer wafer has openings in an arrangement substantially corresponding to the arrangement of the light emitters and light detectors on the substrate wafer; providing an optics wafer composed of a second polymer material that is thermally stable up to about 260° C., the optics wafer comprising (1) a blocking portion that substantially attenuates or blocks incident light at the first wavelength, and (2) a plurality of first and second transparent portions that are transparent to light at the first wavelength, the first and second transparent portions being arranged in an arrangement substantially corresponding to the arrangement of the light emitters and light detectors on the substrate wafer; bonding the substrate wafer, the spacer wafer, and the optics wafer together in a wafer stack, in which the spacer wafer is arranged between the substrate wafer and the optics wafer such that the light emitters and light detectors are disposed between the substrate wafer and the optics wafer; and separating the wafer stack into a plurality of modules, each of which includes one of the light emitters and one of the light detectors.