Patent ID: 9525093
Filing Date: 2016-12-20
CPC Classification: B05D,G01D,G01J,G01N,G01S,G01V,H01L,H03K

Claim Text:
1. A method of making an optical sensor, comprising: mounting a light emitter on a substrate, the light emitter comprising a semiconductor emitter die having a major emitter surface; mounting a light detector on the substrate, the light detector being spaced apart from the light emitter on the substrate, the light detector comprising a semiconductor detector die having a major detector surface; forming or placing a first light pass component over at least portions of the light emitter, the first light pass component comprising first external surfaces; forming or placing a second light pass component over at least portions of the light detector such that at least portions of the first and second components are separated by a gap, the second light pass component comprising second external surfaces, the gap corresponding to a void of material, the gap formed by extending a groove inwardly past at least one of the major emitter surface and the major detector surface to a base extremity of the groove; forming or placing a removeable masking layer over first and second masking regions of the first and second external surfaces; forming or placing a layer of light attenuating or blocking material over at least portions of the first and second external surfaces located adjacent to the gap, the light attenuating material being configured to attenuate or block substantially transmission of undesired direct, scattered or reflected light between the light emitter and the light detector and thereby substantially avoid optical crosstalk and interference between the light emitter and the light detector; and removing the removeable masking layer from the first and second masking regions of the first and second external surfaces.