Patent ID: 9653504
Date: 2017-05-16
CPC Classifications: H01L

Claim:
1. A chip-scale image sensor packaging method with black masking, comprising: adhering (a) a composite wafer including a plurality of image sensors bonded to a common glass substrate directly to (b) an adhesive tape to stabilize relative positions of the image sensors until a subsequent step of dicing, wherein the common glass substrate faces away from the adhesive tape; cutting through full height of the composite wafer in dimension parallel to the optical axis to form slots in the common glass substrate, the slots defining a cover glass for each of the image sensors, respectively; forming black mask in the slots such that the black mask, for each of the image sensors, spans perimeter of the cover glass as viewed cross-sectionally along optical axis of the image sensors, said forming including (a) depositing black photo resist on the composite wafer, and (b) photolithographically developing the black photo resist such that the black mask, for each of the chip-scale packaged image sensors, includes a protruding portion extending beyond light receiving surface of the cover glass in dimension parallel to the optical axis; dicing through the black mask in the slots to singulate a plurality of chip-scale packaged image sensors each including one of the image sensors and the cover glass bonded thereto, with sides of the cover glass facing away from the optical axis being at least partly covered by the black mask; and after the step of dicing, removing the chip-scale packaged image sensors from the adhesive tape using, for each of the chip-scale packaged image sensors, pick-and-place equipment coupled to the protruding portion.