Patent ID: 8092734

Claim:
A method of fabricating microelectronic imaging units, comprising: providing a cover workpiece, wherein the cover workpiece comprises a first substrate transmissive to a radiation and a plurality of covers on and/or in the first substrate, sidewalls of the covers being stand-offs, the covers having windows from which the stand-offs project; providing a microfeature workpiece including a second substrate having a plurality of microelectronic dies, the dies being within the second substrate, the dies having image sensors on a first surface of the second substrate, integrated circuits electrically coupled to corresponding image sensors, and terminals on the first surface of the second substrate electrically coupled to corresponding integrated circuits via leads buried in the second substrate; and assembling the covers with corresponding dies so that the windows are aligned with corresponding image sensors and the stand-offs directly contact the second substrate between the terminals and the image sensors of corresponding dies.