Patent ID: 8269300

Claim:
A packaged device assembly, comprising: an interposer having a die attach region in a first portion of a first surface of the interposer and wire bond attachment regions disposed in a second portion of the first surface of the interposer; an image sensor die having a bottom surface and an opposed top surface, the bottom surface mounted to the die attach region of the interposer and the top surface having an array of pixels in a central region of the image sensor die and wire bond contact pads in an edge region peripheral to the array of pixels; wire bonds to provide electrical connections between individual wire bond attachment regions on the interposer and wire bond contact pads of the image sensor, the wire bonds having a curvature such that the wire bonds extend above the top surface of the image sensor die; a transparent cover attached to the top surface of the image sensor via a spacer paste having spacers that are organic polymer spheres, the spacer paste being dispensed in a region of said top surface exterior to said central region on said top surface of said image sensor die to form a dam about the array of pixels with the dam further forming a cavity about the central region between the transparent cover and the top surface of the image sensor die, the transparent cover extending over the image sensor die and including overhangs extending over the wire bond attachment region; and an encapsulant formed underneath the transparent cover in a region exterior to the cavity and the dam to encapsulate the wire bonds; the dam having a dam height above the top surface of the image sensor die, the dam structurally configured to allow safe clearance of the wire bonds under the transparent cover, and the dam encapsulating a portion of the wire bonds extending above the top surface of the image sensor die, wherein the dam is comprised substantially of only the spacer paste on the top surface, and the dam height being substantially equal to the size of the polymer spheres.