Patent ID: 8525214

Claim:
A semiconductor chip assembly, comprising: a semiconductor device; an adhesive that includes an opening; a support layer; a heat spreader that includes a post, a base, a cap, an underlayer and a thermal via, wherein (i) the post is adjacent to and integral with the base and extends above the base in an upward direction, (ii) the base covers the post in a downward direction opposite the upward direction, extends laterally from the post in lateral directions orthogonal to the upward and downward directions and is sandwiched between the post and the underlayer, (iii) the cap extends above and is adjacent to and covers in the upward direction and extends laterally from a top of the post, (iv) the underlayer extends below and is spaced from the base, covers the post in the downward direction and extends laterally beyond the post, and (v) the thermal via extends from the base to the underlayer, is spaced from and laterally offset from the post and the cap and provides a thermally conductive path between the base and the underlayer; and a conductive trace that includes a pad and a terminal; wherein the semiconductor device is mounted on the cap, overlaps the post, the base, the cap, the support layer and the underlayer, is electrically connected to the pad and thereby electrically connected to the terminal and is thermally connected to the cap and thereby thermally connected to the underlayer; wherein the adhesive is mounted on and extends above the base, extends laterally from the post to or beyond the terminal and is sandwiched between the base and the pad; wherein the support layer is sandwiched between the base and the underlayer, covers the post in the downward direction and extends laterally beyond the post; wherein the post extends into the opening, the base is sandwiched between the adhesive and the support layer, the cap overlaps the adhesive, the thermal via extends through the support layer and the underlayer extends below the semiconductor device, the support layer and the pad; and wherein the post, the base, the cap and the underlayer are metallic and the support layer is non-metallic, wherein the thermal via includes a plated through-hole that is metallurgically bonded to the base and the underlayer, extends above the post and the adhesive and extends through the base and the adhesive.