Method of making a semiconductor chip assembly with a copper/aluminum post/base heat spreader

摘要

A method of making a semiconductor chip assembly includes providing a post and a base that include a copper surface layer and an aluminum core, mounting an adhesive on the base including inserting the post into an opening in the adhesive, mounting a conductive layer on the adhesive including aligning the post with an aperture in the conductive layer, then flowing the adhesive into and upward in a gap located in the aperture between the post and the conductive layer, solidifying the adhesive, then providing a conductive trace that includes a pad, a terminal and a selected portion of the conductive layer, mounting a semiconductor device on a heat spreader that includes the post and the base, electrically connecting the semiconductor device to the conductive trace and thermally connecting the semiconductor device to the heat spreader.