Patent ID: 7811863

Claim:
A method of making a semiconductor chip assembly, comprising: providing a routing line; then mechanically attaching a semiconductor chip to the routing line, wherein the chip includes first and second opposing surfaces, and the first surface of the chip includes a conductive pad; forming a metal pillar on the routing line, wherein the metal pillar includes first and second opposing surfaces; then forming an encapsulant that includes first and second opposing surfaces, wherein the first surfaces of the metal pillar and the encapsulant face in a first direction, the second surfaces of the metal pillar and the encapsulant face in a second direction opposite the first direction, the chip is embedded in the encapsulant and extends vertically beyond the routing line in the first direction, the routing line extends laterally beyond the metal pillar towards the chip and extends vertically beyond the chip and the metal pillar in the second direction, the metal pillar is embedded in the encapsulant and disposed outside a periphery of the chip and extends vertically beyond the routing line in the first direction and extends vertically across most or all of a thickness of the chip between the first and second surfaces of the chip, and the encapsulant covers and extends vertically beyond the chip and the metal pillar in the first direction; then grinding the encapsulant without grinding the metal pillar such that the first surface of the encapsulant migrates in the second direction, and then grinding the encapsulant and the metal pillar such that the first surfaces of the encapsulant and the metal pillar migrate in the second direction, thereby exposing the metal pillar such that the metal pillar and the encapsulant are laterally aligned with one another at a lateral surface that faces in the first direction; and then attaching a heat sink to the metal pillar, wherein the heat sink contacts the metal pillar and covers the chip in the first direction and extends vertically beyond the chip and the metal pillar in the first direction.