Patent ID: 7459385
Filing Date: 2008-12-02
Classification: H01L

Abstract:
1. A method of making a semiconductor chip assembly, comprising: providing a metal base, a routing line, a bumped terminal and a filler, wherein the routing line is adjacent to the bumped terminal and contacts the metal base, the bumped terminal contacts the metal base in a recess in the metal base and includes a cavity that extends into and faces away from the recess, and the filler contacts the bumped terminal in the cavity and extends into the recess; then mechanically attaching a semiconductor chip to the metal base, the routing line, the bumped terminal and the filler, wherein the chip includes first and second opposing surfaces, and the first surface of the chip includes a conductive pad; forming a connection joint that electrically connects the routing line and the pad; forming an encapsulant after attaching the chip to the metal base, the routing line, the bumped terminal and the filler, wherein the encapsulant includes a first surface that faces in a first direction and a second surface that faces in a second direction opposite the first direction, the encapsulant covers the chip and extends vertically beyond the chip, the metal base, the routing line, the bumped terminal and the filler in the first direction, the chip is embedded in the encapsulant, the metal base extends vertically beyond the chip, the routing line, the bumped terminal and the filler in the second direction, the routing line extends laterally beyond the bumped terminal and the filler, the bumped terminal extends vertically beyond the routing line and the filler in the second direction, the filler extends vertically beyond the routing line in the second direction, and the cavity extends through the bumped terminal in the first direction but not the second direction and is covered by the metal base and the bumped terminal in the second direction; etching the metal base after forming the encapsulant, thereby exposing the routing line and the bumped terminal without exposing the filler; and then grinding the bumped terminal, thereby exposing the filler in the cavity such that the cavity extends through the bumped terminal in the second direction.