Patent ID: 7807508

Claim:
A method of fabricating a microelectronic unit, the method comprising: providing a semiconductor chip having a front surface, a rear surface remote from the front surface, at least one of conductive material or semiconductive material exposed at least at the front surface, and a plurality of first conductive contacts exposed at the front surface, at least some of the first conductive contacts being insulated from the at least one of exposed conductive material or semiconductive material; electrophoretically depositing an insulative layer onto the at least one of exposed conductive material or semiconductive material; forming a plurality of rear conductive traces on the rear surface of the semiconductor chip; forming a plurality of front conductive traces on the insulative layer on the front surface of the semiconductor chip in conductive communication with the first conductive contacts; electrophoretically depositing a further insulative layer onto at least a portion of the front conductive traces; forming a plurality of further conductive traces on at least part of the further insulative layer on the front surface of the semiconductor chip in conductive communication with the front conductive traces; and forming a plurality of edge conductive traces that extend between the front and the rear conductive traces, the edge conductive traces being formed atop edge surfaces that extend between the front surface and the rear surface of the semiconductor chip thereby conductively connecting one or more of the front conductive traces and the further conductive traces to the rear conductive traces.