Patent ID: 6939737

Claim:
A method of manufacturing an electronic device, which includes a substrate having a back surface and a first thermal expansion coefficient, a plurality of electronic components coupled to the substrate, and a plurality of device electrical contacts coupled to the back surface of the substrate and electrically coupled to the plurality of electronic components, and a coupled flexible circuit board, which includes a flexible substrate having a front surface and a back surface, and a plurality of circuit board electrical contacts coupled to the front surface of the flexible substrate corresponding to plurality of device electrical contacts, comprising the steps of: a) providing the electronic device; b) providing the flexible circuit board; c) forming a plurality of conductive bumps on at least one of the electronic device and the flexible circuit board, for each device electrical contact, a conductive bump formed on at least one of that device electrical contact and a corresponding circuit board electrical contact; d) aligning the plurality of device electrical contacts of the electronic device and the corresponding plurality of circuit board electrical contacts; e) pressing the electronic device and the flexible circuit board together such that at least one of the plurality of conductive bumps spans the gap between each device electrical contact and the corresponding circuit board electrical contact; and f) curing the plurality of conductive bumps to form a plurality of Z-interconnections electrically and mechanically coupling the plurality of device electrical contacts to the corresponding plurality of circuit board electrical contacts.