Patent ID: 8877561
Filing Date: 2014-11-04
Classification: H01L

Abstract:
1. A method of fabricating an electronic device, the method comprising: applying an anisotropic conductive adhesive (ACA) onto a surface of a wafer comprising a plurality of unsingulated chips, each chip comprising a plurality of electrical contacts each having a top surface substantially coplanar with or recessed below a surface of the chip surrounding the electrical contact; thereafter, singulating the wafer into individual chips, each chip comprising first and second electrical contacts with the ACA thereover; providing a substrate having first and second conductive traces on a first surface thereof in a bonding region, the first and second conductive traces being separated by a gap therebetween; positioning the first and second electrical contacts of one of the chips over the first and second conductive traces, a portion of the ACA being disposed between the electrical contacts and the traces; and bonding the first and second electrical contacts of the chip to the first and second traces, respectively, thereby establishing electrical connection between at least one of (i) the first electrical contact and the first trace or (ii) the second electrical contact and the second trace, but without electrically bridging the traces together or electrically bridging the electrical contacts together, wherein, for each unsingulated chip, each of the plurality of electrical contacts is in direct physical contact with (i) a semiconductor portion of the wafer thereunder and (ii) the ACA.