Texas Instruments Corporation

James F Haefling

Roger J Stierman

Thomas H Ramsey

James W Pritchard

K Gail Heinen

A substrate for mounting a flip-chip on a metallized circuit on the upper surface of the substrate. The substrate is silicon carbide condensed on a graphite or silicon core. The upper surface of the silicon carbide has a layer of insulating material comprised of silicon oxide, silicon nitride, aluminum nitride, boron nitride, an organic insulator such as polyimide, and diamond. The insulator prevents inadvertent shorting of the integrated circuit. The insulating layer can be deposited on the silicon carbide by such processes as chemical vapor deposition, sputtering, spinning or roller coating.

Insulated substrate for flip-chip integrated circuit device

A bonding apparatus for bonding lead wires to a semiconductor surface includes a supply spool that contains a supply of the bonding wire that is fed to a capillary that is made of a non-conductive material. An electric arc forms a ball on the tip of the arc and the ball is retracted into the capillary. The ball is heated and compressed onto the semiconductor substrate and is then stitched over to a second bonding point which in most applications is the interface pin of the semiconductor device. The capillary has a non-conductive end that prevents coating of the capillary tip with the molten metal that results from the arcing of the bonding wire.

Growing community of inventors

Richardson, TX, United States of America

James F Haefling