The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 23, 1999
Filed:
Apr. 08, 1994
Robert H Bond, Plano, TX (US);
Michael J Hundt, Double Oak, TX (US);
STMicroelectronics, Inc., Carrollton, TX (US);
Abstract
An integrated circuit package with a path of high thermal conductivity is disclosed. A thermally conductive slug, formed of a material such as copper, is attached to an underside portion of a substrate, such as a printed circuit board or a ceramic substrate, through which an opening has been formed. An integrated circuit chip is mounted to one side of the slug exposed in the opening. An opposing surface of the slug lies below the plane of the underside of the substrate. The chip is wire bonded to the substrate, and is encapsulated in the conventional manner. Solder balls are attached to a portion of the underside of the substrate not covered by the slug in a ball-grid-array manner, for mounting to a circuit board. Upon mounting to the circuit board, a path of high thermal conductivity is provided between the chip and the circuit board, through the slug and the solder balls.