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:
Oct. 18, 1977
Filed:
Oct. 14, 1975
Steven F Edwards, Dallas, TX (US);
James A Johnson, Lewisville, TX (US);
William D Jordan, Dallas, TX (US);
James D Pritchett, Dallas, TX (US);
Thermalloy, Inc., Dallas, TX (US);
Abstract
Disclosed is a unitary heat sink apparatus in the form of a U-shaped body of thermally conductive material adapted for use in connection with semiconductor device packages having a thermally conductive transfer plate adjacent one major face of the device package. Typical of such device packages is the TO-220 plastic power package. One leg of the U-shaped clip urges the thermal transfer plate into intimate contact with a flat portion of the opposite leg by the spring action provided by the base of the U. An aperture in the base of the U allows the leads to extend from the heat sink. Fins are included on one leg of the heat sink and means for attaching the heat sink apparatus to printed circuit boards are also disclosed.