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:
Jun. 13, 2000
Filed:
Feb. 02, 1999
Applicant:
Inventors:
Christopher Lee Houghton, Westborough, MA (US);
Colin Edward Brench, Stow, MA (US);
Assignee:
Compaq Computer Corporation, Houston, TX (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05K / ;
U.S. Cl.
CPC ...
361704 ; 361707 ; 361709 ; 361719 ; 257706 ; 257712 ; 257713 ; 257718 ; 257719 ; 174 152 ; 174 163 ; 174 51 ; 165 802 ; 165 803 ; 165 804 ;
Abstract
A method and apparatus are disclosed for attenuating RF noise produced by electronic systems by providing low RF impedance shorting of heat dissipating structures, such as heat sinks, to PCB reference planes. The RF impedance shorting path uses existing package pins with dedicated electrical paths through the package to the bottom surface of the heat sink. Such an arrangement provides very low RF impedance because of the minimal length and resistance of the shorting path, and also provides minimal disruption of the PCB design rules and tolerances by using existing package leads.