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:
Feb. 27, 2001
Filed:
Feb. 05, 1999
William D. Bjorndahl, Torrance, CA (US);
D. Ian Stones, Torrance, CA (US);
Kenneth C. Selk, Hermosa Beach, CA (US);
Roger A. Davidheiser, Manhattan Beach, CA (US);
Alfred E. Lee, Torrance, CA (US);
TRW Inc., Redondo Beach, CA (US);
Abstract
A high frequency coaxial interconnection solder ball grid array produces a low loss, reproducible electrical interconnection at the circuit board level for mounting one or more high frequency components, such as high frequency IMA modules. Since the coaxial interconnection ball grid array can be and is generally implemented as part of a larger ball grid array, high frequency signal generation, signal reception and digital processing can be combined in a single electronic component, such as a circuit board. A coaxial-like interconnection is formed from a plurality of solder balls configured in a three-by-three square array. The coaxial interconnection solder ball grid array includes a single centrally disposed solder ball for interconnecting with a centrally disposed conductor of a coaxial line and a plurality of solder balls surrounding the single centrally disposed solder ball, some balls of which interconnect with a coaxial ground shield of the coaxial line. When soldered together, the centrally disposed solder ball and the central conductor of the coaxial line have the appearance of a rod with a diameter having a standard 50 ohm impedance. The outer conductive shield or ground signal path of the coaxial line is connected with multiple solder balls, to achieve a lower inductance ground-to-ground connection.