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. 25, 2003
Filed:
Aug. 20, 1999
John K. Arledge, Ft. Lauderdale, FL (US);
Joaquin Barreto, Coral Springs, FL (US);
Thomas J. Swirbel, Davie, FL (US);
Jeffrey A. Underwood, Sunrise, FL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A method of forming a coaxial transmission line on a high density PCB. A metal layer ( ) on the PCB ( ) forms the bottom part of the shield, and is covered by a first dielectric ( ). Two parallel trenches ( ) are formed in the first dielectric to reveal part ( ) of the metal strip. The signal conductor ( ) is then formed on the first dielectric. A second dielectric ( ) covers the signal conductor and the first dielectric. A second set of two parallel trenches ( ) are formed in the second dielectric immediately above the first two trenches. Metal deposit ( ) is plated in the parallel trenches to contact the metal strip, and also covers a portion of the second dielectric that lies between the trenches, to create a shield. The resulting coaxial transmission line has a center conductor insulated from the shield by the dielectrics.