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:
Mar. 30, 1993
Filed:
Nov. 01, 1991
James R Phillips, Albuquerque, NM (US);
Ali Tootoonchi, Albuquerque, NM (US);
John F Dullea, Albuquerque, NM (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A laser tuning method for tuning a ceramic passband filter comprises forming an untuned filter that includes at least one metallized element, such as a resonator pad, formed of an undersized metal plate. A thick film of a metal powder paste is applied to the filter adjacent to the undersized plate. The paste film is scanned with a laser beam to sinter the metal particles into an integral plate, thereby adjusting the size and shape of the element to obtain a desired performance characteristic. In one aspect of this invention, an output signal in response to a test signal is monitored while laser scanning the paste film, whereupon the laser beam is discontinued when the desired characteristic has been obtained.