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. 08, 2002
Filed:
Apr. 26, 2000
Anton Theodore Kitai, Ottawa, CA;
Ian James Miller, Gloucester, CA;
Steven Harold Moffat, Carleton Place, CA;
GSI Lumonics, Inc., Kanata, CA;
Abstract
A material machining system for machining a workpiece (PCB, PWB etc.) for drilling blind vias. The system includes a laser supply system ( ) for supplying discrete machining beams ( ) that are separate from each other. A deflecting devices ( ) is provided for deflecting each of the discrete machining beams to generate multiple independent beams at a plurality of positions within a field of operation on the workpiece. A scan lens ( ) having an entrance pupil configured to receive the multiple independent beams from the deflecting devices is provided proximate to the entrance pupil of the scan lens. A computer is used for controlling the deflecting devices to change the respective positions of the multiple independent beams in at least one co-ordinate direction within the field of operation. The deflecting devices include galvo/mirror pairs at the entrance pupil of the scan lens. This is accomplished since the scan lens has a relatively large entrance pupil and the mirror parts are small. The advantage of this arrangement is the ability of all beams to access a full working field (typically 2×2 inches) on the workpiece simultaneously, so that the highest efficiency of laser power utilization is achieved.