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:
Aug. 09, 2016
Filed:
Sep. 20, 2013
Applicant:
Coherent, Inc., Santa Clara, CA (US);
Inventors:
Gongxue Hua, Unionville, CT (US);
Eric R. Mueller, West Suffield, CT (US);
Assignee:
Coherent, Inc., Santa Clara, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23K 26/00 (2014.01); B23K 26/16 (2006.01); H05K 3/00 (2006.01); B23K 26/38 (2014.01); B23K 26/06 (2014.01); B23K 26/40 (2014.01);
U.S. Cl.
CPC ...
H05K 3/0026 (2013.01); B23K 26/0622 (2015.10); B23K 26/0643 (2013.01); B23K 26/0652 (2013.01); B23K 26/38 (2013.01); B23K 26/382 (2015.10); B23K 26/40 (2013.01); B23K 26/704 (2015.10); B23K 2201/42 (2013.01); B23K 2203/50 (2015.10);
Abstract
Apparatus for drilling a via-hole in a printed circuit board (PCB) includes a carbon monoxide laser deliver laser radiation pulses. The pulses have a relatively broad wavelength-range, and slow rising and falling edges. The rising and falling edges of the pulses are clipped using and acousto-optic modulator. A dispersion-compensator compensates for dispersion in the clipped pulses introduced by the AOM. Achromatic focusing optics focus the dispersion-compensated, clipped pulses on the PCB for the via-hole drilling.