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:
May. 25, 2010
Filed:
Oct. 10, 2003
BO Gu, North Andover, MA (US);
Donald V. Smart, Boston, MA (US);
James J. Cordingley, Littleton, MA (US);
Joohan Lee, Andover, MA (US);
Donald J. Svetkoff, Ann Arbor, MI (US);
Shepard D. Johnson, Andover, MA (US);
Jonathan S. Ehrmann, Sudbury, MA (US);
Bo Gu, North Andover, MA (US);
Donald V. Smart, Boston, MA (US);
James J. Cordingley, Littleton, MA (US);
Joohan Lee, Andover, MA (US);
Donald J. Svetkoff, Ann Arbor, MI (US);
Shepard D. Johnson, Andover, MA (US);
Jonathan S. Ehrmann, Sudbury, MA (US);
GSI Group Corporation, Bedford, MA (US);
Abstract
A laser-based method of removing a target link structure of a circuit fabricated on a substrate includes generating a pulsed laser output at a pre-determined wavelength less than an absorption edge of the substrate. The laser output includes at least one pulse having a pulse duration in the range of about 10 picoseconds to less than 1 nanosecond, the pulse duration being within a thermal laser processing range. The method also includes delivering and focusing the laser output onto the target link structure. The focused laser output has sufficient power density at a location within the target structure to reduce the reflectivity of the target structure and efficiently couple the focused laser output into the target structure to remove the link without damaging the substrate.