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:
Jan. 16, 1990
Filed:
Dec. 13, 1988
Pedro A Chalco, Yorktown Heights, NY (US);
Joseph C Andreshak, Mahopac, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A laser assisted miniature heater 10 includes an elongated hollow bar 12 having a high thermal conductivity and a supporting member 14 for conveying an optical fiber 16 which transmits laser radiation to an interiorly disposed hollow cavity 18. The interior surfaces 20 of the cavity 18 are reflective to the laser radiation such that the radiation undergoes repetitive internal reflections along a longitudinal axis of the bar 12. While repetitively reflecting within the cavity 18 the laser radiation is gradually absorbed into the walls of the cavity 18. The absorption of the laser radiation induces a uniform heating of the bar 12 to a temperature which exceeds the melting temperature of eutectic solder. The outer surface 22 of the bar 12, when placed in contact with a plurality of component leads which are each adjacent to a respective solder-bearing bonding pad, induces a melting of the solder and the physical and electrical coupling of the leads to their associated bonding pads.