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. 06, 2004
Filed:
Mar. 07, 2001
Applicant:
Inventors:
David V. Caletka, Apalachin, NY (US);
Kevin Knadle, Vestal, NY (US);
Charles G. Woychik, Vestal, NY (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23K 3/112 ; B23K 3/100 ;
U.S. Cl.
CPC ...
B23K 3/112 ; B23K 3/100 ;
Abstract
A method and an arrangement for measuring the cooling rate and temperature differential between the top and bottom surfaces of a printed circuit board. The method is intended to facilitate control over the temperature differential which is encountered between the top and bottom of the printed circuit board so as to prevent warpage thereof during the formation of solder joints in a reflow solder oven.