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:
Nov. 16, 1999
Filed:
Oct. 11, 1996
David C Jacks, Pomona, CA (US);
Randall R Walston, Torrance, CA (US);
Other;
Abstract
A template for aligning a rework tool head and a substrate (such as a printed circuit board) for the accurate placement of a ball grid array package on the substrate with the head, prior to soldering the package to the substrate. The template has a top formed to attach the template to the head in a reproducible position and an indicator rigidly connected to the top to align the template to a feature on the substrate. In one embodiment, the template has a top side formed to mimic the top of the ball grid array package and a bottom side rigidly connected to the top side and formed to show the placement of the balls on the bottom of the ball grid array package in reference to the top of the ball grid array package. Used for the accurate placement of a ball grid array package on a substrate with a head, this embodiment of the template is attached to the head in the place of the package, the head and/or substrate are moved to align bottom of the template with the part of the substrate to which the package is to be attached, and removing the template from the head without changing the alignment.