Metal working – Method of mechanical manufacture – With testing or indicating
Patent
1996-10-11
1999-11-16
Bryant, David P.
Metal working
Method of mechanical manufacture
With testing or indicating
29833, 29834, 29464, 29721, 33562, B23Q 1700
Patent
active
059834773
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.
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Jacks David C.
Walston Randall R.
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