Electronics Forum: ibm and ccga and design and rules (Page 1 of 1)

CCGA - Stencil design and Reflow Profiling

Electronics Forum | Wed Jul 24 17:25:01 EDT 2019 | davef

Your solder stencil design should follow all basic rules for solder stencil design are followed in accordance with IPC-7525 including adherence to an area ratio of 2:3 or greater and an aspect ratio of 1.5 or greater.

CCGA and overprinting?

Electronics Forum | Mon Oct 15 10:51:49 EDT 2001 | davef

On over printing, the general issues are: * Paste deposits being so large that when reflowing, collapse onto many, rather than a single solder mass. * Paste expanding during heating and being close to other solder deposits and bridging [as you say].


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