Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


BGA Baking & Tape and Reel Issue

#30497

BGA Baking & Tape and Reel Issue | 14 September, 2004

Folks,

At the moment I bake all BGA that are in unsealed trays, to reduce moisture etc. Is this common practice or are there particular manufacturuers that cause more problems.

Also, the tape for BGA tape & reel has a hole in the tape (as is normal practice). Should I see less problems with T&R BGA than Trays. Because the tape is not completly sealed, are the BGAs still taking in moisture or are they not as the hole is somewhat sealed from the overlap, from being reeled, on the reel.

Looking forward to your comments. Mark

reply »

#30566

BGA Baking & Tape and Reel Issue | 16 September, 2004

Left to its own devices the plastic used to seal your parts will take-on moisture in the air. When you heat there parts the water in the part expands and can damage the part, if not properly demoisturized.

The instustry standards for controlling such parts are: http://www.jedec.org/download/search/jstd033a.pdf

http://www.jedec.org/DOWNLOAD/search/jstd020b.pdf

For more information: * Search the fine SMTnet Archives * Look to Daan Terstegge's outstanding jump site: http://www.smtinfo.net/Db/_Moisture%20Sensitivity.html

* Other articles: http://www.totechamerica.com/html/technical_download.php

reply »

PCB Soldering Tools

ii-feed SMT Intelligent Feeder