Electronics Forum | Tue Feb 26 07:55:23 EST 2002 | cyber_wolf
I know that there is an IPC spec. for board pad size design for BGA components. After a little research we have found that recommendations vary from component manufacturers to board houses. (These recommendations are different than what IPC says....
Electronics Forum | Tue Feb 26 08:02:30 EST 2002 | cyber_wolf
I know that there is an IPC spec. for board pad size design for BGA components. After a little research we have found that recommendations vary from component manufacturers to board houses. (These recommendations are different than what IPC says....)
Electronics Forum | Tue Feb 26 10:42:48 EST 2002 | davef
Consider the hierarchy presented in http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=18112
Electronics Forum | Thu Sep 12 10:45:29 EDT 2002 | pbarton
We have used a laser cut stencil 0.15mm (0.006") thick with 0.3mm (0.012") square apertures radiused in the corners 0.06mm (0.0025") to aid paste release. This approach with the (type 3) paste we use has proven successful on thousands of devices plac
Electronics Forum | Thu Aug 12 10:49:22 EDT 1999 | Ray Hare
I am currently involved with designing a pcb which will use 225 pin bga,s The problem with this design is that the components will dissipate a lot of heat and the design we have come up with is use the middle 6 or 7 rows of balls as the grounding,th
Electronics Forum | Tue Feb 07 16:32:13 EST 2023 | glasscake
Good ventilation is also important to removing aerosols and other vapors. Make sure your building HVAC is pulling in a good portion of outside air. If people are complaining try to up the ratio of recirculated/outside air. This will add cost dependin
Electronics Forum | Thu Aug 20 13:04:57 EDT 2015 | dyoungquist
Try Axiom Electronics in Beaverton. They do BGA X-ray and BGA rework/replacement for us. I don't know what your exact needs are but give them a try. www.axiomsmt.com
Electronics Forum | Thu May 04 11:07:23 EDT 2006 | JW
Hello, During a recent customer audit, one of their auditors asked if we measured airborne particles in our SMT operation area. Within their operations, they mentioned a concern when placing micro-BGA's. My question is: do some SMT lines use a pseudo
Electronics Forum | Sat May 06 16:43:45 EDT 2006 | grantp
Hi, We have had some failures due to particles, but only larger visible particles such and you should not need a real "clean room" but it's important to make sure things are kept clean, and sweep and mop as often as you need to make sure everything
Electronics Forum | Tue Feb 07 11:55:27 EST 2023 | tommy_magyar
What I would look at is the chemicals being used in the facility where the complaints are. Flux/flux gel, IPA, cleaning agents, etc. Perhaps you should limit the usage to certain people only, who would be trained how to properly use these. Something
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