Electronics Forum | Wed Dec 19 20:42:55 EST 2007 | davef
gersla: You're correct that carriers of low temperature material will disfigure and become useless at 125*C bake temperatures. The reason you can not find 70*C bake data is: J-STD033B, "4.2.2 Low Temperature Carriers. SMD packages shipped in low tem
Electronics Forum | Mon Oct 04 15:10:42 EDT 2010 | 18424
Hi Michelle, Due to the dense population of through hole on some boards, after a 35 minute wash, some connectors or battery holders remain wet. Currently we put them into drying ovens at 70c for a Minimum of a half hour. We do occasionally air dry un
Electronics Forum | Mon Jun 17 21:16:19 EDT 2002 | davef
You�re correct about J-001. It�s interesting though, I find no references to controlling temperature and humidity as an element of an electrostatic discharge control program in the following: * ANSI/ESD S20-20 * "ESD Program Management" by Ted Dan
Electronics Forum | Mon Jun 21 07:48:23 EDT 2004 | BobL
Contact Jim Marquis at Kimchuk, Inc. (203) 790-7800. They are marketing a rack and stack product that allows you to store the pc boards flat. It is esd safe and eliminates damage from handling boards. I have been in electronic manufacturing for 20 ye
Electronics Forum | Fri Oct 08 16:36:28 EDT 1999 | Glenn Robertson
| We've recently encountered this problem where one of our .050" pitch BGA's were reflowing at the wave thus causing shorts... The board was profiled with probes stuck to a QFP solder joint, an 0603, and one of the BGA joints. There was an almost 7
Electronics Forum | Thu Aug 30 17:59:29 EDT 2012 | rway
It should also be noted that if you can control your humidity, you can reduce the chance of static build-up. Do you monitor the humidity in your facility? This alone, can be the greatest contributor to static build-up and ESD damage. But back to t
Electronics Forum | Thu Sep 29 10:21:11 EDT 2011 | davef
1. Floor loading requirement - The designer of your factory building specified the flooring with a certain floor loading capability. You need to determine that capability. You plan to install machines and equipment. You need to determine the weight o
Electronics Forum | Thu Aug 30 22:44:05 EDT 2012 | rway
I'm not saying that any unexplained failure is caused by ESD and I certainly am not promoting fear. I sleep very well at night (except after eating Mexican food, which can cause discharges as well). What I am saying is that ESD is a real threat and
Electronics Forum | Wed Apr 11 22:05:58 EDT 2001 | davef
OA pastes are more hydroscopic than NC pastes. Hydroscopic. The capacity of a material to absorb and retain moisture from the ambient air. Sometimes this is compounded if you remove paste from the frig and let it warm to room temperature, because
Electronics Forum | Fri Aug 22 10:11:52 EDT 2003 | Stephen
An asteroid the size of texas is more likely to hit the earth than to get a BGA with one ball at the absolute max and another at the absolute minimum. The manufacturer is going to give themselves some leaway. What are you going to do about the more
