Electronics Forum | Thu Nov 09 08:06:17 EST 2006 | cyber_wolf
We are having continual problems with our stencil bindings falling apart in our washer. We use a PMR5000 ultrasonic with Vigon sc2000 cleaning fluid. We cycle them in the washer for about 9 minutes. The fluid sometimes heats up to 105 deg F. Our
Electronics Forum | Mon Nov 27 13:36:24 EST 2006 | cyber_wolf
The fluid heats up to 105-110 from the ultrasonics running, and or from the fluid filtering pumps. The rinse temp is always the same as the wash. It is a single tank with a partition welded in between. (One side rinse, and the other side wash) FYI
Electronics Forum | Wed Feb 06 15:51:26 EST 2008 | jax
We have place CSP devices with 0.105mm standoff hights without any issue. The ability to Water Wash all depends on the specifications of your wash... Spray pressure and qty of jets Dwell time, pre-wash/wash/rinse Available detergents or saponifiers
Electronics Forum | Mon Apr 26 18:09:07 EDT 2010 | hegemon
Obviously knowledge in this area is still in a bit of a 'flux'. Dave, you had the right idea, the "putz"s signed off on the responsibility, and sent a new batch o'boards. FAST. This new batch were at least date code in 2010, and we had no issues so
Electronics Forum | Mon Jan 10 16:58:48 EST 2011 | piter
Hi Ripal it seems that you have problem with compatibility of alloy and quality of solder balls. First check solder alloy form BGA balls what is it?(SAC105,SAC305, etc.) what type of solder paste you use?? third thing is what type of finishing you h
Electronics Forum | Sun Mar 20 14:47:29 EDT 2011 | floydf
We are going to be placing BGAs for the first time, and I have some questions. Is it recommended top bake all of the boards and all of the BGAs before production? I have had good luck baking boards that didn't wave solder well. It usually turns out
Electronics Forum | Tue Apr 02 13:43:54 EDT 2013 | ericrr
On one of the products uses a QFP (Quad Flat Package)which is not going on straight, maybe 20 pins per 4 sides. sometimes I have to tweak the alignment before the board goes in the oven, this practice can be a bit of a worry if you over tweak it - pa
Electronics Forum | Tue Jul 31 04:53:28 EDT 2018 | teresat2
The UL Safety Laboratory is the most authoritative in the United States and a large private institution engaged in safety testing and identification. The UL+ number on the PCB mainly represents the UL certification of the circuit board in the United
Electronics Forum | Tue Dec 16 06:42:51 EST 2003 | Kev
I am having problems achieving correct pre-heater temperatures with our Hollis solder wave. Our original "Verification Golden board" program uses a conveyor speed of 5ft per minute and pre-heat temps of 300, 350, 400 respectively. Our "golden Board"
Electronics Forum | Mon Sep 21 20:45:55 EDT 2009 | davef
10.4. Pre-Cure Examination. Immediately after material application, the uncured conformal coating shall be examined for: a. Bubbles and Air Entrapments. These defects shall be broken by vacuum, with a sharp probe, or other appropriate tools. b. Bridg
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