Electronics Forum | Mon Jan 26 13:13:07 EST 2009 | rgduval
We've had this same problem with the solder wicking to the component terminations. However, in our case, we did not see the pads turning a silver-white color...rather, they exhibited a tarnishing/darkening of the gold. We determined that we had som
Electronics Forum | Mon Mar 30 11:39:46 EDT 2009 | rgduval
Is this a sample board that you ran without components? If so, I'd get it back to your board house, and ask them to explain to you what's happening. We never did get to a satisfactory root cause on our issue (at least, satisfactory to me). It seem
Electronics Forum | Mon Mar 02 04:20:27 EST 2009 | emmanueldavid
Glossy/Matte & Plating). 2. Select Solder Paste according to Your Customer or In-House Specifications which is compatible for expected Process. 3. Use Chemical Etch / Electro Polished Stencil with proper Aspect Ratios (AR=>1.5) & Area Ratios(ArR=>0.6
Electronics Forum | Tue Feb 17 15:24:17 EST 2009 | glynnhamer
I know this is going to sound rather sad, but we have been using a Capton tape for years that contains silicone to mask large components as they go over the wave, as well as large plated holes on the pcb. It was handed down for years as accepted prac
Electronics Forum | Fri May 29 08:25:13 EDT 2009 | floydf
We are getting what looks like cold solder joints on one of our boards. The boards have an aluminum substrate, and use OSP plating. The solder is lead free - 96.5 Sn, 3.0 Ag, .5 Cu. The flux is no clean. When we first had the problem, my solder profi
Electronics Forum | Tue Nov 03 20:00:47 EST 2009 | davef
Solder Mask Adhesion Pull Test Tape List IPC-TM-650 Test Method 2.4.28.1, Adhesion, Solder Resist (Mask), Tape Test Method, defines the procedure for determining the adhesion of solder resists (masks) used over melting metals, (such as solder plated
Electronics Forum | Mon Nov 09 07:21:02 EST 2009 | CL
Good Morning, I have seen many posts regarding BGA voiding being excessive and what can be done to better the condition. I have a customer that has an assembly that we have had a diufficult time with. We have spent a lot of time debugging the proces
Electronics Forum | Fri Apr 23 17:59:54 EDT 2010 | hegemon
Therein lies the issue. Unknown storage conditions before we received the PCBs, date codes just expired (2 weeks), first article is de-lam city! Had a bad feeling about it. Have read some studies showing that there is no linear tie in of visual cha
Electronics Forum | Tue Jul 06 08:48:11 EDT 2010 | Sean
Hi all, Is anyone used to encounter PTH(plated through hole) crystal component(Not SMT component) become malfunction when the environment humidity is more than 90%? It is happening here...It is very weird that crystal become OK when humidity is bac
Electronics Forum | Fri Aug 20 19:01:26 EDT 2010 | varivenca
VARIVEN,C.A, is a newly emerging company in the electronics field. Variven was established in 2009 to take care of design, repair and maintainance of pcb cards and electronic machinery for oil companies. As of now we are creating basic boards for o
