Electronics Forum | Tue Dec 29 12:18:17 EST 1998 | Ryan Jennens
| | I have been working on this process for a couple of weeks and I know that there are a few other companies in Europe and Japan who are also playing. | | | | Is there any one who has been running this process in production ? | | | | Yes I do mean
Electronics Forum | Thu Feb 21 16:57:02 EST 2008 | flipit
If the vias are large and don't always tent, you can have your pcb supplier double mask the pcb. I do this for COB assembly sometimes because the globtop wicks through the vias and also causes air bubbles in the globtop.
Electronics Forum | Mon Sep 03 06:05:54 EDT 2012 | amitsindwani
Is it a good idea to clean a paste-printed PCB when some printing defect comes and reprinting it ? Or can it be double-printed ?
Electronics Forum | Thu Jan 15 08:39:26 EST 2004 | Patrick
Thanks for the reply, I do know that the HASL finish is "domed " on opposite sides of a QFP site & "smooth" on the other two sides. (ie. Sides 1 & 3 are domed, & sides 2 & 4 are smooth ) depending on the direction the PCB was extracted from sol
Electronics Forum | Fri Aug 13 10:19:35 EDT 1999 | Boca
| | We are using a mixed technology process with mostly through-hole parts plus some SMT IC's on the component side and some passive SMT parts on the solder side. We do not have a proper wave soldering machine for doing solder side SMT (double wave
Electronics Forum | Mon May 18 11:39:30 EDT 1998 | Earl Moon
| | We had some failures on an IC package that the manufacturer has put down to moisture inside the package, leading to popcorning. | | This seems a bit odd, the package is a PLCC 84 which is quite thick. I have only seen this problem on thin package
Electronics Forum | Tue Feb 24 13:22:10 EST 2009 | pcbrookie
Hi All, Pretty new here, and to the industry and doing my best to learn what I can. Sorry if this topic has been discussed extensively, but I couldn't seem to find it via a forum search. Our company recently purchased a 7-zone reflow oven to repla
Electronics Forum | Sat May 27 02:52:20 EDT 2006 | TimS
Gentlemen I have managed to pull myself together after banging my head. I am not sure the flux volume is the total solution here. All spray processes deposit flux in a similar manner, that is to say the vast majority of material sprayed onto the PCB
Electronics Forum | Sat Jun 01 01:15:52 EDT 2019 | dhanish
Thanks Steve.The bent we are seeing is at the location without any component .It is a small and long pcb,one side fully loaded with component .Thebother side got no component. We can manually bend the pcb at the side without the component. All the la
Electronics Forum | Fri Feb 09 16:11:31 EST 2007 | MAC
Not an expert on PCB manufacture, but it looks like mask from other side of PCB flowed through vias before this side was masked. Is it possible previous vendor masked this side first, or used film-type mask which would not flow through?
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