Electronics Forum | Mon Dec 22 14:52:18 EST 2008 | wrongway
We run our process like that all the time paste then glue we use same profile as if we were just reflowing paste once in a while we have A plastic bodied part that has that problem we asume it was some mold relase still on the part basicly comtamena
Electronics Forum | Mon Apr 12 19:28:26 EDT 1999 | Tom B
Netters, When I reflow a PCB there is a discoloration of silkscreen and mask. It appears if Profile is too hot! But I dont think so, maybe I'm wrong? 1. Kester 293 no clean 2. 2.1 C/s for 30s to 150 C 3. .5 - .7 C/s for 60s to 185 C 4. 1.5 C/s u
Electronics Forum | Tue May 15 21:57:06 EDT 2001 | davef
Welcome!!! Where the hay ya been??? Sorry bud, were lining-up with your fab [it hurts me to say that, but when yer ] We used to dry pack with desiccants, also. Its probably an old MIL-STD-2073-1C requirement [er something like that]. We qui
Electronics Forum | Fri May 15 21:39:48 EDT 2015 | jlawson
Reflow.. 1.Rehm (Germany) - Best in Class Best overall process stability heating system ( Alot of makers have started to copy there VX heating arrangement ). COnveyor chains can be a bit more attention in terms of maintenance on rehm , but if foll
Electronics Forum | Tue Aug 09 13:25:24 EDT 2005 | pr
From what I can gather, the annular rings are used for grounding when these boards are put in housings. A screw goes through the hole and is torqued down. If there is excess solder on the annular ring, the screw doesn't seat properly. The pallets cov
Electronics Forum | Wed Aug 10 12:05:11 EDT 2005 | Rob
Hi Pr, No idea what the material is - we haven't usd it for a while now, but it was flush & didn't cause any printing problems on double sided reflow. Your board house should know all about it - I would suggest some but ours are all UK or China/Tai
Electronics Forum | Fri Apr 18 14:25:51 EDT 2014 | horchak
what is the technology? Is there fine pitch, double sided, number of layers, lead free? If the pcbs are not of the highest quality you may be set up for failure with no clean process. Couple things to look at is your paste flux content versus medal
Electronics Forum | Thu Aug 18 13:11:39 EDT 2005 | jsloot
We have our board house apply a peel coat mask that can be brushed off after wave or reflow. You need to brush off while it's still warm.
Electronics Forum | Wed Aug 10 11:57:16 EDT 2005 | pr
Is the peelable mask (put on by the boardhouse) flat on the surface of the pcb? If so can you tell me the material name, so maybe I can find a picture? We have to print adhesive on the board, so the mask has to be flat. That is why Kapton from the b
Electronics Forum | Sat Feb 17 14:21:54 EST 2007 | Muhammad Haris
Hi All, I am using YV100Xg YAMAHA Pick and Place Mounter Machine and I am facing a tilting problem of PLCC 84 and QFP 240 pins ICs. I deeply checked about their vision files and place them on the double sided tape and found them ACCURATE on their pad
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