Electronics Forum | Mon Jun 08 14:19:30 EDT 1998 | Gary Simbulan
Earl, et al, Boy things get old and cold around here fast. I promised more detail on my capactior problem and I thought I could drop something completely different in the same message and tell a tale of solder balls. First the caps. We still have
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 | Mon May 14 09:35:21 EDT 2018 | directx995
Hello everyone, A few days ago I design one special kind of PCB for testing accuracy of our Pick and Place machines. (for trimming, calibrating, NPI etc.) I am looking for adhesive spray, to apply it on PCB (at the moment I'm using double sided tape
Electronics Forum | Mon Apr 17 19:30:27 EDT 2000 | Boca
All of the above is good stuff. To add, I have seen this several times if the assembly is wavesoldered. Heat from the wave can partially reflow the top side SM solder joints and weaken them. To test, check joint strength before wave and then after
Electronics Forum | Sun Jun 07 09:43:11 EDT 1998 | Bob Willis
There are some guidlines on design and through hole reflow on my web site to download. Also on pin in hole reflow the SMTA Office has a document on using the tecnology. | R&D is currently designing a board with smt components on both sides of the bo
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
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 | Tue Jul 18 03:11:48 EDT 2017 | tsvetan
I recently bought: PCB Loader, Full Automatic Printer with vision with 10 seconds print time, 1 meter Inspection Conveyor, Samsung SM482+Feeders, 1 meter Inspection conveyor, Reflow oven for similar budged, all machines new. I bought them directl
Electronics Forum | Mon Dec 16 19:05:57 EST 2002 | davidduke
Steve , I agree with all the responses you have received. Randy Villeneuve is absolutly correct in all of his assesments and I would consider him an expert with the process , Gris is correct about adding a "heat sink" to the process complicating pr
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