Electronics Forum | Thu Sep 06 05:23:14 EDT 2018 | netvicher123
In KiCad, in the dialog for generating drill files, there is a checkbox "Merge PTH and NPTH holes into one file."
Electronics Forum | Thu Oct 06 21:46:32 EDT 2016 | piyakorn
am worrying on a hight temp that will affect to others components mounted on board or not such ICs.. Thank you davef -
Electronics Forum | Wed Oct 05 04:32:49 EDT 2016 | piyakorn
Rinse IPA 5 Min --> Treathment/soak IPA50%+SILENT50% 5Min --> Baking 60C/30Min --> Parylene coating (around 8Hr in chamber) --> Found defect spot. We have simulated and ensure board drying before parylene that still have spots. Need help - Thank y
Electronics Forum | Thu Oct 06 12:18:31 EDT 2016 | davef
Looks like moisture bubbling out of the board. I doubt that your baking at 60*C for a half hour is going to do very much to dewet the board. 60*C is warm to the touch, that's it!!! Water boils at 100*C. 60*C is the temperature of a cup of Dunkin. Cr
Electronics Forum | Fri Oct 07 08:48:45 EDT 2016 | davef
Two things ... A friend in the contract coating business said: "... the board is not being baked out long enough, 30 min is certainly not long enough depending on how many layers this board is, as the vacuum (from the parylene process) is pulling t
Electronics Forum | Thu Oct 31 02:43:55 EDT 2013 | hqew2013
The smallest finished hole available for 2 layer board is .020”. The smallest finished hole available for 4+ layer board is .014”. All holes are round and drilled through from top to bottom layer of board. No blind or buried vias. For holes = .15
Electronics Forum | Tue Oct 01 15:48:56 EDT 2002 | lysik
No problem. A standard stencil is OK. You want to print a half moon shape on each side of the hole. Make sure you print about X2 the size of your hole and make sure you keep the print in close to the hole. You want to print X2 the hole size as to hav
Electronics Forum | Mon Aug 18 20:46:08 EDT 2008 | davef
Volume of paste = 2X volume of the hole Questions are: * Why does your customer want the hole filled with solder? * Would materials other than solder be acceptable? * We assume 0.020" is drill size. What is the finished size of the hole? * What is t
Electronics Forum | Fri Apr 19 13:47:00 EDT 2019 | davef
It's a terrible idea. Through holes should be drilled in the exact center of a pad +/-. Have the two holes go out back and settle this. Whichever hole returns, that hole get to keep the pad. The other hole needs to get its own pad. End of story. Th
Electronics Forum | Wed Jul 27 05:31:09 EDT 2022 | lindsaylbb
Aluminum shreds were found inside the tooling hole after depaneling. We ruled out contamination because the tooling holes were covered during depaneling. Out of three holes, only 2 holes with positioning columns inside have aluminum shreds residue.
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