Electronics Forum | Mon Dec 20 16:34:15 EST 2004 | steve
Customer has tried OA and NC alloy solder pads may be nickel Chromium. Non-wetting issue. Scraping pad alloys a bit of adhesion of solder but no intermettalic bond. Any suggestions?
Electronics Forum | Tue Nov 08 04:11:34 EST 2005 | Eric C
I am trying to find out if there is any solvent for underfill material that has hardened/cured. Regular/routine maintenance of our dispenser units requires thorough cleaning oftentimes scraping is done for material that has hardened. Any inputs would
Electronics Forum | Thu Mar 01 16:03:50 EST 2007 | Brandon
Who removes your HAZMAT bucket waste? We need that too. Yeah it is scraped off the stencil and dryed up. Who removes your dross?
Electronics Forum | Fri May 21 15:36:05 EDT 2010 | ccross
That is exactly the type of problem we are having. Some work, some dont. We feel these parts are not counterfeit so to speak but reworked, removed from other boards, cleaned up to some degree - hence the flux residue, black contamination, scrapes, wr
Electronics Forum | Fri Jul 29 10:03:02 EDT 2011 | blnorman
At a previous location we used the Semco cartridges. Occasionally the operator would have to scrape down the stencil and knead the paste back in. That would keep the paste on the edges from drying out. It was just standard procedure.
Electronics Forum | Wed Jun 19 12:06:20 EDT 2013 | rgduval
We only reapplied in areas where significant wear was observed. As I mentioned, shop chairs moving back and forth, combined with lead trimmings and other debris led to scraping and peeling over time. Other than that, no, we did not re-apply over
Electronics Forum | Mon Jul 29 11:15:05 EDT 2013 | kjs123p
We used to scrape off the paste with a plastic putty knife and then place the boards in our Smart Sonic stencil cleaner that we used to clean the stencils in. It worked well.
Electronics Forum | Thu Sep 24 08:05:59 EDT 2020 | majdi4
In my opinion, it is not possible to eliminate the oxidation in a component because oxidation it is not removable .. the only solution is to apply a mechanical operation (scraping) and then tinning the part..
Electronics Forum | Mon Feb 08 12:06:25 EST 2021 | bobpan
Make sure the pins on the chip on the main display are not bent or tarnished...i have scraped the bottom of the legs before. I would try Reprint in UK. I think they still have parts.
Electronics Forum | Thu Mar 02 15:20:13 EST 2000 | Glenn Robertson
Dave - You certainly have a good point regarding the multiple part numbers and board suppliers, but a rework process for black pad has been reported. See the SMTAI 1999 Proceedings article by Zequn Mei (page 407). It involves flux and solder wi
