Electronics Forum | Mon Aug 16 04:47:04 EDT 1999 | Charles Stringer
| | | One of the DFM suggestions I've seen is to remove the solder mask web, i.e. the mask between pads on 20-mil QFP devices. The rational is that if the mask is thicker than the pad the mask can prevent the stencil from making intimate contact wit
Electronics Forum | Mon Aug 16 04:34:54 EDT 1999 | Earl Moon
| | One of the DFM suggestions I've seen is to remove the solder mask web, i.e. the mask between pads on 20-mil QFP devices. The rational is that if the mask is thicker than the pad the mask can prevent the stencil from making intimate contact with
Electronics Forum | Tue Aug 09 10:38:45 EDT 2005 | SuMoTe
Water soluable dots will wash off after reflow. A water soluable liquid mask will work as well. dots are better for defined (round)holes, whereas the liquid mask works well with odd shapes.
Electronics Forum | Mon Aug 16 16:54:57 EDT 1999 | Scott Cook
| One of the DFM suggestions I've seen is to remove the solder mask web, i.e. the mask between pads on 20-mil QFP devices. The rational is that if the mask is thicker than the pad the mask can prevent the stencil from making intimate contact with th
Electronics Forum | Wed Jan 13 11:21:22 EST 1999 | Patrick O' Herlihy
Can anyone recommend ways of reducing damage to solder masks ... a new wick perhaps. I find that using standard wicks the imposed damage is un-acceptable. Also any good links on the subject of bga rework would be really appreciated in earnest ...
Electronics Forum | Mon Nov 08 12:47:52 EST 2004 | clampron
Good Day Everyone, I have a BGA rework that has some chipped/damaged solder mask that will need to be repaired prior to BGA replacement. I was wondering what materials are being used in the industry for this type of application. Any help would be g
Electronics Forum | Mon Aug 16 07:54:05 EDT 1999 | Peter Barton
| | | | One of the DFM suggestions I've seen is to remove the solder mask web, i.e. the mask between pads on 20-mil QFP devices. The rational is that if the mask is thicker than the pad the mask can prevent the stencil from making intimate contact w
Electronics Forum | Wed Aug 18 21:03:41 EDT 1999 | Dave F
| | | | | One of the DFM suggestions I've seen is to remove the solder mask web, i.e. the mask between pads on 20-mil QFP devices. The rational is that if the mask is thicker than the pad the mask can prevent the stencil from making intimate contact
Electronics Forum | Tue Aug 09 11:56:01 EDT 2005 | Rob
We sometimes use a peelable mask the the PCB manufacturer (board house) adds as part of their process. It may seem an expensive option but avoids: Raising P/o's for tape/peelable mask as consumables booking & inspection Booking out to the shop floo
Electronics Forum | Thu Nov 04 10:29:10 EDT 2010 | 18424
Hello all, Has anyone used Kester 2331-ZX water soluble flux on selective soldering and expirienced a white film after soldering. I have seen this on and off for a few weeks now and believe it is a chemical reaction with the solder mask or improperly
