Electronics Forum: mask and gasping (Page 1 of 13)

mask finish and solder balling

Electronics Forum | Fri Feb 19 14:43:46 EST 1999 | Nithy

We are in the process of getting into no-clean paste and fluxes. One important issue in this is sodler balling. I have heard some people say that having a matte finish would help in having lesser solder balls and that the solder balls would not be

Solder mask materials and equitements wanted

Electronics Forum | Thu Aug 27 21:59:56 EDT 1998 | Xingsheng

Hi, Friends, Could you please recommend me some solder mask materials and equitements for high quality solder mask? Details such as company name, phone numer et al are welcomed. Thanks! Have a good day Xingsheng

kapton dots and liquid solder mask

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.

kapton dots and liquid solder mask

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

kapton dots and liquid solder mask

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.

Conformal coating mask dots and halos

Electronics Forum | Fri Feb 26 10:42:56 EST 2010 | mleber

Your masking dots are a silicone adhesive. Contact the supplier and tell them you need an acrylic adhesive on the same dots. Normally same cost and lead time.

Solder mask and fine pitch devices

Electronics Forum | Tue Jan 15 10:53:18 EST 2013 | boriskilk

We wouldn't advocate extending the soldermask beyond the component body but yes to ganging for fine pitch. To ensure we don't run into issues with flaking our preference is not to add solder mask when the space between pins is less than 6 mil.

Re: mask finish and solder balling

Electronics Forum | Sat Feb 20 09:56:22 EST 1999 | Tufty

| We are in the process of getting into no-clean paste and fluxes. One important issue in this is sodler balling. I have heard some people say that having a matte finish would help in having lesser solder balls and that the solder balls would not b

kapton dots and liquid solder mask

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

Conformal coating mask dots and halos

Electronics Forum | Thu Feb 25 07:37:42 EST 2010 | pcbrown

We are using Humiseal 1B31 and polyester dots for masking. We are spraying this in a Binks sprayer mixed at almost 1:1 with 521 thinner. Whe are seeing the coating creating thin halos around the poly dots as if the dots are "rejecting" the coating. T

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