Electronics Forum | Thu Jun 29 10:38:04 EDT 2000 | John Thorup
Hello Christopher I don't know if there is any kind of official standard but I can tell you that the HADCO DFM manual specifies a nominal thickness of 50-1500u" with an option for 100-1000u" and the Merix DFM manual specifies 30-200u" Our boards (fro
Electronics Forum | Wed Jun 14 12:43:52 EDT 2000 | Todd Murphy
Dave, you are right you would expect the soldermask to be higher than all SMT pads on the pcb if it is higher on the fine pitch components, but the other areas of the board do not concern me as much as the fine pitch areas. The pads on all the other
Electronics Forum | Sun Sep 12 09:40:04 EDT 1999 | Wayne S.
hello having a problem with one customers bare boards not matching my stencil apertures. i design stencils based on gerber data and reduce up to 15% on some pads. do some board houses reduce pads after receiving gerber data???why would they do that
Electronics Forum | Thu Jun 17 17:26:56 EDT 1999 | wayne sanita
first of all what is the technical term for the small amount of solder on a plated pad. we are getting poor screen printing gasketing on a 20 mil qfp due to this solder not being even or too high in spots and not covering the length of the pads. any
Electronics Forum | Fri Oct 16 11:03:17 EDT 1998 | Michael Allen
We use an "Inert Gas Cabinet" sold by Stanley Storage Systems (800-523-9462). It's similar to a very large tool box (steel cabinet with wide, steel drawers...ours is 59"H x 30"W x 28"D, but they make two smaller sizes). They make it air-tight by we
Electronics Forum | Fri Sep 25 12:53:25 EDT 1998 | Bill Schreiber
Regarding cleaning Chipbonder adhesives from stencils and misprinted PCBs. Check out the Smart Sonic Stencil Cleaning Process at: www.smartsonic.com | | I am looking for anyone out there that has had experience with stenciling with chipbonder adhe
Electronics Forum | Thu May 30 11:12:38 EDT 2002 | robbied
If I get you right and you are looking for a micro stencil for bga rework, then you should try http://www.circuittechctr.com. They are offering a free sample of their Flextac micro stencils in a wide range of sizes. The thing with these ones is that
Electronics Forum | Wed Dec 18 12:04:53 EST 2002 | slthomas
That issue (gasketing is what I usually see it called) was the driving force behind us getting new printers. Our old semi-auto clamshells just weren't repeatable enough, particularly over changes in squeegee travel direction. If the paste in the
Electronics Forum | Mon Apr 28 09:53:10 EDT 2003 | kmorris
I've got a set of apertures on a stencil that I would like to "plug" or block off. In the past we've done this with Kapton tape, but since this location is close to a fine pitch component, the thickness of the tape prevents good gasketing at the fin
Electronics Forum | Thu May 01 13:56:45 EDT 2003 | kmorris
Dave: After the stencil was made with apertures for a connector on this PCB, it was discovered that the connector would have to be handsoldered after SMT reflow. If the solder deposits are left to reflow on the pads, it makes it difficult for the o
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