Electronics Forum: screen printing in vias (Page 1 of 10)

Re: Information about screen printing

Electronics Forum | Tue Jun 23 11:11:35 EDT 1998 | Russ Miculich

Hi Guys, Don't forget about us. Visit our web site. www.smtech.com for info on printers that compete with DEK and MPM and are newly designed. Contact me via email or give me a call to discuss what it is about screen printing (not stencil printing?

screen printer

Electronics Forum | Tue Mar 02 17:26:24 EST 2004 | pjc

I worked on MicroFlex. All axis move via electric motor drive. Carraige reapatability is +/- 0.0005" (12 micron). Cameras position more easily on linear bearings than the swivel type. The alignment accuracy and repeatability easily supports sub-20mil

Solder in via holes causing printing problems

Electronics Forum | Thu Jan 06 08:03:47 EST 2005 | davef

On solder in vias: It looks like the via are not solder masked well and pick-up solder either: * Solder coating ... OR * During leveling It's possible that the design specifies openings in the solder mask for these via. On solder in the unsupporte

Solder in via holes causing printing problems

Electronics Forum | Thu Jan 06 09:03:57 EST 2005 | russ

It appears that this particular PCB supplier has a non-optimum HASL process along with other issues. It is much harder to completely remove the solder out of vias on thicker boards. Looks like more air pressure was needed to remove all of the exces

Solder in via holes causing printing problems

Electronics Forum | Thu Jan 06 06:15:49 EST 2005 | mattkehoe

We need some opinions about a situation that is causing problems in our process. The pcb's in question are .125 thick with a HASL finish. The boards are coming in with a large amount of solder trapped inside the via holes. Sometimes this solder is ac

01005 (0402 in metric unit) printing accuracy

Electronics Forum | Tue Jul 19 19:10:18 EDT 2005 | chocw

Most of the major chip mounter makers claim that they do have a capability of handling 01005. Like Samsung, Yamaha, Assembleon, Panasonic, etc. But I've never found any screen printer company yet. What is the specification required for selecting scre

Solder in via holes causing printing problems

Electronics Forum | Thu Jan 06 16:11:07 EST 2005 | Chunks

It appears your board house is having a problem with the solder resist (mask). From the couple pix it appear that the holes are being plugged by the mask, so your HASL is not able to be blown out during the hot knife process. Time to call your boar

solder paste printing

Electronics Forum | Fri Mar 29 10:11:02 EDT 2019 | cyber_wolf

“For a number of years now, work has been proceeding in order to bring perfection to the crudely conceived idea of a transmission that would not only supply inverse reactive current for use in unilateral phase detractors, but would also be capable of

Re: Screen printing glue for wave soldering SMT components.

Electronics Forum | Fri May 26 05:54:40 EDT 2000 | Sal

For the past year now we have been printing adhesive with no real problems. Our printing ranges from 0603's to SOIC using a variation of aperture sizes and metal thickness foils. The crucial parameters are : aperture sizes : These obviously depend o

Re: problem in micro-BGA assembly

Electronics Forum | Thu Jun 24 15:44:12 EDT 1999 | Earl Moon

| | Dear guys, | | | | I have some problem on assembling micro-BGA with solder paste (63/37). The micro-BGA we assmeble is 0.75mm pitch and with 45 pin (solder bump is 96.5/3.5Ag). The stencil is a laser-cut stencil with 5 mil thickness. We are no

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