Electronics Forum: stencil (Page 150 of 541)

Fine pitch paste release problems.

Electronics Forum | Fri Dec 20 11:32:51 EST 2002 | D. Adams

Check your stencil apertures making sure they are trapazoidal and smooth. I have hadjobs where the laser stencil was improperly cut (poor laser settings leaving a rough hole even after electropolish. Be sure to specify a .0005 trapazoid in your ste

Stenciling chipbonder.....

Electronics Forum | Fri Jan 24 17:53:42 EST 2003 | razan3

Chipbonder is best applied with a stencil. Too bad on the dispenser purchase. Little hint, use a Kapton Stencil. You can have them laser cut and can get them as thick as you want. Another advantage is the ability to make shapes etc for cleaning

Stencil alignement using the 2 cameras

Electronics Forum | Tue Apr 15 14:10:30 EDT 2003 | russ

here is how it is done. 1.Position the stencil in the machine. 2.Position the board onto the PCB tooling as close to being aligned with the stencil as you can. 3.Place mylar or some thin clear material over the board. your printer should have prov

.5mm BGA

Electronics Forum | Fri Feb 20 13:25:00 EST 2004 | russ

Help! i just rec'd my next job from our marketing people and it has a .5mm pitch BGA 8mmX8mm size. Along with this kit came the stencil. So, I have never placed this fine of a BGA before and I am pretty worried about the stencil releasing the past

Stencil Storage

Electronics Forum | Mon Mar 01 13:09:24 EST 2004 | johnthor

We have also used the IIT Pro Plate II for many years. They sell a small storage cabinet (also overpriced) originally intended for drawing storage where the stencil foils hang in plastic envelopes. Another thing to consider with IIT is their $13 "sk

On contact calibration

Electronics Forum | Wed Jun 09 16:54:24 EDT 2004 | Ralf

Hi all I have a question to all of you who has experiences with Microflex MPM. There are two items: one is on contact calibration and second squeegee pressure calibration. Do i have to if i set PCB make these calibration?. Does Microflex have mechani

Storing non-framed stencils

Electronics Forum | Tue Jun 15 17:00:27 EDT 2004 | Rob

I'll jump on this bandwagon too... A crude method was buying a bread rack and widening it to the width of a fixed stencil. Since we get our foils from A-Laser, we get these card board squares. I would tape three of these pieces together to make a som

Storing non-framed stencils

Electronics Forum | Wed Jun 16 04:14:11 EDT 2004 | loz

I have used this method as well, it did have its drawbacks though. We used to have the positioning holes etched into the stencils and this worked fine, for a while. After a couple of months of opening up and closing the fingers on the hanging rack, w

Solid Solder Deposit

Electronics Forum | Sat Aug 07 17:27:00 EDT 2004 | celldude

We use ssd on all components, from 0201 to very large fine pitch and bga's. With some very small micro bga's , if there is a problem with bridging, we will tape off the stencil during the ssd process and just use bare pads...along with the solder fr

Bump printing with solder paste

Electronics Forum | Thu Aug 19 15:49:05 EDT 2004 | pjc

Hi Erhard, Go to http://www.globalstencil.com They are the stencil firm that worked with MPM for developing technology for printing with thick stencils that are milled out on the bottom to account for existing components on the top side of a PC boa


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