Electronics Forum: aperture shape (Page 6 of 16)

Squeegee angles

Electronics Forum | Thu Mar 16 10:04:41 EST 2006 | slthomas

"better gasketing, less dog-earing" I suppose gasketing could contribute but my assumption is that it's a function of better shearing action between the blade edge and the aperture wall. You get a more consistent shape on the top of the paste deposi

Re: Reflowing a thru-hole part

Electronics Forum | Wed Sep 08 21:36:14 EDT 1999 | kyung sam park

| I have a board that has surface mount on both sides . On this board is a 22pin connector which is the only thru-hole part.This part is located on the component side. I would like to reflow this part. Can this be done? If so, how can this be done?

Re: Reflowing a thru-hole part

Electronics Forum | Wed Sep 08 22:48:27 EDT 1999 | armin

| | I have a board that has surface mount on both sides . On this board is a 22pin connector which is the only thru-hole part.This part is located on the component side. I would like to reflow this part. Can this be done? If so, how can this be done?

Re: Reflowing a thru-hole part

Electronics Forum | Wed Sep 08 22:49:38 EDT 1999 | Jason Tomlinson

| | I have a board that has surface mount on both sides . On this board is a 22pin connector which is the only thru-hole part.This part is located on the component side. I would like to reflow this part. Can this be done? If so, how can this be done?

Re: Solder Beading Solder Balling

Electronics Forum | Sat Aug 07 11:47:47 EDT 1999 | JohnW

| | | | | | | | | | | | Hello, | | | If you are using no-clean and they are entrapped in the flux it is also IPC accepted but i havent found a customer yet who agrees with that. Im sure you have checked your profile. I had the same problem with chi

Reliability of U-shape appetures

Electronics Forum | Wed Jul 03 10:30:48 EDT 2002 | davef

First, it's difficult to image anyone [that's fallen off the turnip truck more than once] saying 'there is absolutly no problem' about anything in our business. Second, I have never heard of this �U� shaped 0402 aperture thing. [As someone mentione

672 PBGA on PC Card .015 thick pcb

Electronics Forum | Tue Oct 09 20:27:13 EDT 2001 | davef

That�s a 672 BALL BGA, bud!!! It�s a BIG Mutha!!! [I know. I know. For some reason suppliers call balls "pins".] Let�s focus on: * Clarifying the units on your PCB and aluminum plate thickness measurements. * Describing your use of the aluminum pl

SOLDER BALLS

Electronics Forum | Wed Apr 29 08:24:55 EDT 2009 | davef

Commonly when we see solder balling, we think "too much paste." As a result, we pinch the apertures or change the shape to a "home plate." We don't think that's what's going on here. But what if this component has a thicker solder plating on its ter

0402 Adhesive Screen Printing

Electronics Forum | Tue Apr 01 11:18:47 EST 2003 | cyber_wolf

Is anyone out there successfully screen-printing SMD adhesive on an 0402 layout? We have successfully done 0603 and larger, but the deposition consistency on the 0402's is just not there. We don't always get enough epoxy on the board. We have tried a

Re: paste release from stencil, and volume calculation

Electronics Forum | Tue Nov 09 17:12:38 EST 1999 | Dave F

Steve: Addressing your points: 1 FINE PITCH APERTURES Electropolishing Laser Cut Stencils: Laser cut should not requiring polishing. Geesh, how much money do you have for stencils? ;-) Oval Shaped Apertures: Pass. What do you expect to gain f


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