Electronics Forum: stencil apertures (Page 117 of 121)

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

Re: What cause Solder Wicking ?

Electronics Forum | Thu Aug 27 15:40:50 EDT 1998 | Justin Medernach

| | | | | Hi, | | | | | Does anyone has experiences in reflowing Ceramic BGA and found solder wicking ? Solder wicking has the syndrome that solder being wick from the pad and ended up in the leads. | | | | | We have rule out the possibility of not p

PROBLEMS WHILE GLUE PRINTING

Electronics Forum | Thu Sep 20 20:15:55 EDT 2001 | davef

We use glue for all kinds of purposes. [See, first we glue the lock on the office door. Then, we glue dadour locks on dakah. Next, we glue the ignition of the Benz. Now, webee gon stylin�, uh huh!] Oooops, sorry got lost there for a minute, the

Re: Screen printing the board from........

Electronics Forum | Thu Mar 05 23:33:53 EST 1998 | Ron Costa

| | Hello everyone! | | Does any know anything about bare board size variations? | | Is there a spec. or tolerance? | | I'm running small lots of boards and during the screen printing process | | I find that I cannot paste each board perfectly.I've t

Re: Epoxy printing and wave soldering on 0603 and 0402 components

Electronics Forum | Thu Jul 15 14:38:38 EDT 1999 | JohnW

| | | | | | Hi, | | | | | | | | | | | | I need some urgent informations on stencil design guidelines on how to perform epoxy printing on 0603 and 0402 components. Could anyone help? ( Reflow process is not possible because of some other constriants)

OSP vs HASL

Electronics Forum | Sat May 12 00:04:36 EDT 2001 | zam_bri

The product I'm running currently consist a mix of 20 mil pitch QFP, 50 mil pitch, 0402, BGA and variable size of connectors from small to big, on OSP finished PCB. Running intrusive reflow with a mix packages is a real headache, esplly when you hav

Re: Reflowing a thru-hole part

Electronics Forum | Thu Sep 09 10:09:15 EDT 1999 | John Thorup

| | | 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 don

Re: Cracking Capacitors and Solder Balls

Electronics Forum | Tue Jun 09 07:35:23 EDT 1998 | Steve Gregory

Hi there Gary, Your solder ball problem is very similar the problem I experienced, but I was using a water soluble paste at the time. It started by inspectors telling me that they were seeing cold solder on some SIMM's that we had built regularly. W

Re: Solder Paste from 500 gram tubes.

Electronics Forum | Wed Jul 21 11:49:24 EDT 1999 | Deon Nungaray

| | | | I recently switched from solder paste in 500 gram jars to 500 gram tubes. I did this to try to limit the time the paste is exposed to the room environment. But we have a need to clean the stencil every 4 - 5 boards which means taking the bulk

Re: BGA's - Re-ball -- How thick?

Electronics Forum | Tue May 18 16:24:25 EDT 1999 | Scott McKee

| | | | What is the best way to re-ball a BGA? Who has the best system for doing it? | | | | | | | I'm using our SRT rework stuff to reball in house - when necessary. Of course, we only do this for protos and test boards. We use a standard micro-st


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