Electronics Forum | Wed Sep 04 14:38:04 EDT 2002 | slthomas
Thank you for not mispronouncing that phrase ala Wayne's World. We here in the Seattle area are sensitive to that stuff, ya know?
Electronics Forum | Tue Sep 10 22:29:01 EDT 2002 | scottefiske
Many times after initially cleaning in the solvents recommended by the paste/material manufacturer, a light white haze may still be visable...try using a soft bristle brush to remove the remaining residues. By this time the residues that remain will
Electronics Forum | Thu Sep 05 03:23:14 EDT 2002 | manic
Hi, I encountered a problem with pbga. One edge either warp downwards or upwards creating bridging or open. This pbga have fr4 at the bottom (compound molding at the top). The fr4 is bigger than the top compound by 3mm at each edge. Pls help. Than
Electronics Forum | Tue Sep 10 08:22:36 EDT 2002 | davef
I doubt that the interposer is FR4, it's more likely to be BT. Warp during reflow is a function of material a reflow recipe. Your ramp is too fast and is causing the interposer to bend like a potato chip.
Electronics Forum | Wed Sep 11 13:20:37 EDT 2002 | stepheno
I've seen this problem caused by the cool down. On a 7 zone oven I made a profile to peak at zone 5 to give some semblance of control to the cool down. The component can develope a big delta T, because of the difference of materials
Electronics Forum | Fri Sep 06 00:29:24 EDT 2002 | TLe
Peter, QC-calc: Verifying vision accuracy of your printer with calibration stencil and hundreds of repeats. If your boards are large and specially if you have finepitch parts on them you will find usefully to use QC-calc to measure board stretch/sh
Electronics Forum | Fri Sep 06 02:07:21 EDT 2002 | jlipton
There seems to be a lot of information related to the benefits of using AOI, but has anyone found more balanced or opposing views? Indeed, has anyone experienced significant problems or issues with AOI machines? Is it really what it's cracked up to b
Electronics Forum | Tue Sep 10 10:40:32 EDT 2002 | genny
Thanks, I appreciate all the responses. I think I have the starting point now. I just have to find the finish line... Regards, Genny
Electronics Forum | Tue Sep 10 11:32:28 EDT 2002 | dragonslayr
Melo- with all due respect, please keep your schilling for customers to some other forum. This is a technical help forum, not an opportunity for a sales pitch.
Electronics Forum | Thu Sep 19 12:02:19 EDT 2002 | JoAnn Stromberg
I think the SMTA could help you. We are offering a number of courses at SMTAI next week in Chicago. They cover topics such as SMT: Principles and Practice and Equipment Selection. All details can be found at http://www.smta.org/smtai.
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