Electronics Forum | Fri Apr 12 16:30:21 EDT 2002 | stepheno
If you are going to wavesolder the board after SMT you will have to epoxy the parts on instead of paste/reflow. I used to work for a company that squeeged it on. You will have to research component layout guidelines if you do want to wavesolder. If
Electronics Forum | Sat Jun 04 01:32:09 EDT 2005 | adlsmt
Has anyone tried to use electrically condctive adhesive rather than solder to connect the leads on 5 watt Luxeon parts? If you design the board right to dissipate heat, when you have a bunch of them in a tight array, even with thermal relief on the t
Electronics Forum | Wed Sep 20 19:43:06 EDT 2000 | Dave F
Some RF components are made in copper in weird spiral and parallel strip-line shapes. I'd either: * Send the boards back to where ever you got them and tell that bird brain to use SM-782 pads and practices. ... OR * Get the bird brain that sent you
Electronics Forum | Mon Apr 21 10:59:39 EDT 2008 | davef
That you have 'grainy' solder only at the ends of the connector and not at all solder connections indicates that your quality types are on track and are pointing you in a direction worthy of investigation and developing a better understanding of the
Electronics Forum | Mon May 24 04:05:04 EDT 1999 | Charles Stringer
Can anyone steer me towards a supplier of heatsinks suitable for use on a PQFP 160. Before you shoot me down in flames, I know that I am not going to get much heat away from the die because of the plastic but the application is such that the board te
Electronics Forum | Fri Apr 18 11:38:50 EDT 2008 | sueph
I have a small board with some chips and 2 connectors (1 large and 1 small) with gull wing leads. The large connector has some "disturbed" solder joints per my QA people. These joints are toward the ends of the connector, not toward the middle. Th
Electronics Forum | Mon Apr 21 11:55:29 EDT 2008 | realchunks
"Disturbed" usually means some form of movement. I would think your leads are moving due to warp as the board exits the reflow zone. Not knowing your profile, I would suggest checking your profile. Make sure you have adequate "above liquidous" and
Electronics Forum | Tue Sep 01 14:11:27 EDT 1998 | Matt
How would you mount a surface mount chip onto Perf board? I am doing a project for school and one of the chips is a surface mount, but everything else fits in Perf board. Any suggestions? Thanks
Electronics Forum | Wed Jul 15 13:33:56 EDT 1998 | Don Welling
I am looking for information on the amount of stress a component sees during the depaneling process. I am currently specifying a new piece of depaneling equipment and I have not found any studies that quantitatively compare the amount of stress diff
Electronics Forum | Mon May 24 10:17:54 EDT 1999 | john thorup
| Can anyone steer me towards a supplier of heatsinks suitable for use on a PQFP 160. Before you shoot me down in flames, I know that I am not going to get much heat away from the die because of the plastic but the application is such that the board
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