Electronics Forum | Mon Aug 16 04:34:54 EDT 1999 | Earl Moon
| | One of the DFM suggestions I've seen is to remove the solder mask web, i.e. the mask between pads on 20-mil QFP devices. The rational is that if the mask is thicker than the pad the mask can prevent the stencil from making intimate contact with
Electronics Forum | Fri Mar 11 12:30:51 EST 2011 | palletman
We have sucessfully built pallets for several customers with fine pitch connectors. By adding a unique insert of titanium webing we eliminated solder bridging and still obtained proper hole fill. Some examples are shown at http://www.mf-mfg.com.
Electronics Forum | Mon Aug 16 07:54:05 EDT 1999 | Peter Barton
| | | | One of the DFM suggestions I've seen is to remove the solder mask web, i.e. the mask between pads on 20-mil QFP devices. The rational is that if the mask is thicker than the pad the mask can prevent the stencil from making intimate contact w
Electronics Forum | Wed Aug 18 21:03:41 EDT 1999 | Dave F
| | | | | One of the DFM suggestions I've seen is to remove the solder mask web, i.e. the mask between pads on 20-mil QFP devices. The rational is that if the mask is thicker than the pad the mask can prevent the stencil from making intimate contact
Electronics Forum | Tue Sep 18 16:48:55 EDT 2001 | jschake
Why do you think that assembling the BGA, QFP, and fine pitch parts will solve your bridging problem? I would think doing this may cause you more grief by having these more massive components being reflowed upside down fall off during the second pas
Electronics Forum | Thu Mar 03 14:05:49 EST 2011 | davef
Certainly the bridge is ugly, but the voiding is nothing that you should be bragging about either. Pretty ugly work. BRIDGING: If all of your shorts appear in the vacinity of the heat sink, consider reducing the amount of paste that you apply there.
Electronics Forum | Tue Jun 08 14:16:49 EDT 1999 | Dave F
| | Hi,my master | | How to iron out such soldering bridge with below conditions: | | 1.The component(Harness)lead pitch is 2.0mm,the lead length is 3.2mm. | | 2.PCB width is 1.6mm.Pad size is 1.65mm.Its a single copper PCB | | 3.using spraying fl
Electronics Forum | Fri Sep 07 17:38:23 EDT 2007 | bentigano
Hello James. I've got a YesTech YTV-2050 system at work with one top-down camera, and 1 side-view camera for each of the four sides. I do have the side view cameras being used for automated side inspection. There are some parts with markings that are
Electronics Forum | Sun Feb 10 20:27:50 EST 2008 | jmelson
As long as it doesn't have a thermal pad soldered under the package, it shouldn't be a big problem. Small, pointed iron, stereo zoom microscope if you can find one, or a head-mounted magnifier. Lots of light. Rest the heel of your hand on the boar
Electronics Forum | Mon Sep 28 10:12:53 EDT 1998 | Chrys
| Hello, | I need some users information about "Air knif" in wave soldering: | 1. Does it decreases bridging ? | 2. Is it self installed of a purchesed kit (if purchesed, who are the recomended vendors) ? | 3. Any other information about the issue. |
