Category:PCB Assembly Solder Paste

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Solder paste is a material used in the manufacture of printed circuit boards to connect surface mount components to pads on the board. It is also possible to solder through hole pin in paste components by print solder paste in/over the holes.

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Search Results: 220 Threads,22 Pages
5 answers
148 views

Paste-in-Hole

I need to know if there are any special component pad designs that need to be considered when evaluating paste-in-hole? We have a few through hole connectors that are good candidates to place pre refl... (See More)

Roberto Ross
2017-02-02 05:21:27
Blake
2017-02-04 05:21:27
5 answers
83 views

gold embrittlement on paste

I discovered that we have some gold plated (30 mico in.) through hole connectors which were Paste In Hole soldered (60 sec at reflow) on a HASL PCB. Do we have an embrittlement reliability issue? The ... (See More)

Augus
2017-02-02 05:13:23
a.boehm
2017-02-04 05:13:23
3 answers
37 views

MQFP soldering issues

I got this MQFP-144 and the soldering looks always very flimsy. I think I use a suitable leaded paste (water-soluble) and the stencil thickness is also OK. The IC on the image looks a bit shifte... (See More)

Fabrizio Restori
2017-02-02 05:08:37
Dana
2017-02-04 05:08:37
5 answers
36 views

solder land analisys

We have been encountering diminishing ball shear readings these past few weeks, despite the fact that we did not change any ball shear tester parameter. Our reflow parameters are also within spec limi... (See More)

madeo
2017-02-02 05:03:33
paolo.costanzi
2017-02-04 05:03:33
3 answers
185 views

Solder mask peel from traces, post wave solder.

Ok, I have an issue that is somewhat uniform in it's recurrence in that it keeps showing up on the same location on the board. The problem area is a group of traces on the exposed side, that keeps hav... (See More)

Bard
2017-02-02 04:28:45
Mario
2017-02-04 04:28:45
4 answers
148 views

Reliability of power module soldering

We always have big power modules on the board,they are very heavy,so we use the screw to fix the soldered module,then we destroyed the solder joints.If we screw them first, the board can't be wave sol... (See More)

Csaba Simon
2017-02-02 04:21:31
adam.yh.lee
2017-02-04 04:21:31
5 answers
203 views

Solder Balls on 0805 capacitors

We've been experiencing solder balls on 0805 caps. We have modified the reflow profile and had some success, but some balling still persists. The balls always form from under the cap between the lands... (See More)

Andy
2017-02-02 03:55:23
julien.brasart
2017-02-04 03:55:23
5 answers
90 views

Wave Solder Immersion Depth

Hey guys, I ran a couple of profile in our wave solder machine using wave optimizer and this is what i got: Parallelism = 0.0 Immersion Depth = 2.1mm to 2.4mm with varying immersion time f... (See More)

Benjamin
2017-02-02 03:24:58
protocad
2017-02-04 03:24:58
5 answers
77 views

voids in solder

I am having problems with voids in our soldering process. I believe it to be the fact that we use a no clean flux without control on how the boards are handled (gloves, procedures, etc.) Does anyone h... (See More)

Beau
2017-02-02 03:22:40
Booth
2017-02-04 03:22:40
5 answers
103 views

No-clean solder paste

The design engineers I work with are blaming some circuit problems on what they think might be related to the no-clean flux residue. (It couldn't be the design.) Has any body else seen noise issues in... (See More)

Carter
2017-02-02 03:20:40
Christopher
2017-02-04 03:20:40
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Search Results: 220 Threads,22 Pages