Solder Paste Group - Page 17

Group Administrators: 1 | Group Member: 198 | Group Threads: 217

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: 217 Threads，22 Pages Submit Project

3 comments

615 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...(view more)

Fabrizio Restori

2017/2/2 5:08:37

5 comments

628 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...(view more)

madeo

2017/2/2 5:03:33

3 comments

871 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...(view more)

Bard

2017/2/2 4:28:45

4 comments

832 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...(view more)

Csaba Simon

2017/2/2 4:21:31

5 comments

858 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...(view more)

Andy

2017/2/2 3:55:23

5 comments

892 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...(view more)

Benjamin

2017/2/2 3:24:58

5 comments

716 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...(view more)

Beau

2017/2/2 3:22:40

5 comments

714 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...(view more)

Carter

2017/2/2 3:20:40

4 comments

809 views

Board change and solder not adhereing completely

We recently had a multi block panal change at the vendor Now the production lines are producing solderability defects in great number. The makeup of the pcb is a type of fiber glass mask green in colo...(view more)