Electronics Forum: dpak voids (Page 1 of 1)

Criteria for thermocouple wire attachment

Electronics Forum | Thu Dec 21 21:37:19 EST 2006 | Jack

Hi Pavel, Real Chunks, Thanks for your valuable inputs..Selecting the correct location for board profiling is critical in determining the solder joint quality. Am I right to say TC wire attachment locations priority should be as below: (1) Thermal

Aperture shape for DPAK

Electronics Forum | Tue Sep 24 10:09:52 EDT 2013 | leigh

Windowpane your ground planes, this will prevent a lot of voiding.

DPAK drop @Second reflow

Electronics Forum | Tue May 31 22:40:24 EDT 2011 | bejrananda

HI All, Please kindly advice me, I have project that it has DPAK part (MPN:SUD25N15-52 E3 Plating:100% Sn matte)which locate on bottom side (1st reflow), Good wetting for 1st reflow.. but .. when I run Top side (2nd reflow).I found that this D

Voids

Electronics Forum | Fri Dec 03 13:29:39 EST 2004 | cyber_wolf

Voids are quite common. You just need to make sure that it is not excessive per your assembly criteria. Take a look at a D-pak under X-ray.

Solder Voids

Electronics Forum | Mon Aug 18 17:15:15 EDT 2008 | jlawson

This can be seen on leaded soldering also as well as LF (worse with LF). To reduce this you can look at your stencil and profile. Printing a cross-hatch deposit can reduce the voiding as it allow gasses to release when in reflow - thats the theory

Vacuum Reflow Oven

Electronics Forum | Thu May 03 17:33:20 EDT 2018 | dleeper

Solder paste selection can have a huge impact on size and quantity of voids. Talk to a few suppliers and ask for their recommendation on low voiding formulas. Pick a few of your top candidates and then perform a DOE to see who has the best result. S

Weak joint strength and black residue

Electronics Forum | Fri Jun 08 17:22:51 EDT 2007 | naynayno

We have been producing an IMS assembly with SMT dpak's for some time. However, we recently encountered a new problem by chance - the parts can be flicked off with a finger nail. I state by chance because the solder joints are wetted and shiny with

D-pak end joint wetting

Electronics Forum | Sun Apr 19 12:54:39 EDT 2020 | davef

A-620G doesn't require 100% wetting to the thermal pad. It requires 100% wetting to the land in the end-joint area. The end joint is the portion of the solder connection that is at the top [or bottom] of the connection. Look at 7.1.3 Solder Joint A

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