Electronics Forum: pth voids (Page 1 of 4)

Solder voids in PTH

Electronics Forum | Sun Aug 19 15:34:20 EDT 2007 | davef

What are you trying to do: * Improve hole fill? * Reduce PTH voiding? Hole fill: Search the fine SMTnet Archives for stuff like: http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=36063 PTH voiding: Ideally, there are no voids. We're unawar

Solder voids in PTH

Electronics Forum | Tue Feb 19 22:50:00 EST 2008 | amarpreet41

Do you of reducing hole size of DIMM connector will improve solder voids??

Solder voids in PTH

Electronics Forum | Wed Feb 20 07:31:59 EST 2008 | davef

We'd go with the formula above.

Solder voids in PTH

Electronics Forum | Sat Aug 18 11:23:10 EDT 2007 | Learn From U

Hi All, Via X-rays, we found solder voids appear on PTH location, especially on Dimm connectors area. We think this should be related to PCB issue as we found solder unable to fill up the PTH hole during bare board testing at wave soldering machi

Solder voids in PTH

Electronics Forum | Wed May 06 04:31:42 EDT 2009 | radzi

We have prob Solder voids for Connector, Micro D. We used HMP solder wire and pcb thickness is 0.093".

Solder voids in PTH

Electronics Forum | Tue Feb 19 22:57:38 EST 2008 | davef

Duno. What's the diameter of: * Finished connector lead * Finished through hole We reckon: Lead size plus ~0.25mm [0.010"] is normal.

Solder voids in PTH

Electronics Forum | Tue Feb 19 23:00:29 EST 2008 | amarpreet41

Connector pin - 10.83 mils Hole dia - 27 - 33 mils. We are trying to find the optimam level for hole dia.

Solder voids in PTH

Electronics Forum | Wed Feb 20 09:05:38 EST 2008 | tonyamenson

We had a similar problem with lead-free through-hole components. We baked those baords to remove the residual moisture and everything went to 100% pass - defect was gone. Couldnt hurt to try a sample run while you decide if the PCB holes need to be

Solder voids in PTH

Electronics Forum | Wed Feb 20 09:29:19 EST 2008 | mun4o

ni, I had similar problem too.I bake PCB in SW mashine - about 8h ,T=90 C.Problem is in the base material of PCB - there are moisture in the material.After my complaint to PCB factory , they change material and the problem disappear.

Solder voids in PTH

Electronics Forum | Wed Feb 20 12:22:14 EST 2008 | tonyamenson

iv40, I don't suppose you know/remember what base material you were using that caused the problem and what material you switched to was, do you? We just pre-bake all our lead free PCBs as a precuation but I would like to remove the process if I can

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