Electronics Forum: plating (Page 76 of 252)

HASL on Pads

Electronics Forum | Mon Jun 14 22:49:46 EDT 2004 | Ken

Um...I would reject those boards. skip plating is a process indicator...a bad indicator. IF your building to class 3...I would get the rep in ASAP and reject the lot.

Ni/Sn plated parts

Electronics Forum | Tue Jun 15 08:22:39 EDT 2004 | jsmith01

The parts are dated Mar 20 2004. My profile hits a peek of around 232-240c and is above 225 for around 30 seconds.

Ni/Sn plated parts

Electronics Forum | Tue Jun 15 11:08:02 EDT 2004 | russ

Well take away the easy answers! How are the parts falling off? Is the joint breaking the termination on the part or is it breaking at the solder to termination interface? Also, how long are these parts in liquidous state? and what type of paste a

Ni/Sn plated parts

Electronics Forum | Wed Jun 16 20:36:42 EDT 2004 | russ

Well I am clueless! I have a lead free build coming up and I am going to check to see if our parts do the same thing. I will let you know. Russ

HASL Plating Thickness

Electronics Forum | Tue Jul 27 07:18:44 EDT 2004 | Nippy

How does the HASL finish and stencil match ? I have seen ocasions on fine pitch devices where the HASL can protrude into the stencil aperture either pulling paste down on the snap off or completely blocking the aperture and getting no paste.

Matte tin finish

Electronics Forum | Wed Aug 04 16:49:24 EDT 2004 | jim_bob

Regarding Lead Free component finishes, vendors are zeroing in on matte tin plating as the finish of choice. What test are performed, to determine if a finish is "matte" type (vs. non-matte)?

Plating Thickness at Via Hole

Electronics Forum | Thu Aug 05 20:40:13 EDT 2004 | Haran

Is 1 thou of copper refer to 1 mil or 1 mm.?In Asia,we do not really use this unit.Please advise.

Plating Thickness at Via Hole

Electronics Forum | Thu Aug 05 20:42:11 EDT 2004 | Andrew

If the moisture does not has path to escape,what will happen to the entrapped moisture ,will there be a problem in the asssembly process?

Plating Thickness at Via Hole

Electronics Forum | Thu Aug 05 21:17:24 EDT 2004 | davef

A 'thou' is a 'mil'. It's intended use to to distinguish 'mil' from 'milli' [obviously with marginal success].

Plating Thickness at Via Hole

Electronics Forum | Thu Aug 05 21:20:40 EDT 2004 | davef

The entrapped moisture WILL escape. You just want to assure it is not through your PTH and via. Hopefully your board is constructed such that the alternate escape path for the moisture does not delaminate the board.


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