Electronics Forum: 63/37 solder balance tolerance (Page 1 of 2)

0201 solder beading

Electronics Forum | Fri Sep 21 14:03:45 EDT 2001 | jschake

I have observed solder balling for all aperture sizes tested. Solder balling levels appear to be better correlated against the amount of solder paste that is underneath the 0201 component terminations after placement rather than comparing this to th

flip chip tolerances

Electronics Forum | Fri Jun 01 14:50:29 EDT 2001 | Matt Gormont

I am looking for outline tolerances of a flip chip with a pitch of .25mm. Bumps are made of 63/37 solder. Key tolerances are bump height and positional tolerance of the bumps. Can anyone HELP?

Sn63Pb37 on RoHS compliant PWB

Electronics Forum | Sun Apr 15 18:06:16 EDT 2007 | greg york

You may need slightly longer dwell times and a little more heat in the reflow and wave to ensure proper alloying/wetting. Also consider if you are using a nickel doped and high copper alloy on bare boards in Leaded wave solder bath you will pick up c

Low Melt Solder Chemistry for use in Rework Process

Electronics Forum | Wed Feb 07 13:44:09 EST 2007 | dsoohoo

After some precursory experimentation, I am planing on employing a form of low melting temp solder for use in reworking some very dense, copper core PCB's, both SMT and THT, which were originally mounted with 63/37 solder. The main problem with the

Poor Solderability on TSOPs with Alloy 42 Leadframes

Electronics Forum | Wed Jun 22 09:12:57 EDT 2005 | bsudak

Our manufacturing site has been struggling with soldering Alloy 42 TSOPs. Currently, we have to hand solder in one of our applications. Here are the particulars. Component: 54 leads, Sn plated, 400microinches +/-200. Process: Eutectic 63/37 Sn/Pb

BGA Rework

Electronics Forum | Fri Aug 25 09:12:07 EDT 2006 | russ

When not practical to drill hole into pcb to profile here is what I do and seems to be just fine. place thermo into area underneath BGA and let her rip, you will not be in the ball/solder joint, but the temp difference as long as you are in the arra

Non RoHs Requirement

Electronics Forum | Tue Oct 07 16:19:34 EDT 2008 | mikesewell

If at all possible buy parts with 3% min. lead on the terminations. If this is not an option, "mitigate" whatever the finish is. Typically this means tinning with 63/37 all the exposed lead, not just the solder joint area. Several companies can d

Pb % contaminant allowed in Pb/Free Solder

Electronics Forum | Fri Nov 11 20:41:58 EST 2005 | GS

Thank you Davef, If I am not wrong in understanding, your answer is mainly related to the Legal point of view according to several different Countries who adopted Rohs or equivalent. My question, sorry for my poor English, is mainly related to the

Re: Double sided reflow

Electronics Forum | Fri Feb 13 08:54:43 EST 1998 | justin medernach

| Hi , | I have not been able to find any good description on how to perform double sided reflow on PCBs.The best would of course be to avoid reflowing the bottom side again but in real life this is not possible. | So when double sided reflow sol

Re: Oven Temperature for Solder Reflow

Electronics Forum | Sat Aug 07 11:33:55 EDT 1999 | JohnW

| | What oven temperature should be used to reflow solder (Sn63Pb37) on a PC board (0.075" to 0.100" thickness) in 5 to 10 minutes? | | Profiling - tedious but important. As said, start with the paste manufacturers recomendation which is usually pu

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