Electronics Forum | Thu Sep 24 20:00:59 EDT 1998 | S. Evers
| I'm looking for information on "volcano" soldering or mini-wave soldering. I need to solder a leaded device, thru-hole, on a already populated smt PCB. I want to do localized soldering on the pins of the device. | Any help would be greatly appreci
Electronics Forum | Thu Jun 25 16:13:05 EDT 1998 | Mike McMonagle
I am looking for a little enlightenment with an issue that we have been seeing. We have SMT assemblies with poor solderability on TSOP and mini-QFP type devices. The solder appears to have incomplete reflow and/or grainyness to the joints. Everything
Electronics Forum | Mon May 25 08:57:57 EDT 1998 | Dave F
| Y'all: IPC set-up a site addressing the environmental issues of the printed circuit fabrication industry. Some of it is interesting and applicable to the assembly business as well, even though not aimed directly at assemblers. IPC has recently t
Electronics Forum | Thu Apr 09 18:02:03 EDT 1998 | Ron Beasley
| Has anybody heard of a shield to shield the cutter from | flying leads during hand cutting of through hole components. | If it collected the leads also that would be helpful. | I am thinking of plexiglass or something that the board | could be plac
Electronics Forum | Wed Aug 15 21:56:53 EDT 2001 | hardy boy
Our R&D Guys used to push the lead of a fine pitch component using a Pick or a thin metal tip and if the lead snapped off from the land it's considered failed. Is that the proper way of identifying the solder joint strength? We got problems with sold
Electronics Forum | Fri Sep 07 10:46:23 EDT 2001 | davef
Comments are: * Sn42Bi58 is eutectic at 138�C. Most top-flight paste suppliers will produce it for you. * Bismuth forms an alloy with lead with a melting point of 93�C * Maximum temperature of the solder connection should be less than 100�C during
Electronics Forum | Wed Sep 19 16:02:14 EDT 2001 | fcouture
Pad Metallurgy Used: >Is your question about this targeting the current industry capability of using tin plating technology on such small >pad dimensions? Actually I should have asked for tin/lead plating (HASL) and yes it's to have an idea on capab
Electronics Forum | Fri Dec 07 07:32:39 EST 2001 | smtspecialist
Yes it's a product from SG Chemicals, it does tin the leads but they stay doll, they don't come nice and shinny. So that tells me it doesn't clean off the oxidation it just add a tin coat to the lead itself, short term results are great but what abou
Electronics Forum | Fri Dec 07 09:43:04 EST 2001 | Russ Steiner
I have a mixed technology PCB that has SMT all on bottom, TH parts on both sides (Yes, I realize that's bad. Can't be avoided.) We have designed a 10-up panel, 2 x 5 array. There are 50 leads per bd, 500 per panel. How much time is reasonable to a
Electronics Forum | Mon Jul 07 00:33:12 EDT 2003 | praveen
First we have to look in to the current situiation of the SMT line.Is the pick and place machine very old and can not perform consistently. Is the board to be inspected is very dense and have lots of connectors and fine pitch comp.with lots of 0402 c