Electronics Forum | Wed Jul 20 02:48:43 EDT 2005 | grantp
Hi, What's really interesting about your photos is there is solder paste on top of the component. If it was blowing the solder off the board you would see solder paste splatter away from the component. But the solder paste is on top of the compon
Electronics Forum | Fri Dec 16 03:47:46 EST 2005 | gpaelmo
Anyone have problems wave soldering white tin finish? We are an ems and our customer provides us the pcb's. SMT and TH components on the board. SMT is fine but when we wave solder, wetting to top side is very poor (solder only flows half way up). We
Electronics Forum | Tue Jan 24 07:43:45 EST 2006 | Chunks
Q: If you do not use a selective wave pallet does this not leave the possibility of solder flowing up thru the Via's on the board? A: No. Your board house can cover your vias with solder resist. Your board house can plug the vias. You can cover t
Electronics Forum | Thu May 18 20:42:36 EDT 2006 | davef
Hypothesis #1: We agree with Steve. You are probably seeing the nickel underplate. The gold was absorbed into the solder in portions of a second, so that you don't see it is not surprising. We're guessing that the gold was porous and allowed the n
Electronics Forum | Wed Jun 21 13:25:16 EDT 2006 | muse95
I see what you're saying - I'm not a process guru by any means. I was going on the premise that SAC melts at a higher temperature than SnPb. Basically I think of it as a BGA is joining solder to solder, unlike an SOIC where it is tinned metal lead t
Electronics Forum | Thu Sep 07 16:50:44 EDT 2006 | greg york
Just reading these comments are really interesting but very baffling. That if the solder manufacturers produces solder which 'is' actually Virgin high quality material and treated with conventional metallic anti drossing agents AND continue to add th
Electronics Forum | Sat Jan 13 03:43:38 EST 2007 | Stephen- SMT engineer trainee
We are now using solder paste(OM325) and I have some problems on the folowing process: 1. We use the solder paste softer(Malcom SP-1) to warm-up for 20 mins, when it just take from refrigerator. Is there any problems for solderpaste performance? 2.
Electronics Forum | Tue Jan 30 09:26:59 EST 2007 | CK Flip
I think most people don't "get" soldering, and advocate the "more-is-better" approach as if solder were duct tape - you know...the more duct tape you put on something the stronger the bond. Such is NOT the case with soldering. People don't "get" that
Electronics Forum | Mon Jan 29 10:11:12 EST 2007 | muse95
What does your customer want you to do? I would not want a CM soldering one of my boards with leadfree paste if I didn't ask him to. Whatever you do, get approval first. Two things to consider: If the other components are not rated for leadfree tem
Electronics Forum | Mon Mar 05 16:16:08 EST 2007 | Mark
Hello, We are having issue with one of the customer board. This is 10 layer PCB FR4 with black solder mask. Coating Ni/Au. Soldering leadfree. We are using 7 zones air reflow oven (zones top&bottom). We have bed solder flowing for this boards. T
.gif)
