Electronics Forum | Tue Apr 27 23:10:16 EDT 2010 | mbrunton
I am looking at buying a pick and place machine to assemble the circuit boards we make. Most of the boards are small (2 to 10 square inches), most are 2 sided, and have maybe 20-50 parts per side. I use mostly 0805/0603 chips, SOT-23, SOD-123, SOIC
Electronics Forum | Tue Feb 17 10:07:08 EST 2004 | davef
Bobvsi: A couple of questions for you: * How does adding a low melting point solder to your "regular" [near eutectic] solder increase the speed of removing components? * How does what are the solder alloys that form when using this low temoerature so
Electronics Forum | Tue Mar 06 21:45:36 EST 2007 | Ivan
Our company is also currently using Viromet 347 in our product. Very good, the low melting point do help in my process.
Electronics Forum | Fri Nov 25 14:52:50 EST 2011 | davef
Sn43/Pb43/Bi14 is a low temperature leaded alloy that has been used with very good success. The low melting point helps avoid some thermal shock issues on some assemblies. A word of caution, this alloy forms a low melting point at approximately 95*C.
Electronics Forum | Wed Nov 07 15:01:18 EST 2012 | nikyta
Thanks Dave , my question is about Spopov want to try "Lead Free" SnBi (but uses it on Leaded finishes), but is worry about its low melting point (at this point, no longer 138 degrees as he wrote, but rather in an unknown and unpredictable range bet
Electronics Forum | Sun Sep 23 18:59:59 EDT 2007 | darby
I presume you are looking at low melting point solders. Firstly, I would consider running BOTH sides with the same paste - this will cut down the opportunities for a mix up with rework or retro-fit. Secondly, check that there is a cored wire availabl
Electronics Forum | Mon Sep 27 22:25:05 EDT 2004 | KEN
Minimal cost and low melting point??? Have you bought Indium or Bismuth based alloys lately? Tin/Silver, Tin silver coper-X you name it....there are trade-offs (cost / performance). Not all are exactly published or are suitable for all appliations
Electronics Forum | Mon Sep 27 11:30:05 EDT 2004 | grayman
Your problem is easy. Lead free solder is like 63/37 solder paste when it was started. We make things complicated. We believed before that lead free has high melting temp and will not produce good fellet so on.... The only thing you must do is to lo
Electronics Forum | Tue Aug 16 12:24:56 EDT 2005 | patrickbruneel
Ok Josh if you insist, The directive is under ongoing review and deadlines are pushed further and further. Here's a link to a proposal of 18 new exemptions. http://www.dti.gov.uk/sustainability/weee/RoHS_Regs_Draft_Guidance_August_2005.pdf If you l
Electronics Forum | Mon Apr 03 11:48:31 EDT 2006 | stepheniii
How big are the parts? I've only seen a few parts that ever fell off. Double sided reflow is probably the most common these days The surface tension is powerful. I think the lower limit of temperature is what you would have to worry about with epox
