Electronics Forum | Thu Apr 12 17:34:05 EDT 2007 | carsan
We are running RoHS compliant & non RoHS compliant assemblies. We buy our bare boards from one supplier that only manufactures RoHS compliant boards using a Sn100 finish. Is there any known issues running leaded solder on a Tin finish? Does normal
Electronics Forum | Fri May 18 10:56:09 EDT 2007 | patrickbruneel
Hi smtnetters, I�m looking for reference material preferably graph�s displaying the viscosity and surface tension vs. temperature for standard Sn63 Pb37 alloy. Plenty of reference material is available on pure metals but can�t find anything on the
Electronics Forum | Mon Jul 14 07:49:50 EDT 2008 | edmaya33
Do we really need to follow the IPC J-STD-001 Solder purity? If so, how to effectively balance the chemistry of Sn63/Pb37 other than adding a pure tin on the solder bath? Is this really needed to monitor in monthly basis?How many kgs of pure tin pe
Electronics Forum | Wed Jan 05 17:56:30 EST 2011 | ppcbs
I am looking for a No-clean or water soluble solder paste, Sn63/Pb37 alloy, 15 - 25 microns (T5). I need to print with a 4.8 mil stencil opening. Does anyone know where I can get 250 to 500 grams in one week or less?
Electronics Forum | Wed Sep 07 00:28:04 EDT 2011 | woodsmt
I have identified a Board design issue and having trouble convincing others of my findings. I have a BGA (Sn63 balls, +1500 IO, 0.6mm ball, 1mm pitch, with heat spreader plate)that has a high incidence of solder shorting on the corners. The board i
Electronics Forum | Mon Dec 03 03:58:24 EST 2018 | ameenullakhan
Hi , Observed component drop during second reflow. Component : Image attached Perimeter : 0.15 to 0.025 cm No of leads : 22 Solder Alloy : Sn63/Pb37 As per component adhesion calculation the component should not fall. ( Excel Attached ) Profile
Electronics Forum | Wed Aug 07 01:41:27 EDT 2019 | orbitcoms
Hi I am having trouble getting solder bridges on TQFP-100 (0.5mm pitch) components. The boards are pasted on semi-auto printer using laser-cut 0.12mm stencil and SN63 NC257-2 T4 paste. The components are placed using Samsung CP40LV and tghen reflow
Electronics Forum | Thu Oct 18 18:39:15 EDT 2001 | davef
Responding to your questions ... RELIABILITY OF 1% SILVER SOLDER PASTE: It�s as good as the next solder paste, all other things the same. Look at your back articles by Jennie Hang in SMT magazine. I want to say she wrote an article on the topic i
Electronics Forum | Mon Aug 08 08:18:52 EDT 2005 | davef
Rob We agree with Jason's point about swab lead indicators. You need to be careful interpreting the results. Lead must be in sufficient measurable quantities as found in Sn 63/37 or Sn 60/40 solders. Handheld units are: * Oxford (bought the X-Met
Electronics Forum | Sat Apr 21 14:50:17 EDT 2012 | edmentzer
We are using SN100C in both our wave and selective machines and have very good results. We also using it for ROHS hand soldering. It flows better than SAC305, the joints are shinny just like Sn63/37. We are looking into using SN100C as our paste b
