Electronics Forum | Mon Jun 22 16:33:59 EDT 2020 | davef
Measuring solder static paste viscosity is fairly easy to do. IPC TM-650 .4.34, Solder Paste Viscosity lists the method and equipment. Just don't tell your customer that it is meaningless because the solder paste is printed in shear, not statically
Electronics Forum | Wed Jun 01 07:34:19 EDT 2005 | davef
It's unusual to use a horseshoe shaped pad for a 0805. Commonly when people want to reduce the paste volume to reduce solder balling, they print a "home plate" aperature. We print paste 1:1 with the pad. �IPC-7351 LP Wizard� is the library mainten
Electronics Forum | Thu Apr 15 10:05:26 EDT 2010 | davef
Why not use the same paste volume as you currently use? Alternately, although we haven't used it in a while, doesn't IPC have a very nice paste volume, aperture calculator that could be used for this? Or is it just a pad size calculator used for
Electronics Forum | Thu Jun 01 08:39:36 EDT 2006 | russ
IPC a 610 has this info. An 0402 however mat require more solder than what IPC states (basically evidence of wetted fillet for class2). more paste = more flux = better wetting. Why don't you tell us what pad sizes and layout you have and stencil t
Electronics Forum | Sun May 05 17:27:32 EDT 2013 | davef
Here’s a Tweet that I made here [http://blogs.smtnet.com/smt/smt-placement/ipc-apex-2013-my-tweets/ ] … Hisco’s computer controlled frig for managing solder paste inventory … way more sophisticated than that old white frig. Davef I receive no benefi
Electronics Forum | Wed Jan 17 03:06:56 EST 2001 | George English
You can try : Optimum pad design and solder joint shape for reliability. written for the NPL(England) by Milos Dusek and Chis Hunt, (good ol' English names !!) or of course the IPC guidelines IPC-7525 Regards G
Electronics Forum | Thu May 11 11:25:56 EDT 2017 | davef
Key to Rosin Fluxes [from SUPERIOR FLUX & MFG. CO.] Type R (Rosin): Non-activated rosin flux for soldering copper. Residues are non-corrosive and non-conductive. Type RMA (Rosin Mildly Activated): Mildly activated rosin flux that contains no chlori
Electronics Forum | Tue Jan 16 21:00:11 EST 2001 | davef
Two good sources of information are: 1 IPC-7525 Stencil Design Guidelines 2 SMTnet fine Archives [once the guys get them back up and running after the conversion is complete]
Electronics Forum | Wed Jun 07 09:26:09 EDT 2006 | amol_kane
can you also please tell us the section in IPC-610?...is this in RevD? also, does this also give the solder volume for BGAs? Thanks, Amol
Electronics Forum | Thu Jan 30 01:38:22 EST 2014 | m_imtiaz
thank for good input, any documented standard available from any well known body (IPC standard)
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