Electronics Forum | Fri May 02 09:49:19 EDT 2003 | tommyg_fla
3NaH2PO3 + H2SO4 + 2H2 + Ni^0 Potassium is co-deposited with the nickel, as follows: H2PO2^- + Hads => H2O + OH^- + P 3H2PO2^- + P => H2PO3^- + H2O + 2OH^- What is Hads?
Electronics Forum | Thu May 31 21:45:48 EDT 2012 | davef
rsthompson ... if you're talking about bare boards IPC-5701, Users Guide for Cleanliness of Unpopulated PBC, Table 8 ||Bare board final surface finish Ions||Hot air solder level||OSP over copper||Gold over nickel Chloride||0.75 ug/cm^2||0.75 ug/cm^2
Electronics Forum | Tue May 06 12:01:47 EDT 2003 | davef
H2PO3^- + H2O + 2OH^-" is not balanced. It should be "3H2PO2^- => H2PO3^- + H2O + 2OH^- + 2P" tommyg_fla I'll respond your question, but I've got alligators up to here, and they're doing what alligators do.
Electronics Forum | Mon Jan 18 12:49:38 EST 2016 | ttheis
The machine is running UPS 3.2.2c on OS/2 2.1.
Electronics Forum | Fri Oct 03 09:00:18 EDT 2003 | davef
EIA standard packages have a variety of L/W proportions. EIA||Dimension mm (LXW)||Proportion (L/W) 0201||0.6X0.3||2 0202||0.5X0.5||1 0303||0.8X0.8||1 0402||1.0X0.5||2 0504||1.25X1.0||1.25 ||1.4X1.4||1 0603||1.6X0.8||2 0805||2.0X1.25||1.6 1111||2.8X2
Electronics Forum | Mon Oct 15 12:42:36 EDT 2001 | davef
I hate getting "roped" into math stuff, but here I go again ... Area of aperture = volume of paste / stencil thickness = {[5000 mil^3] / 5 mil} = 1000 mil^2 Side of the square aperture = Sqrt of the area = [1000 mil^2]^1/2 = 32 mil Diameter of ape
Electronics Forum | Wed Apr 26 07:49:49 EDT 2006 | jemills
No problems with ver 2.2 that I'm aware of. I'm in process eng. and part of my job is review the machine's capabilities. From what i read, Ver 2.3 & 2.4 software was designed to speed up setups and changeovers.I understand the auto teach functions is
Electronics Forum | Tue Sep 09 16:17:45 EDT 2008 | boardhouse
Logannsan, you may want to check into this a little more with your customer to find out what 2 is. It could be as Vlad say's 2Ag -silver, or it could be 2CU -copper or 2Ni- nickel. Also check this form for 62Sn 36Pb 2Ag just my 2 cent. Regards
Electronics Forum | Sun Aug 23 19:20:04 EDT 2020 | admin1020302<i>cece
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Electronics Forum | Tue Apr 25 16:44:12 EDT 2006 | russ
Why do you want to switch?, are you having problems with 2.2 that you know 2.4 will fix?
