Electronics Forum | Thu Jan 10 04:06:02 EST 2002 | wbu
Hi Ianchan, you mean you set up a line and wait 6h or 2h to go on with production ? Can�t believe that! Wolfgang
Electronics Forum | Fri Jun 06 13:26:53 EDT 2008 | gdzuber
Pb(N03)2 + H20. In any case I can understand that $38billion spent has done nothing to clean up the Pb legacy. Although the world chose Pb-free as an approach for now, it may change in time. Regards, Gary
Electronics Forum | Thu Oct 09 08:59:42 EDT 2008 | zigmas
Need SW for (old)JOT router: J501-22.1/1 JR10-D3.2H S No. 105611
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 | 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 | Sat Sep 18 06:23:39 EDT 2010 | bandu_shende
We are d2h pcb manufactures. We are having using ST BGA Ics un our pcbs. Can u please confirm how many will be the standard BGA rejection including parts,process etc.For example there must be 1 defect in thousand of two defects in thousand.What is th
Electronics Forum | Wed Dec 05 03:33:22 EST 2007 | longlee
We have done Paste-In-Hole process for 4 years.I think this prcess is suitable for 28-pins connector. Of course, you must assure the connecotr can endure high temperature firstly.Secondly, you need calculate the volume of solder paste, you can refere
Electronics Forum | Wed Jan 19 17:01:18 EST 2000 | Chad Notebaert
You can buy desicant packs and indicator cards to place back in the original or a new bag with the BGA's and re-seal using a heat sealer (Vac Seal being the best). If properly done the material will be kept below the 20% RH level. Another option woul
Electronics Forum | Fri Jan 11 02:07:08 EST 2002 | ianchan
For repeated model runs, we go ahead with the SMT run, whilst the QA does the FA inspection. Limit FA timing to 2h or less...(simple boards yield faster time cycles). For new model runs, yep, we wait for QA to confirm the FA inspection, only with QA
Electronics Forum | Thu Nov 04 04:27:46 EDT 2010 | d0min0
thanks for all the feedback... we also checked, just in case : - bake the components (no visible improvement) - bake the pcb (50% less tombstone components) - finally we changed LF paste to completely different manufacturer - and booom 0 (zero) tombs
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