Electronics Forum | Tue Feb 02 14:42:55 EST 2010 | davef
smt_guy: In removing passivation coats and handling oil, board fabs do light washes with: * Sulfuric acid * Alkaline * Water ... and then blow dry. They do not see "oil" like you seem to be talking about. Their "oil" is the assumption that someone
Electronics Forum | Thu Feb 13 03:49:15 EST 2014 | jlawson
Yes all above is correct, as solder deposits get smaller and mesh T4+ , actual metal to air contact surface area increases , say in contrast to T3, add to this less flux , and flux running away from the joint, re-oxidation and what flux is left, can
Electronics Forum | Tue May 23 20:39:37 EDT 2000 | Dave F
Scott: Sounds like fun: � Solder joint strength in pull/shear varies with lead geometry, solder volume, lead metal/metallization, and the test method. � Among things, IPC-TM-650 talks to getting pads off-of boards. For instance: Method 2.4.8 is for
Electronics Forum | Thu Apr 15 11:56:42 EDT 2004 | patrickbruneel
I would try a PTFE (Teflon) wire or Teflon protected wire or you could try anodized aluminum. Its getting more and more interesting how the lead free era develops. Just a thought I wander how long its going to take the tin (not passivated with lead)
Electronics Forum | Mon Nov 10 09:11:51 EST 2014 | rgduval
The centering jaws are made out of copper, I believe...and conductive. I'd suggest that the conductivity of the copper makes it a fairly poor source of ESD damage in a component. I have observed physical damage to components from the centering jaws
Electronics Forum | Fri Mar 24 18:07:25 EST 2006 | Chris
Flash gold is just thin gold plating over electroless nickel or electrolytic nickel. Flash gold is electrolytic gold where the panel is connected to a plating rectifier and current causes the plating process to occur. Gold thickness is controlled b
Electronics Forum | Fri Jun 18 20:09:52 EDT 1999 | Dean
| Has there anyone bold enough to try this in their shops? My cubemate just got through telling me that at his last shop, they had bare copper boards (no HASL, no OSP, no nothing), with minimal solderability problems. | yes, 8 years ago I developed
Electronics Forum | Thu Jan 14 23:38:34 EST 1999 | Chris G.
| I am experiencing a problem with a surface mount coax connector that over time pulls loose from the PWB. The connector has 4 small gold plated leads and we are soldering it to a flash gold board. A cable plugs into the connector and puts some con
Electronics Forum | Wed Mar 10 17:03:52 EST 1999 | Morziana Hasan
NASA CommQuest Photopolymerized Conducting Polymers Directions: 1.Please read the information provided on this technology. You may follow the links to additional information resources below. 2.After evaluating the technology, please answer the
Electronics Forum | Fri Jan 15 11:40:37 EST 1999 | Bob Willis
| | I am experiencing a problem with a surface mount coax connector that over time pulls loose from the PWB. The connector has 4 small gold plated leads and we are soldering it to a flash gold board. A cable plugs into the connector and puts some c
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