Electronics Forum | Thu Jan 20 12:10:29 EST 2000 | Dave F
Hany: I have never understood why the add-on boards in PCs have gold plating on their connectors. In the military and in avionics, they require gold on connectors to protect from wear and corrosion. But PCs ave very different. PCs: * Are obsolet
Electronics Forum | Fri Aug 21 07:38:34 EDT 1998 | Tryin'
| | Will somebody please explain HASL (here). Thanks. | Tryin: HASL: Hot Air Solder Leveled. A board fabrication process that applies an oxidation preventing solder coating to copper pads on the board. Dave F You do this to keep the green stuff (
Electronics Forum | Thu Mar 06 22:34:55 EST 2003 | davef
O' Connor: Are you saying that: * You solder fine in the areas where you print paste * You solder poorly in the areas where you don't print paste Aside from that, the gold on these pads seems to be less bright than previous lots. [if that's not it
Electronics Forum | Mon Feb 27 09:31:30 EST 2012 | pauld
Hi Dave, Picture a camera mounted on top of a fixed base that pans 360 deg. back and forth. The motor connects through a circular slip ring board with brush connection. The rings are hard gold and the typical brush material is soft. Unlike the armatu
Electronics Forum | Thu Aug 06 13:09:37 EDT 1998 | Ben Salisbury
| Is there any problem using SMT on gold boards? 15 years ago we were told not to use gold boards, but I can't remember why. Judging by the other postings it now appears to be common. Only problem I see is that the nickel should be plated, not ele
Electronics Forum | Thu Jan 14 22:52:28 EST 1999 | Wayne
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 const
Electronics Forum | Tue Apr 13 09:11:54 EDT 1999 | Dave F
| We process both tin/lead plated boards and gold plated boards in our surface mount group. I have used Sn62/Pb36/Ag2 solder paste on all gold plated boards to help prevent gold scavaging. To reduce the amount of different solder pastes we have to
Electronics Forum | Fri Feb 09 20:05:15 EST 2001 | benefid
The ENIG process will yield between 3-7 micro inches (110 - 275 microns) of gold over the nickel barrier. This thickness range is pretty much the limit as this is a self limiting displacement reaction process. Once all surface nickel ions are repl
Electronics Forum | Thu Dec 24 09:32:53 EST 1998 | Earl Moon
| Anyone ever attach gold bump flip chip to FR4 or Alumina substrates. Am trying to find a solder which is acceptable for use on gold. Am worried about gold imbrittlement since the gold bumps on the flip chip are .004"x.004"x.001" solid gold. The p
Electronics Forum | Wed Feb 07 12:07:34 EST 2001 | stownsend
I know this subject has been beat to death, but I need a clarification. I keep getting mixed messages about how much gold is required on a PCB for a reliable solder joint. Some people are saying 3 - 5 microns, some are saying 3 - 5 micro inches. Do a
