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 | Mon Jun 21 09:58:25 EDT 1999 | Christopher Cross
| | Now don't everyone jump on this at once, but it seems time for me to send out copies of my not even close to being dated copy of an article about HASL. Though it was published in 1992, in Printed Circuit Fabrication Magazine, and it got rave revi
Electronics Forum | Sat May 12 00:04:36 EDT 2001 | zam_bri
The product I'm running currently consist a mix of 20 mil pitch QFP, 50 mil pitch, 0402, BGA and variable size of connectors from small to big, on OSP finished PCB. Running intrusive reflow with a mix packages is a real headache, esplly when you hav
Electronics Forum | Wed Aug 22 22:22:52 EDT 2001 | davef
First an administrative point, you can edit the postings that you make on SMTnet. Look for the yellowish-greenish EDIT button at the top of your posting. Second there are over 170 postings on intermetallic* on the fine SMTnet Production Forum Archi
Electronics Forum | Wed Jan 16 15:22:29 EST 2002 | Terry Burnette
In his book titled "Manufacturing Techniques for Surface Mount Assemblies" author R.J. Klein Wassink describes the relationship between solder land dimensions, component lead coplanarity, board warpage, solder volumes, and solder paste flux wetting b
Electronics Forum | Wed Apr 28 12:48:02 EDT 1999 | Justin Medernach
| | | We use Immersion Gold (AuNi) for our 20 mil pitch and BGA boards. | | | Lately, we have been having solderability problems with boards with this surface from some of our suppliers. | | | | | | We are considering trying boards with White Tin so
Electronics Forum | Tue Aug 31 12:42:45 EDT 1999 | Charles Barker
****************************************** ***************** HELP! *************** ****************************************** We are having a special ceramic smt board made. The boards are 16-up arrays that have smt pads on both sides. Only thre
Electronics Forum | Mon Mar 08 09:03:17 EST 2004 | russ
Is this problem really related to the size of the BGA OR the size/thickness of the PCB? Would I be correct in assuming that your pre-heater is small in size? Usually a board warps like this when the ramp is to great at the localized area. the imme
Electronics Forum | Fri Jul 13 09:27:15 EDT 2007 | losersk8er
Sorry I have just started working in this industry so I am not as familiar with everything. The probelm is with the Product shorting because of small pieces of metal stretching accross two leads of an IC. This could be a result of faulty equipment?
Electronics Forum | Wed Nov 05 18:39:06 EST 2008 | joeherz
Hello, We have recently installed a selective soldering machine and are seeing some voiding/cratering in random locations. We have done some basic experimenting with fluxing parameters, preheat and dwell times but haven't been able to eliminate it.
