Electronics Forum | Fri Mar 03 08:25:29 EST 2006 | azbvc
MELF shape works perfect for me.
Electronics Forum | Fri Feb 16 18:08:33 EST 2007 | davef
IPC-4554 Specification for Immersion Tin Plating for Printed Circuit Boards
Electronics Forum | Wed Feb 01 17:59:44 EST 2012 | gaz
Thanks very much everyone. I'll try out a 5mil and see how that goes.
Electronics Forum | Tue Feb 14 21:05:45 EST 2012 | isd_jwendell
What is the percent solids of the paste you are using?
Electronics Forum | Thu Feb 16 13:08:13 EST 2012 | gaz
Is that the "general metal loading" spec? We are using AIM ws400 sac305, so 88.5%.
Electronics Forum | Fri Jul 11 08:17:22 EDT 2008 | aj
Hi Dave, Yes that is correct. I had a XRF carried out on some boards that I am having solderability issues on and the report came back with 0.04um - 0.05um as the measured gold thickness. Previous batches that went through fine measured 0.07-0.11u
Electronics Forum | Wed Oct 01 22:15:36 EDT 2003 | davef
Tough to say. It depends on the type of solder mask, the producer of the solder mask, and your board fabricators' process. As one angle on this, solder mask type affects thickness. Minimum clearance: * Liquid photoimageable: 2 thou * Screened liq
Electronics Forum | Mon Oct 06 12:37:18 EDT 2003 | ramanandkini
It was a nice discussion. What I did here was a thermal shock test 1 hour@ +90 deg.c and immediately 1 hour @ -40 deg.c. The second test I did was a high humudity test for a week. After each test, I carried out a peel test with scotch tape. Those bo
Electronics Forum | Mon Feb 19 17:34:02 EST 2007 | GS
Thank You Pavel and Dave, Unfortunately I do not have IPC-4554. Anyway I 0.6-1.0umm is what I remember, and confirmed by reading also through leterature available on google. I was just going to understand if it possible to obtain more thickness
Electronics Forum | Thu Oct 02 17:54:46 EDT 2003 | davef
Yes, Russ IPC-6012A w A#1 - Qualification & Performance For Rigid Printed Boards talks to solder mask requirements in 3.8. One interpretation of what it says: * Solder resist [solder mask] must meet the qualification / conformance requirements of S
