Electronics Forum: enig thickness (Page 1 of 12)


Electronics Forum | Mon Jan 03 16:34:10 EST 2005 | davef

The main advantage if ENIG over HASL is that ENIG is flat and HASL generally is not. The main disadvanages to ENIG over HASL are: * Cost of ENIG is 1.5 - 2X higher than HASL * Selflife is less than HASL * You solder to nickel, rather than copper * E

Gold thickness

Electronics Forum | Thu Jul 10 09:16:41 EDT 2008 | aj

Hi all, What should the typical gold thickness be on ENIG boards ? aj...

Gold thickness

Electronics Forum | Tue Jul 15 16:30:57 EDT 2008 | boardhouse

Hi Aj, Recommended Immersion gold thickness would be 3-5 Micro inches over 140 -200 micro inches of Nickel. Thicker Immersion gold than 5 micro inches can cause solder joint embrittlement. Gold readily dissolves in molten solder and will be present

PCB Au thickness

Electronics Forum | Tue Oct 07 02:18:13 EDT 2003 | iman

Hi Experts, Pls help advise what is the expected range of PCB gold thickness over Ni (for ENIG/Electrolytic fabrication processes)? any referrence standards set by the IPC?

PCB Au thickness

Electronics Forum | Tue Oct 07 08:38:05 EDT 2003 | davef

J-STD-001C requires removal of gold from (through-hole) component leads when the thickness of the gold layer is above 2.5 microns to prevent problems with embrittlement. The thickness of gold on an ENIG board typically is around 0.05 micron, resultin

Soldermask color relating to thickness

Electronics Forum | Fri Nov 22 05:04:07 EST 2019 | SMTA-Matthew

We have some circuit boards where the solder mask seems clear instead of green on top of some of the tented via pads. No gold deposited during the ENiG process and no solder sticks to it but why is it clear and does it have any correlation to the thi

ENIG Thickness for Flex

Electronics Forum | Mon Apr 13 09:27:28 EDT 2009 | hxr6038

We had an issue with the finish, PCB manufacturer is telling that they had a problem with the Nickel rework, which resulted in 20% fall out. Please help me by providing the ENIG thickness for Flex boards, is it same as rigid boards as per IPC 4552. I

ENIG Thickness

Electronics Forum | Tue Apr 12 16:55:03 EDT 2005 | russ

I would be afraid of this board supplier, ENIG is self limiting. Russ

ENIG Thickness for Flex

Electronics Forum | Wed Apr 15 13:07:12 EDT 2009 | RHK

Thank you! I am looking into this, but main idea is to use rigid board in place of flex.

ENIG Thickness

Electronics Forum | Tue Apr 12 19:31:39 EDT 2005 | davef

Tell your fab that you'd like your ENIG according to IPC-4552. Just so that you know, IPC-4552 ENIG specification: * Ni thickness: 3 - 6 microns [120 - 240 microinches]. * Au thickness: 0.075 - 0.125 microns [3 - 5 microinches]. * Recommended spec

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