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
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
Electronics Forum | Tue Apr 12 16:55:03 EDT 2005 | russ
I would be afraid of this board supplier, ENIG is self limiting. Russ
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.
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
Electronics Forum | Tue Apr 12 12:13:52 EDT 2005 | John S
We are moving into fine pitch components. 64 pin QFPs and the like. We've chosen an ENIG pcb finish to help with flatness of the pads, but the pcb vendor has asked for a thickness specification. Can anyone provide a recommendation? It seems like
Electronics Forum | Mon Apr 13 23:02:52 EDT 2009 | davef
Use IPC-4552 for your ENIG thickness. Typically, ENIG has nickel deposit with medium [7-9 percent by weight] phosphorus content. That's what fabs do on rigid boards. On a flex with medium-P and IPC-4552 specified ENIG, you could see brittleness and
Electronics Forum | Mon Mar 05 22:42:30 EST 2007 | davef
On your ENIG thickness requirements, search the fine SMTnet Archives for previous discussions, like: http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=33661 On determining if your board will solder properly: ANSI/J-STD-003, Solderability Te
Electronics Forum | Tue May 11 08:20:52 EDT 2021 | jineshjpr
Hi Anyone having IPC 4552 A ?? Can You please provide the details of Immersion Gold Thickness Recommendations mentioned in Page 21 & Additional details required for Immersion Gold Thicker Than Specification by Design mentioned in page 23.
Electronics Forum | Thu Jul 10 09:16:41 EDT 2008 | aj
Hi all, What should the typical gold thickness be on ENIG boards ? aj...
