Ioan,

We have been bonding with heavywire Al wire to ENIG type a) hundreds of
thousands boards, works perfectly.

Au ball/wedge fine wire won't work with 6S confidence on any of a) or b)
because the gold is too thin.


http://www.empf.org/empfasis/2007/June07/wedge.html



Inge

-----Ursprungligt meddelande-----
Från: TechNet [mailto:[log in to unmask]] För Ioan Tempea
Skickat: den 7 mars 2008 14:06
Till: [log in to unmask]
Ämne: [TN] Bonding on ENIG

Hi Technos,

 

A connector has to be bonded on 2 mil wide traces. Is ENIG suited as a
surface finish for bonding? If yes, why, if not, why and if it depends, why?

 

Or otherwise said, I have a PCB that will get some SMT parts on both sides
and then a couple hundred golden fingers will see bonding. I was presented
with 2 options for the PCB finish:

a) Immersion Gold : 0.03um Au over 3um Ni over 25±10um Cu

b) ElectroBonding Gold: 0.3um Au over 3um Ni over 25±10um Cu

 

Which one is to prefer?

 

Thank you,

 

Ioan


---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16
for additional information, or contact Keach Sasamori at [log in to unmask] or
847-615-7100 ext.2815
-----------------------------------------------------

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------