Understood & thanks.

Rich Kraszewski 
Advanced Manufacturing Engineer - KEDS
Phone:  260.925.8919
 
 
 


-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Somtawin
Pornpottanamas
Sent: Thursday, February 05, 2004 8:07 PM
To: [log in to unmask]
Subject: Re: [TN] Goldresidues in non-plated holes


As I know ENIG in plated through hole come from electroless copper
plating. In Electroless copper process it has one step that we call
activator normally will contain Palladium. Sometime after electroless it
still remain some palladium in hole. So when they come through ENIG , as
you know  this process also used palladium before plated Nickel. What
happen is everywhere that has palladium nickel will plated and then
Gold.




Somtawin Pornpottanamas
Material Engineer
Kimball Electronics (Thailand)
Tel. 038-401566  ext. 211
Fax. 038-495029

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of d. terstegge
Sent: Thursday, February 05, 2004 10:13 PM
To: [log in to unmask]
Subject: [TN] Goldresidues in non-plated holes

Hi Technet,

I looked at an ENIG board today and noticed it had some gold-residues in
the nonplated holes. I always thought that a non-plated hole should not
have any plating at all, but seeing this condition for the second time
(the first time was on a board from another manufacturer and another
designer) I almost begin to think this is a normal condition. What do
you think, is this normal, is it acceptable (I don't think so), any idea
what causes it ? For those who like to see a photograph of this, see:
http://www.smtinfo.net/forum/index.php?showtopic=40

Daan Terstegge
Thales Communications
Unclassified mail
Personal Website: http://www.smtinfo.net

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e 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 847-509-9700
ext.5315
-----------------------------------------------------

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e 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
847-509-9700 ext.5315
-----------------------------------------------------

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
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 847-509-9700 ext.5315
-----------------------------------------------------