Hi Aleks,
In your case the only reason to do this is if there was copper between the
contacts-never seen that on a design and if it was there why would you be
photo defining up to the edge of the contact? Sounds to me like the old use
gold as the etch resist process. Regards Steve
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Aleks Lozinsky
Sent: June-10-09 4:27 PM
To: [log in to unmask]
Subject: Re: [TN] Immersion Gold versus Electrolytic Gold
Hi Steve,
I think photoresist needed for two main reasons - purpose of electrolytic
gold plating ( its selectivity) and cost of the gold.
Aleks Lozinsky
Technic Canada
----- Original Message -----
From: "Steve Kelly" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, June 10, 2009 4:00 PM
Subject: Re: [TN] Immersion Gold versus Electrolytic Gold
> Hi Rudy,
> We electroplate gold everyday with no photoresist- why would you need a
> photoresist in the electroplate area? Regards Steve Kelly
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of R Sedlak
> Sent: June-10-09 3:19 PM
> To: [log in to unmask]
> Subject: Re: [TN] Immersion Gold versus Electrolytic Gold
>
> Harris:
>
> Perhaps the single biggest difference between electrolytic and immersion
> gold, besides the self-limiting aspect of immersion gold, thus limiting
> thickness, is that immersion gold covers the entire trace, including
> sides. Electrolytic gold must be applied with a photoresist on the board,
> and thus the sides of the traces are exposed Copper.
>
> Electrolytic gold is applied on top of electrolytic Nickel MOST of the
> time,
> there are some people doing direct gold on top of Copper, but it is quite
> thick. Plating Copper under the Nickel is unnecessary.
>
> Rudy Sedlak
> RD Chemical Company
>
> --- On Wed, 6/10/09, Harris Dy <[log in to unmask]> wrote:
>
> From: Harris Dy <[log in to unmask]>
> Subject: [TN] Immersion Gold versus Electrolytic Gold
> To: [log in to unmask]
> Date: Wednesday, June 10, 2009, 10:31 AM
>
> Hi guys,
>
> Can you please help to differentiate the two surface finishes? Also, is
> Electrolytic Gold done in Cu-Ni-Au plating line or there is another way?
>
> Thanks in advance,
> Harris
>
>
>
>
>
>
>
> ---------------------------------------------------
> 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
> -----------------------------------------------------
>
> ---------------------------------------------------
> 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
-----------------------------------------------------
---------------------------------------------------
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
-----------------------------------------------------
|
