Paul,
Generally speaking the board will go thru flash plating (Microns) prior to
prime the
hole before they are placed in the plating tanks for the final plating
process which
should give you a minimum of 1 mil of copper in the holes after all is said
and done.
So adding the  .00072" ( 1/2 oz copper plating up to 1 oz ) plus the flash
plating you should
get roughly 1 mil of copper in the hole.  The vendor can leave the PCBS in
the plating
tanks longer to add cooper but must be careful not to cook the boards to
long where other
problems may arise.

Mike
HiTek National
815-756-8179


-----Original Message-----
From: Paul Noonan <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
Date: Thursday, June 21, 2001 4:35 AM
Subject: [DC] Plating Thickness Again


>Does anyone out there think it would be unreasonable to ask for 1oz, .0014"
>hole plating thickness for multilayer boards? I have been fed so many
>different stories from different board shops, one in particular is saying
>that people only ever ask for 20 Microns, .0008" and that this is adequate
,
>other board shops are telling me that they always provide thicker plating
>than this.
>Any Comments
>
>Paul Noonan
>PCB Designer
>
>---------------------------------------------------------------------------
------
>DesignerCouncil Mail List provided as a free service by IPC using LISTSERV
1.8d
>To unsubscribe, send a message to [log in to unmask] with following text in
>the BODY (NOT the subject field): SIGNOFF DesignerCouncil.
>To set a vacation stop for delivery of DesignerCouncil send: SET
DesignerCouncil NOMAIL
>Search previous postings at: www.ipc.org > On-Line Resources & Databases >
E-mail Archives
>Please visit IPC web site (http://www.ipc.org/html/forum.htm) for
additional
>information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700
ext.5315
>---------------------------------------------------------------------------
------

---------------------------------------------------------------------------------
DesignerCouncil Mail List provided as a free service by IPC using LISTSERV 1.8d
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF DesignerCouncil.
To set a vacation stop for delivery of DesignerCouncil send: SET DesignerCouncil NOMAIL
Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
---------------------------------------------------------------------------------