Subject: | |
From: | |
Reply To: | TechNet E-Mail Forum. |
Date: | Wed, 9 Jan 2002 10:15:48 -0500 |
Content-Type: | text/plain |
Parts/Attachments: |
|
|
It is not in the specification. "Normal" undercut varies depending on
methods and materials used in the process of etching. I believe there were
specifications in the now obsolete IPC-D-275. There is some guidance and
discussion of the topic in IPC-2221, and the ammendment.
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]]On Behalf Of Smith, Russell (US
> LA)
> Sent: Tuesday, January 08, 2002 11:41 AM
> To: [log in to unmask]
> Subject: [TN] undercut specification
>
>
> Just a quick brain dead beginning of the year question , Anyone
> know where in the IPC specs ( if it exists) as to what is considered
> acceptable and unacceptable undercut , (or overhang) on etched traces,
>
> Thanks , hope everyone had good holidays and are well!
>
> Russell Smith
> vantico LA
>
> ------------------------------------------------------------------
> ---------------
> Technet 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 Technet
> To temporarily halt delivery of Technet send e-mail to
> [log in to unmask]: SET Technet NOMAIL
> To recieve ONE mailing per day of all the posts: send e-mail to
> [log in to unmask]: SET Technet Digest
> 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
> ------------------------------------------------------------------
> ---------------
>
---------------------------------------------------------------------------------
Technet 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 Technet
To temporarily halt delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL
To recieve ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
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
---------------------------------------------------------------------------------
|
|
|