Single sided boards require holes with annular rings for mounting components.

Regards,



Gary Ferrari
Executive Director
IPC Designers Council
(860) 350-9300 Fax (860) 350-9309
[log in to unmask]

>>> "Uptain, George" <[log in to unmask]> 04/15/98 02:14PM >>>
Thanks People;
 But why would one care about annular ring on a non-plated hole?
IPC-D-275 Table 5-11
IPC-2221 Table 9-2

> -----Original Message-----
> From: Richard P. Janda Jr. [SMTP:[log in to unmask]]
> Sent: Wednesday, April 15, 1998 1:00 PM
> To:   DesignerCouncil E-Mail Forum.; Uptain, George
> Subject:      Re: [DC] IPC-T-50
>
> Supported hole is plated.
> Unsupported hole is not plated.
>
> ============================================
>
>
> Uptain, George wrote:
> >
> > Greetings;
> > Would someone with a copy of IPC-T-50 please tell me what the diff
> is
> > between an unsupported hole and a supported hole?
> > Thank you
> >
>
> --
>  ============================================================
> | Richard Paul Felix Janda Jr. |  E-mail  . [log in to unmask]     |
> | CRAY Research/SGI            |  Voice # . (715) 726-5885   |
> | 1168 Industrial Blvd.        |  Fax   # . (715) 726-4345   |
> | Chippewa Falls, WI  54729    |  Office  . HREB  Room 261   |
>  ============================================================

################################################################
DesignerCouncil E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c
################################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in
the body:
To subscribe:   SUBSCRIBE DesignerCouncil <your full name>
To unsubscribe:   SIGNOFF DesignerCouncil
################################################################
Please visit IPC web site (http://jefry.ipc.org/forum.htm) for additional
information.
For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700
ext.311
################################################################

################################################################
DesignerCouncil E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c
################################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body:
To subscribe:   SUBSCRIBE DesignerCouncil <your full name>
To unsubscribe:   SIGNOFF DesignerCouncil
################################################################
Please visit IPC web site (http://jefry.ipc.org/forum.htm) for additional information.
For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311
################################################################