Susan,
If it is agreed to exclude external layers then your drawing looks fine.
Scott
----- Original Message -----
From: "Susan Mansilla" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, January 31, 2003 4:52 PM
Subject: Re: [IPC-600-6012] Zone Concept


> Mike
> your drawing came out all weird
> here is mine
>
> Susan
>
> -----Original Message-----
> From: IPC-600-6012 Mail Forum [mailto:[log in to unmask]]On Behalf Of
> Mike Hill
> Sent: Friday, January 31, 2003 2:40 PM
> To: [log in to unmask]
> Subject: [IPC-600-6012] Zone Concept
>
>
> All,
>
> I have a zone A/B Question based on the definition of the "end of the
pad":
>
> In the evaluation of thermally stressed sections with ground plans that
> extend from hole to hole (i.e. The internal pads have no end) The entire
> area between holes would be zone A.  Correct?
>
>         Hole 1             Hole 2           Hole 3
>
>
>    ___  _____    ____   _____   _____   ___               COPPER PLANES
ARE
> NOTED BY "___"
>         !       !               !       !               !       !
> ______  _____________   _____________   ___________
>         !       !               !       !               !       !
>         !       !               !       !               !       !
>  _____  _____________   _____________   ___________
>         !       !               !       !               !       !
>         !       !               !       !               !       !
>    ___  ___      ____   ____       ____ ____
>
>
>                 ! Zone A ??     !       ! Zone A ??     !
>
> Mike Hill
> Quality Manager
> Dynamic Details
> Dulles, Virginia
>