excellent. Al oxidizes and is used as gaskets in UHVS.
Inge


----- Original Message ----- 
From: "Kenneth J. Wood" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, July 29, 2011 7:40 PM
Subject: Re: [TN] High Vacuum Substrate


> thanks all...what if I use an aluminum substrate with a ceramic coating?
> Ken
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Inge Hernefjord
> Sent: Friday, July 29, 2011 1:33 PM
> To: [log in to unmask]
> Subject: Re: [TN] High Vacuum Substrate
>
> Ken,
> you can't use organic substrates at 10exp-12 mBar. Use ceramic substrates.
> The organic binder in RO3003 never  stops outgassing.
> . A typical Pyrex glass system may need as much as +400 Centigrade baking
> and one week pumping to achieve 10exp-14, as a comparison.
> All depends on the volume and the gaskets etc. (Maissel & Gang 2:102).
> Inge
>
> On 29 July 2011 15:51, Kenneth J. Wood <[log in to unmask]> wrote:
>
>> Hi all,
>>
>> I have a PCB that operates inside a vacuum chamber under ultra high
> vacuum.
>>
>> The material can't outgas and needs to hold up physically under the
>> pressure
>> (or lack thereof).
>>
>> I wanted to use RO3003 but may need something else, any suggestions?
>>
>> Material lead time is an issue as well which is why I'm looking...
>> Thanks
>>
>> Ken
>>
>> _____________________________________
>>
>> Kenneth J. Wood
>>
>> Saturn PCB Design, Inc.
>>
>> www.saturnpcb.com
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> ______________________________________________________________________
>> This email has been scanned by the MessageLabs Email Security System.
>> For more information please contact helpdesk at x2960 or [log in to unmask]
>> ______________________________________________________________________
>>
>> ---------------------------------------------------
>> Technet Mail List provided as a service by IPC using LISTSERV 16.0
>> 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
>> For additional information, or contact Keach Sasamori at [log in to unmask]
>> or
>> 847-615-7100 ext.2815
>> -----------------------------------------------------
>>
>
>
> ______________________________________________________________________
> This email has been scanned by the MessageLabs Email Security System.
> For more information please contact helpdesk at x2960 or [log in to unmask]
> ______________________________________________________________________
>
> ---------------------------------------------------
> Technet Mail List provided as a service by IPC using LISTSERV 16.0
> 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
> For additional information, or contact Keach Sasamori at [log in to unmask] or
> 847-615-7100 ext.2815
> -----------------------------------------------------
>
>
> ______________________________________________________________________
> This email has been scanned by the MessageLabs Email Security System.
> For more information please contact helpdesk at x2960 or [log in to unmask]
> ______________________________________________________________________
>
> ---------------------------------------------------
> Technet Mail List provided as a service by IPC using LISTSERV 16.0
> 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
> For additional information, or contact Keach Sasamori at [log in to unmask] or
> 847-615-7100 ext.2815
> ----------------------------------------------------- 


______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask] 
______________________________________________________________________

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 16.0
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
For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------