 
| Subject: | |
| From: | |
| Reply To: | |
| Date: | Tue, 16 Mar 2010 13:42:17 -0400 |
| Content-Type: | text/plain |
| Parts/Attachments: |
|
|
Is 15\min a shock? 3500 cycle is not much, 3500 shock is a lot. Liquid to liquid.
--------------------------
Sent using BlackBerry
----- Original Message -----
From: TechNet <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
Sent: Tue Mar 16 11:54:46 2010
Subject: [TN] thermo shock cycles
Dear Technos,
we have a customer who recommended 3500 thermoshock cycles -40 to +140°C with 15°C/min gradient. Any ideas/suggestions which PCB material and lead free solder can be used to fulfil this?
As other customers require much less thermo cycles for the same application any hints how to calculate the required thermo cycles out of a mission profile and when the formula for this kind of ALT test does not make any sense (as I think 3500 cycles is normally not reachable for standard PCB material and especially for lead free solder)?
Best thanks in advance,
Torsten
Dipl.Ing.(FH)Torsten Hagge
tech. projectmanager
Kristronics GmbH
Gewerbegrund 5 - 9
24955 Harrislee
Tel.: +49 461 7741 624
Fax: +49 461 7741 642
[log in to unmask]
www.kristronics.de
Gerichtsstand Flensburg, Handelsregister: HRB 1433 FL
Geschäftsführer Dipl.-Ing. oec. Thormod Ohm
Ust-Id-Nr. DE 811182059
Bankverbindung: Deutsche Bank AG Flensburg, Konto-Nr. 4216610, BLZ 21570011
IBAN: DE32 2157 0011 0421 6610 00, BIC: DEUT DE HH 215
______________________________________________________________________
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 15.0
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
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------
---------------------------------------------------------------------
This transmission (including any attachments) may contain confidential information, privileged material (including material protected by the solicitor-client or other applicable privileges), or constitute non-public information. Any use of this information by anyone other than the intended recipient is prohibited. If you have received this transmission in error, please immediately reply to the sender and delete this information from your system. Use, dissemination, distribution, or reproduction of this transmission by unintended recipients is not authorized and may be unlawful.
______________________________________________________________________
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 15.0
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
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------
|
|
|
