LISTSERV - TECHNET Archives - LISTSERV.IPC.ORG

TECHNET Archives

March 2010

TechNet@IPC.ORG

	LISTSERV Archives
	TECHNET Home
	TECHNET March 2010

	Log In
	Register

	Subscribe or Unsubscribe

	Search Archives

Options:	Use Monospaced Font Show Text Part by Default Show All Mail Headers
Message:	[<< First] [< Prev] [Next >] [Last >>]
Topic:	[<< First] [< Prev] [Next >] [Last >>]
Author:	[<< First] [< Prev] [Next >] [Last >>]

Subject:	thermo shock cycles
From:	Torsten Hagge <[log in to unmask]>
Reply To:	TechNet E-Mail Forum <[log in to unmask]>, Torsten Hagge <[log in to unmask]>
Date:	Tue, 16 Mar 2010 16:54:46 +0100
Content-Type:	text/plain
Parts/Attachments:	text/plain (43 lines)

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
-----------------------------------------------------

ATOM RSS1 RSS2

LISTSERV.IPC.ORG