Folks,

Is there a method of determining the maximum permissible size of two board 
types?
a) A SMT PCB containing Fine pitch QFP devices
b) A SMT PCB containing PBGA 388pin 1.27mm pitch & Fine pitch QFPs

with respect to Bow and Twist.

I am interested in how the thickness of the board relates to maximum bow 
and twist.
I'd like to determine this before I design the layout, rather than find out 
it is wrong
after performing the tests of IPC-6012A,  IPC-TM-650 2.4.22.

Regards,

Colin Weber

* * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* To post a message: mailto:[EMAIL PROTECTED]
*
* To leave this list visit:
* http://www.techservinc.com/protelusers/leave.html
*                      - or email -
* mailto:[EMAIL PROTECTED]?body=leave%20proteledaforum
*
* Contact the list manager:
* mailto:[EMAIL PROTECTED]
*
* Browse or Search previous postings:
* http://www.mail-archive.com/proteledaforum@techservinc.com
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * *

Reply via email to