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February 2005

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Subject:
From:
Jeffrey Bush <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Jeffrey Bush <[log in to unmask]>
Date:
Wed, 9 Feb 2005 07:10:46 -0500
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Maximum operating temp is generally 130 C for most /21 materials.  At this temp the board an continuously operate and function electrically and mechanically as designed.  Beyond this performance can become flakey.  



Jeffrey Bush

Director, Quality Assurance and Technical Support



VERMONT CIRCUITS INCORPORATED

  76 Technology Drive – POB 1890

    Brattleboro, Vermont 05302

      Voice: 802.257.4571.21 Fax: 802.257.0011

           http://www.vtcircuits.com

 



-----Original Message-----

From: Şefika ÖZKAL [mailto:[log in to unmask]] 

Sent: Wednesday, February 09, 2005 6:35 AM

To: [log in to unmask]

Subject: [TN] storage temperature of assembled pcbs



Hi,



 



How can we determine the storage temperature of an assembled pcb? 



 



What is the minimum temperature value which a laminate material (fr4 – tg 135˚C ) can tolerate without experiencing any distortion on its construction? 



 



Best Regards



 



Have a good day?



 



Sefika OZKAL 



Design Engineer



 



ASELSAN INC. MGEO Division



 



Address     : Cankiri Yolu 7. Km  



              Akyurt Ankara TURKEY



E-mail      : [log in to unmask]



Tel         : +90 312 84 75 300 Ext: 4698



Fax         : +90 312 84 75 320



 



 



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