Definition from NEMA Spec LI1:-  FR5 has similar properties to FR4 and, in addition FR5 has a high retention of flexural strength at elevated temperatures.  
Geoff Layhe


-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Ofer Cohen
Sent: Tuesday, November 16, 2004 2:32 PM
To: [log in to unmask]
Subject: [TN] FR4 versus FR5


Technetters,

An A-grade question, to allow you all an easy answer: 

While asking for FR4 with high Tg and high Td material I was answered
with data sheet of FR5 material. What is the difference between FR4 and
FR5? Anything to look for? Price differences? Something?

Regards
Ofer Cohen
Manager - Quality, Reliability and Production Technologies
Seabridge - a Siemens company

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
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
-----------------------------------------------------

Private & Confidential:

This e-mail message is confidential and is intended solely for the person or organisation to whom it is addressed.  If the message is received by anyone other than the addressee please return the message to the sender by replying to it and then delete the message from your computer.

 

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
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
-----------------------------------------------------