LISTSERV - TECHNET Archives - LISTSERV.IPC.ORG

TECHNET Archives

September 2003

TechNet@IPC.ORG

	LISTSERV Archives
	TECHNET Home
	TECHNET September 2003

	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:	Re: FR-4
From:	Geoff Layhe <[log in to unmask]>
Reply To:	TechNet E-Mail Forum.
Date:	Wed, 10 Sep 2003 17:34:02 +0100
Content-Type:	text/plain
Parts/Attachments:	text/plain (57 lines)

FR4 comes from NEMA (National Electrical Manufacturers Association) grading.

FR = Flame resistance  4 = Epoxy/Glass

FR1 & FR2 are phenolic/paper
FR3 = Epoxy/Paper
FR5 = Epoxy/Glass high retention of flexural strength at elevated temps

Geoff Layhe


-----Original Message-----
From: Ezequiel Cruz [mailto:[log in to unmask]]
Sent: Wednesday, September 10, 2003 4:38 PM
To: [log in to unmask]
Subject: [TN] FR-4


Can anyone tell me what the FR-4 acronym stands for?
I know what the material is per IPC 4101, but what does the FR and the
number 4 stand for?

Thanks techies.

Ezequiel

---------------------------------------------------
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
847-509-9700 ext.5315
-----------------------------------------------------


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 847-509-9700 ext.5315
-----------------------------------------------------

ATOM RSS1 RSS2

LISTSERV.IPC.ORG