Sender: |
|
X-To: |
|
Date: |
Thu, 19 May 2005 07:52:41 -0400 |
Reply-To: |
|
Subject: |
|
MIME-Version: |
1.0 |
Content-Transfer-Encoding: |
quoted-printable |
Content-Type: |
text/plain; charset="us-ascii" |
From: |
|
Parts/Attachments: |
|
|
FR4 is standard epoxy, where FR5 is modified for Hot-Strength-Retention
and is more suited for higher operating temperatures. It was developed
due to the issues/costs with processing BT and Polyimide years ago.
Avionics used it quite a bit and it was a plug in for MIL shops as your
qual for FR4 extended to FR5 and it processed very similar. With all
the advancements in materials over the past 20 years it has been reduced
in use - mainly we see it only on older drawings that cannot be updated
because no $$$ exists in the contract to implement updates.
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: Baski Devre [mailto:[log in to unmask]]
Sent: Thursday, May 19, 2005 6:41 AM
To: [log in to unmask]
Subject: [TN] FR5
Hello Technetters
Do you know the differences between FR4,FR5 and CEM3. What does FR5
mean?
what are its properties. Can you advice me any web adrdress or data
sheet of
FR5 to compare it FR4 and CEM3?
Thank you for your incomming suggestions
Yusuf GOMEC
Product Quality Engineer
BASKI DEVRE SAN. ve TIC. LTD. STI.
Ceyhan Sk. No:10 81490 Pendik-Istanbul-Turkey
Tel:0090 216 3901036(4 Line)/4836560(4 Line)
Fax:0090 216 3544941/4913269
Gsm:0090 533 6579897/7480014
Internet: www.baskidevre.com.tr
---------------------------------------------------
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
-----------------------------------------------------
---------------------------------------------------
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
-----------------------------------------------------
|
|
|