TECHNET Archives

March 1998

TechNet@IPC.ORG

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 >>]

Print Reply
Subject:
From:
"McGlaughlin, Jeffrey A" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Sat, 14 Mar 1998 14:20:49 -0500
Content-Type:
text/plain
Parts/Attachments:
text/plain (45 lines)
Tom -

    I don't recommend using polyimide as a standard for the following
reasons:

1.      Cost -- the last time I checked polyimide was 20-50% more than FR-4
2.      Fabricators -- not all fabrication houses can produce polyimide
boards requiring you to qualify more suppliers.
3.      Assembly issues - polyimide seems to require more process control
than FR-4 to achieve the same results ( pre-bake, etc.)

If you need dimensional stability over a wide temperature range, I suggest
you look at G-tek or other tetra-functional FR-4 materials they may be a
better choice.

Jeffrey McGlaughlin
Designer
Battelle Memorial Inst.
 Columbus Ohio

        -----Original Message-----
        From:   Tom Lambert [SMTP:[log in to unmask]]
        Sent:   Friday, March 13, 1998 4:58 PM
        To:     [log in to unmask]
        Subject:        [TN] FR4 vs Polyimide

        >
        >Am trying to decide which to standardize on - would appreciate
info, pros
        >and cons, for each.
        >


################################################################
TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c
################################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body:
To subscribe:   SUBSCRIBE TechNet <your full name>
To unsubscribe:   SIGNOFF TechNet 
################################################################
Please visit IPC web site (http://jefry.ipc.org/forum.htm) for additional information.
For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311
################################################################


ATOM RSS1 RSS2