Well Dewey, even a blind squirrel finds an acorn every now and then.  A 
broken clock is always right twice a day....

Doug Pauls



From:   "Whittaker, Dewey (EHCOE)" <[log in to unmask]>
To:     TechNet E-Mail Forum <[log in to unmask]>, 
"[log in to unmask]" <[log in to unmask]>
Date:   05/09/2013 08:42 AM
Subject:        RE: [TN] Operating temperatures



Doug doing PB laminate speak? What's next; humor?
I have to agree with my esteemed colleague. Laminates that meet 
IPC-4101/26 or 29 would probably work in both those temperature ranges and 
it eliminates the need for polyimide.
Dewey

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Douglas Pauls
Sent: Thursday, May 09, 2013 5:15 AM
To: [log in to unmask]
Subject: Re: [TN] Operating temperatures

A high quality FR4 with a Tg in the 175C range will work for #2, but I 
think you need polyimide to work up to 200C.

Doug Pauls



From:   Pradeep Menon <[log in to unmask]>
To:     <[log in to unmask]>
Date:   05/09/2013 06:09 AM
Subject:        [TN] Operating temperatures
Sent by:        TechNet <[log in to unmask]>



We have a requirement specified in the master drawing of couple of PCBs 
which indicate that the operating temperatures as below.

1.            -50°C to 200°C operating PCB.
2.            -40° to 150°C operating PCB.

Will a high Tg material FR4 meet this requirement. Or will Polyimide be 
required. Any general inputs on this since we could not find the operating 
temperature in the TDS of the materials

Rgds

Pradeep

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