To further the discussion about 35N, I was at a place where we were running
some .018" thick teflon RF boards. The process involved placing the built
boards (very carefully) into their respective chassis assemblies, screwing
them down, and running the entire assembly through an IR oven at an unreal
high temp to overcome the heatsinking of the aluminum chassis. I bought
some FR4 and had it cut into sheets of around 7"x7" and a silhouette of the
boards with negative radii at the corners to ease removal after reflow.
This worked great except the FR4 would warp after two or three runs. I then
bought some 35N and repeated the process. This worked tons better due to
the lower z-expansion and higher Tg of the material. I bought 4 or 5 3'x6'
sheets and, boy, was it expensive!!!! I do remember the machine shop that
did the cutting telling me that the material was destroying their bits :)

Jason Gregory





ME Magnin <[log in to unmask]>@ipc.org> on 02/10/2003 09:01:24 AM

Please respond to [log in to unmask]

Sent by:    TechNet <[log in to unmask]>


To:    [log in to unmask]
cc:

Subject:    Re: [TN] Arlon board


Thanks to Google, found:

http://www.arlon-med.com/35N.pdf
http://www.bairnco.com/anrep99/engineeredmaterialsandcomponents(arlon).pdf

Hope it will help
Best regards

Marie Magnin
QA Manager
FIRSTEC SA
Rue du Grand Pré 70
CH 1211 Genève 2

Tél.   : +41(0)22 918 36 85
Fax   : +41(0)22 918 36 93
mailto:[log in to unmask]
http://www.firstec.ch


> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]]On Behalf Of Jason W. Gregory
> Sent: lundi, 10. février 2003 15:21
> To: [log in to unmask]
> Subject: Re: [TN] Arlon board
>
>
> Bret,
>
> I purchased some Arlon 35N about 4 or 5 years ago. I was using it as
> panelizing material to run some odd shaped boards. My belief
> was that I had
> gotten some of the last available. I had heard that was some
> carcinogenic
> concern with the 35N. I don't know for sure though.
>
> Jason Gregory
> SMT Production Supervisor
> LaBarge Inc.
> (918)459-2367
> (918)459-2221 fax
> [log in to unmask]
>
>
>
>
>
> "Adair, Bret" <[log in to unmask]>@ipc.org> on
> 02/07/2003 01:37:52
> PM
>
> Please respond to "TechNet E-Mail Forum." <[log in to unmask]>;
> Please respond
>        to "Adair, Bret" <[log in to unmask]>
>
> Sent by:    TechNet <[log in to unmask]>
>
>
> To:    [log in to unmask]
> cc:
>
> Subject:    [TN] Arlon board
>
>
>
>
> Anyone know if there is a fabricator that stocks Arlon's 35N polyimide
> glass?
>
> Bret
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