Chuck,
0.2 inches is the max I can work with. Anything less would
be fine, as long as it can handle the extremes of the
environment.
The item needed is very crude, I think, compared to what
y'all are doing. I am probably in the wrong forum for this.
If so, perhaps someone can point me in the right direction.
The finished product will be about 0.5 inches wide and 6.0
to 8.0 inches long (by any thickness up to 0.2").
Edge-mounted will be a dozen, to two dozen, LEDs.
Flexibility, long-term weather resistance, and 12vDC are
just about my only specs. It would be a huge plus if it
would retain the curve when bent.
Unfortunately, I don't have enough background in EE to be
much more specific. From the posts I have received since
subscribing yesterday, this group is clearly THE PLACE for
the coolest electronics manufacturing technology. I didn't
know what Polyimide was until yesterday!
Thanks for the help,
Scott
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Chuck
Brummer
Sent: Thursday, November 29, 2001 08:25 AM
To: [log in to unmask]
Subject: Re: [TN] Flexible PC Board
Scott,
0.2 inches is not going to be very flexible. There are
other options like rigid flex,
circuits that are polyimide glass at the ends but have a
flex conection. Can you tell us more
about your needs. How many layers, what weight of copper,
conductor requirements
(line/space)? Maybe someone has some other ideas for you.
Chuck Brummer
"Scott R. Madans" wrote:
> Sorry, the world of mils and microns is new to me. It is
> 0.2 inches!
>
> - Scott
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]]On Behalf Of Chuck
> Brummer
> Sent: Thursday, November 29, 2001 07:58 AM
> To: [log in to unmask]
> Subject: Re: [TN] Flexible PC Board
>
> Scott,
>
> 2/10s of a mil? Like .0002"? You need a dielectric to
hold
> the conductor and I don't think
> you will find anything that thin. We work with thinner
> materials than most and we make a
> number or parts on .0005" polyimide with 3 microns of
> copper. If anyone has anything less
> than that I would like to talk to them.
>
> Chuck Brummer
> Acuson (818)734-4930
>
> "Scott R. Madans" wrote:
>
> > Howdy All,
> >
> > I am new to this list and I thank the folks at 3M's
> > Microflex division for pointing me here. Y'all can
blame
> > them later after reading this lengthily post...
> >
> > The acceptance of my lousy prototype was excellent, so I
> was
> > looking at ideas for a more robust and fine-tuned design
> > using a flexible circuit.
> >
> > I need a flexible PC board operating at 12v DC. Size is
> > about 1/2" x 6" or 8". The mounting is static, but the
> > flexible shape is required because of the variety of
> > mountings. Also, the outdoor environment will be
greasy,
> > dusty, wet, cold (-50F), sunny (UV) and hot (120F). So,
> it
> > needs to be durable. There will be no direct abrasives.
> > The board and protection should be no more than about
> > 2/10ths thick.
> >
> > Is there something like that out there? You've probably
> > seen that "soft-touch" switch rubber used on keypads. A
> > slightly firmer version of that with copper cladding (or
> > something to etch) would be about perfect, as long as
it's
> > tough stuff.
> >
> > Thanks in advance and I appreciate your guidance.
> >
> > - Scott
> > (775) 849-2030
> >
>
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