PCB exposure
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I just received my first batch of positive acting presensitized PCB, and
on the package it says "exposing time only eight minutes under fluorescent
light" does this mean I have to set up my transparency in the dark? Will an
incandescent bulb expose the film? I was under the impression that I needed
a special UV exposure bulb, but this package sounds like any old Fluorescent
will do.
Jeff
on the package it says "exposing time only eight minutes under fluorescent
light" does this mean I have to set up my transparency in the dark? Will an
incandescent bulb expose the film? I was under the impression that I needed
a special UV exposure bulb, but this package sounds like any old Fluorescent
will do.
Jeff
Comments
You may use a standard desktop flourescent lamp, with the lens removed. I
use an F15 model, placed 3 inches above my circuit. I expose for 20 minutes.
The Pre-sensitized board gives times also.
You need not worry about normal room light, while placing your board, and
getting things ready, they dont expose that fast in room light. I do turn
off direct overhead lamps, just to be safe. Dont peal off the plastic film
layer until you are actually ready to develop it. In my room, I have a
single Incandescent lamp that is about 5 feet away from where my circuit is
to be developed and I never had any premature exposures.
Good luck
At 11:49 AM 2/19/2001 -0400, you wrote:
> I just received my first batch of positive acting presensitized PCB, and
>on the package it says "exposing time only eight minutes under fluorescent
>light" does this mean I have to set up my transparency in the dark? Will an
>incandescent bulb expose the film? I was under the impression that I needed
>a special UV exposure bulb, but this package sounds like any old Fluorescent
>will do.
>
>
>Jeff
>
>
>
>
>
Sincerely
Kerry
Admin@M...
WWW server hosting [url=Http://mntnweb.com]Http://mntnweb.com[/url]
Kerry Barlow
p.o. box 21
kirkwood ny
13795
from Kepro. The boards are exposed to UV from a lamp for 60 seconds.
Paul
>
Original Message
> From: Jeff Mitchell [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=2Bf_p7ietKRLzCMw_eEtT8GLKgIll12DVdQ9NeFxKjUFSm1U327sGd9-Ltz_Hywb8v-zJKyjQaCMudHjEA]EL-JEFE@P...[/url
> Sent: Monday, February 19, 2001 8:49 AM
> To: basicstamps@yahoogroups.com
> Subject: [noparse][[/noparse]basicstamps] PCB exposure
>
>
> I just received my first batch of positive acting
> presensitized PCB, and
> on the package it says "exposing time only eight minutes
> under fluorescent
> light" does this mean I have to set up my transparency in the
> dark? Will an
> incandescent bulb expose the film? I was under the
> impression that I needed
> a special UV exposure bulb, but this package sounds like any
> old Fluorescent
> will do.
>
>
> Jeff
>
>
>
>