Homebrew PCBs

----- Original Message ----- 
From: "Mr Crazy" <crazymr420@...>
To: <homebrew_pcbs@yahoogroups.com>
Sent: Thursday, August 16, 2007 7:15 PM
Subject: [Homebrew_PCBs] Riston Plate Master Dry Film


> Hi All,
>
> I am new around here and new to the filed of etching. Though I have tried 
> things with toner transfer and it has worked but I couldn't get rid of pin 
> holes that appear because toner not getting fully transfered. I have tried 
> Toner Transfer thro' Acetate/ Laser Transperancies.
>
> Now, I want to try this with Dupont Riston Plate Master Dry Film. Has 
> anybody used this dry film for making PCB at home?
>
> Are all dry films require same processing? Any experiences, suggestions.
>
> I have gone thro' Dupont datasheet for the film, but since I am not very 
> techie, I didn't understood some stuff, so if anybody has tried, 
> experience will be of great help. 
> (http://www2.dupont.com/Imaging_Materials/en_US/assets/downloads/datasheets/pm200.pdf)
>
> I have found good article about "How to laminate dry film photoresist". 
> (http://www.megauk.com/datasheets/5180_Data_Sheet_Dry_Film_Photoresist_(How_to_Laminate).pdf)
>
> But not sure if it will be same for Dupont Riston. What about exposure, 
> that will also be same as any other dry film. How much power UV light 
> source is required?


Have you tried using pre-coated positive resist boards? If not, get your 
process working properly with those first.

Leon
--
Leon Heller
Amateur radio call-sign  G1HSM
Yaesu FT-817ND transceiver
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leon355@...
http://www.geocities.com/leon_heller