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Reply To: | TechNet E-Mail Forum. |
Date: | Thu, 22 Mar 2001 10:02:54 -0800 |
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Emily Tse wrote:
> Dear TNers,
>
> My team is trying to carry out an experiment under IPC-TM-650-Test Methods
> Manual (number 2.3.24.1) - a Porosity Testing of Gold Electrodeposited on a
> Nickel Plated Copper Substrate Electrograhpic Method. The test is a bit
> outdated but it seems to fit the best in our evaluation at this stage.
>
> However, one of the materials required for the test is no longer available
> in the market (Kodabromide, glossy finish, single wt. photographic paper,
> fixed before use). From the Kodak webpage, they have suggested another
> replacement of Kodabrome II RC Paper. Yet the paper base has been changed
> from Fiber to RC. Will that change the result of the test?
>
> We would also like to know if there is any amendment on the test (if I have
> missed!) as well as other possible replacement for this particular
> photographic paper.
>
> Looking forward for your kind suggestions!
>
> Best Regards,
>
> Emily Tse
> Process Development Engineering
> ASAT Ltd.
>
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Emily,
You might want to get a copy of ASTM B 741, "Porosity in Gold Coatings on Metal Substrates by
Paper Electrography". I don't have the latest version which I think is -95. My copy of B
741-90 recommends "Kodak Dye Transfer Paper Grade FDW (Catalog No. 1455302)". The ASTM
method also has several technical paper references on porosity testing. I don't believe that
the current IPC-TM-650 test method is under review at this time. It probably should be if we
(IPC) can find a task group with the expertise and is willing to undertake such a review. I
don't personally have experience with this test. Hope this helps.
--
Brian McCrory
Delsen Testing Laboratories, Inc.
1024 Grand Central Ave.
Glendale, CA 91201
Phone: 818 247 4106
FAX: 818 247 4537
email: [log in to unmask]
URL: http://www.delsen.com/
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