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 outdated but it seems to fit the best in our evaluation at this stage.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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