Joe,

I use the table from IPC6012A, Ammendment 1 (there is just recently a more
current spec, but I haven't purchased it yet; and, I don't think this
would change); it is useful because it has also starting thickness,
minimum, and nominal (reference) thicknesses..

Anyway, just for the Weight in Ounces/Foot conversion, the Thickness in
Microns should be designated as:

3/8 inches = 12 microns
1/2                   17
1.0                   35
2.0                   70
3.0                 105

do not simply use a converter to get to the metric number because you will
come up with a number which is not the "standard" in hard metric
dimensioning; use the numbers from the micron chart above as those are how
the fabricator will order the copper.

Regards,

Valerie





Joe Spicuzza <[log in to unmask]>
Sent by: TechNet <[log in to unmask]>
11/04/2004 05:01 PM
Please respond to TechNet E-Mail Forum; Please respond to Joe Spicuzza


        To:     [log in to unmask]
        cc:
        Subject:        [TN] copper weight


Greetings fellow technetters!
I have a German customer who would like to convert the standard; 1 oz., 2
oz. copper on their drawings into the metric system, specifically microns.
Does anyone know of a conversion table or just the conversion factor one
would use. I'm thinking that say 1 oz./ sq.ft. would become some grams per
micron, but have been told it's not that simple. Help!

Joseph Spicuzza
Production Manager
Millennia Technology, Inc.
1105 Pittsburgh Street
Cheswick, PA 15024
724 274-2222 PHONE
724 274-2235 FAX
[log in to unmask]




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