These are my calculations. 1oz x 1 ftsq x 1 insq x 28.3 gr = 1 gr = 30 mg
--- ------ ------- ----- ---- ----
footsq 12 insq 2.54 cmsq 1 oz 32.83cmsq cmsq
Regards,
Ramon
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Jeffrey Bush
Sent: Friday, November 05, 2004 12:35 PM
To: [log in to unmask]
Subject: Re: [TN] copper weight
35 micron is distance not weight - a micron is 1/MM of a millimeter?
Jeffrey Bush
Director, Quality Assurance and Technical Support
76 Technology Drive - POB 1890
Brattleboro, Vermont 05302
802.257.4571.21
http://www.vtcircuits.com
-----Original Message-----
From: Dehoyos, Ramon [mailto:[log in to unmask]]
Sent: Friday, November 05, 2004 10:44 AM
To: [log in to unmask]
Subject: Re: [TN] copper weight
When you say 1 oz = 35 micron do you mean micro Kilograms or
milligrams/cm-E2?
Regards,
Ramon
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Paul Holloway
Sent: Thursday, November 04, 2004 6:56 PM
To: [log in to unmask]
Subject: Re: [TN] copper weight
Hello Joe,
I agree with everything that has been said so far.
The IPC-4101 'Specification for Base Materials for ..."
'Table 2 Copper Foil Weight and Thickness' page 2, gives actual numbers.
IPC-6012 "Qualification and Performance Spec. ..."
'Table 3-7, and Table 3-8', page 14, gives standardized terms.
The German (Deutsche) Part Prints that I have worked with simply state
the
thickness(mm).
(i.e.. '0,035mm Cu')= 0.001,377"Cu= equiv. to 0.0014" (approx.)= 1oz.=
35
micron.
Good luck Joe.
Paul Holloway
Electro-Circuits, Inc.
847-352-5015
-----Original Message-----
From: Joe Spicuzza [mailto:[log in to unmask]]
Sent: Thursday, November 04, 2004 4:02 PM
To: [log in to unmask]
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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