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US 4,610,933 AGranted
Duplication master suitable for the manufacture of electroplated copies
AssigneeU.S. Philips Corporation
InventorRenaat E. Van de Leest
Life of this patent
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Abstract
A master suitable for the manufacture of electroplated negative metal copies. The master comprises a preform which on at least one side has a layer of electroplated aluminum. The surface has a precisely machined profile and is coated with a titanium nitride layer.
Claims4
A duplication master for manufacturing negative copies by electroplating a metal onto a duplication surface of the master, said master consisting essentially of:
- a preform having a surface;
- a layer of electroplated aluminum on the preform surface, said aluminum layer having a shaped surface opposite the preform surface, said shaped surface having a desired profile;
- and
- an outer coating layer on the aluminum layer, said outer coating layer having an exposed surface which is the duplication surface of the master, said outer coating layer consisting essentially of titanium nitride.
1 more element
Dependencies are inferred from the claim text.