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US 8,076,057 B2Granted
Methods of making extrusion dies
AssigneeCorning Incorporated
InventorsMircea Despa, Dale Russell Hess, Kenneth Richard Miller, Christine Marie Share
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Abstract
Methods for making extrusion dies using a LIGA process, a German acronym for lithography (Lithographie), electroplating (Galvanoformung), and molding (Abformung), are described. The resulting extrusion dies can be used, for example, for extrusion of cellular ceramic substrates, precision extrusion of optical fiber or optical fiber precursors, or other applications where profile extrusion requires high dimensional precision and/or has otherwise intricate patterns.
Claims17
A method for making an extrusion die, the method comprising:
- providing a layer of a resist on a hole plate;
- irradiating a pattern on the resist layer that circumscribes an interconnected network of resist;
- developing the resist layer to expose the interconnected network of resist;
- applying a metal layer onto the surface of the hole plate where the resist had been developed to form metal pins;
- and
- removing the interconnected network of resist, resulting in an interconnected series of slots defined by the metal pins to form the extrusion die.
3 more elements
Dependencies are inferred from the claim text.