Embossing metal hold

Details Embossing metal hold Embossing metal hold

1991-11-27

1994-08-16

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Preform reshaping or resizing means: or vulcanizing means...

Surface deformation means only

156634, 156664, 264106, 264293, 264344, 425394, 425810, 430323, B29C 5900, B29D 1700

Patent

active

053381785

ABSTRACT:
According to the present invention, etching is used to form a concave and convex pattern corresponding to information on an embossing metal mold comprising a conductive layer and a layer which includes an Ni electric-plating layer, or an Ni electric-plating layer, so that the surface of the embossing metal mold will not be contaminated even if processing conditions are somewhat changed, and that the mold will have less defects. Thus, optical disk substrates of high quality can be produced. Besides, time required for manufacturing a stamper can be shortened.

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