Embossing metal mold and manufacturing method thereof

• Main Authors: HORIGOME, SHINKICHI, KATO, KEIZO, ITO, MASARU, SUZUKI, RYO
• Format: Patent
• Language: English; French; German
• Published: 03.06.1992
• Subjects: GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; PERFORMING OPERATIONS; PHYSICS; PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

According to the present invention, etching is used to form a concave and convex pattern corresponding to information (6) an embossing metal mold comprising a conductive layer (1) and a layer which includes an Ni electric-plating layer (2), or an Ni electric-plating layer (2), 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.