# US 8,771,572 B2 · Methods for manufacturing an embosser drum for use in pre-formatting optical tape media > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,771,572 B2 - Document ID: US8771572B2 - Status: Granted - Kind: B2 - Application number: 13/285,730 - Filed: 2011-10-31 - Published: 2013-05-02 - Granted: 2014-07-08 - Earliest claimed: 2011-10-31 - Assignees: Oracle International Corporation - Applicants: Faramarz Mahnad; Joseph J. Kozak - Inventors: Faramarz Mahnad; Joseph J. Kozak - Web page: https://patentgrep.com/patent/US8771572B2 ## CPC - B29D 11/00788: {Producing optical films} - B29C 33/424: {Moulding surfaces provided with means for marking or patterning (for injection moulding B29C45/372)} - B29D 17/005: {Producing optically read record carriers, e.g. optical discs} - G11B 7/263: {Preparing and using a stamper, e.g. pressing or injection molding substrates (production of optical record carriers, e.g. optical discs B29D17/005)} - B29C 59/04: using rollers or endless belts - B29C 59/046: {for layered or coated substantially flat surfaces} - B29C 2059/023: {Microembossing} - B29K 2101/00: Use of unspecified macromolecular compounds as moulding material {(use of unspecified rubbers B29K2021/00)} - B29K 2905/00: Use of metals, their alloys or their compounds, as mould material - G11B 7/24009: Tapes, long films or long sheets - B29D: PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE (making granules B29B9/00; making preforms B29B11/00) - B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) - G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R) - B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS ## Abstract Various embodiments herein include utilities for generating embosser drums that are used to pre-format optical media such as optical tape with a pattern of nanostructures such as wobbled grooves. One utility includes generating a plurality of replicas from an embossing master, bonding the replicas together to form a bonded replica structure having a surface with the nanostructure pattern imprinted therein, creating a replica of the bonded replica structure and electroforming a metallic layer onto the bonded replica structure replica to create a single, one piece, metallic shim which can be used to create a weld-less embosser drum. ## Claims ### Claim 1 A method for use in fabricating an embosser drum, comprising: using an embossing master that includes a surface with a pattern of nanostructures to create an embossing plate that includes a pair of opposing end surfaces and a pair of opposing major surfaces, wherein the embossing plate includes the pattern of nanostructures on a first of the opposing major surfaces; welding the opposing end surfaces of the embossing plate together at a single seam to form a cylinder, wherein an interior surface of the cylinder comprises the first major opposing surface of the embossing plate; producing, using the interior surface of the cylinder, an embosser drum, wherein an outer embossing surface of the embosser drum comprises the pattern of nanostructures, wherein the producing includes applying a metallic layer on the interior surface of the cylinder to produce the embosser drum, and; separating the cylinder from the embosser drum, wherein the separating includes: cutting the cylinder along the single seam; and removing the cylinder from the embosser drum. ### Claim 2 (depends on 1) The method of claim 1, wherein the embosser drum is free of welded seams. ### Claim 3 (depends on 1) The method of claim 1, wherein the applying comprises: electroplating the metallic layer on the interior surface of the cylinder. ### Claim 4 (depends on 1) The method of claim 1, wherein the using comprises: making a plurality of replicas of the embossing master, wherein each of the replicas includes a surface having the pattern of nanostructures; bonding the plurality of embossing master replicas together to create a bonded replica structure including a surface having a pattern of nanostructures thereon, wherein the pattern of nanostructures on the surface of the bonded replica structure comprises the combination of the patterns of nanostructures of the plurality of embossing master replicas; and employing the bonded replica structure to create the embossing plate. ### Claim 5 (depends on 4) The method of claim 4, wherein the employing comprises: producing a replica of the bonded replica structure; and generating the embossing plate from the bonded replica structure replica. ### Claim 6 (depends on 5) The method of claim 5, wherein each embossing master replica includes a pair of opposing end surfaces and a pair of opposing side surfaces, wherein a length of the side surfaces is greater than a length of the end surfaces, and wherein the bonding comprises: bonding first and second embossing master replicas together along respective side surfaces at a first bonding seam. ### Claim 7 (depends on 5) The method of claim 5, wherein the bonded first replica structure comprises a pair of opposing major surfaces, wherein a first of the major surfaces includes the pattern of nanostructures, and wherein the first of the major surfaces comprises a surface area that is at least substantially the same as the outer embossing surface of the embosser drum. ### Claim 8 (depends on 1) An embosser drum for use in pre-formatting optical tape media, wherein the embosser drum is fabricated using the method of claim 1. ### Claim 9 A method, comprising: providing a metallic shim that includes a surface having a pattern of nanometer-scale grooves; interconnecting opposing end surfaces of the metallic shim together at a single seam to form a cylinder, wherein an interior surface of the cylinder comprises the pattern of nanometer-scale grooves; applying a metallic layer to the interior surface of the cylinder to form an embosser drum on the interior surface of the cylinder; and removing the cylinder from the embosser drum, wherein an outer embossing surface of the embosser drum comprises the pattern of nanometer-scale grooves and is free of welded seams, wherein the removing includes: cutting the cylinder along the single seam; and separating the cylinder from the embosser drum. ### Claim 10 (depends on 9) The method of claim 9, wherein the providing comprises: producing a plurality of replicas of an embossing master that has at least one surface with the pattern of nanometer-scale grooves therein, wherein each of the replicas comprises at least one surface with the pattern of nanometer-scale grooves therein; bonding the plurality of replicas together to create a bonded replica structure having a surface with the pattern of nanometer-scale grooves formed therein, wherein the bonded replica structure comprises at least one bonding seam between adjacent embossing master replicas that extends generally parallel to the nanometer-scale grooves; and using the bonded replica structure to create the metallic shim. ### Claim 11 (depends on 10) The method of claim 10, wherein the using comprises: producing a replica of the bonded replica structure, wherein the bonded replica structure replica comprises a surface having the pattern of nanometer-scale grooves therein; and performing an electroforming process on the surface of the bonded replica structure replica to create the metallic shim. ### Claim 12 A method for use in fabricating an embosser drum, comprising: using an embossing master that includes a surface with a pattern of nanostructures to create an embossing plate that includes a pair of opposing end surfaces and a pair of opposing major surfaces, wherein the embossing plate includes the pattern of nanostructures on a first of the opposing major surfaces, and wherein the using includes: making a plurality of replicas of the embossing master, wherein each of the replicas includes a surface having the pattern of nanostructures; bonding the plurality of embossing master replicas together to create a bonded replica structure including a surface having a pattern of nanostructures thereon, wherein the pattern of nanostructures on the surface of the bonded replica structure comprises the combination of the patterns of nanostructures of the plurality of embossing master replicas; producing a replica of the bonded replica structure; and generating the embossing plate from the replica of the bonded replica structure; forming a cylinder with the embossing plate, wherein an interior surface of the cylinder comprises the first major opposing surface of the embossing plate; producing, using the interior surface of the cylinder, an embosser drum, wherein an outer embossing surface of the embosser drum comprises the pattern of nanostructures; and separating the cylinder from the embosser drum, wherein the separating includes: cutting the cylinder; and removing the cylinder from the embosser drum. ### Claim 13 (depends on 12) The method of claim 12, wherein the forming includes: welding the opposing end surfaces of the embossing plate together. ### Claim 14 (depends on 13) The method of claim 13, wherein the opposing ends surfaces are welded together at a single seam. ### Claim 15 (depends on 12) The method of claim 12, wherein each embossing master replica includes a pair of opposing end surfaces and a pair of opposing side surfaces, wherein a length of the side surfaces is greater than a length of the end surfaces, and wherein the bonding comprises: bonding first and second embossing master replicas together along respective side surfaces at a first bonding seam. ### Claim 16 (depends on 12) The method of claim 12, wherein the bonded first replica structure comprises a pair of opposing major surfaces, wherein a first of the major surfaces includes the pattern of nanostructures, and wherein the first of the major surfaces comprises a surface area that is at least substantially the same as the outer embossing surface of the embosser drum. ### Claim 17 (depends on 1) The method of claim 1, wherein the cutting includes severing the cylinder along the single seam.