Patents by Inventor Donald J. Kerfeld
Donald J. Kerfeld has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8705334Abstract: Data storage replica disks having a surface relief pattern with replica lands and replica grooves are provided.Type: GrantFiled: October 28, 2013Date of Patent: April 22, 2014Assignee: Legger Col. A.B. LLCInventors: Jathan D. Edwards, Donald J. Kerfeld
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Publication number: 20140056120Abstract: Data storage replica disks having a surface relief pattern with replica lands and replica grooves are provided.Type: ApplicationFiled: October 28, 2013Publication date: February 27, 2014Applicant: Legger Col. A. B. LLCInventors: Jathan D. Edwards, Donald J. Kerfeld
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Patent number: 8593931Abstract: Data storage replica disks having a surface relief pattern with replica lands and replica grooves are provided.Type: GrantFiled: December 28, 2012Date of Patent: November 26, 2013Assignee: Legger Col. A.B. LLCInventors: Jathan D. Edwards, Donald J. Kerfeld
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Patent number: 8363534Abstract: A data storage master disk and method of making a data storage master disk. The data storage disk master is for use in a data storage disk replication process. The data storage disk molding processes produces replica disks having a surface relief pattern with replica lands and replica grooves. The method includes providing a master substrate. The master substrate is at least partially covered with a layer of photosensitive material. A surface relief pattern having master lands and master grooves is recorded in the data storage disk master, including the steps of exposing and developing the photosensitive material is controlled to form master grooves extending down to a substrate interface between the master substrate and the layer of photosensitive material, such that the width of the master grooves at the substrate interface corresponds to a desired width of the replica lands.Type: GrantFiled: April 19, 2011Date of Patent: January 29, 2013Assignee: Legger Col. A.B. LLCInventors: Jathan D. Edwards, Donald J. Kerfeld
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Publication number: 20110223369Abstract: A data storage master disk and method of making a data storage master disk. The data storage disk master is for use in a data storage disk replication process. The data storage disk molding processes produces replica disks having a surface relief pattern with replica lands and replica grooves. The method includes providing a master substrate. The master substrate is at least partially covered with a layer of photosensitive material. A surface relief pattern having master lands and master grooves is recorded in the data storage disk master, including the steps of exposing and developing the photosensitive material is controlled to form master grooves extending down to a substrate interface between the master substrate and the layer of photosensitive material, such that the width of the master grooves at the substrate interface corresponds to a desired width of the replica lands.Type: ApplicationFiled: April 19, 2011Publication date: September 15, 2011Applicant: Imation Corp.Inventors: Jathan D. Edwards, Donald J. Kerfeld
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Patent number: 7952986Abstract: A data storage master disk and method of making a data storage master disk. The data storage disk master is for use in a data storage disk replication process. The data storage disk molding processes produces replica disks having a surface relief pattern with replica lands and replica grooves. The method includes providing a master substrate. The master substrate is at least partially covered with a layer of photosensitive material. A surface relief pattern having master lands and master grooves is recorded in the data storage disk master, including the steps of exposing and developing the photosensitive material is controlled to form master grooves extending down to a substrate interface between the master substrate and the layer of photosensitive material, such that the width of the master grooves at the substrate interface corresponds to a desired width of the replica lands.Type: GrantFiled: August 6, 2010Date of Patent: May 31, 2011Assignee: Imation Corp.Inventors: Jathan D. Edwards, Donald J. Kerfeld
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Publication number: 20100297382Abstract: A data storage master disk and method of making a data storage master disk. The data storage disk master is for use in a data storage disk replication process. The data storage disk molding processes produces replica disks having a surface relief pattern with replica lands and replica grooves. The method includes providing a master substrate. The master substrate is at least partially covered with a layer of photosensitive material. A surface relief pattern having master lands and master grooves is recorded in the data storage disk master, including the steps of exposing and developing the photosensitive material is controlled to form master grooves extending down to a substrate interface between the master substrate and the layer of photosensitive material, such that the width of the master grooves at the substrate interface corresponds to a desired width of the replica lands.Type: ApplicationFiled: August 6, 2010Publication date: November 25, 2010Applicant: Imation Corp.Inventors: Jathan D. Edwards, Donald J. Kerfeld
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Patent number: 7801016Abstract: A data storage master disk and method of making a data storage master disk. The data storage disk master is for use in a data storage disk replication process. The data storage disk molding processes produces replica disks having a surface relief pattern with replica lands and replica grooves. The method includes providing a master substrate. The master substrate is at least partially covered with a layer of photosensitive material. A surface relief pattern having master lands and master grooves is recorded in the data storage disk master, including the steps of exposing and developing the photosensitive material is controlled to form master grooves extending down to a substrate interface between the master substrate and the layer of photosensitive material, such that the width of the master grooves at the substrate interface corresponds to a desired width of the replica lands.Type: GrantFiled: September 4, 2009Date of Patent: September 21, 2010Assignee: Imation Corp.Inventors: Jathan D. Edwards, Donald J. Kerfeld
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Publication number: 20100067360Abstract: A data storage master disk and method of making a data storage master disk. The data storage disk master is for use in a data storage disk replication process. The data storage disk molding processes produces replica disks having a surface relief pattern with replica lands and replica grooves. The method includes providing a master substrate. The master substrate is at least partially covered with a layer of photosensitive material. A surface relief pattern having master lands and master grooves is recorded in the data storage disk master, including the steps of exposing and developing the photosensitive material is controlled to form master grooves extending down to a substrate interface between the master substrate and the layer of photosensitive material, such that the width of the master grooves at the substrate interface corresponds to a desired width of the replica lands.Type: ApplicationFiled: September 4, 2009Publication date: March 18, 2010Inventors: Jathan D. Edwards, Donald J. Kerfeld
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Patent number: 7600992Abstract: A date storage master disk and method of making a data storage master disk. The data storage disk master is for use in a data storage disk replication process. The data storage disk molding processes produces replica disks having a surface relief pattern with replica lands and replica grooves. The method includes providing a master substrate. The master substrate is at least partially covered with a layer of photosensitive material. A surface relief pattern having master lands and master grooves is recorded in the data storage disk master, including the steps of exposing and developing the photosensitive material is controlled to form master grooves extending down to a substrate interface between the master substrate and the layer of photosensitive material, such that the width of the master grooves at the substrate interface corresponds to a desired width of the replica lands.Type: GrantFiled: March 2, 2004Date of Patent: October 13, 2009Assignee: Imation Corp.Inventors: Jathan D. Edwards, Donald J. Kerfeld
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Patent number: 7352685Abstract: A data storage master disk and method of making a data storage master disk. The data storage disk master is for use in a data storage disk replication process. The data storage disk molding processes produces replica disks having a surface relief pattern with replica lands and replica grooves. The method includes providing a master substrate. The master substrate is at least partially covered with a layer of photosensitive material. A surface relief pattern having master lands and master grooves is recorded in the data storage disk master, including the steps of exposing and developing the photosensitive material. The exposing and developing of a specified thickness of photosensitive material is controlled to form master grooves extending down to a substrate interface between the master substrate and the layer of photosensitive material, such that the width of the master grooves at the substrate interface corresponds to a desired width of the replica lands.Type: GrantFiled: March 2, 2004Date of Patent: April 1, 2008Assignee: Imation Corp.Inventors: Jathan D. Edwards, Donald J. Kerfeld
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Patent number: 7114947Abstract: An optical disk exhibiting no detrimental thickness increase (edge wedge effect) that arises at the outer diameter of an optical disk substrate during an injection molding manufacturing process, and an apparatus and method for making such a disk. The optical disk of the present invention is designed for use with an optical disk player, especially where the data on the optical disk is stored air incident. This optical disk includes a disk substrate made from a molded polymeric material. The disk substrate has a first major surface, a second major surface, and an outer edge. The first major surface of the optical disk includes a data region having an intermediate portion and an outer portion. The outer portion extends to the outer edge of the optical disk. The disk substrate has a thickness defined by the distance between the first major surface and the second major surface. The optical disk also includes an information layer covering the data region.Type: GrantFiled: May 7, 2004Date of Patent: October 3, 2006Assignee: Imation Corp.Inventors: Chad R. Sandstrom, Douglas R. Plourde, Dean E. Sitz, Donald J. Kerfeld, John R. Johnson
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Patent number: 6977052Abstract: In one embodiment, the invention is directed to a manufacturing process for optical data storage disks that makes use of a check disk very early in the production cycle. The check disk can be replicated directly from the master without destroying the master. The check disk may then be tested in order to validate the pattern created on the master. In some cases, the check disk may be delivered to customers, allowing the customers to verify the check disk. Once the check disk has been verified, the master can be used to create one or more stampers, which can be used in a mass production process for creating optical data storage disks. However, if the check disk is defective or otherwise not acceptable, the production cycle can be halted prior to creating any stampers. In this manner, the invention can be used to avoid creation of defective stampers or other defective mass production tools.Type: GrantFiled: January 18, 2002Date of Patent: December 20, 2005Assignee: Imation CorpInventors: Ted L. Bahns, Barry E. Brovold, Donald J. Kerfeld
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Patent number: 6961950Abstract: The invention is directed toward techniques for creating molded substrates for use in various different data storage media. The molded substrates have improved thickness profiles that can improve media quality, and in some cases facilitate higher data storage densities. In many cases, the improved thickness profile is a thickness profile that has improved flatness. Mechanical flatness or optical flatness can be achieved. In particular, optical flatness is desirable for substrates used in holographic data storage media having a sandwiched construction.Type: GrantFiled: September 4, 2001Date of Patent: November 1, 2005Assignee: Imation Corp.Inventors: Donald J. Kerfeld, Douglas J. Chaput, Jathan D. Edwards, Chad R. Sandstrom
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Publication number: 20040231531Abstract: A date storage master disk and method of making a data storage master disk. The data storage disk master is for use in a data storage disk replication process. The data storage disk molding processes produces replica disks having a surface relief pattern with replica lands and replica grooves. The method includes providing a master substrate. The master substrate is at least partially covered with a layer of photosensitive material. A surface relief pattern having master lands and master grooves is recorded in the data storage disk master, including the steps of exposing and developing the photosensitive material is controlled to form master grooves extending down to a substrate interface between the master substrate and the layer of photosensitive material, such that the width of the master grooves at the substrate interface corresponds to a desired width of the replica lands.Type: ApplicationFiled: March 2, 2004Publication date: November 25, 2004Inventors: Jathan D. Edwards, Donald J. Kerfeld
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Patent number: 6821460Abstract: The invention is directed towards techniques for creating optical data storage disks. In one embodiment, the invention provides a simultaneous two-sided rolling bead process. For example, a method may include positioning a first bead of photopolymer for distribution between a bottom stamper and a substrate, and positioning a second bead of photopolymer for distribution between a top stamper and the substrate. The method may also include passing a roller over the top stamper to distribute the beads of photopolymer, curing the photopolymer, and removing the substrate from the stampers. The simultaneous two-sided rolling bead process can be repeated on the same medium to create a two-sided dual-layer data storage medium or a two-sided multi-layer data storage medium.Type: GrantFiled: July 16, 2001Date of Patent: November 23, 2004Assignee: Imation Corp.Inventors: Donald J. Kerfeld, Barry E. Brovold
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Publication number: 20040218510Abstract: An optical disk exhibiting no detrimental thickness increase (edge wedge effect) that arises at the outer diameter of an optical disk substrate during an injection molding manufacturing process, and an apparatus and method for making such a disk. The optical disk of the present invention is designed for use with an optical disk player, especially where the data on the optical disk is stored air incident. This optical disk includes a disk substrate made from a molded polymeric material. The disk substrate has a first major surface, a second major surface, and an outer edge. The first major surface of the optical disk includes a data region having an intermediate portion and an outer portion. The outer portion extends to the outer edge of the optical disk. The disk substrate has a thickness defined by the distance between the first major surface and the second major surface. The optical disk also includes an information layer covering the data region.Type: ApplicationFiled: May 7, 2004Publication date: November 4, 2004Inventors: Chad R. Sandstrom, Douglas R. Plourde, Dean E. Sitz, Donald J. Kerfeld, John R. Johnson
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Publication number: 20040170117Abstract: A data storage master disk and method of making a data storage master disk. The data storage disk master is for use in a data storage disk replication process. The data storage disk molding processes produces replica disks having a surface relief pattern with replica lands and replica grooves. The method includes providing a master substrate. The master substrate is at least partially covered with a layer of photosensitive material. A surface relief pattern having master lands and master grooves is recorded in the data storage disk master, including the steps of exposing and developing the photosensitive material. The exposing and developing of a specified thickness of photosensitive material is controlled to form master grooves extending down to a substrate interface between the master substrate and the layer of photosensitive material, such that the width of the master grooves at the substrate interface corresponds to a desired width of the replica lands.Type: ApplicationFiled: March 2, 2004Publication date: September 2, 2004Inventors: Jathan D. Edwards, Donald J. Kerfeld
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Patent number: 6752611Abstract: An optical disk exhibiting no detrimental thickness increase (edge wedge effect) that arises at the outer diameter of an optical disk substrate during an injection molding manufacturing process, and an apparatus and method for making such a disk. The optical disk of the present invention is designed for use with an optical disk player, especially where the data on the optical disk is stored air incident. This optical disk includes a disk substrate made from a molded polymeric material. The disk substrate has a first major surface, a second major surface, and an outer edge. The first major surface of the optical disk includes a data region having an intermediate portion and an outer portion. The outer portion extends to the outer edge of the optical disk. The disk substrate has a thickness defined by the distance between the first major surface and the second major surface. The optical disk also includes an information layer covering the data region.Type: GrantFiled: November 15, 2001Date of Patent: June 22, 2004Assignee: Imation Corp.Inventors: Chad R. Sandstrom, Douglas R. Plourde, Dean E. Sitz, Donald J. Kerfeld, John R. Johnson
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Patent number: RE44633Abstract: A data storage master disk and method of making a data storage master disk. The data storage disk master is for use in a data storage disk replication process. The data storage disk molding processes produces replica disks having a surface relief pattern with replica lands and replica grooves. The method includes providing a master substrate. The master substrate is at least partially covered with a layer of photosensitive material. A surface relief pattern having master lands and master grooves is recorded in the data storage disk master, including the steps of exposing and developing the photosensitive material is controlled to form master grooves extending down to a substrate interface between the master substrate and the layer of photosensitive material, such that the width of the master grooves at the substrate interface corresponds to a desired width of the replica lands.Type: GrantFiled: September 23, 2011Date of Patent: December 10, 2013Assignee: Legger Col. A.B. LLCInventors: Jathan D. Edwards, Donald J. Kerfeld