Patents by Inventor John H. Rilum
John H. Rilum 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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Publication number: 20080204850Abstract: An optical media is provided with an associated persistent electrochromic material. The electrochromic material has at least two states. In a first state, the electrochromic material interferes with the ability of an interrogating laser beam to read data from the optical media, and in a second state, the electrochromic material is substantially transparent, enabling the laser beam to read the disc. Advantageously, the persistent electrochromic material holds a desired optical state without the application of external power. The persistent time period may extend for days, weeks, or years depending on particular constructions, and on application requirements. The optical media has an integrated circuit, which is used to cause the electrochromic material to transition from a first state to the second state. In one example, an integrated circuit acts as the powering circuit for the electrochromic material, as well as providing logic and processing functions.Type: ApplicationFiled: July 28, 2006Publication date: August 28, 2008Inventors: Anoop Agrawal, John H. Rilum, John P. Cronin, Juan Carlos Tonazzi Lopez, Paul Atkinson, Rick Marquardt, Steve Parsons
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Patent number: 7190661Abstract: Improvements in the shape of three-dimensional features displayed in optical recording structures, particularly in such structures displaying features of differing dimensional characteristics. The shape improvements include reductions in berm height and width, dual level data marks and tracking guides, and land areas projecting above or into the surface of the recording structure.Type: GrantFiled: March 11, 2005Date of Patent: March 13, 2007Assignee: Optical Disc CorporationInventors: Richard L. Wilkinson, John H. Rilum, Carlyle J. Eberly, John R. Holmes
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Patent number: 7102991Abstract: Improvements in the shape of three-dimensional features displayed in optical recording structures, particularly in such structures displaying features of differing dimensional characteristics. The shape improvements include reductions in berm height and width, dual level data marks and tracking guides, and land areas projecting above or into the surface of the recording structure.Type: GrantFiled: March 7, 2003Date of Patent: September 5, 2006Assignee: Optical Disc CorporationInventors: Richard L. Wilkinson, John H. Rilum, Carlyle J. Eberly, John R. Holmes
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Patent number: 7054260Abstract: A hybrid disc whose recordable-band grooves are wider and shallower than the pre-recorded ROM data pits. The ROM pits may be pre-recorded in ROM grooves that are at least as wide, but shallower than, the ROM pits. The ROM lands intervene between consecutive ROM pits, whether or not a ROM groove is provided. In the preferred embodiment, one beam of a dual beam apparatus records the ROM pits, while the other beam records the pre-grooves, and also records the ROM groove, if present. In most embodiments a thermal mastering process provides smooth feature surfaces to facilitate replication of the hybrid disc masters. The berms normally forming at the radial extremities of the pits and grooves in the masters, by thermal expulsion processes, may be reduced or eliminated by methods taught.Type: GrantFiled: September 25, 2002Date of Patent: May 30, 2006Assignee: Optical Disc CorporationInventors: John H. Rilum, Carlyle J. Eberly
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Patent number: 7042475Abstract: A method and apparatus for manufacturing hybrid disc whose recordable-band grooves are wider and shallower than the pre-recorded ROM data pits. The ROM pits may be pre-recorded in ROM grooves that are at least as wide, but shallower than, the ROM pits. The ROM lands intervene between consecutive ROM pits, whether or not a ROM groove is provided. In the preferred embodiment, one beam of a dual beam apparatus records the ROM pits, while the other beam records the pre-grooves, and also records the ROM groove, if present. In most embodiments a thermal mastering process provides smooth feature surfaces to facilitate replication of the hybrid disc masters. The berms normally forming at the radial extremities of the pits and grooves in the masters, by thermal expulsion processes, may be reduced or eliminated by methods taught.Type: GrantFiled: August 29, 2003Date of Patent: May 9, 2006Assignee: Optical Disc CorporationInventors: John H. Rilum, Carlyle J. Eberly
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Patent number: 7016295Abstract: A hybrid disc whose ROM grooves are less than 170 nanometers deep, and whose pre-recorded ROM data pits are more than 350 nanometers or less than 250 nanometers deep, as measured from the effective land level. The ROM pits may be pre-recorded in ROM grooves that are shallower than the ROM pits, where the ROM pits are narrower, of equivalent width or up to approximately 10% wider than the ROM grooves, respectively measured at half-depth, although the transverse extent of the ROM pits will not typically exceed that of the ROM grooves. The ROM lands intervene between consecutive ROM pits, whether or not a ROM groove is provided. In the preferred embodiment, one beam of a dual beam apparatus records the ROM pits, while the other beam records the R-band pre-grooves, and also records the ROM groove, if present. In most embodiments a thermal mastering process provides smooth feature surfaces to facilitate replication of the hybrid disc masters.Type: GrantFiled: March 18, 2003Date of Patent: March 21, 2006Assignee: Optical Disc CorporationInventors: John H. Rilum, Carlyle J. Eberly
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Patent number: 6785221Abstract: A method to produce improvements in the shape of three-dimensional features displayed in optical recording structures, particularly in such structures displaying features of differing dimensional characteristics. The shape improvements include reductions in berm height and width, dual level data marks and tracking guides, and land areas projecting above or into the surface of the recording structure. The method includes dual and/or dithered beam writing onto the structure and improved composition of the active layer of the structure.Type: GrantFiled: March 7, 2003Date of Patent: August 31, 2004Assignee: Optical Disc CorporationInventors: Richard L. Wilkinson, John H. Rilum, Carlyle J. Eberly, John R. Holmes
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Publication number: 20040114492Abstract: A method and apparatus for manufacturing hybrid disc whose recordable-band grooves are wider and shallower than the pre-recorded ROM data pits. The ROM pits may be pre-recorded in ROM grooves that are at least as wide, but shallower than, the ROM pits. The ROM lands intervene between consecutive ROM pits, whether or not a ROM groove is provided. In the preferred embodiment, one beam of a dual beam apparatus records the ROM pits, while the other beam records the pre-grooves, and also records the ROM groove, if present. In most embodiments a thermal mastering process provides smooth feature surfaces to facilitate replication of the hybrid disc masters. The berms normally forming at the radial extremities of the pits and grooves in the masters, by thermal expulsion processes, may be reduced or eliminated by methods taught.Type: ApplicationFiled: August 29, 2003Publication date: June 17, 2004Inventors: John H. Rilum, Carlyle J. Eberly
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Publication number: 20030193875Abstract: A hybrid disc whose ROM grooves are less than 170 nanometers deep, and whose pre-recorded ROM data pits are more than 350 nanometers or less than 250 nanometers deep, as measured from the effective land level. The ROM pits may be pre-recorded in ROM grooves that are shallower than the ROM pits, where the ROM pits are narrower, of equivalent width or up to approximately 10% wider than the ROM grooves, respectively measured at half-depth, although the transverse extent of the ROM pits will not typically exceed that of the ROM grooves. The ROM lands intervene between consecutive ROM pits, whether or not a ROM groove is provided. In the preferred embodiment, one beam of a dual beam apparatus records the ROM pits, while the other beam records the R-band pre-grooves, and also records the ROM groove, if present. In most embodiments a thermal mastering process provides smooth feature surfaces to facilitate replication of the hybrid disc masters.Type: ApplicationFiled: March 18, 2003Publication date: October 16, 2003Inventors: John H. Rilum, Carlyle J. Eberly
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Publication number: 20030174595Abstract: An apparatus to produce optical recording structures displaying improvements in the shape of three-dimensional features displayed therein. The shape improvements include reductions in berm height and width, dual level data marks and tracking guides, and land areas projecting above or into the surface of the recording structure. The apparatus may include dual and/or dithered beam writing elements.Type: ApplicationFiled: March 7, 2003Publication date: September 18, 2003Inventors: Richard L. Wilkinson, John H. Rilum, Carlyle J. Eberly, John R. Holmes
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Publication number: 20030147325Abstract: A method to produce improvements in the shape of three-dimensional features displayed in optical recording structures, particularly in such structures displaying features of differing dimensional characteristics. The shape improvements include reductions in berm height and width, dual level data marks and tracking guides, and land areas projecting above or into the surface of the recording structure. The method includes dual and/or dithered beam writing onto the structure and improved composition of the active layer of the structure.Type: ApplicationFiled: March 7, 2003Publication date: August 7, 2003Inventors: Richard L. Wilkinson, John H. Rilum, Carlyle J. Eberly, John R. Holmes
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Publication number: 20030147326Abstract: Improvements in the shape of three-dimensional features displayed in optical recording structures, particularly in such structures displaying features of differing dimensional characteristics. The shape improvements include reductions in berm height and width, dual level data marks and tracking guides, and land areas projecting above or into the surface of the recording structure.Type: ApplicationFiled: March 7, 2003Publication date: August 7, 2003Inventors: Richard L. Wilkinson, John H. Rilum, Carlyle J. Eberly, John R. Holmes
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Patent number: 6570840Abstract: Disclosed are improvements in the transverse sectional shape of three-dimensional features displayed in optical recording structures—discs, cylinders, cards, multi-layered devices and structures replicated from them—to increase Figure of Merit. The cross-sectional shape improvements include reductions in berm height and width, dual level data marks and tracking guides, and land areas projecting above or into the surface of the recording structure. Disclosed methods include dual and/or dithered beam writing onto the structure and improved composition of the active layer of the structure. Also disclosed are apparatus for producing such improved features on optical recording structures, according to one or more of the disclosed methods.Type: GrantFiled: April 26, 2000Date of Patent: May 27, 2003Assignee: Optical Disc CorporationInventors: Richard L. Wilkinson, John H. Rilum, Carlyle J. Eberly, John R. Holmes
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Publication number: 20030067862Abstract: A hybrid disc whose recordable-band grooves are wider and shallower than the pre-recorded ROM data pits. The ROM pits may be pre-recorded in ROM grooves that are at least as wide, but shallower than, the ROM pits. The ROM lands intervene between consecutive ROM pits, whether or not a ROM groove is provided. In the preferred embodiment, one beam of a dual beam apparatus records the ROM pits, while the other beam records the pre-grooves, and also records the ROM groove, if present. In most embodiments a thermal mastering process provides smooth feature surfaces to facilitate replication of the hybrid disc masters. The berms normally forming at the radial extremities of the pits and grooves in the masters, by thermal expulsion processes, may be reduced or eliminated by methods taught.Type: ApplicationFiled: September 25, 2002Publication date: April 10, 2003Inventors: John H. Rilum, Carlyle J. Eberly
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Patent number: 5608712Abstract: Method and apparatus for improving the characteristics of the surface effects on a replicated optical disc the master for which is recorded on an optical recording apparatus which includes a writing light beam source and an optical modulator for modulating the intensity of the writing beam of light above and below a threshold level of a relatively moving recording medium in response to a modulator drive signal for recording information on the medium, the light beam being capable of forming a track of surface effects or indicia in the relatively moving master recording medium when the writing beam is above threshold and incapable of forming surface effects in the relatively moving recording medium when the writing beam is below threshold. The method includes receiving a substantially rectangular waveform intended to control the optical modulator.Type: GrantFiled: March 8, 1995Date of Patent: March 4, 1997Assignee: Optical Disc CorporationInventors: John H. Rilum, Richard L. Wilkinson, Shigang Li, John F. Browne, William W. Boyle