Patents by Inventor Palaniappan Chinnakaruppan
Palaniappan Chinnakaruppan 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: 11691912Abstract: A glass member for a housing of an electronic device may include an aluminosilicate glass substrate defining a first surface of the glass member, the first surface having a first surface roughness, a fused composite coating bonded to a portion of the aluminosilicate glass substrate and defining a second surface of the glass member, the second surface having a second surface roughness greater than the first surface roughness, a first ion-exchanged layer extending into the glass member and through the fused composite coating, and a second ion-exchanged layer extending into the glass member from the first surface. The fused composite coating may include an amorphous glass matrix and a crystalline material dispersed in the amorphous glass matrix.Type: GrantFiled: October 21, 2019Date of Patent: July 4, 2023Assignee: APPLE INC.Inventors: Masashige Tatebe, Takahiro Oshima, Jody Akana, Palaniappan Chinnakaruppan, Tushar S. Deshpande, Kenichi Nakajima, Shigehiro Sanichi, Takashi Kato, Koji Takano
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Patent number: 11192823Abstract: A laser-textured glass cover member suitable for use in an electronic device is disclosed. The laser-textured surface of the glass cover member may provide a smooth feel to an external surface of the electronic device without introducing a perceptible visual texture. Methods for making the laser-textured glass cover members are also disclosed.Type: GrantFiled: September 9, 2019Date of Patent: December 7, 2021Assignee: APPLE INC.Inventors: Michael M. Li, Jairam Manjunathaiah, Palaniappan Chinnakaruppan
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Publication number: 20200385307Abstract: A laser-textured glass cover member suitable for use in an electronic device is disclosed. The laser-textured surface of the glass cover member may provide a smooth feel to an external surface of the electronic device without introducing a perceptible visual texture. Methods for making the laser-textured glass cover members are also disclosed.Type: ApplicationFiled: September 9, 2019Publication date: December 10, 2020Inventors: Michael M. Li, Jairam Manjunathaiah, Palaniappan Chinnakaruppan
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Patent number: 10691169Abstract: A cover for an electronic device and methods of forming a cover is disclosed. The electronic device may include a housing, and a cover coupled to the housing. The cover may have an inner surface having at least one of an intermediate polish and a final polish, a groove formed on the inner surface, and an outer surface positioned opposite the inner surface. The outer surface may have at least one of the intermediate polish and the final polish. The cover may also have a rounded perimeter portion formed between the inner surface and the outer surface. The rounded perimeter portion may be positioned adjacent the groove. The method for forming the cover may include performing a first polishing process on the sapphire component using a polishing tool, and performing a second polishing process on the groove of the sapphire component forming the cover using blasting media.Type: GrantFiled: May 9, 2018Date of Patent: June 23, 2020Assignee: APPLE INC.Inventors: Jeffrey C. Mylvaganam, Erik G. de Jong, Dale N. Memering, Xiao Bing Cai, Palaniappan Chinnakaruppan, Jong Kong Lee, Srikanth Kamireddi, Sawako Kamei, Feng Min, Jing Zhang, Xiang Du, Sai Feng Liu
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Publication number: 20200189973Abstract: A glass member for a housing of an electronic device may include an aluminosilicate glass substrate defining a first surface of the glass member, the first surface having a first surface roughness, a fused composite coating bonded to a portion of the aluminosilicate glass substrate and defining a second surface of the glass member, the second surface having a second surface roughness greater than the first surface roughness, a first ion-exchanged layer extending into the glass member and through the fused composite coating, and a second ion-exchanged layer extending into the glass member from the first surface. The fused composite coating may include an amorphous glass matrix and a crystalline material dispersed in the amorphous glass matrix.Type: ApplicationFiled: October 21, 2019Publication date: June 18, 2020Inventors: Masashige Tatebe, Takahiro Oshima, Jody Akana, Palaniappan Chinnakaruppan, Tushar S. Deshpande, Kenichi Nakajima, Shigehiro Sanichi, Takashi Kato, Koji Takano
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Patent number: 10406634Abstract: A ceramic material, such as sapphire, is irradiated using a laser-based process to form a cut. In some implementations, a region of the ceramic material adjacent to the cut may be heated. The region may be removed to form an edge feature. In various implementations, the region of the ceramic material adjacent to the cut may be shielded from an outer portion of a laser beam used in the laser-based process using a shield, such as a polyethylene film. This removal and/or shielding operations may improve the mechanical strength of the ceramic material.Type: GrantFiled: July 1, 2015Date of Patent: September 10, 2019Assignee: APPLE INC.Inventors: Michael M. Li, Palaniappan Chinnakaruppan, Yulei Sun, Phillip W. Hum, Marwan Rammah
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Patent number: 10112278Abstract: A ceramic component and methods for making a ceramic component are disclosed. In particular, a sapphire component may be polished by positioning a compliant pad adjacent to a surface of the sapphire component. An abrasive slurry may be disposed or introduced between the compliant pad and the surface. The compliant pad may be moved with respect to the surface to produce a polished surface. The abrasive slurry may include a liquid component having a high pH level and medium-sized abrasive particulates.Type: GrantFiled: December 30, 2015Date of Patent: October 30, 2018Assignee: APPLE INC.Inventors: Palaniappan Chinnakaruppan, Srikanth Kamireddi
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Publication number: 20180284843Abstract: A cover for an electronic device and methods of forming a cover is disclosed. The electronic device may include a housing, and a cover coupled to the housing. The cover may have an inner surface having at least one of an intermediate polish and a final polish, a groove formed on the inner surface, and an outer surface positioned opposite the inner surface. The outer surface may have at least one of the intermediate polish and the final polish. The cover may also have a rounded perimeter portion formed between the inner surface and the outer surface. The rounded perimeter portion may be positioned adjacent the groove. The method for forming the cover may include performing a first polishing process on the sapphire component using a polishing tool, and performing a second polishing process on the groove of the sapphire component forming the cover using blasting media.Type: ApplicationFiled: May 9, 2018Publication date: October 4, 2018Inventors: Jeffrey C. Mylvaganam, Erik G. de Jong, Dele N. Memering, Xiao Bing Cai, Palaniappan Chinnakaruppan, Jong Kong Lee, Srikanth Kamireddi, Sawako Kamei, Feng Min, Jing Zhang, Xiang Du, Sai Feng Liu
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Patent number: 10065289Abstract: A polishing system and method for polishing a channel formed within a component is disclosed. The polishing system may include a tooling element operable to be positioned within a recess formed partially through a component. The tooling element may include an outer surface having a geometry corresponding to a geometry of the recess formed in the component. The tooling element forms a channel between the recess of the component and the tooling element when positioned in the recess. The system may also include a first member in fluid communication with a first opening of the channel, and a second member in fluid communication with a second opening of the channel. The second opening may be in fluid communication with the first opening via the channel. Additionally, the first and second member may be configured to continuously vary a pressure within the channel to move an abrasive slurry within the channel.Type: GrantFiled: September 2, 2015Date of Patent: September 4, 2018Assignee: Apple Inc.Inventors: Palaniappan Chinnakaruppan, Srikanth Kamireddi
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Patent number: 9977464Abstract: A cover for an electronic device and methods of forming a cover is disclosed. The electronic device may include a housing, and a cover coupled to the housing. The cover may have an inner surface having at least one of an intermediate polish and a final polish, a groove formed on the inner surface, and an outer surface positioned opposite the inner surface. The outer surface may have at least one of the intermediate polish and the final polish. The cover may also have a rounded perimeter portion formed between the inner surface and the outer surface. The rounded perimeter portion may be positioned adjacent the groove. The method for forming the cover may include performing a first polishing process on the sapphire component using a polishing tool, and performing a second polishing process on the groove of the sapphire component forming the cover using blasting media.Type: GrantFiled: August 26, 2015Date of Patent: May 22, 2018Assignee: APPLE INC.Inventors: Jeffrey C. Mylvaganam, Erik G. de Jong, Dale N. Memering, Xiao Bing Cai, Palaniappan Chinnakaruppan, Jong Kong Lee, Srikanth Kamireddi, Sawako Kamei, Feng Min, Jing Zhang, Xiang Du, Sai Feng Liu
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Publication number: 20170087683Abstract: A ceramic component and methods for making a ceramic component are disclosed. In particular, a sapphire component may be polished by positioning a compliant pad adjacent to a surface of the sapphire component. An abrasive slurry may be disposed or introduced between the compliant pad and the surface. The compliant pad may be moved with respect to the surface to produce a polished surface. The abrasive slurry may include a liquid component having a high pH level and medium-sized abrasive particulates.Type: ApplicationFiled: December 30, 2015Publication date: March 30, 2017Inventors: Palaniappan Chinnakaruppan, Srikanth Kamireddi
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Publication number: 20170001266Abstract: A ceramic material, such as sapphire, is irradiated using a laser-based process to form a cut. In some implementations, a region of the ceramic material adjacent to the cut may be heated. The region may be removed to form an edge feature. In various implementations, the region of the ceramic material adjacent to the cut may be shielded from an outer portion of a laser beam used in the laser-based process using a shield, such as a polyethylene film. This removal and/or shielding operations may improve the mechanical strength of the ceramic material.Type: ApplicationFiled: July 1, 2015Publication date: January 5, 2017Inventors: Michael M. Li, Palaniappan Chinnakaruppan, Yulei Sun, Phillip W. Hum, Marwan Rammah
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Patent number: 9464365Abstract: A sapphire substrate includes a generally planar surface having a crystallographic orientation selected from the group consisting of a-plane, r-plane, m-plane, and c-plane orientations, and having a nTTV of not greater than about 0.037 ?m/cm2, wherein nTTV is total thickness variation normalized for surface area of the generally planar surface, the substrate having a diameter not less than about 9.0 cm.Type: GrantFiled: February 6, 2014Date of Patent: October 11, 2016Assignee: SAINT-GOBAIN CERAMICS & PLASTICS, INC.Inventors: Brahmanandam V. Tanikella, Palaniappan Chinnakaruppan, Robert A. Rizzuto, Isaac K. Cherian, Ramanujam Vedantham, Matthew A. Simpson
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Publication number: 20160059383Abstract: A polishing system and method for polishing a channel formed within a component is disclosed. The polishing system may include a tooling element operable to be positioned within a recess formed partially through a component. The tooling element may include an outer surface having a geometry corresponding to a geometry of the recess formed in the component. The tooling element forms a channel between the recess of the component and the tooling element when positioned in the recess. The system may also include a first member in fluid communication with a first opening of the channel, and a second member in fluid communication with a second opening of the channel. The second opening may be in fluid communication with the first opening via the channel. Additionally, the first and second member may be configured to continuously vary a pressure within the channel to move an abrasive slurry within the channel.Type: ApplicationFiled: September 2, 2015Publication date: March 3, 2016Inventors: Palaniappan Chinnakaruppan, Srikanth Kamireddi
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Publication number: 20160062405Abstract: A cover for an electronic device and methods of forming a cover is disclosed. The electronic device may include a housing, and a cover coupled to the housing. The cover may have an inner surface having at least one of an intermediate polish and a final polish, a groove formed on the inner surface, and an outer surface positioned opposite the inner surface. The outer surface may have at least one of the intermediate polish and the final polish. The cover may also have a rounded perimeter portion formed between the inner surface and the outer surface. The rounded perimeter portion may be positioned adjacent the groove. The method for forming the cover may include performing a first polishing process on the sapphire component using a polishing tool, and performing a second polishing process on the groove of the sapphire component forming the cover using blasting media.Type: ApplicationFiled: August 26, 2015Publication date: March 3, 2016Inventors: Jeffrey C. Mylvaganam, Erik G. de Jong, Dale N. Memering, Xiao Bing Cai, Palaniappan Chinnakaruppan, Jong Kong Lee, Srikanth Kamireddi, Sawako Kamei, Feng Min, Jing Zhang, Xiang Du, Sai Feng Liu
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Publication number: 20140335308Abstract: A sapphire substrate includes a generally planar surface having a crystallographic orientation selected from the group consisting of a-plane, r-plane, m-plane, and c-plane orientations, and having a nTTV of not greater than about 0.037 ?m/cm2, wherein nTTV is total thickness variation normalized for surface area of the generally planar surface, the substrate having a diameter not less than about 9.0 cm.Type: ApplicationFiled: July 25, 2014Publication date: November 13, 2014Inventors: Brahmanandam V. Tanikella, Palaniappan Chinnakaruppan, Robert A. Rizzuto, Isaac K. Cherian, Ramanujam Vedantham, Matthew A. Simpson
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Publication number: 20140234568Abstract: A sapphire substrate includes a generally planar surface having a crystallographic orientation selected from the group consisting of a-plane, r-plane, m-plane, and c-plane orientations, and having a nTTV of not greater than about 0.037 ?m/cm2, wherein nTTV is total thickness variation normalized for surface area of the generally planar surface, the substrate having a diameter not less than about 9.0 cm.Type: ApplicationFiled: February 6, 2014Publication date: August 21, 2014Applicant: Saint-Gobain Ceramics & Plastics, Inc.Inventors: Brahmanandam V. Tanikella, Palaniappan Chinnakaruppan, Robert A. Rizzuto, Isaac K. Cherian, Ramanujam Vedantham, Matthew A. Simpson
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Patent number: 8740670Abstract: A sapphire substrate includes a generally planar surface having a crystallographic orientation selected from the group consisting of a-plane, r-plane, m-plane, and c-plane orientations, and having a nTTV of not greater than about 0.037 ?m/cm2, wherein nTTV is total thickness variation normalized for surface area of the generally planar surface, the substrate having a diameter not less than about 9.0 cm.Type: GrantFiled: May 15, 2012Date of Patent: June 3, 2014Assignee: Saint-Gobain Ceramics & Plastics, Inc.Inventors: Brahmanandam V. Tanikella, Palaniappan Chinnakaruppan, Robert A. Rizzuto, Isaac K. Cherian, Ramanujam Vedantham, Matthew A. Simpson
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Patent number: 8455879Abstract: A sapphire substrate includes a generally planar surface having a crystallographic orientation selected from the group consisting of a-plane, r-plane, m-plane, and c-plane orientations, and having a nTTV of not greater than about 0.037 ?m/cm2, wherein nTTV is total thickness variation normalized for surface area of the generally planar surface, the substrate having a diameter not less than about 9.0 cm.Type: GrantFiled: December 21, 2007Date of Patent: June 4, 2013Assignee: Saint-Gobain Ceramics & Plastics, Inc.Inventors: Brahmanandam V. Tanikella, Matthew A. Simpson, Palaniappan Chinnakaruppan, Robert A. Rizzuto, Ramanujam Vedantham
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Publication number: 20120289126Abstract: A sapphire substrate includes a generally planar surface having a crystallographic orientation selected from the group consisting of a-plane, r-plane, m-plane, and c-plane orientations, and having a nTTV of not greater than about 0.037 ?m/cm2, wherein nTTV is total thickness variation normalized for surface area of the generally planar surface, the substrate having a diameter not less than about 9.0 cm.Type: ApplicationFiled: May 15, 2012Publication date: November 15, 2012Applicant: SAINT-GOBAIN CERAMICS & PLASTICS, INC.Inventors: Brahmanandam V. Tanikella, Palaniappan Chinnakaruppan, Robert A. Rizzuto, Isaac K. Cherian, Ramanujam Veddantham