Patents by Inventor Kazuya Tokunaga
Kazuya Tokunaga 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: 9224475Abstract: A NAND flash memory chip includes wide openings in an inter-poly dielectric layer through which gaps are later etched to define structures such as select gates. Such select gates are asymmetric, with inter-poly dielectric on a side adjacent to a memory cell and no inter-poly dielectric on a side away from a memory cell. Gaps etched through such openings may also define peripheral devices.Type: GrantFiled: August 23, 2012Date of Patent: December 29, 2015Assignee: SanDisk Technologies Inc.Inventors: Jongsun Sel, Tuan Pham, Kazuya Tokunaga, Hiro Kinoshita
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Patent number: 9153595Abstract: A NAND flash memory chip includes word lines formed by etching through concentric conductive loops and, in the same etch step, etching through a conductive strip to form select lines. A conductive loop forms two word lines which are in different erase blocks and are separately controlled by peripheral circuits.Type: GrantFiled: September 14, 2012Date of Patent: October 6, 2015Assignee: SanDisk Technologies Inc.Inventors: Jongsun Sel, Tuan Pham, Kazuya Tokunaga
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Patent number: 9129854Abstract: A NAND flash memory chip is made by forming sacrificial control gate structures and sacrificial select structures, and subsequently replacing these sacrificial structures with metal. Filler structures are formed between sacrificial control gate structures and are subsequently removed to form air gaps between neighboring control gate lines and between floating gates.Type: GrantFiled: October 4, 2012Date of Patent: September 8, 2015Assignee: SanDisk Technologies Inc.Inventors: Kazuya Tokunaga, Jongsun Sel, Marika Gunji-Yoneoka, Tuan Pham
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Publication number: 20150228582Abstract: Air gaps are formed between bit lines by etching to remove sacrificial material from between bit lines. Bit lines are protected from etch damage. Sacrificial material may be selectively oxidized prior to deposition of bit line metal so that protective oxide lies along sides of bit lines during etch. Portions of protective material may be selectively formed on tops of bit lines prior to etching sacrificial material.Type: ApplicationFiled: July 25, 2014Publication date: August 13, 2015Inventors: Jong Sun Sel, Marika Gunji-Yoneoka, Naoki Takeguchi, Chan Park, Tuan D. Pham, Kazuya Tokunaga
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Publication number: 20150228532Abstract: Air gaps are formed between bit lines by etching to remove sacrificial material from between bit lines. Bit lines are protected from etch damage. Sacrificial material may be selectively oxidized prior to deposition of bit line metal so that protective oxide lies along sides of bit lines during etch. Portions of protective material may be selectively formed on tops of bit lines prior to etching sacrificial material.Type: ApplicationFiled: July 25, 2014Publication date: August 13, 2015Inventors: Jong Sun Sel, Marika Gunji-Yoneoka, Naoki Takeguchi, Chan Park, Tuan D. Pham, Kazuya Tokunaga
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Publication number: 20140097482Abstract: A NAND flash memory chip is made by forming sacrificial control gate structures and sacrificial select structures, and subsequently replacing these sacrificial structures with metal. Filler structures are formed between sacrificial control gate structures and are subsequently removed to form air gaps between neighboring control gate lines and between floating gates.Type: ApplicationFiled: October 4, 2012Publication date: April 10, 2014Applicant: SanDisk Technologies Inc.Inventors: Kazuya Tokunaga, Jongsun Sel, Marika Gunji-Yoneoka, Tuan Pham
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Publication number: 20140078826Abstract: A NAND flash memory chip includes word lines formed by etching through concentric conductive loops and, in the same etch step, etching through a conductive strip to form select lines. A conductive loop forms two word lines which are in different erase blocks and are separately controlled by peripheral circuits.Type: ApplicationFiled: September 14, 2012Publication date: March 20, 2014Inventors: Jongsun Sel, Tuan Pham, Kazuya Tokunaga
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Publication number: 20140054669Abstract: A NAND flash memory chip includes wide openings in an inter-poly dielectric layer through which gaps are later etched to define structures such as select gates. Such select gates are asymmetric, with inter-poly dielectric on a side adjacent to a memory cell and no inter-poly dielectric on a side away from a memory cell. Gaps etched through such openings may also define peripheral devices.Type: ApplicationFiled: August 23, 2012Publication date: February 27, 2014Inventors: Jongsun Sel, Tuan Pham, Kazuya Tokunaga, Hiro Kinoshita
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Publication number: 20070132200Abstract: A number of embodiments of moveable storage racks and/or partitions that can be installed in existing buildings without the necessity of installing guide rails for them. In addition, the movement may be controlled so that the partitions move either in a parallel fashion or they can be rotated through an arc. The partitions are supported on drive and guide belts that are mounted on the underside thereof and which eliminate the need for the guide rails and spread the weight of the partition over a greater area of the floor so as to permit use in buildings which were not originally designed for such systems.Type: ApplicationFiled: February 13, 2007Publication date: June 14, 2007Inventors: Kunio Miyazaki, Tomoyuki Kawano, Ichiro Ikenega, Michihiko Higashinosono, Takuya Nakamura, Hiroyuki Kiyota, Kazuya Tokunaga
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Patent number: 7226354Abstract: A cabinet wherein air sucked from an inlet opening 4d of a shelf board combined inlet duct 4 by drive of an air purification unit 3 is passed through the shelf board combined inlet duct 4 and introduced into the inside of a case 3a, and by a dust collection filter 32 and an odor eliminating means 33. Air forced into the shelf board combined outlet duct 5 through the air duct 10 is exhausted through an outlet opening 5d of the shelf board combined outlet duct 5, and air curtain is formed along the opening of the storage section 11 of a cabinet 1. Therefore, air in the storage section 11 of the cabinet 1 is circulated and purified, while getting caught in a circulating airflow including the air curtain.Type: GrantFiled: May 29, 2002Date of Patent: June 5, 2007Assignee: Kongo Kabushiki KaishaInventors: Tomoyuki Kawano, Toshihiro Higashi, Hiroaki Koba, Ichiro Ikenaga, Kazuya Tokunaga, Satoru Yoshimitsu, Hitoshi Shibuya
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Patent number: 7032762Abstract: The invention provides a relatively simple and inexpensive power-assisted movable rack system, movement of which is controlled by an operator. The movable rack system comprises a plurality of movable racks, each of which includes a plurality of wheels, a DC motor turning forward or backward and reciprocating the movable rack, a pair of direction switches provided at opposite positions in moving directions of the movable rack, and an actuating circuit rotating the DC motor in one direction during the operation of one of the direction switches and rotating the DC motor in an opposite direction during the operation of the other direction switch. The DC motor applies dynamic braking force, so that movable racks can be stopped with a short braking distance.Type: GrantFiled: August 27, 2001Date of Patent: April 25, 2006Assignee: Kongo Co., Ltd.Inventors: Kunio Miyazaki, Tomoyuki Kawano, Kazuya Tokunaga, Ichiro Ikenaga, Toshihiro Higashi
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Publication number: 20050184018Abstract: The invention provides a relatively simple and inexpensive power-assisted movable rack system, movement of which is controlled by an operator. The movable rack system comprises a plurality of movable racks, each of which includes a plurality of wheels, a DC motor turning forward or backward and reciprocating the movable rack, a pair of direction switches provided at opposite positions in moving directions of the movable rack, and an actuating circuit rotating the DC motor in one direction during the operation of one of the direction switches and rotating the DC motor in an opposite direction during the operation of the other direction switch. The DC motor applies dynamic braking force, so that movable racks can be stopped with a short braking distance.Type: ApplicationFiled: April 29, 2005Publication date: August 25, 2005Applicant: KONGO CO., LTD.Inventors: Kunio Miyazaki, Tomoyuki Kawano, Kazuya Tokunaga, Ichiro Ikenaga, Toshihiro Higashi
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Patent number: 6848989Abstract: An environmental improvement device for a storage body and more particularly to a simplified, but highly effective device of that type wherein the stored articles are protected by a circulating flow of purified air that also prevents the entry of foreign objects into the storage area.Type: GrantFiled: May 20, 2003Date of Patent: February 1, 2005Assignee: Kongo Kabushiki KaishaInventors: Kunio Miyazaki, Tomoyuki Kawano, Ichiro Ikenaga, Kazuya Tokunaga, Toshihiro Higashi, Hiroaki Koba
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Publication number: 20040226256Abstract: Several embodiments of moveable partitioning systems wherein the relative positions of the partitions are controlled by non-contact sensors and various control systems therefore that permit controlled movement between the partitions to maintain either close spacing thereof of the establishment of predetermined width aisles between them. In addition the control system insures parallel movement of the partitions even if they are supported on a surface without tracks.Type: ApplicationFiled: April 22, 2004Publication date: November 18, 2004Applicant: KONGO KABUSHIKI KAISHAInventors: Kunio Miyazaki, Tomoyuki Kawano, Kazuya Tokunaga, Ichiro Ikenaga
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Publication number: 20040187395Abstract: Several embodiments of moveable partitions and controls that permit smooth operation and parallel movement even when they are trackless and that provide safety in operation in avoiding encounters with unexpected objects without unnecessarily stopping the operation when an object is not actually there.Type: ApplicationFiled: April 22, 2004Publication date: September 30, 2004Applicant: KONGO KABUSHIKI KAISHAInventors: Kunio Miyazaki, Tomoyuki Kawano, Kazuya Tokunaga, Ichiro Ikenaga
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Publication number: 20040166796Abstract: An environmental improvement device for a storage body and more particularly to a simplified, but highly effective device of that type wherein the stored articles are protected by a circulating flow of purified air that also prevents the entry of foreign objects into the storage area.Type: ApplicationFiled: May 20, 2003Publication date: August 26, 2004Applicant: KONGO KABUSHIKI KAISHAInventors: Kunio Miyazaki, Tomoyuki Kawano, Ichiro Ikenaga, Kazuya Tokunaga, Toshihiro Higashi, Hiroaki Koba
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Publication number: 20040038641Abstract: Storage with air purification function that can prevent the invasion of particles, harmful insects, or the like from the opening of the storage section and pollution of air in the storage section is provided.Type: ApplicationFiled: May 8, 2003Publication date: February 26, 2004Inventors: Tomoytuki Kawano, Toshihiro Higashi, Hiroaki Koba, Ichiro Ikenaga, Kazuya Tokunaga, Satoru Yoshimitsu, Hitoshi Shibuya
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Publication number: 20040035060Abstract: A number of embodiments of moveable storage racks and/or partitions that can be installed in existing buildings without the necessity of installing guide rails for them. In addition, the movement may be controlled so that the partitions move either in a parallel fashion or they can be rotated through an arc. The partitions are supported on drive and guide belts that are mounted on the underside thereof and which eliminate the need for the guide rails and spread the weight of the partition over a greater area of the floor so as to permit use in buildings which were not originally designed for such systems.Type: ApplicationFiled: February 9, 2003Publication date: February 26, 2004Inventors: Kunio Miyazaki, Tomoyuki Kawano, Takuya Nakamura, Michihiko Higashinozono, Ichiro Ikenaga, Hiroyuki Kiyota, Kazuya Tokunaga
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Publication number: 20040004051Abstract: The invention provides a relatively simple and inexpensive power-assisted movable rack system, movement of which is controlled by an operator. The movable rack system comprises a plurality of movable racks, each of which includes a plurality of wheels, a DC motor turning forward or backward and reciprocating the movable rack, a pair of direction switches provided at opposite positions in moving directions of the movable rack, and an actuating circuit rotating the DC motor in one direction during the operation of one of the direction switches and rotating the DC motor in an opposite direction during the operation of the other direction switch. The DC motor applies dynamic braking force, so that movable racks can be stopped with a short braking distance.Type: ApplicationFiled: April 28, 2003Publication date: January 8, 2004Inventors: Kunio Miyazaki, Tomoyuki Kawano, Kazuya Tokunaga, Ichiro Ikenaga, Toshihiro Higashi
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Patent number: D549994Type: GrantFiled: May 13, 2004Date of Patent: September 4, 2007Assignee: Kongo Kabushiki KaishaInventors: Kazuya Tokunaga, Toshihiro Higashi