Patents by Inventor Shinsaku Saitho
Shinsaku Saitho 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).
-
Patent number: 10978737Abstract: The present invention relates to an electrolyte solution comprising a supporting salt, a nonaqueous solvent containing a compound having a viscosity of 1.0 mPa-s or less in an amount of more than 50% by volume in the nonaqueous solvent, and a halogenated cyclic acid anhydride. According to the present invention, an electrolyte solution capable of suppressing gas generation is provided.Type: GrantFiled: June 23, 2015Date of Patent: April 13, 2021Assignee: NEC CorporationInventors: Noboru Yoshida, Ikiko Shimanuki, Shinsaku Saitho, Hitoshi Ishikawa
-
Patent number: 10361464Abstract: The present invention relates to an electrolytic solution comprising a cyclic dicarboxylic acid ester represented by the specific formula, and the secondary battery comprising the same. According to the present invention, the electrolytic solution comprising an additive which can improve a characteristics in a secondary battery and a secondary battery comprising the same can be provided.Type: GrantFiled: June 16, 2015Date of Patent: July 23, 2019Assignee: NEC CorporationInventors: Noboru Yoshida, Ikiko Shimanuki, Shinsaku Saitho, Hitoshi Ishikawa
-
Patent number: 10224568Abstract: It is an object of the present invention to provide an electrolytic solution capable of suppressing gas generation. The present exemplary embodiment is an electrolytic solution comprising a supporting salt, a nonaqueous solvent that dissolves the supporting salt, a cyclic sulfonic acid ester compound represented by predetermined formula (1), and an acid anhydride. According to the exemplary embodiment, an electrolytic solution capable of suppressing gas generation can be provided.Type: GrantFiled: July 11, 2014Date of Patent: March 5, 2019Assignee: NEC CorporationInventors: Noboru Yoshida, Shinsaku Saitho, Kazuaki Matsumoto, Ikiko Shimanuki, Daisuke Kawasaki, Yuukou Katou, Hitoshi Ishikawa
-
Patent number: 9871272Abstract: The present invention relates to an electrolyte solution for a lithium secondary battery, which contains a sulfonate compound represented by a specific formula and carboxylic anhydride having one or more C?C double bonds, and a lithium secondary battery using the same.Type: GrantFiled: November 28, 2013Date of Patent: January 16, 2018Assignee: NEC CorporationInventors: Shinsaku Saitho, Hitoshi Ishikawa, Kazuhiko Inoue
-
Publication number: 20170214087Abstract: The present invention relates to an electrolyte solution comprising a supporting salt, a nonaqueous solvent containing a compound having a viscosity of 1.0 mPa-s or less in an amount of more than 50% by volume in the nonaqueous solvent, and a halogenated cyclic acid anhydride. According to the present invention, an electrolyte solution capable of suppressing gas generation is provided.Type: ApplicationFiled: June 23, 2015Publication date: July 27, 2017Inventors: Noboru YOSHIDA, Ikiko SHIMANUKI, Shinsaku SAITHO, Hitoshi ISHIKAWA
-
Publication number: 20170149097Abstract: The present invention relates to an electrolytic solution comprising a cyclic dicarboxylic acid ester represented by the specific formula, and the secondary battery comprising the same. According to the present invention, the electrolytic solution comprising an additive which can improve a characteristics in a secondary battery and a secondary battery comprising the same can be provided.Type: ApplicationFiled: June 16, 2015Publication date: May 25, 2017Applicant: NEC CorporationInventors: Noboru YOSHIDA, Ikiko SHIMANUKI, Shinsaku SAITHO, Hitoshi ISHIKAWA
-
Publication number: 20160226098Abstract: It is an object of the present invention to provide an electrolytic solution capable of suppressing gas generation. The present exemplary embodiment is an electrolytic solution comprising a supporting salt, a nonaqueous solvent that dissolves the supporting salt, a cyclic sulfonic acid ester compound represented by predetermined formula (1), and an acid anhydride. According to the exemplary embodiment, an electrolytic solution capable of suppressing gas generation can be provided.Type: ApplicationFiled: July 11, 2014Publication date: August 4, 2016Inventors: Noboru YOSHIDA, Shinsaku SAITHO, Kazuaki MATSUMOTO, Ikiko SHIMANUKI, Daisuke KAWASAKI, Yuukou KATOU, Hitoshi ISHIKAWA
-
Publication number: 20150318577Abstract: The present invention relates to an electrolyte solution for a lithium secondary battery, which contains a sulfonate compound represented by a specific formula and carboxylic anhydride having one or more C?C double bonds, and a lithium secondary battery using the same.Type: ApplicationFiled: November 28, 2013Publication date: November 5, 2015Inventors: Shinsaku SAITHO, Hitoshi ISHIKAWA, Kazuhiko INOUE
-
Publication number: 20150118577Abstract: An embodiment of the present invention relates to a lithium secondary battery comprising: a positive electrode comprising a positive electrode active material; and an electrolytic solution comprising a nonaqueous electrolytic solvent, wherein the positive electrode active material operates at a potential of 4.5 V or more versus lithium, and the electrolytic solution comprises: the nonaqueous electrolytic solvent comprising a fluorine-containing phosphate ester represented by a given formula; and a cyclic sulfonate ester represented by a given formula.Type: ApplicationFiled: April 22, 2013Publication date: April 30, 2015Inventors: Yuukou Katou, Takehiro Noguchi, Hideaki Sasaki, Makiko Takahashi, Shinsaku Saitho
-
Publication number: 20130266847Abstract: The object of an exemplary embodiment of the invention is to provide a lithium secondary battery which has high energy density by containing a positive electrode active substance operating at a potential of 4.5 V or higher with respect to lithium and which has excellent cycle property. An exemplary embodiment of the invention is an lithium secondary battery, which comprises a positive electrode comprising a positive electrode active substance and an electrolyte liquid comprising a nonaqueous electrolyte solvent; wherein the positive electrode active substance operates at a potential of 4.5 V or higher with respect to lithium; and wherein the nonaqueous electrolyte solvent comprises a fluorine-containing phosphate represented by a prescribed formula.Type: ApplicationFiled: December 7, 2011Publication date: October 10, 2013Applicants: NEC ENERGY DEVICES, LTD., NEC CORPORATIONInventors: Takehiro Noguchi, Hideaki Sasaki, Makiko Uehara, Ippei Waki, Shinako Kaneko, Hiroshi Hatakeyama, Shinsaku Saitho, Yuukou Katou
-
Patent number: 7238540Abstract: A magnetic random access memory includes a substrate; a first ferromagnetic layer; a magnetic tunnel junction (MTJ) device provided on a same side of the substrate as the first ferromagnetic layer; and a wiring layer provided between the first ferromagnetic layer and the MTJ device. The MTJ device includes a second ferromagnetic layer opposing to the wiring layer. A first perpendicular projection of the first ferromagnetic layer on the substrate and a second perpendicular projection of the second ferromagnetic layer on the substrate are different in area, and one of the first and second perpendicular projections contains the other.Type: GrantFiled: June 23, 2004Date of Patent: July 3, 2007Assignee: NEC CorporationInventors: Hiroaki Honjo, Shinsaku Saitho
-
Patent number: 7239482Abstract: A thin-film magnetic head is constituted by forming a lower shielding layer, a read gap layer holding an MR magnetosensitive element, a common pole layer, and a write gap layer in order on an insulating substrate, forming a first flattening layer, a coil pattern layer, and a second flattening layer laminated in order on the write gap layer excluding the vicinity of an ABS plane, and forming an upper pole layer on the write gap layer and the second flattening layer nearby an ABS plane. A concave portion is formed on the common pole layer at a position separated from the ABS plane, the concave portion is filled with a nonmagnetic body, and the gap depth between the upper pole layer and the common pole layer is determined by the concave portion.Type: GrantFiled: January 18, 2006Date of Patent: July 3, 2007Assignee: TDK CorporationInventors: Shinsaku Saitho, Haruo Urai, Nobuyuki Ishiwata, Kiyotaka Shimabayashi, Yoshihiro Nonaka, Tamaki Toba
-
Patent number: 7230794Abstract: A thin-film magnetic head is constituted by forming a lower shielding layer, a read gap layer holding an MR magnetosensitive element, a common pole layer, and a write gap layer in order on an insulating substrate, forming a first flattening layer, a coil pattern layer, and a second flattening layer laminated in order on the write gap layer excluding the vicinity of an ABS plane, and forming an upper pole layer on the write gap layer and the second flattening layer nearby an ABS plane. A concave portion is formed on the common pole layer at a position separated from the ABS plane, the concave portion is filled with a nonmagnetic body, and the gap depth between the upper pole layer and the common pole layer is determined by the concave portion.Type: GrantFiled: March 24, 2006Date of Patent: June 12, 2007Assignee: TDK CorporationInventors: Shinsaku Saitho, Haruo Urai, Nobuyuki Ishiwata, Kiyotaka Shimabayashi, Yoshihiro Nonaka, Tamaki Toba
-
Publication number: 20060164758Abstract: A thin-film magnetic head is constituted by forming a lower shielding layer, a read gap layer holding an MR magnetosensitive element, a common pole layer, and a write gap layer in order on an insulating substrate, forming a first flattening layer, a coil pattern layer, and a second flattening layer laminated in order on the write gap layer excluding the vicinity of an ABS plane, and forming an upper pole layer on the write gap layer and the second flattening layer nearby an ABS plane. A concave portion is formed on the common pole layer at a position separated from the ABS plane, the concave portion is filled with a nonmagnetic body, and the gap depth between the upper pole layer and the common pole layer is determined by the concave portion.Type: ApplicationFiled: March 24, 2006Publication date: July 27, 2006Inventors: Shinsaku Saitho, Haruo Urai, Nobuyuki Ishiwata, Kiyotaka Shimabayashi, Yoshihiro Nonaka, Tamaki Toba
-
Publication number: 20060114608Abstract: To accurately decrease the gap depth between an upper pole layer and a lower pole layer and the front-end portion width of the upper pole layer. A thin-film magnetic head of the present invention is constituted by forming a lower shielding layer, a read gap layer holding an MR magnetosensitive element, a common pole layer, and a write gap layer in order on an insulating substrate, forming a first flattening layer, a coil pattern layer, and a second flattening layer laminated in order on the write gap layer excluding the vicinity of an ABS plane, and forming an upper pole layer on the write gap layer and the second flattening layer nearby an ABS plane. Moreover, a concave portion is formed on the common pole layer at a position separated from the ABS plane, the concave portion is filled with a nonmagnetic body, and the gap depth between the upper pole layer and the common pole layer is determined by the concave portion.Type: ApplicationFiled: January 18, 2006Publication date: June 1, 2006Inventors: Shinsaku Saitho, Haruo Urai, Nobuyuki Ishiwata, Kiyotaka Shimabayashi, Yoshihiro Nonaka, Tamaki Toba
-
Patent number: 7054107Abstract: To accurately decrease the gap depth between an upper pole layer and a lower pole layer and the front-end portion width of the upper pole layer. A thin-film magnetic head of the present invention is constituted by forming a lower shielding layer, a read gap layer holding an MR magnetosensitive element, a common pole layer, and a write gap layer in order on an insulating substrate, forming a first flattening layer, a coil pattern layer, and a second flattening layer laminated in order on the write gap layer excluding the vicinity of an ABS plane, and forming an upper pole layer on the write gap layer and the second flattening layer nearby an ABS plane. Moreover, a concave portion is formed on the common pole layer at a position separated from the ABS plane, the concave portion is filled with a nonmagnetic body, and the gap depth between the upper pole layer and the common pole layer is determined by the concave portion.Type: GrantFiled: February 27, 2003Date of Patent: May 30, 2006Assignee: TDK CorporationInventors: Shinsaku Saitho, Haruo Urai, Nobuyuki Ishiwata, Kiyotaka Shimabayashi, Yoshihiro Nonaka, Tamaki Toba
-
Publication number: 20040257865Abstract: A magnetic random access memory includes a substrate; a first ferromagnetic layer; a magnetic tunnel junction (MTJ) device provided on a same side of the substrate as the first ferromagnetic layer; and a wiring layer provided between the first ferromagnetic layer and the MTJ device. The MTJ device includes a second ferromagnetic layer opposing to the wiring layer. A first perpendicular projection of the first ferromagnetic layer on the substrate and a second perpendicular projection of the second ferromagnetic layer on the substrate are different in area, and one of the first and second perpendicular projections contains the other.Type: ApplicationFiled: June 23, 2004Publication date: December 23, 2004Applicant: NEC CORPORATIONInventors: Hiroaki Honjo, Shinsaku Saitho
-
Patent number: 6804088Abstract: A thin film magnetic head includes a recording pole layer that is divided into a tip portion, a wide rear portion, a flare portion, and a yoke portion as viewed from the air bearing surface (ABS). The tip portion and the wide rear portion directly contact a write gap layer. Part of the wide rear portion has a greater width that the tip portion. The wide rear portion is provided between the tip portion and the flare portion to reduce magnetic reluctance. Accordingly, it is possible to improve the pattern accuracy of the tip portion width by providing the flare portion, which reflects a large quantity of light, far from the ABS, while preventing an increase of the magnetic reluctance.Type: GrantFiled: January 11, 2001Date of Patent: October 12, 2004Assignee: NEC CorporationInventors: Yoshihiro Nonaka, Haruo Urai, Nobuyuki Ishiwata, Kiyotaka Shimabayashi, Tetsuhiro Suzuki, Shinsaku Saitho, Hiroaki Tachibana, Tamaki Toba
-
Patent number: 6597543Abstract: A thin-film magnetic head is constituted by forming a lower shielding layer, a read gap layer holding an MR magnetosensitive element, a common pole layer, and a write gap layer in order on an insulating substrate, forming a first flattening layer, a coil pattern layer, and a second flattening layer laminated in order on the write gap layer excluding the vicinity of an ABS plane, and forming an upper pole layer on the write gap layer and the second flattening layer nearby an ABS plane. A concave portion is formed on the common pole layer at a position separated from the ABS plane, the concave portion is filled with a nonmagnetic body, and the gap depth between the upper pole layer and the common pole layer is determined by the concave portion.Type: GrantFiled: May 24, 1999Date of Patent: July 22, 2003Assignee: TDK CorporationInventors: Shinsaku Saitho, Haruo Urai, Nobuyuki Ishiwata, Kiyotaka Shimabayashi, Yoshihiro Nonaka, Tamaki Toba
-
Publication number: 20030128480Abstract: To accurately decrease the gap depth between an upper pole layer and a lower pole layer and the front-end portion width of the upper pole layer.Type: ApplicationFiled: February 27, 2003Publication date: July 10, 2003Inventors: Shinsaku Saitho, Haruo Urai, Nobuyuki Ishiwata, Kiyotaka Shimabayashi, Yoshihiro Nonaka, Tamaki Toba