Patents by Inventor Hidetake Itoh
Hidetake Itoh 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: 10930444Abstract: An electrochemical device includes an element body, an exterior sheet, a seal part, and a leading terminal. The element body includes a pair of inner electrodes laminated to sandwich a separator sheet. The exterior sheet covers the element body. The seal part seals a peripheral part of the exterior sheet for immersing the element body in an electrolyte. The leading terminal extends outward from the seal part of the exterior sheet. The exterior sheet includes a front sheet and a back sheet. The front sheet includes a front-side metal sheet. The back sheet includes a back-side metal sheet.Type: GrantFiled: February 12, 2019Date of Patent: February 23, 2021Assignee: TDK CORPORATIONInventors: Hiroaki Hasegawa, Hidetake Itoh, Yoshihiko Ohashi, Yuji Yoshino, Kazunori Yoshikawa
-
Patent number: 10910167Abstract: An electrochemical device, which can be thin enough to be built into a thin electronic device, and a method for manufacturing the same. The electrochemical device has: an element body on which a pair of internal electrodes are laminated so as to sandwich a separator sheet; an outer sheet covering the element body; sealing parts for sealing the peripheral edge of the outer sheet so that the element body is immersed in an electrolyte solution; and lead terminals electrically connected to either one of internal electrodes and leading out from the sealing parts of the outer sheet. At least a portion of a resin tape constituting the sealing parts, from which the lead terminals lead out, is thermally fused to an inside layer made from resin, which is present on the inner face of the outer sheet, in a position that does not overlap with the internal electrodes.Type: GrantFiled: February 3, 2017Date of Patent: February 2, 2021Assignee: TDK CORPORATIONInventors: Hiroaki Hasegawa, Hidetake Itoh, Yuji Yoshino, Kazunori Yoshikawa
-
Patent number: 10879016Abstract: An electrochemical device which includes: an element main body wherein a pair of internal electrodes are laminated so as to sandwich a separator sheet there between; an outer casing sheet that covers the element main body; sealing parts that hermetically seal the peripheral part of the outer casing sheet so that the element main body is immersed in an electrolyte solution; and lead terminals that are electrically connected to the internal electrodes respectively and are led out from the sealing parts of the outer casing sheet to the outside. A resin inner layer that is present in the inner surface of the outer casing sheet is provided with a fusion bonding part for separators, which partially bonds a part of the separator sheet to the inner surface of the outer casing sheet.Type: GrantFiled: December 26, 2016Date of Patent: December 29, 2020Assignee: TDK CORPORATIONInventors: Hiroaki Hasegawa, Yuji Yoshino, Kazunori Yoshikawa, Hidetake Itoh, Kazuhiro Anai, Yoshihiko Ohashi
-
Publication number: 20190267197Abstract: An electrochemical device includes an element body, an exterior sheet, a seal part, and a leading terminal. The element body includes a pair of inner electrodes laminated to sandwich a separator sheet. The exterior sheet covers the element body. The seal part seals a peripheral part of the exterior sheet for immersing the element body in an electrolyte. The leading terminal extends outward from the seal part of the exterior sheet. The exterior sheet includes a front sheet and a back sheet. The front sheet includes a front-side metal sheet. The back sheet includes a back-side metal sheet.Type: ApplicationFiled: February 12, 2019Publication date: August 29, 2019Applicant: TDK CORPORATIONInventors: Hiroaki HASEGAWA, Hidetake ITOH, Yoshihiko OHASHI, Yuji YOSHINO, Kazunori YOSHIKAWA
-
Publication number: 20190252130Abstract: An electrochemical device excellent in connection reliability is provided. An EDLC 2 includes: an element body 10 in which a pair of inner electrodes 16, 26 are laminated so as to sandwich a separator sheet 11; an exterior sheet 4 covering the element body 10; seal parts 40, 42 sealing peripheral parts of the exterior sheet 4 so that the element body 10 is immersed in an electrolyte; and lead terminals 18, 28 extending outward from the seal parts 40, 42 of the exterior sheet 4. At least one surface of the lead terminals 18, 28 is etched so as to form unevenness 180, 280.Type: ApplicationFiled: February 1, 2019Publication date: August 15, 2019Applicant: TDK CORPORATIONInventors: Hiroaki HASEGAWA, Hidetake ITOH, Yoshihiko OHASHI, Yuji YOSHINO, Kazunori YOSHIKAWA, Kiyonori HINOKI
-
Publication number: 20190043676Abstract: An electrochemical device, which can be thin enough to be built into a thin electronic device, and a method for manufacturing the same. The electrochemical device has: an element body on which a pair of internal electrodes are laminated so as to sandwich a separator sheet; an outer sheet covering the element body; sealing parts for sealing the peripheral edge of the outer sheet so that the element body is immersed in an electrolyte solution; and lead terminals electrically connected to either one of internal electrodes and leading out from the sealing parts of the outer sheet. At least a portion of a resin tape constituting the sealing parts, from which the lead terminals lead out, is thermally fused to an inside layer made from resin, which is present on the inner face of the outer sheet, in a position that does not overlap with the internal electrodes.Type: ApplicationFiled: February 3, 2017Publication date: February 7, 2019Applicant: TDK CORPORATIONInventors: Hiroaki HASEGAWA, Hidetake ITOH, Yuji YOSHINO, Kazunori YOSHIKAWA
-
Publication number: 20190013157Abstract: An electrochemical device which includes: an element main body wherein a pair of internal electrodes are laminated so as to sandwich a separator sheet there between; an outer casing sheet that covers the element main body; sealing parts that hermetically seal the peripheral part of the outer casing sheet so that the element main body is immersed in an electrolyte solution; and lead terminals that are electrically connected to the internal electrodes respectively and are led out from the sealing parts of the outer casing sheet to the outside. A resin inner layer that is present in the inner surface of the outer casing sheet is provided with a fusion bonding part for separators, which partially bonds a part of the separator sheet to the inner surface of the outer casing sheet.Type: ApplicationFiled: December 26, 2016Publication date: January 10, 2019Applicant: TDK CORPORATIONInventors: Hiroaki HASEGAWA, Yuji YOSHINO, Kazunori YOSHIKAWA, Hidetake ITOH, Kazuhiro ANAI, Yoshihiko OHASHI
-
Patent number: 9236632Abstract: An electrochemical device includes a wound laminated body with first and second electrodes, first and second separators, an electrolytic solution; and an outer package that houses the wound body and the electrolytic solution. The electrochemical device satisfies, at an outer end of the laminated body in a winding direction: the first and second separators protrude more outward in the winding direction than the second electrode; the first electrode protrudes more outward in the winding direction than the first and second separators; and an outer end of the first separator in the winding direction inclines toward a winding center and comes into contact with an upper surface of the second separator beyond the second electrode and an outer end of the first electrode in the winding direction inclines toward the winding center and comes into contact with the second separator and with the peripherally inner first electrode beyond the second electrode.Type: GrantFiled: February 17, 2011Date of Patent: January 12, 2016Assignee: TDK CORPORATIONInventors: Yoshihiko Ohashi, Hidetake Itoh, Kazuo Katai
-
Patent number: 9083013Abstract: In an electrochemical device having an element main body 1A enclosed in an exterior package 1B, a peripheral region of the exterior package 1B is provided with an elastic structure or a plurality of elastic structures R1, R2 having an elastic force in a thickness direction (Z-axis direction) of films. Each of the elastic structures R1, R2 has a first region of the exterior package 1B folded along a film outer edge, and a second region of the exterior package 1B opposed to the first region. Two ends R11, R13 (R21, R23) of the first region in a direction along the film outer edge are in contact with the second region, and between the two ends R11, R13 (R21, R23) there is a space (with a maximum height 2R) between the first region and the second region.Type: GrantFiled: July 22, 2011Date of Patent: July 14, 2015Assignee: TDK CORPORATIONInventors: Hidetake Itoh, Kazuo Katai, Yoshihiko Ohashi, Yosuke Miyaki, Akio Yamanaka, Hiroaki Hasegawa
-
Patent number: 8760840Abstract: A lead 3 of an electrochemical device includes a lead body 3A containing Al, and a bent metallic thin film 3a provided to a tip part of the lead body 3A. The metallic thin film 3a includes a thin film body 3a1 containing Ni, and a plating layer 3a2 containing Sn and covering at least an outer surface of the bent thin film body 3a1. A specific area of an inner surface of the bent thin film body 3a1 and a surface of the lead body 3A are welded in a predetermined area without the plating layer 3a2 being disposed there between.Type: GrantFiled: April 13, 2011Date of Patent: June 24, 2014Assignee: TDK CorporationInventors: Hiroaki Hasegawa, Hidetake Itoh, Yoshihiko Ohashi, Kazuo Katai, Yosuke Miyaki
-
Patent number: 8705225Abstract: An electric double layer capacitor comprising a plurality of electrode bodies comprising a positive electrode and a negative electrode laminated via a separator and being impregnated with an electrolyte solution, wherein the plurality of electrode bodies are electrically connected in series, the positive electrode and the negative electrode comprise an active material having pores, the electrolyte solution comprises an electrolyte having a cation and a counteranion of the cation, a ratio of an average pore diameter of the active material of the positive electrode to an ion diameter of the counteranion is in the range of 2.5 to 2.8, and a ratio of an average pore diameter of the active material of the negative electrode to an ion diameter of the cation is in the range of 1.65 to 1.85.Type: GrantFiled: March 29, 2010Date of Patent: April 22, 2014Assignee: TDK CorporationInventors: Yoshihiko Ohashi, Keita Kobayashi, Hidetake Itoh, Kazuo Katai
-
Patent number: 8530110Abstract: A lithium-ion secondary battery separator has a porous structure formed by laminating a second polymer layer, a first polymer layer, and a second polymer layer in sequence. The second polymer layer has a melting point lower than that of the first polymer layer. The second polymer layer has a higher molecular part formed on a side in contact with the first polymer layer and a lower molecular part formed on a side farther from the first polymer layer than is the higher molecular part. The higher and lower molecular parts have a weight-average molecular weight ratio (higher molecular part/lower molecular part) of 4 to 19 therebetween.Type: GrantFiled: November 16, 2009Date of Patent: September 10, 2013Assignee: TDK CorporationInventors: Katsuo Naoi, Kenji Nishizawa, Mitsuo Kougo, Yoshihiko Ohashi, Hidetake Itoh
-
Patent number: 8435669Abstract: An electro-chemical device comprises a package including a metal film, a battery element sealed within the package, resin layers disposed at least on the inside of a seal part of the package, and a lead extending from the battery element to the outside of the package through between the resin layers at the seal part of the package. The lead has a special form into which the resin of the resin layers bites, so that the lead is firmly buried in the resin layers, whereby the lead is fully inhibited from moving. Therefore, an electro-chemical device having a high quality can be obtained.Type: GrantFiled: October 4, 2010Date of Patent: May 7, 2013Assignee: TDK CorporationInventors: Naoto Tsukamoto, Hidetake Itoh, Yoshihiko Ohashi
-
Patent number: 8355308Abstract: An optical recording and reading method capable of enhancing the design flexibility of recording layers of an optical recording medium and performing accurate optical recording and reading operations. A basic recording layer is arranged in a position that is in the range of 90 ?m to 110 ?m away from a light incident surface of an optical recording medium, and recording layers are arranged in parallel with the basic recording layer. At least the position information of the recording layers is recorded in one of the basic recording layer and the recording layers.Type: GrantFiled: December 26, 2007Date of Patent: January 15, 2013Assignee: TDK CorporationInventors: Hidetake Itoh, Koji Mishima, Takashi Kikukawa
-
Publication number: 20130004814Abstract: An electrochemical device includes a wound laminated body with first and second electrodes, first and second separators, an electrolytic solution; and an outer package that houses the wound body and the electrolytic solution. The electrochemical device satisfies, at an outer end of the laminated body in a winding direction: the first and second separators protrude more outward in the winding direction than the second electrode; the first electrode protrudes more outward in the winding direction than the first and second separators; and an outer end of the first separator in the winding direction inclines toward a winding center and comes into contact with an upper surface of the second separator beyond the second electrode and an outer end of the first electrode in the winding direction inclines toward the winding center and comes into contact with the second separator and with the peripherally inner first electrode beyond the second electrode.Type: ApplicationFiled: February 17, 2011Publication date: January 3, 2013Applicant: TDK CORPORATIONInventors: Yoshihiko Ohashi, Hidetake Itoh, Kazuo Katai
-
Patent number: 8189443Abstract: A signal quality evaluation method is provided that can objectively evaluate signal quality regardless of a PRML detection method used. The signal quality evaluation method is used when recording and reading is performed by irradiating a medium with a laser beam having a wavelength of ? through an objective lens having a numerical aperture of NA. In the signal quality evaluation method, information of the difference between an ideal signal recoded in the medium and a real signal obtained by irradiating the medium with the laser beam is statistically analyzed for each signal level of the ideal signal. The evaluation of the quality of the real signal is made using the statistics obtained by the statistical analysis.Type: GrantFiled: May 5, 2008Date of Patent: May 29, 2012Assignee: TDK CorporationInventors: Takashi Kikukawa, Hidetake Itoh
-
Patent number: 8144561Abstract: A multilayer recording medium has a three-layered structure for an increased capacity, including an L0 layer, an L1 layer, and an L2 layer in order from the side farthest away from the incident surface of laser light. The recording layers are made of respective recording film materials selected so that the recording films of the recording layers have respective recording-reaction temperatures T0, T1, and T2, where T0?T1?T2 and T0<T2. This makes the recording sensitivities of the respective recording layers substantially the same and, by extension, the optimal recording powers of the laser light for the respective recording layers substantially the same so that the recording power of the laser light necessary for recording information on the L0 layer in particular is prevented from becoming excessively high.Type: GrantFiled: July 16, 2007Date of Patent: March 27, 2012Assignee: TDK CorporationInventors: Takashi Kikukawa, Koji Mishima, Hidetake Itoh
-
Publication number: 20120028109Abstract: In an electrochemical device having an element main body 1A enclosed in an exterior package 1B, a peripheral region of the exterior package 1B is provided with an elastic structure or a plurality of elastic structures R1, R2 having an elastic force in a thickness direction (Z-axis direction) of films. Each of the elastic structures R1, R2 has a first region of the exterior package 1B folded along a film outer edge, and a second region of the exterior package 1B opposed to the first region. Two ends R11, R13 (R21, R23) of the first region in a direction along the film outer edge are in contact with the second region, and between the two ends R11, R13 (R21, R23) there is a space (with a maximum height 2R) between the first region and the second region.Type: ApplicationFiled: July 22, 2011Publication date: February 2, 2012Applicant: TDK CORPORATIONInventors: Hidetake ITOH, Kazuo KATAI, Yoshihiko OHASHI, Yosuke MIYAKI, Akio YAMANAKA, Hiroaki HASEGAWA
-
Publication number: 20110253436Abstract: A lead 3 of an electrochemical device includes a lead body 3A containing Al, and a bent metallic thin film 3a provided to a tip part of the lead body 3A. The metallic thin film 3a includes a thin film body 3a1 containing Ni, and a plating layer 3a2 containing Sn and covering at least an outer surface of the bent thin film body 3a1. A specific area of an inner surface of the bent thin film body 3a1 and a surface of the lead body 3A are welded in a predetermined area without the plating layer 3a2 being disposed there between.Type: ApplicationFiled: April 13, 2011Publication date: October 20, 2011Applicant: TDK CORPORATIONInventors: Hiroaki HASEGAWA, Hidetake ITOH, Yoshihiko OHASHI, Kazuo KATAI, Yosuke MIYAKI
-
Patent number: 7940634Abstract: In a multilayer optical recording medium having three or more recording layers, when data is recorded on a recording layer far away from an incident surface of laser light, and especially on a recording layer farthest away from the incident surface of the laser light, by applying the laser light, the recording power margin of the farthest recording layer allows for a variation in the optimal recording sensitivity even if the transmittance of the recording layers located between the laser light incident surface side and the target recording layer is varied due to existing recordings and the amount of the laser light passing therethrough is also varied. In this case, the recording layer which is the farthest from an incident surface of laser light has a phase change recording film, and the recording layer which is the nearest from the incident surface of the laser light has a write-once read-multiple recording film.Type: GrantFiled: September 12, 2007Date of Patent: May 10, 2011Assignee: TDK CorporationInventors: Koji Mishima, Takashi Kikukawa, Hidetake Itoh