Tdk Corporation

Hidetake Itoh

Kazushi Tanaka

Takashi Kikukawa

Naoki Hayashida

Yoshihiko Ohashi

Koji Mishima

Hiroaki Hasegawa

Kazuo Katai

Kazunori Yoshikawa

Yuji Yoshino

Kenji Yoneyama

Hiroshi Take

Yosuke Miyaki

Rie Ihara

Tsuyoshi Komaki

Tsutomu Aoyama

Daisuke Yoshitoku

Katsuo Naoi

Keita Kobayashi

Mitsuo Kougo

Naoto Tsukamoto

Kenji Nishizawa

Kentaro Iida

Kazuhiro Anai

Akio Yamanaka

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.

Electrochemical device

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.

Electrochemical device and method for manufacturing same

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.

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.

Electrochemical device and method for manufacturing electrochemical device

In an electrochemical device having an element main bodyA enclosed in an exterior packageB, a peripheral region of the exterior packageB is provided with an elastic structure or a plurality of elastic structures R, Rhaving an elastic force in a thickness direction (Z-axis direction) of films. Each of the elastic structures R, Rhas a first region of the exterior packageB folded along a film outer edge, and a second region of the exterior packageB opposed to the first region. Two ends R, R(R, R) of the first region in a direction along the film outer edge are in contact with the second region, and between the two ends R, R(R, R) there is a space (with a maximum height 2R) between the first region and the second region.

A leadof an electrochemical device includes a lead bodyA containing Al, and a bent metallic thin filmprovided to a tip part of the lead bodyA. The metallic thin filmincludes a thin film bodycontaining Ni, and a plating layercontaining Sn and covering at least an outer surface of the bent thin film body. A specific area of an inner surface of the bent thin film bodyand a surface of the lead bodyA are welded in a predetermined area without the plating layerbeing disposed there between.

Electrochemical device and manufacturing method thereof, circuit board and housing tray

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.

Electric double layer capacitor with non-equal areas of the active material layers of the positive electrode and the negative electrode

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.

Lithium-ion secondary battery separator and lithium-ion secondary battery

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.

Electro-chemical device and method for manufacturing the same

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 &#x3bc;m to 110 &#x3bc;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.

Optical recording medium and recording and reading method of optical recording medium

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 &#x3bb; 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.

Method for evaluating signal in optical recording and reading and method for optical recording and reading

A multilayer recording medium has a three-layered structure for an increased capacity, including an Llayer, an Llayer, and an Llayer 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 T, T, and T, where T&#x2266;T&#x2266;Tand T&#x3c;T. 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 Llayer in particular is prevented from becoming excessively high.

Multilayer optical recording medium

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.

Multilayer optical recording medium and recording method on multilayer optical recording medium

When there is a defect area in a specific recording layer, recording of information is continued to restrain reduction in a recording rate. In an optical recording method for recording information on a multilayer optical recording medium having a plurality of recording layers by irradiating the recording layer with a beam spot, when a defect area is detected while the information is recorded on a specific recording layer selected from the plurality of recording layers, an escape recording layer which is selected from among the other recording layers except for the specific recording layer is irradiated with the beam spot to continue recording the information.

Optical recording method on multilayer optical recording medium and optical recording apparatus

A hardcoat agent composition comprising a fluorine-containing polyether compound (A) having a perfluoropolyether unit, urethane bond and active energy ray reactive group and a curable compound (B) having equal to or more than 2 active energy ray polymerizing groups in the molecule. An optical information medium having a film substance composed of single or multiple layers containing at least the recording layeror the reflecting layer on the supporting substrate, the optical information medium wherein at least either the surface of the supporting substrateor that of the above-mentioned film substance is formed by the hardcoat layercontaining a curable substance of the above-mentioned hardcoat agent composition.

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Tokyo, Japan

Hidetake Itoh