公开(公告)号：US20250015298A1

公开(公告)日：2025-01-09

申请号：US18712312

申请日：2022-11-17

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Shunpei YAMAZAKI ,  Tetsuya KAKEHATA ,  Tetsuji ISHITANI ,  Kazutaka KURIKI ,  Masayuki KIMURA ,  Yasuhiro JINBO

IPC: H01M4/66 ,  H01M4/02 ,  H01M4/62 ,  H01M10/0525

Abstract: A secondary battery that can inhibit degradation of an electrode is provided. A flexible secondary battery is provided. A flexible secondary battery includes a positive electrode, a negative electrode, and an exterior body surrounding the positive electrode and the negative electrode. The positive electrode includes a positive electrode current collector and a positive electrode active material layer provided over the positive electrode current collector. The negative electrode includes a negative electrode current collector and a negative electrode active material layer provided over the negative electrode current collector. One or both of the positive electrode current collector and the negative electrode current collector have rubber elasticity.

公开(公告)号：US20240429381A1

公开(公告)日：2024-12-26

申请号：US18692527

申请日：2022-09-09

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Jo SAITO ,  Atsushi KAWATSUKI ,  Yohei MOMMA ,  Shuhei YOSHITOMI ,  Kenta NAKANISHI ,  Tetsuya KAKEHATA

IPC: H01M4/525 ,  C01G51/00 ,  H01M10/0525 ,  H01M10/0569

Abstract: A method for forming a positive electrode active material that can be used for a lithium ion battery having excellent discharge characteristics even in a low-temperature environment is provided. The method includes a first step in which lithium cobalt oxide with a median diameter (D50) of less than or equal to 10 μm is heated at a temperature higher than or equal to 700° C. and lower than or equal to 1000° C. for longer than or equal to 1 hour and shorter than or equal to 5 hours, a second step in which a first mixture is formed by mixing a fluorine source and a magnesium source to the lithium cobalt oxide subjected to the first step, a third step in which the first mixture is heated at a temperature higher than or equal to 800° C. and lower than or equal to 1100° C. for longer than or equal to 1 hour and shorter than or equal to 10 hours, a fourth step in which a second mixture is formed by mixing a nickel source and an aluminum source to the first mixture subjected to the third step, and a fifth step in which the second mixture is heated at a temperature higher than or equal to 800° C. and lower than or equal to 950° C. for longer than or equal to 1 hour and shorter than or equal to 5 hours.

公开(公告)号：US20240283023A1

公开(公告)日：2024-08-22

申请号：US18557127

申请日：2022-04-15

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Kazutaka KURIKI ,  Yumiko YONEDA ,  Yoshiharu ASADA ,  Tetsuya KAKEHATA

IPC: H01M10/0567 ,  H01G11/46 ,  H01G11/50 ,  H01G11/62 ,  H01M4/02 ,  H01M4/131 ,  H01M4/525 ,  H01M10/0525

CPC classification number: H01M10/0567 ,  H01G11/46 ,  H01G11/50 ,  H01G11/62 ,  H01M4/131 ,  H01M4/525 ,  H01M10/0525 ,  H01M2004/028 ,  H01M2300/0025

Abstract: A lithium-ion secondary battery with a high capacity and excellent charge and discharge cycle performance is provided. A secondary battery with a high capacity is provided. A secondary battery whose shape hardly changes in a vacuum is provided. A bendable secondary battery is provided. The secondary battery contains a positive electrode active material and an electrolyte; the positive electrode active material is lithium cobalt oxide to which magnesium is added; magnesium has a gradient in which a concentration increases from an inner portion toward a surface of the positive electrode active material; the electrolyte contains an imidazolium salt; and a temperature range where the secondary battery can operate is higher than or equal to −20° C. and lower than or equal to 100° C.

公开(公告)号：US20240092655A1

公开(公告)日：2024-03-21

申请号：US18263740

申请日：2022-01-21

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Shunpei YAMAZAKI ,  Yusuke YOSHITANI ,  Yohei MOMMA ,  Kunihiro FUKUSHIMA ,  Tetsuya KAKEHATA

IPC: C01G51/00

CPC classification number: C01G51/42

Abstract: A novel method for forming a positive electrode active material is provided. In the method for forming a positive electrode active material, a cobalt source and an additive element source are mixed to form an acidic solution; the acidic solution and an alkaline solution are made to react to form a cobalt compound; the cobalt compound and a lithium source are mixed to form a mixture; and the mixture is heated. The additive element source is a compound containing one or more selected from gallium, aluminum, boron, nickel, and indium.

公开(公告)号：US20230387394A1

公开(公告)日：2023-11-30

申请号：US18249901

申请日：2021-10-13

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Shunpei YAMAZAKI ,  Tetsuya KAKEHATA ,  Shuhei YOSHITOMI ,  Atsushi KAWATSUKI

IPC: H01M4/36 ,  H01M4/525 ,  H01M4/58 ,  H01M4/48 ,  C01G53/00 ,  C01F7/02 ,  C01G49/00

CPC classification number: H01M4/366 ,  H01M4/525 ,  H01M4/5825 ,  H01M4/483 ,  C01G53/66 ,  C01F7/02 ,  C01G49/009 ,  H01M2004/028

Abstract: A positive electrode active material that is stable in a high potential state or a high temperature state and a highly safe secondary battery are provided. The positive electrode includes a first material and a second material and includes a region where at least part of a surface of the first material is covered with the second material. The first material includes a lithium cobalt oxide containing magnesium, fluorine, aluminum, and nickel. The second material includes a composite oxide (containing one or more selected from Fe, Ni, Co, and Mn) having an olivine crystal structure.

公开(公告)号：US20230155032A1

公开(公告)日：2023-05-18

申请号：US17910372

申请日：2021-03-11

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Shunpei YAMAZAKI ,  Tetsuya KAKEHATA ,  Yasuhiro JINBO ,  Yuji EGI ,  Fumito ISAKA ,  Shuntaro KOCHI ,  Masahiro TAKAHASHI

IPC: H01L29/786 ,  H01L29/24 ,  H01L29/66

CPC classification number: H01L29/7869 ,  H01L29/24 ,  H01L29/66969

Abstract: A semiconductor device with a small variation in characteristics is provided. The semiconductor device includes an oxide, a first conductor and a second conductor over the oxide, a first insulator over the first conductor, a second insulator over the second conductor, a third insulator over the first insulator and the second insulator, a fourth insulator over the third insulator, a fifth insulator that is over the oxide and is located between the first conductor and the second conductor; a sixth insulator over the fifth insulator; a seventh insulator over the sixth insulator, and a third conductor over the seventh insulator. The third conductor includes a region overlapping with the oxide, the fifth insulator has a region that is in contact with each of the oxide, the first conductor, the second conductor, and the first to fourth insulators, and the sixth insulator contains hydrogen, nitrogen, oxygen, and silicon.

公开(公告)号：US20210320193A1

公开(公告)日：2021-10-14

申请号：US17271716

申请日：2019-08-30

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Shunpei YAMAZAKI ,  Naoki OKUNO ,  Tetsuya KAKEHATA ,  Hiroki KOMAGATA ,  Yuji EGI

IPC: H01L29/66 ,  H01L21/02

Abstract: A semiconductor device having favorable electrical characteristics is provided. A manufacturing method of the semiconductor device includes the steps of forming a first oxide over a substrate; depositing a first insulator over the first oxide; forming an opening reaching the first oxide in the first insulator; depositing a first oxide film in contact with the first oxide and the first insulator in the opening; depositing a first insulating film over the first oxide film by a PEALD method; depositing a first conductive film over the first insulating film; and removing part of the first oxide film, part of the first insulating film, and part of the first conductive film until a top surface of the first insulator is exposed to form a second oxide, a second insulator, and a first conductor. The deposition of the first insulating film is performed while the substrate is heated to higher than or equal to 300° C., and a step of introducing a first gas containing silicon into a chamber and a step of introducing a second gas that contains oxygen radicals and does not contain hydrogen atoms into the chamber are included.

公开(公告)号：US20210233769A1

公开(公告)日：2021-07-29

申请号：US16972413

申请日：2019-05-31

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Shunpei YAMAZAKI ,  Tetsuya KAKEHATA ,  Yuji EGI ,  Yasuhiro JINBO ,  Yujiro SAKURADA

IPC: H01L21/02

Abstract: A semiconductor device having favorable electrical characteristics is provided. A metal oxide is formed over a substrate by the steps of: introducing a first precursor into a chamber in which the substrate is provided; introducing a first oxidizer after the introduction of the first precursor; introducing a second precursor after the introduction of the first oxidizer; and introducing a second oxidizer after the introduction of the second precursor.

公开(公告)号：US20240413324A1

公开(公告)日：2024-12-12

申请号：US18703508

申请日：2022-10-14

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Seiya SAITO ,  Tetsuya KAKEHATA ,  Kazutaka KURIKI ,  Taisuke NAKAO ,  Kenji ARAI

IPC: H01M4/525 ,  H01M4/02 ,  H01M10/0525 ,  H01M10/0569

Abstract: A lithium ion battery having excellent discharge characteristics even at a temperature below freezing is provided. The lithium ion battery includes a positive electrode containing a positive electrode active material, an electrolyte solution, and a negative electrode containing a negative electrode active material that is a carbon material; the carbon material has peaks at 2θ of greater than or equal to 20° and less than or equal to 24°, 2θ of greater than or equal to 42° and less than or equal to 46.5°, and 2θ of greater than or equal to 78° and less than or equal to 82° in X-ray diffraction (XRD) analysis; and a value of the discharge capacity obtained by subjecting the lithium ion battery to constant current and constant voltage charging (0.1 C, 4.5 V, and a termination current of 0.01 C) at 25° C. and then discharging at −40° C. is higher than or equal to 40% of a value of the discharge capacity in discharging at 25° C.

公开(公告)号：US20240169539A1

公开(公告)日：2024-05-23

申请号：US18282910

申请日：2022-03-17

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Shunpei YAMAZAKI ,  Tetsuya KAKEHATA

IPC: G06T7/00 ,  A61B5/00 ,  A61B5/107 ,  A61B5/11 ,  A61B5/16 ,  G06F3/01 ,  G09B5/06 ,  G09B5/14 ,  H04R1/10

CPC classification number: G06T7/0016 ,  A61B5/0077 ,  A61B5/1072 ,  A61B5/1079 ,  A61B5/1103 ,  A61B5/163 ,  A61B5/165 ,  A61B5/6803 ,  A61B5/7264 ,  A61B5/742 ,  G06F3/013 ,  G06T2207/20081 ,  G06T2207/20084 ,  G06T2207/30041 ,  G09B5/065 ,  G09B5/14 ,  H04R1/1041

Abstract: An electronic device capable of estimating a user's situation is to be provided. The electronic device includes a camera, a processing portion, and a display portion. The camera has a function of capturing an image of a user's eye and his/her periphery repeatedly to generate a plurality of pieces image data. The processing portion has a function of detecting, from the plurality of pieces of image data, a change over time in information including at least one of a frequency of eye blinks, a time taken for one blink, a distance between an upper eyelid and a lower eyelid, a sight direction, and an area of a pupil, a function of estimating a level of user's eye fatigue on the basis of the change over time in information, and a function of generating string information in accordance with the estimated level of user's eye fatigue. The display portion has a function of displaying string information.