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公开(公告)号:US20220076892A1
公开(公告)日:2022-03-10
申请号:US17467841
申请日:2021-09-07
Applicant: KEMET Electronics Corporation
Inventor: John Bultitude , Nathan A. Reed , Allen Templeton , James R. Magee , James Davis , Abhijit Gurav , Hunter Hayes , Hanzheng Guo
IPC: H01G4/30 , H01G4/12 , H01G4/40 , C04B35/465
Abstract: Provided is an improved multilayered ceramic capacitor and an electronic device comprising the multilayered ceramic capacitor. The multilayer ceramic capacitor comprises first conductive plates electrically connected to first external terminations and second conductive plates electrically connected to second external terminations. The first conductive plates and second conductive plates form a capacitive couple. A ceramic portion is between the first conductive plates and said second conductive plates wherein the ceramic portion comprises paraelectric ceramic dielectric. The multilayer ceramic capacitor has a rated DC voltage and a rated AC VPP wherein the rated AC VPP is higher than the rated DC voltage.
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公开(公告)号:US12040135B2
公开(公告)日:2024-07-16
申请号:US18107154
申请日:2023-02-08
Applicant: KEMET Electronics Corporation
Inventor: John Bultitude , Nathan A. Reed , Allen Templeton , James R. Magee , James Davis , Abhijit Gurav , Hunter Hayes , Hanzheng Guo
IPC: H01G4/12 , C04B35/465 , C04B35/495 , C04B35/50 , H01G4/30 , H01G4/40
CPC classification number: H01G4/1245 , C04B35/465 , C04B35/495 , C04B35/50 , H01G4/1227 , H01G4/30 , H01G4/306 , H01G4/40 , C04B2235/66
Abstract: Provided is an improved multilayered ceramic capacitor and an electronic device comprising the multilayered ceramic capacitor. The multilayer ceramic capacitor comprises first conductive plates electrically connected to first external terminations and second conductive plates electrically connected to second external terminations. The first conductive plates and second conductive plates form a capacitive couple. A ceramic portion is between the first conductive plates and said second conductive plates wherein the ceramic portion comprises paraelectric ceramic dielectric. The multilayer ceramic capacitor has a rated DC voltage and a rated AC VPP wherein the rated AC VPP is higher than the rated DC voltage.
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公开(公告)号:US20220238277A1
公开(公告)日:2022-07-28
申请号:US17586027
申请日:2022-01-27
Applicant: KEMET Electronics Corporation
Inventor: Hanzheng Guo , Abhijit Gurav
Abstract: This invention relates to a multilayer ceramic capacitor produced by alternatively stacking the ceramic dielectric layers and internal electrodes mainly comprise base metals. The present dielectric ceramic composition having a main component with a perovskite structure ABO3 formula of: (KxNayLizA1-x-y-z)m(NbuTavBw)O3 wherein: A is at least one selected from the alkaline earth element group of Ca, Sr, and Ba; B is at least one selected from the group of Ti, Zr, Hf and Sn; and wherein: x, y, z, u, v, and w are molar fractions of respective elements, and m is the molar ratio of A-site and B-site elements. They are in the following respective range: 0.95≤m≤1.05; 0.05≤x≤0.90; 0.05≤y≤0.90; 0.00≤z≤0.12 0
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公开(公告)号:US11621126B2
公开(公告)日:2023-04-04
申请号:US17467841
申请日:2021-09-07
Applicant: KEMET Electronics Corporation
Inventor: John Bultitude , Nathan A. Reed , Allen Templeton , James R. Magee , James Davis , Abhijit Gurav , Hunter Hayes , Hanzheng Guo
IPC: H01G4/12 , C04B35/465 , H01G4/30 , C04B35/50 , C04B35/495 , H01G4/40
Abstract: Provided is an improved multilayered ceramic capacitor and an electronic device comprising the multilayered ceramic capacitor. The multilayer ceramic capacitor comprises first conductive plates electrically connected to first external terminations and second conductive plates electrically connected to second external terminations. The first conductive plates and second conductive plates form a capacitive couple. A ceramic portion is between the first conductive plates and said second conductive plates wherein the ceramic portion comprises paraelectric ceramic dielectric. The multilayer ceramic capacitor has a rated DC voltage and a rated AC VPP wherein the rated AC VPP is higher than the rated DC voltage.
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公开(公告)号:US20220076886A1
公开(公告)日:2022-03-10
申请号:US17467995
申请日:2021-09-07
Applicant: KEMET Electronics Corporation
Inventor: Hanzheng Guo , Abhijit Gurav
IPC: H01G4/12 , H01G4/30 , C04B35/465 , C04B35/495 , C04B35/50
Abstract: a dielectric ceramic composition comprising a main component comprising an oxide represented by: UaXbYcZd((Ca1-x-ySrxMy)m(Zr1-u-vTiuHfv)O3)1-a-b-c-d wherein the elements defined by U, X, Y, Z and M and subscripts a, b, c, d, x, y, m, u and v are defined.
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公开(公告)号:US11802087B2
公开(公告)日:2023-10-31
申请号:US17585770
申请日:2022-01-27
Applicant: KEMET Electronics Corporation
Inventor: Hanzheng Guo , Abhijit Gurav
CPC classification number: C04B35/495 , C04B37/003 , H01G4/1209 , H01G4/248 , H01G4/30 , C04B2235/3225 , C04B2235/3227 , C04B2235/3232 , C04B2235/3244 , C04B2235/3255 , C04B2235/3258 , C04B2235/3267 , C04B2235/3409 , C04B2235/3418 , C04B2235/3454 , C04B2235/442 , C04B2235/445 , C04B2235/9607 , C04B2237/123 , C04B2237/345 , H01G4/008
Abstract: The present invention discloses a dielectric ceramic formula enabling one to obtain a multilayer ceramic capacitor by alternatively stacking the ceramic dielectric layers and base metal internal electrodes. The dielectric ceramic composition comprises a primary ingredient:
[(Na1-xKx)sA1-s]m[(Nb1-yTay)uB1vB2w)]O3
wherein:
A, B1, B2, x, y, s, u, v, w and m are defined.-
公开(公告)号:US20220234958A1
公开(公告)日:2022-07-28
申请号:US17585770
申请日:2022-01-27
Applicant: KEMET Electronics Corporation
Inventor: Hanzheng Guo , Abhijit Gurav
IPC: C04B35/495 , C04B37/00 , H01G4/30 , H01G4/12 , H01G4/248
Abstract: The present invention discloses a dielectric ceramic formula enabling one to obtain a multilayer ceramic capacitor by alternatively stacking the ceramic dielectric layers and base metal internal electrodes. The dielectric ceramic composition comprises a primary ingredient: [(Na1-xKx)sA1-s]m[(Nb1-yTay)uB1vB2w)]O3 wherein: A is at least one selected from the alkaline-earth element group of Mg, Ca, Sr, and Ba; B1 is at least one selected from the group of Ti, Zr, Hf and Sn; B2 is at least one selected from transition metal elements; and wherein: x, y, s, u, v, and w are molar fractions of respective elements, and m is the molar ratio of [(Na1-xKx)sA1-s] and [(Nb1-yTay)uB1vB2w)]. They are in the following respective range: 0.93≤m≤1.07; 0.7≤s≤1.0; 0.00≤x≤0.05; 0.00≤y≤0.65; 0.7≤u≤1.0; 0.0≤v≤0.3; 0.001≤w≤0.100; a first sub-component composes of at least one selected from the rare-earth compound, wherein the rare-earth element is no more than 10 mol % parts with respect to the main component; and a second sub-component composes a compound with low melting temperature to assist the ceramic sintering process, said frit, which is Li free and could be at least one selected from fluorides, silicates, borides, and oxides. The content of frit is within the range of 0.01 mol % to 15.00 mol % parts with respect to the main component.
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公开(公告)号:US11935698B2
公开(公告)日:2024-03-19
申请号:US17586027
申请日:2022-01-27
Applicant: KEMET Electronics Corporation
Inventor: Hanzheng Guo , Abhijit Gurav
CPC classification number: H01G4/1227 , C04B35/4682 , C04B35/64 , H01G4/008 , H01G4/012 , H01G4/30
Abstract: This invention relates to a multilayer ceramic capacitor produced by alternatively stacking the ceramic dielectric layers and internal electrodes mainly comprise base metals. The present dielectric ceramic composition having a main component with a perovskite structure ABO3 formula of:
(KxNayLizA1-x-y-z)m(NbuTav)O3
wherein:
A, B, x, y, z, u, v, w, m, u, v and w are defined further.
The dielectric ceramic composition further contains:
a first accessory ingredient composes at least one selected from the rare-earth compounds; a second accessory ingredient composes at least one selected from transition metal compounds; and a third accessory ingredient.-
公开(公告)号:US11646156B2
公开(公告)日:2023-05-09
申请号:US17467995
申请日:2021-09-07
Applicant: KEMET Electronics Corporation
Inventor: Hanzheng Guo , Abhijit Gurav
IPC: H01G4/12 , C04B35/50 , H01G4/30 , C04B35/495 , C04B35/465 , H01G4/40
CPC classification number: H01G4/1245 , C04B35/465 , C04B35/495 , C04B35/50 , H01G4/1227 , H01G4/30 , H01G4/306 , H01G4/40 , C04B2235/66
Abstract: A dielectric ceramic composition comprising a main component comprising an oxide represented by:
UaXbYcZd((Ca1-x-ySrxMy)m(Zr1-u-vTiuHfv)O3)1-a-b-c-d
wherein the elements defined by U, X, Y, Z and M and subscripts a, b, c, d, x, y, m, u and v are defined.
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