公开(公告)号：US20210217545A1

公开(公告)日：2021-07-15

申请号：US17254707

申请日：2019-07-02

Applicant: TDK Electronics AG

Inventor： Thomas Feichtinger ,  Michael Hofstätter ,  Hermann Grünbichler

IPC: H01C7/10 ,  H01C1/16

Abstract: In an embodiment a multilayer varistor includes a ceramic body made from a varistor material, wherein the ceramic body includes a plurality of inner electrodes, first regions and second regions, wherein the varistor material in the first regions has a first average grain size DA, wherein the varistor material in the second regions has a second average grain size DB, and wherein DA

公开(公告)号：US11195643B2

公开(公告)日：2021-12-07

申请号：US17254707

申请日：2019-07-02

Applicant: TDK Electronics AG

Inventor： Thomas Feichtinger ,  Michael Hofstätter ,  Hermann Grünbichler

IPC: H01C7/10 ,  H01C1/16

Abstract: In an embodiment a multilayer varistor includes a ceramic body made from a varistor material, wherein the ceramic body includes a plurality of inner electrodes, first regions and second regions, wherein the varistor material in the first regions has a first average grain size DA, wherein the varistor material in the second regions has a second average grain size DB, and wherein DA

公开(公告)号：US11901100B2

公开(公告)日：2024-02-13

申请号：US17638635

申请日：2021-07-26

Applicant: TDK Electronics AG

Inventor： Hermann Grünbichler ,  Jaromir Kotzurek ,  Franz Rinner

IPC: H01C7/10 ,  H01C7/102 ,  H01C7/112 ,  H01C7/18 ,  H01C17/065

CPC classification number: H01C7/1006 ,  H01C7/102 ,  H01C7/112 ,  H01C7/18 ,  H01C17/06546

Abstract: In an embodiment a method for manufacturing a multilayer varistor includes providing a first ceramic powder for producing a first ceramic material and at least one second ceramic powder for producing a second ceramic material, wherein the ceramic powders differ from each other in concentration of monovalent elements X+ by 50 ppm≤Δc(X+)≤5000 ppm, wherein X+=(Li+, Na+, K+ or Ag+), and wherein Δc denotes a maximum concentration difference occurring between an active region and a near-surface region of the multilayer varistor, slicking of the ceramic powders and forming of green films, partially printing of a part of the green films with a metal paste to form inner electrodes, stacking printed and unprinted green films, laminating, decarbonizing and sintering the green films and applying outer electrodes.

公开(公告)号：US20240153706A1

公开(公告)日：2024-05-09

申请号：US18413412

申请日：2024-01-16

Applicant: TDK Electronics AG

Inventor： Uwe Wozniak ,  Hermann Grünbichler

IPC: H01G4/12 ,  C04B35/447 ,  H01G4/012 ,  H01G4/30

CPC classification number: H01G4/1227 ,  C04B35/447 ,  H01G4/012 ,  H01G4/30 ,  C04B2235/3208 ,  C04B2235/3213 ,  C04B2235/3215 ,  C04B2235/3217 ,  C04B2235/3227 ,  C04B2235/3229 ,  C04B2235/3232 ,  C04B2235/3251 ,  C04B2235/3262 ,  C04B2235/3279 ,  C04B2235/447 ,  C04B2237/346

Abstract: A ceramic component having a ceramic main part containing AxByC1−x−vTi1−y+wO3*(Mn2P2O7)z*Du, in which A is a first dopant selected from a group including neodymium, praseodymium, cerium, and lanthanum, B is a second dopant selected from a group including niobium, tantalum, and vanadium, C is selected from a group including calcium, strontium, and barium, and D includes a metal selected from a group including aluminum, nickel, and iron. x is the proportion of A, y is the proportion of B, v is the proportion of A vacancies, w is the proportion of excess titanium, z is the proportion of Mn2P2O7, u is the proportion of D, and the following applies: 0.0≤x

公开(公告)号：US20220005648A1

公开(公告)日：2022-01-06

申请号：US17283364

申请日：2020-04-24

Applicant: TDK Electronics AG

Inventor： Uwe Wozniak ,  Hermann Grünbichler

IPC: H01G4/12 ,  H01G4/012 ,  H01G4/30 ,  C04B35/447

Abstract: A ceramic component having a ceramic main part containing AxByC1−x−vTi1—y+wO3* (Mn2P2O7)z*Du, in which A is a first dopant selected from a group including neodymium, praseodymium, cerium, and lanthanum, B is a second dopant selected from a group including niobium, tantalum, and vanadium, C is selected from a group including calcium, strontium, and barium, and D includes a metal selected from a group including aluminum, nickel, and iron. x is the proportion of A, y is the proportion of B, v is the proportion of A vacancies, w is the proportion of excess titanium, z is the proportion of Mn2P2O7, u is the proportion of D, and the following applies: 0.0≤x≤0.1, 0.0≤y

公开(公告)号：US11915872B2

公开(公告)日：2024-02-27

申请号：US17283364

申请日：2020-04-24

Applicant: TDK Electronics AG

Inventor： Uwe Wozniak ,  Hermann Grünbichler

IPC: C04B35/465 ,  C04B35/447 ,  H01G4/12 ,  H01G4/012 ,  H01G4/30

CPC classification number: H01G4/1227 ,  C04B35/447 ,  H01G4/012 ,  H01G4/30 ,  C04B2235/3208 ,  C04B2235/3213 ,  C04B2235/3215 ,  C04B2235/3217 ,  C04B2235/3227 ,  C04B2235/3229 ,  C04B2235/3232 ,  C04B2235/3251 ,  C04B2235/3262 ,  C04B2235/3279 ,  C04B2235/447 ,  C04B2237/346

Abstract: A ceramic component having a ceramic main part containing AxByC1−x−vTi1−y+wO3*(Mn2P2O7)z*Du, in which A is a first dopant selected from a group including neodymium, praseodymium, cerium, and lanthanum, B is a second dopant selected from a group including niobium, tantalum, and vanadium, C is selected from a group including calcium, strontium, and barium, and D includes a metal selected from a group including aluminum, nickel, and iron. x is the proportion of A, y is the proportion of B, v is the proportion of A vacancies, w is the proportion of excess titanium, z is the proportion of Mn2P2O7, u is the proportion of D, and the following applies: 0.0≤x

公开(公告)号：US20220406493A1

公开(公告)日：2022-12-22

申请号：US17638635

申请日：2021-07-26

Applicant: TDK Electronics AG

Inventor： Hermann Grünbichler ,  Jaromir Kotzurek ,  Franz Rinner

IPC: H01C7/10 ,  H01C7/102 ,  H01C7/112 ,  H01C17/065 ,  H01C7/18

Abstract: In an embodiment a method for manufacturing a multilayer varistor includes providing a first ceramic powder for producing a first ceramic material and at least one second ceramic powder for producing a second ceramic material, wherein the ceramic powders differ from each other in concentration of monovalent elements X+ by 50 ppm≤Δc(X+)≤5000 ppm, wherein X+=(Li+, Na+, K+ or Ag+), and wherein Δc denotes a maximum concentration difference occurring between an active region and a near-surface region of the multilayer varistor, slicking of the ceramic powders and forming of green films, partially printing of a part of the green films with a metal paste to form inner electrodes, stacking printed and unprinted green films, laminating, decarbonizing and sintering the green films and applying outer electrodes.