Patent ID: 11901100
Assignee: TDK ELECTRONICS AG
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 13:
14. A multilayer varistor comprising:
a ceramic body having a plurality of inner electrodes, an active region and a near-surface region, at least one first ceramic material and at least one second ceramic material,
wherein the ceramic materials differ from each other in a concentration of monovalent elements X+ by a maximum of 50 ppm≤Δc(X+)≤5000 ppm,
wherein X+=(Li+, Na+, K+ or Ag+),
wherein Δc denotes a maximum concentration difference occurring between the active region and the near-surface region,
wherein the ceramic body comprises at least three ceramic materials, and
wherein a third ceramic material is arranged between the first ceramic material and the second ceramic material.