US 12,334,235 B2
Multilayer varistor
Yuto Akiyama, Hokkaido (JP); Ryosuke Usui, Hokkaido (JP); and Ken Yanai, Hokkaido (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
Filed on Dec. 12, 2022, as Appl. No. 18/064,650.
Claims priority of application No. 2021-207375 (JP), filed on Dec. 21, 2021.
Prior Publication US 2023/0197321 A1, Jun. 22, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H01C 7/112 (2006.01); H01C 7/18 (2006.01)
CPC H01C 7/112 (2013.01) [H01C 7/18 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A multilayer varistor comprising:
a sintered body;
a first internal electrode and a second internal electrode which are disposed in the sintered body;
a first external electrode disposed on a surface of the sintered body and electrically connected to the first internal electrode;
a second external electrode disposed on the surface of the sintered body and electrically connected to the second internal electrode; and
a high-resistance layer covering at least part of the surface of the sintered body, wherein:
the high-resistance layer has a surface having a plurality of cracks, and
an arithmetic mean value of lengths of the plurality of cracks is greater than or equal to 10 μm and less than or equal to 50 μm.