US Patent Application 18324344. MULTILAYER CERAMIC ELECTRONIC DEVICE simplified abstract

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MULTILAYER CERAMIC ELECTRONIC DEVICE

Organization Name

TDK CORPORATION

Inventor(s)

Toshihiro Iguchi of Tokyo (JP)

Shinya Saito of Tokyo (JP)

Ayako Sato of Tokyo (JP)

Yasuo Watanabe of Tokyo (JP)

Takehisa Tamura of Tokyo (JP)

Kenya Tamaki of Tokyo (JP)

MULTILAYER CERAMIC ELECTRONIC DEVICE - A simplified explanation of the abstract

This abstract first appeared for US patent application 18324344 titled 'MULTILAYER CERAMIC ELECTRONIC DEVICE

Simplified Explanation

The patent application describes a multilayer ceramic electronic device with an element body and external electrodes.

  • The device includes a ceramic layer and an internal electrode layer within the element body.
  • The external electrode is formed on the outer surface of the element body and is connected to part of the internal electrode layer.
  • The external electrode consists of two layers: a first layer in direct contact with the element body and a second layer on top of the first layer.
  • The first layer contains a combination of a first insulator phase and first metal phases, while the second layer contains a second insulator phase and second metal phases.
  • The area ratio of the first metal phases in the first layer is between 8% and 30%.
  • The area ratio of the second metal phases in the second layer is higher than the area ratio of the first metal phases in the first layer.
  • The first metal phases in the first layer have an average aspect ratio of 3.5 or more.


Original Abstract Submitted

A multilayer ceramic electronic device includes an element body including a ceramic layer and an internal electrode layer, and an external electrode formed on an outer surface of the element body and electrically connected to part of the internal electrode layer. The external electrode includes a first layer in direct contact with the element body and containing a first insulator phase and first metal phases, and a second layer in contact with an outer surface of the first layer and containing a second insulator phase and second metal phases. An area ratio of the first metal phases in the first layer is more than 8% and 30% or less. An area ratio of the second metal phases in the second layer is larger than the area ratio of the first metal phases in the first layer. The first metal phases have an average aspect ratio of 3.5 or more.

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