Ceramic element and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-9950965-B2
Application number	US-201414153472-A
Country	US
Kind code	B2
Filing date	Jan 13, 2014
Priority date	Jan 18, 2013
Publication date	Apr 24, 2018
Grant date	Apr 24, 2018

Abstract

A ceramic element includes: a ceramic body; a first coating layer disposed on a first part of a front surface of the ceramic body; and a second coating layer disposed on a second part of a back surface of the ceramic body. The first coating layer continuously extends from the front surface to a first region of a side surface of the ceramic body, the side surface being a machined surface, and the first region being a front side region of the side surface. The second coating layer continuously extends from the back surface to a second region of the side surface of the ceramic body, the second region being a back side region of the side surface. In the machined surface, one of the first and second coating layers is disposed at least partially on the other of the first and second coating layers.

First claim

The invention claimed is:

1. A ceramic element comprising:
a ceramic body including one or more laminated ceramic layers;
a first coating layer disposed on a first part of a front surface of the ceramic body; and
a second coating layer disposed on a second part of a back surface of the ceramic body; wherein
the first coating layer continuously extends from the front surface of the ceramic body to a first region of a side surface of the ceramic body, the side surface being a machined surface, and the first region being a region extending towards the back surface from a boundary between the side and front surfaces of the ceramic body,
the second coating layer continuously extends from the back surface of the ceramic body to a second region of the side surface of the ceramic body, the second region being a region extending towards the front surface from a boundary between the side and back surfaces of the ceramic body, and
on the machined surface of the ceramic body, one of the first and second coating layers is disposed partially on the other of the first and second coating layers.

2. The ceramic element as in claim 1 , wherein
in a planar view, the ceramic body has a rectangular shape, and
the first coating layer is disposed on at least four corners of the front surface of the ceramic body.

3. The ceramic element as in claim 2 , wherein
the first coating layer is disposed along peripheral edges of the front surface of the ceramic body.

4. A ceramic element comprising:
a ceramic body including one or more laminated ceramic layers;
an electrode formed on at least one of front and back surfaces of the ceramic body; and
a coating layer disposed on a part of the front surface of the ceramic body;
wherein the coating layer is a resin and continuously extends beyond a boundary between side and back surfaces of the ceramic body, reaches a peripheral part of the back surface of the ceramic body, and is disposed on the entire side surface which is a machined surface, and
wherein, in a cross-section perpendicular to a thickness of the ceramic body, a width of the coating layer disposed on the back surface of the ceramic body in a direction parallel to the back surface of the ceramic body is less than a width of the coating layer disposed on the front surface of the ceramic body in a direction parallel to the front surface of the ceramic body.

Assignees

• Ngk Insulators Ltd

Inventors

• Uetani Masayuki
• Hattori Masaki

Classifications

• Y10T428/23

  Sheet including cover or casing · CPC title

• H01L41/23

  Electricity · mapped topic

• H01L41/083

  Electricity · mapped topic

• Y10T428/239

  Complete cover or casing · CPC title

• H01L41/331

  Electricity · mapped topic