Electronic device having first and second metal terminals

Patent metadata

Field	Value
Publication number	US-12417880-B2
Application number	US-202217888219-A
Country	US
Kind code	B2
Filing date	Aug 15, 2022
Priority date	Aug 27, 2021
Publication date	Sep 16, 2025
Grant date	Sep 16, 2025

Abstract

An electronic device includes a case, a ceramic element, a first metal terminal, and a second metal terminal. The case includes a recess and a case lower surface facing opposite to its opening. The ceramic element is disposed in the recess and includes first and second main surfaces opposing to each other, a first electrode portion formed on the first main surface, and a second electrode portion formed on the second main surface. The first metal terminal includes a first mounting portion disposed on the case lower surface and being substantially parallel to the first and second main surfaces and a first electrode connection portion connected to the first electrode portion. The second metal terminal includes a second mounting portion disposed on the case lower surface and being substantially parallel to the first and second main surfaces and a second electrode connection portion connected to the second electrode portion.

First claim

What is claimed is:

1. An electronic device comprising:
a case including a recess and a case lower surface facing opposite to an opening of the recess;
a ceramic element disposed in the recess and including:
a first main surface and a second main surface opposing to each other;
a first electrode portion formed on the first main surface; and
a second electrode portion formed on the second main surface;

a first metal terminal including:
a first mounting portion disposed on the case lower surface or next to the case lower surface and being substantially parallel to the first main surface and the second main surface; and
a first electrode connection portion connected to the first electrode portion; and

a second metal terminal including:
a second mounting portion disposed on the case lower surface or next to the case lower surface and being substantially parallel to the first main surface and the second main surface; and
a second electrode connection portion connected to the second electrode portion, wherein

the first metal terminal includes a first terminal arm portion connecting the first mounting portion and the first electrode connection portion,
the second metal terminal includes a second terminal arm portion connecting the second mounting portion and the second electrode connection portion,
the first metal terminal extends along the first main surface from the first terminal arm portion to a case side surface on a same plane,
the second metal terminal extends along an inner side surface of the case and a bottom surface of the recess from the second terminal arm portion, and
a part of the second metal terminal extending to the bottom surface of the recess is interposed by the bottom surface in contact with one part of the second metal terminal and the second main surface in contact with another part of the second metal terminal.

2. The electronic device according to claim 1 , further comprising a case cover for covering the opening, wherein
the first metal terminal passes through a first space formed between the case and the case cover, and
the second metal terminal passes through a second space formed between the case and the case cover and being away from the first space.

3. The electronic device according to claim 2 , wherein the case cover is disposed corresponding to a corner of the opening and includes a plurality of protrusion portions for being inserted into the recess.

4. The electronic device according to claim 1 , wherein a recess depth from the opening of the case to a bottom surface of the recess is larger than an element thickness as a distance between the first main surface and the second main surface.

5. The electronic device according to claim 1 , wherein
the ceramic element includes:
a first section having the first main surface, the first electrode portion, and a first dielectric portion; and
a second section having the second main surface, the second electrode portion, and a second dielectric portion, and

the first section and the second section are connected via an intermediate electrode portion.

6. The electronic device according to claim 1 , wherein
the first mounting portion of the first metal terminal and the second mounting portion of the second metal terminal are arranged on the case lower surface, and
the case lower surface includes a recess groove facing at least one of the first mounting portion and the second mounting portion and having a changing groove depth.

7. The electronic device according to claim 6 , wherein the recess groove unit includes:
a first recess groove where a space formed with a tip of the first mounting portion is larger than a space formed with a base end of the first mounting portion; and
a second recess groove where a space formed with a tip of the second mounting portion is larger than a space formed with a base end of the second mounting portion.

8. An electronic device comprising:
a case including a recess and a case lower surface facing opposite to an opening of the recess;
a ceramic element disposed in the recess and including:
a first main surface and a second main surface opposing to each other;
a first electrode portion formed on the first main surface; and
a second electrode portion formed on the second main surface;

a first metal terminal including:
a first mounting portion disposed on the case lower surface or next to the case lower surface and being substantially parallel to the first main surface and the second main surface; and
a first electrode connection portion connected to the first electrode portion; and

a second metal terminal including:
a second mounting portion disposed on the case lower surface or next to the case lower surface and being substantially parallel to the first main surface and the second main surface; and
a second electrode connection portion connected to the second electrode portion, wherein

the first metal terminal includes a first terminal arm portion connecting the first mounting portion and the first electrode connection portion,
the first metal terminal extends along the first main surface from the first terminal arm portion to a case side surface on a same plane,
a case cover for covering the opening includes a plurality of protrusion portions corresponding to a corner of the opening, and
the plurality of the protrusion portions is inserted into the recess.

9. An electronic device comprising:
a case including a recess and a case lower surface facing opposite to an opening of the recess;
a ceramic element disposed in the recess and including:
a first main surface and a second main surface opposing to each other;
a first electrode portion formed on the first main surface; and
a second electrode portion formed on the second main surface;

a first metal terminal including:
a first mounting portion disposed on the case lower surface or next to the case lower surface and being substantially parallel to the first main surface and the second main surface; and
a first electrode connection portion connected to the first electrode portion; and

a second metal terminal including:
a second mounting portion disposed on the case lower surface or next to the case lower surface and being substantially parallel to the first main surface and the second main surface; and
a second electrode connection portion connected to the second electrode portion, wherein

the ceramic element includes a first element portion and a second element portion each having the first main surface and the second main surface,
the first element portion and the second element portion are arranged so that their second main surfaces face each other,
the second electrode connection portion is interposed between the second main surfaces of the first element portion and the second element portion so as to be in contact with both of the second electrode portions of the first element portion and the second element portion,
the first electrode connection portion includes:
a first element connection portion connected to the first electrode portion of the first element portion; and
a second element connection portion connected to the first electrode portion of the second element portion, and
a part of the first metal terminal extending from the second element connection portion at a bottom surface of the recess is interposed by the bottom surface of the recess in contact with one part of the first metal terminal and the first main surface in contact with another part of the first metal terminal.

10. An electronic device comprising:
a case including a recess and a case lower surface facing opposite to an opening of the recess;
a ceramic element disposed in the recess and includin

Assignees

• Tdk Corp

Inventors

• Masuda Akihiro
• Ito Shinya
• Ando Norihisa
• Kaneko Hideki
• Aburakawa Ken
• Tamaki Kenya
• Yoshii Akitoshi

Classifications

• H01G2/106

  Fixing the capacitor in a housing · CPC title

• H01G4/12

  Ceramic dielectrics {(H01G4/085 takes precedence)} · CPC title

• H01G2/065 Primary

  for surface mounting, e.g. chip capacitors · CPC title

• H01G4/01

  Form of self-supporting electrodes · CPC title

• H01G4/228

  Terminals · CPC title