Electronic-component mounting structure

Patent metadata

Field	Value
Publication number	US-9184362-B2
Application number	US-201313966317-A
Country	US
Kind code	B2
Filing date	Aug 14, 2013
Priority date	Feb 24, 2011
Publication date	Nov 10, 2015
Grant date	Nov 10, 2015

Abstract

An electronic-component mounting structure includes an electronic component which includes a metal substrate, a semiconductor ceramic layer located on the metal substrate, a pair of split electrodes located on the semiconductor ceramic layer, and plating films located on the split electrodes and the metal substrate, and a mounting body on which lands to be connected to the respective split electrodes of the electronic component are provided. The position of a peripheral end portion of each land to be connected to the corresponding split electrode is located farther inside than the position of a peripheral end portion of the split electrode. In addition, a plane area of the land is smaller than that of the split electrode.

First claim

What is claimed is:

1. An electronic-component mounting structure comprising:
an electronic component which includes a metal substrate, a semiconductor ceramic layer located on the metal substrate, a pair of split electrodes located on the semiconductor ceramic layer, and plating films located on the split electrodes and the metal substrate; and
a mounting body on which lands to be connected to the respective split electrodes of the electronic component are located; wherein
a position of a peripheral end portion of each land to be connected to the corresponding split electrode is located farther inside than a position of a peripheral end portion of the split electrode;
a thickness of the metal substrate of the electronic component is about 10 μm to about 80 μm, and a thickness of the ceramic layer is about 1 μm to about 10 μm;
the position of the peripheral end portion of the split electrode is located farther inside than a position of a peripheral end portion of the semiconductor ceramic layer; and
the position of the peripheral end portion of the split electrode is located farther inside than a position of a peripheral end portion of the metal substrate.

2. The electronic-component mounting structure according to claim 1 , wherein a plane area of each land is smaller than that of the corresponding split electrode.

3. The electronic-component mounting structure according to claim 1 , wherein the metal substrate of the electronic component has a sheet shape and is made from a metal powder paste, and the ceramic layer has a sheet shape and is made from a ceramic slurry.

4. The electronic-component mounting structure according to claim 3 , wherein the sheet-shaped metal substrate and the sheet-shaped ceramic layer are defined by a fired integral laminate.

5. The electronic-component mounting structure according to claim 1 , further comprising a protective layer including an insulating material and located on at least a surface of the ceramic layer on which the split electrodes are located.

6. The electronic-component mounting structure according to claim 1 , wherein an electrolytic plating film is located on a surface of the metal substrate.

7. The electronic-component mounting structure according to claim 1 , wherein the electronic component is a thermistor.

8. The electronic-component mounting structure according to claim 1 , wherein a total thickness of the thermistor is about 10 μm to about 100 μm.

9. The electronic-component mounting structure according to claim 1 , wherein the plating films include a Ni plating film and a Sn plating film.

10. The electronic-component mounting structure according to claim 1 , wherein the semiconductor ceramic layer includes an NTC characteristic.

11. The electronic-component mounting structure according to claim 1 , wherein the semiconductor ceramic layer includes at least one of Mn, Ni, Fe, Ti, Co, Al, and Zn.

12. The electronic-component mounting structure according to claim 1 , wherein the metal substrate and the split electrodes are made of at least one of a single noble metal, a single base metal, and an alloy of at least one of the single noble metal and the single base metal.

13. The electronic-component mounting structure according to claim 1 , wherein the metal substrate and the split electrodes are made of at least one of Ag, Pd, Pt, Au, Cu, Ni, Al, W and Ti, and an alloy of at least one of Ag, Pd, Pt, Au, Cu, Ni, Al, W and Ti.

14. The electronic-component mounting structure according to claim 1 , wherein the position of the peripheral end portion of each land to be connected to the corresponding split electrode is located farther inside than a position of a peripheral end portion of the plating film located on the corresponding split electrode.

Assignees

• Murata Manufacturing Co

Inventors

• Miura Tadamasa

Classifications

• H01C1/14

  Terminals or tapping points specially adapted for resistors; Arrangements of terminals or tapping points on resistors · CPC title

• H01C7/008

  Thermistors (H01C7/02 - H01C7/06 take precedence) · CPC title

• H01C1/014 Primary

  the resistor being suspended between and being supported by two supporting sections (H01C1/016 takes precedence) · CPC title

• H01C1/144

  the terminals or tapping points being welded or soldered · CPC title

• H01C1/1406

  Terminals or electrodes formed on resistive elements having positive temperature coefficient · CPC title