JP2003124007A5

JP2003124007A5 -

Info

Publication number: JP2003124007A5
Application number: JP2002300833A
Authority: JP
Filing date: 2002-10-15
Publication date: 2005-05-26

Description

【００１３】
【課題を解決するための手段】請求項１に記載の発明は、ＮＴＣサーミスタ材料よりなるサーミスタ素体と、前記サーミスタ素体内においてサーミスタ層を介して隔てられて積層された複数の内部電極と、前記サーミスタ素体の外表面に形成された第１，第２の外部電極とを備えるＮＴＣサーミスタ素子において、少なくとも１つの内部電極が、ギャップを隔てられて同一平面上で対向され、それぞれの一端が前記第１，第２の外部電極の各一方に接続された第１，第２の対向電極を有し、前記第１の対向電極の少なくとも一部が、サーミスタ層を介して隔てられた異なる高さ位置の反対電位に接続される第１の対向電極もしくは内部電極と厚み方向に重なるように位置されており、前記第１，２の外部電極はサーミスタ素体の上面、下面および側面に至る被り部を有し、前記第１または第２の外部電極の被り部と、第２または第１の外部電極に接続された内部電極との距離が、第１，第２の対向電極間の前記ギャップの大きさよりも大きく、前記第１または第２の外部電極の被り部の長さが、第１または第２の外部電極に接続された第２の対向電極の長さより長くされていることを特徴とする、ＮＴＣサーミスタ素子である。
請求項２に記載の発明は、ＮＴＣサーミスタ材料よりなるサーミスタ素体と、前記サーミスタ素体内においてサーミスタ層を介して隔てられて積層された複数の内部電極と、前記サーミスタ素体の外表面に形成された第１，第２の外部電極とを備えるＮＴＣサーミスタ素子において、少なくとも１つの内部電極が、ギャップを隔てられて同一平面上で対向され、それぞれの一端が前記第１，第２の外部電極の各一方に接続された第１，第２の対向電極を有し、前記第１の対向電極の少なくとも一部が、サーミスタ層を介して隔てられた異なる高さ位置の反対電位に接続される第１の対向電極もしくは内部電極と厚み方向に重なるように位置されており、前記第１，２の外部電極はサーミスタ素体の上面、下面および側面に至る被り部を有し、前記第１または第２の外部電極の被り部と、第２または第１の外部電極に接続された内部電極との距離が、第１，第２の対向電極間の前記ギャップの大きさよりも大きく、厚み方向に対向する前記内部電極間の距離が、第１，第２の対向電極間の前記ギャップの大きさより小さくされていることを特徴とする、ＮＴＣサーミスタ素子である。 0013
The invention according to claim 1 comprises a thermista element made of an NTC thermista material, a plurality of internal electrodes separated and laminated in the thermista element body via a thermista layer, and a plurality of internal electrodes. In the NTC thermista element including the first and second external electrodes formed on the outer surface of the thermista element, at least one internal electrode is opposed to each other on the same plane with a gap, and one end of each is opposed to each other. It has a first and second counter electrode connected to each one of the first and second external electrodes, and at least a part of the first counter electrode is separated by a thermista layer and has different heights. It is positioned so as to overlap the first counter electrode or the internal electrode connected to the opposite potential of the position in the thickness direction, and the first and second external electrodes cover the upper surface, the lower surface and the side surface of the thermista element body. The distance between the covered portion of the first or second external electrode and the internal electrode connected to the second or first external electrode is the gap between the first and second counter electrodes. The feature is that the length of the covering portion of the first or second external electrode is longer than the length of the second counter electrode connected to the first or second external electrode. It is an NTC thermista element.
The invention according to claim 2 is formed on a thermista element made of an NTC thermista material, a plurality of internal electrodes laminated in the thermista element body separated by a thermista layer, and an outer surface of the thermista element. In the NTC thermista element including the first and second external electrodes, at least one internal electrode is opposed to each other on the same plane with a gap, and one end of each is opposed to the first and second external electrodes. It has a first and second counter electrode connected to each one of the above, and at least a part of the first counter electrode is connected to opposite potentials at different height positions separated by a thermista layer. The first and second external electrodes are positioned so as to overlap the first counter electrode or the internal electrode in the thickness direction, and the first and second external electrodes have covering portions extending to the upper surface, the lower surface and the side surface of the thermista element body, and the first or the first or the outer electrodes. The distance between the covering portion of the second external electrode and the internal electrode connected to the second or first external electrode is larger than the size of the gap between the first and second counter electrodes, and is in the thickness direction. The NTC thermista element is characterized in that the distance between the facing internal electrodes is smaller than the size of the gap between the first and second facing electrodes.

請求項１または２に記載の発明に係るＮＴＣサーミスタ素子では、好ましくは、請求項３に記載のように、第１，第２の対向電極からなる内部電極が、複数層の内部電極のうち最上層と最下層の一方または両方に配置されている。 In the NTC thermistor element according to the invention according to claim 1 or 2 , preferably, as described in claim 3 , the internal electrode composed of the first and second counter electrodes is the most of the internal electrodes having a plurality of layers. It is located in one or both of the upper layer and the bottom layer.

請求項１〜３の何れかに記載の発明に係るＮＴＣサーミスタ素子では、好ましくは、請求項４に記載のように、全ての内部電極がギャップを隔てられて同一平面上で対向された第１，第２の対向電極を有し、各第１の対向電極の少なくとも一部がサーミスタ層を隔てられて異なる高さ位置の反対電位に接続される第１の対向電極と厚み方向に重なり合うように位置されている。 In the NTC thermistor element according to the invention according to any one of claims 1 to 3 , preferably, as described in claim 4 , all the internal electrodes are opposed to each other on the same plane with a gap. , With a second counter electrode so that at least a portion of each first counter electrode overlaps in the thickness direction with a first counter electrode that is separated by a thermistor layer and connected to opposite potentials at different height positions. It is located.

請求項５に記載の発明は、請求項１〜４の何れかに記載の発明におけるＮＴＣサーミスタ素子において、前記第１または第２の外部電極の被り部が、第２または第１の外部電極に接続された前記第１の対向電極と厚み方向において重ならないように配置されていることを特徴とする。 In the invention according to claim 5 , in the NTC thermistor element according to any one of claims 1 to 4 , the covered portion of the first or second external electrode is attached to the second or first external electrode. It is characterized in that it is arranged so as not to overlap with the connected first counter electrode in the thickness direction.

Claims

A thermistor body made of an NTC thermistor material,
A plurality of internal electrodes separated and stacked via a thermistor layer in the thermistor body;
An NTC thermistor element comprising: first and second external electrodes formed on an outer surface of the thermistor body;
At least one internal electrode is separated by a gap and is opposed on the same plane, and has first and second opposing electrodes whose one end is connected to one of the first and second external electrodes. ,
At least a portion of the first opposing electrode are positioned so as to overlap the first opposing electrode or internal electrode in the thickness direction to be connected to the opposite potential of the different height positions spaced through the thermistor layer ,
The first and second external electrodes have covering portions extending to the upper surface, the lower surface, and the side surface of the thermistor body,
The distance between the cover of the first or second external electrode and the internal electrode connected to the second or first external electrode is larger than the size of the gap between the first and second opposing electrodes. ,
The length of the cover of the first or second external electrode is longer than the length of the second counter electrode connected to the first or second external electrode.
An NTC thermistor element characterized by

A thermistor body made of an NTC thermistor material,
A plurality of internal electrodes separated and stacked via a thermistor layer in the thermistor body;
An NTC thermistor element comprising: first and second external electrodes formed on an outer surface of the thermistor body;
At least one internal electrode is separated by a gap and is opposed on the same plane, and has first and second opposing electrodes whose one end is connected to one of the first and second external electrodes. ,
At least a portion of the first opposing electrode are positioned so as to overlap the first opposing electrode or internal electrode in the thickness direction to be connected to the opposite potential of the different height positions spaced through the thermistor layer ,
The first and second external electrodes have covering portions extending to the upper surface, the lower surface, and the side surface of the thermistor body,
The distance between the cover of the first or second external electrode and the internal electrode connected to the second or first external electrode is larger than the size of the gap between the first and second opposing electrodes. ,
The distance between the internal electrodes opposed in the thickness direction is smaller than the size of the gap between the first and second opposing electrodes.
An NTC thermistor element characterized by

The NTC thermistor element according to claim 1 or 2 , wherein the internal electrode consisting of the first and second counter electrodes is disposed on one or both of the uppermost layer and the lowermost layer of the plurality of internal electrodes.

All internal electrodes have a gap and have coplanar opposed first and second counter electrodes, and at least a portion of each first counter electrode has a thermistor layer at different height positions The NTC thermistor element according to any one of claims 1 to 3, wherein the NTC thermistor element is positioned so as to overlap in the thickness direction with a first counter electrode connected to the opposite potential of the.

Overburden portion of the first or second external electrodes are arranged so as not to overlap in the second or first of said first counter electrode and a thickness direction that is connected to the external electrodes, according to claim 1 to 4 The NTC thermistor element according to any one of the above.

The NTC thermistor element according to any one of claims 1 to 5, wherein the width of the first counter electrode is made different from the width of the other internal electrodes arranged to overlap in the thickness direction via the thermistor element.