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Laminated sheet voltage-sensitive resistor

A varistor, laminated technology, applied in the direction of varistors, varistor cores, overvoltage protection resistors, etc., can solve the problem of failure to find laminated chip varistors, decreased energy tolerance, etc. question

Active Publication Date: 2009-09-16
TDK CORPARATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Recently, if the desired more miniaturized multilayer chip varistor is adopted, the above-mentioned energy withstand capacity will drop significantly, so the current situation is that it has not yet found a solution that is sufficient for both miniaturization and energy durability. Applicable multilayer chip varistors

Method used

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  • Laminated sheet voltage-sensitive resistor
  • Laminated sheet voltage-sensitive resistor
  • Laminated sheet voltage-sensitive resistor

Examples

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Embodiment

[0078] Hereinafter, the present invention will be described in more detail using examples, but the present invention is not limited to these examples.

[0079]

[0080] First, in ZnO (97.725mol%) with a purity of 99.9%, add Pr (0.5mol%), Co (1.5mol%), Al (0.005mol%), K (0.05mol%), Cr (0.1mol%) ), Ca (0.1mol%), and Si (0.02mol%), the varistor material was modulated.

[0081] In addition, different from this, according to the compounding amounts shown in Tables 1 to 3, prepared 2 o 3 At least two of the internal electrode pastes.

[0082] according to Figure 7 In the procedure shown, using the varistor material and the internal electrode paste, a varistor layer 2 composed of a varistor material, including Pd, Ag, and Al, was fabricated. 2 o 3 At least two of the internal electrodes 4a, 4b, the external electrode 6 made of Ag, the Ni plating layer 8, and the Sn plating layer 10 have figure 1 No.1 to 47 multilayer chip varistors in the shape shown. The dimensions of each...

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Abstract

PROBLEM TO BE SOLVED: To provide a laminated chip varistor which can assure a sufficient energy resistance even when the size of an element is reduced. ŽSOLUTION: The laminated chip varistor 1 includes a plurality of varistor layers 2, a varistor element 5 having internal electrodes 4a, 4b disposed to hold each varistor layer 2, and an external electrode provided at the end of the varistor element 5 and connected to the internal electrodes 4a, 4b. In this laminated chip varistor 1, the varistor layer 2 contains a ZnO as a main ingredient and a Pr as a sub-ingredient. The internal electrodes 4a, 4b contain Pd, Ag, and an Al oxide of 0.0001-1.0 mass pt. to total 100 mass pts. of the Pd and the Ag. Ž

Description

technical field [0001] The present invention relates to a multilayer chip varistor. Background technique [0002] A varistor is an element whose resistance value varies nonlinearly with voltage. For example, it has such a characteristic that if a voltage exceeding a specified voltage value (varistor voltage) is applied, the resistance of the element greatly decreases. decreases, and the current, which had barely flowed before, begins to flow sharply. Varistors with such characteristics are installed in electronic devices, and are often used as elements for protecting circuits from abnormal voltages caused by static electricity or lightning strikes. [0003] A varistor for circuit protection is, for example, incorporated in parallel in a power supply circuit of an electronic device, and normally functions as an insulating element during operation. Moreover, when an abnormal voltage called a surge or noise enters the electronic device, the resistance value of the varistor su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01C7/10
CPCH01C7/10H01C7/112H01C7/12
Inventor 竹花末起一小笠原正曾根英明阿部毅彦北村英隆
Owner TDK CORPARATION
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