Rheostat with filtration structure

A filter structure and varistor technology, which is applied in the direction of resistor electrostatic/electromagnetic shielding devices, etc., can solve the problems of high production cost, co-firing between the main body of the varistor and the resistance layer, etc., and achieve the effect of reducing the volume and cheap manufacturing cost

Inactive Publication Date: 2014-08-06
SFI ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The varistors 10 and 20 disclosed in the above prior art both have dual functions of protecting against electrostatic discharge (ESD) and protecting against electromagnetic interference (EMI). The interior of the main body of the rheostat, so the production cost is relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-9

[0079] According to the specific components and ratios in Table 1, the resistance pastes used in Examples 1-9 are prepared respectively for subsequent use, wherein the glass powder is selected from silicon dioxide (SiO 2 ) is the silicate glass of main component; The conductor particle of embodiment 1 selects the ruthenium dioxide (RuO 2 ) and 1wt% silver-palladium (Ag / Pd) alloy; the conductor particles of embodiment 2-8 are selected from 98wt% ruthenium dioxide (RuO 2 ) and 2wt% silver-palladium (Ag / Pd) alloy; the conductor particle of embodiment 9 is selected from 97wt% ruthenium dioxide (RuO 2 ) and 3wt% silver-palladium (Ag / Pd) alloy composition.

[0080] Deploy the zinc oxide slurry with the same composition used in Examples 1-9, and use the resistance paste of Examples 1-9 in the co-firing process to make the varistors 30 with filter structures of Examples 1-9 respectively, and their structures are as follows Figure 4 and Figure 5 shown.

[0081] The varistor 30 wi...

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Abstract

The invention discloses a rheostat with a filtration structure; by using resistive paste with a specific formula, a zinc oxide varistor and a resistance layer are co-fired in a sintering process; the resistance layer is sintered in a rheostat main body, so that the rheostat is low in manufacturing cost; the components of the resistive paste consist of 60wt%-70wt% of glass powder and 30wt%-40wt% of conductive particle; the conductive particle consists of 97wt%-99wt% of ruthenium dioxide (RuO2) and 1wt%-3wt% of silver palladium (Ag / Pd) alloy.

Description

technical field [0001] The invention relates to a varistor, in particular to a varistor with dual functions of protecting electrostatic discharge (ESD) and protecting electromagnetic wave interference (EMI). Background technique [0002] Surge absorbers (or varistors) are overvoltage or surge protection components for electronic components, electronic circuits or electronic equipment. With the advancement of science and technology, the operating frequency of electronic products is getting higher and higher, the size is getting smaller and smaller, and the interference of electromagnetic noise is becoming more complicated. Therefore, it is a recent popular trend to endow varistors with dual functions (hereinafter generally referred to as varistors with filtering structure), which not only have the original protection function of electrostatic discharge, but also have filtering function to protect against electromagnetic interference. [0003] The varistor with filtering stru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01C1/06C03C14/00
Inventor 连清宏许鸿宗邱治盈
Owner SFI ELECTRONICS TECH
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