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A thick film resistor paste

A technology of thick film resistors and pastes, which is applied in the direction of conductive materials dispersed in non-conductive inorganic materials, etc., can solve the problems of large electrostatic discharge changes, wide TCR range, poor resistance value accuracy, etc., to improve wettability, good Effects of sintering stability, improved resistance accuracy and reliability

Active Publication Date: 2022-07-08
西安宏星电子浆料科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The resistance paste prepared by the traditional process has poor resistance accuracy, wide TCR range, large electrostatic discharge changes, and poor reliability under high temperature, high humidity, high cold, vibration and long-term power load working conditions

Method used

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Embodiment Construction

[0014] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, which do not limit the protection scope of the present invention. The protection scope of the present invention is only limited by the claims, and any omissions, substitutions or modifications made by those skilled in the art on the basis of the disclosed embodiments of the present invention will fall into the protection scope of the present invention.

[0015] 1. Preparation of conductive phase

[0016] Conductive phase 1: Set the specific surface area to 5 to 65 m 2 / g ruthenium dioxide and lead ruthenate having a particle size range of 0.7-1.3 μm are mixed at a mass ratio of 1:4 to prepare conductive phase 1 .

[0017] Conductive phase 2: dissolve boric acid in methanol to form a boric acid solution with a mass concentration of 2%, then stir and disperse conductive phase 1 in the boric acid solution, and the mass ratio of conductive phase 1 t...

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Abstract

The invention discloses a thick-film resistor paste. The resistor paste is composed of a conductive phase, a glass binding phase, an inorganic additive and an organic carrier; the conductive phase is prepared by dispersing conductive powder in a methanol solution of boric acid, The surface is coated with boric acid, and the obtained conductive powder is uniformly coated with boric acid. The invention adopts ruthenium dioxide with extremely low resistivity and lead ruthenate with high resistivity as conductive powder to ensure that the resistance paste has good resistance value stability, excellent withstand voltage, power resistance and reliable working life at different resistance values. In the present invention, the conductive powder is coated with boric acid on the surface, so that a layer of boric acid is formed on the surface. During the use of the resistive paste, due to the decomposition of the boric acid, the problem of the resistance to the paste is solved. The agglomeration of the conductive phase improves the wettability between the conductive phase and the organic carrier, the conductive phase in the prepared resistance paste can be dispersed more uniformly, and the resistance precision and reliability of the paste are improved.

Description

technical field [0001] The invention belongs to the technical field of electronic paste, and particularly relates to a resistor paste for thick-film circuits. Background technique [0002] High-performance thick-film circuits are mainly used in aviation, aerospace and high-power, high-precision, high-end cutting-edge technology products that require high reliability of thick-film circuits. At present, the global demand for high-performance thick-film circuit products is increasing. Therefore, the requirements for electronic pastes, especially resistive paste products, required for the preparation of high-performance thick-film circuits are higher. [0003] High-performance thick-film circuit products will be subjected to conditions such as high temperature, high humidity, high cold, vibration, and high power in application. Therefore, resistive paste products must have the characteristics of high resistance value accuracy, good stability, and extremely high power resistance....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/14H01B1/20
CPCH01B1/14H01B1/20
Inventor 不公告发明人
Owner 西安宏星电子浆料科技股份有限公司
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