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A method for surface metallization of ceramic filter

A ceramic filter and surface metal technology, which is applied to waveguide devices, circuits, electrical components, etc., can solve problems such as crystal transformation and affecting the performance of ceramic substrates, and achieve improved adhesion, high production efficiency, and simple process Effect

Active Publication Date: 2022-04-01
江苏宝利金材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method requires special equipment, and the ceramic substrate needs to be placed in a high-temperature environment of 1200-2500 ° C, which is prone to crystal transformation, which will affect the performance of the ceramic substrate

Method used

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  • A method for surface metallization of ceramic filter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for metallizing the surface of a ceramic filter, such as figure 1 shown, including the following steps:

[0031] (1) Pretreatment: Clean the surface of the ceramic filter by physical methods to remove the oil on the surface of the filter to ensure the adhesion of the metal layer on the ceramic surface. As for the physical cleaning method, one or more combinations of ultrasonic cleaning, plasma cleaning, high-pressure water jet cleaning or electric pulse cleaning can be selected.

[0032] (2) Coating of the intermediate layer on the surface of the ceramic filter: immerse the cleaned ceramic filter in a solution containing a silicon compound, and fully soak it so that the surface of the filter is coated with an intermediate coating film; the solution containing a silicon compound It is an aqueous solution of silane coupling agent, and the mass concentration of silane coupling agent in the solution is 5-10%. The silane coupling agent can also be replaced by silic...

Embodiment 2

[0037] On the basis of Example 1, process parameters can be modified

[0038] A method for metallizing the surface of a ceramic filter, such as figure 1 shown, including the following steps:

[0039] (1) Pretreatment: Clean the surface of the ceramic filter by chemical methods to remove the oil on the surface of the filter to ensure the adhesion of the metal layer on the ceramic surface. The chemical cleaning adopts pickling.

[0040] (2) Coating of the intermediate layer on the surface of the ceramic filter: immerse the cleaned ceramic filter in a solution containing a titanium compound, and fully soak it so that the surface of the filter is coated with an intermediate coating film; the solution containing a titanium compound It is an ethanol solution of titanate, and the mass concentration of titanate is 10-30%. The titanate can also be replaced by titanate, titanate and titanium-containing coupling agent, which should ensure that the compound is uniformly dispersed. This...

Embodiment 3

[0045] On the basis of Example 1, process parameters can be modified

[0046]A method for metallizing the surface of a ceramic filter, such as figure 1 shown, including the following steps:

[0047] (1) Pretreatment: Clean the surface of the ceramic filter by chemical methods to remove the oil on the surface of the filter to ensure the adhesion of the metal layer on the ceramic surface. The chemical cleaning adopts alkaline cleaning.

[0048] (2) Intermediate layer coating on the surface of the ceramic filter: immerse the cleaned ceramic filter into a solution containing silicon / titanium compounds, and fully soak so that the surface of the filter is coated with a layer of intermediate coating film;

[0049] The silicon / titanium-containing compound is a mixed solution of silicate and titanium-containing coupling agent, and a dispersion of methanol solution, wherein the mass concentration of silicate is 5-10%, and the mass concentration of titanium-containing coupling agent is...

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Abstract

The invention relates to a method for metallizing the surface of a ceramic filter, which mainly includes the following steps: cleaning the surface of the ceramic filter to remove oil stains on the surface of the filter, and then immersing the cleaned ceramic filter into a silicon / titanium compound solution, fully soaked to make the surface of the filter coated with an intermediate coating film; further electroless copper plating or electroless silver plating, and then electroplating to form a metal layer with good performance on the surface of the ceramic filter; finally, after The electroplated ceramic filter is placed in an inert atmosphere, so that the intermediate coating layer reacts to form silicon dioxide, and at the same time, it is closely combined with the metal on the surface layer and the base ceramic. Compared with existing products, the solution of the invention has the characteristics of simple process and high production efficiency, and the obtained product has good performance.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a method for metallizing the surface of a ceramic filter. Background technique [0002] With the popularization of 4G network, the construction of 5G network and the rapid development of big data, the spectrum used by communication equipment under the new standard is gradually developing to high frequency. In the high-frequency state, the wave penetration is poor, the attenuation is large, and the coverage ability is greatly weakened, which leads to a large number of small base stations becoming a new trend in the 5G era. Ceramic dielectric filters have the characteristics of high dielectric constant, high Q value, low loss, small size, light weight, low cost, and good resistance to temperature drift. Compared with small metal cavity filters, the performance of ceramic dielectric filters is lower, which is determined by the nature of the material. At present, many filter man...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P11/00H01P1/20
CPCH01P11/007H01P1/2002
Inventor 王勇刘芬王一超
Owner 江苏宝利金材科技有限公司
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