Composite dielectric ceramic, preparation method thereof and microwave filter

A technology of microwave filters and dielectric ceramics, which is applied in vacuum evaporation plating, coating, sputtering plating, etc., can solve the problems of unstable performance, low bonding force, and poor bonding force of microwave filters, and achieve the goal of manufacturing The method conditions are controllable, the cost is low, and the effect of stress is small

Active Publication Date: 2022-01-07
MOBILE ANTENNA TECH SHENZHEN +5
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of this application is to overcome the above-mentioned shortcomings of the prior art, and provide a composite dielectric ceramic and its preparation method to solve the problem of low bonding force and high cost between the metal layer and the dielectric ceramic caused by the existing metallization process on the surface of the dielectric ceramic. technical problem
[0008] Another object of the present application is to provide a microwave filter to solve the technical problem of the unstable performance of the microwave filter caused by the poor bonding force between the metal layer contained in the existing microwave filter and the dielectric ceramic

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  • Composite dielectric ceramic, preparation method thereof and microwave filter
  • Composite dielectric ceramic, preparation method thereof and microwave filter

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preparation example Construction

[0043] Correspondingly, the embodiment of the present application also provides the preparation method of the composite dielectric ceramic in the above embodiment of the application. The preparation method technological process of this composite dielectric ceramic is as follows figure 1 shown, including the following steps:

[0044] Step S01: providing a dielectric ceramic body;

[0045] Step S02: forming an Ag layer on the surface of the dielectric ceramic body, the density of the Ag layer increases in a gradient from the dielectric ceramic body to the outer surface of the Ag layer.

[0046] Wherein, the dielectric ceramic body in step S01 is the dielectric ceramic body mentioned above. In an embodiment, the dielectric ceramic body is a microwave dielectric ceramic body of a microwave filter. Its shape can be according to the shape commonly used in microwave filters or the improved shape.

[0047] Before the Ag layer is formed on the surface of the dielectric ceramic body...

Embodiment 1

[0062] This embodiment provides a microwave filter and a preparation method thereof. The microwave filter includes a microwave dielectric ceramic body and an Ag layer deposited on the surface of the microwave dielectric ceramic body.

[0063] The preparation method of microwave filter comprises the steps:

[0064] S1: Provide dielectric ceramic body:

[0065] S11: Carry out vibration grinding and ultrasonic cleaning on the dielectric ceramics, the vibration grinding particles are alumina balls with a diameter of 4 mm; the ultrasonic cleaning solvents are acetone and absolute ethanol, and the cleaning time is 30 minutes;

[0066] S12: Dry the dielectric ceramic after ultrasonic cleaning, the drying temperature is 120°C, and the drying time is 40 minutes;

[0067] S2: Put the dielectric ceramic into the magnetron sputtering chamber, and when it reaches 5×10 -4 After Pa background vacuum degree, argon gas is introduced and substrate heating is turned on, and argon plasma is ge...

Embodiment 2

[0069] This embodiment provides a microwave filter and a preparation method thereof. The microwave filter includes a microwave dielectric ceramic body and an Ag layer deposited on the surface of the microwave dielectric ceramic body.

[0070] The preparation method of microwave filter comprises the steps:

[0071] S1: Provide dielectric ceramic body:

[0072]S11: Carry out vibration grinding and ultrasonic cleaning on the dielectric ceramics, the vibration grinding particles are alumina balls with a diameter of 4 mm; the ultrasonic cleaning solvents are acetone and absolute ethanol, and the cleaning time is 30 minutes;

[0073] S12: Dry the dielectric ceramic after ultrasonic cleaning, the drying temperature is 150°C, and the drying time is 40 minutes;

[0074] S2: Put the dielectric ceramic into the magnetron sputtering cavity, and when it reaches 6×10 -4 After the Pa background vacuum degree, argon gas is introduced and the substrate is heated, and argon plasma is generat...

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Abstract

The invention discloses composite dielectric ceramic, a preparation method thereof and a microwave filter. The composite dielectric ceramic comprises a dielectric ceramic body, an Ag layer is combined on the surface of the dielectric ceramic body, and the density of the Ag layer is increased in a gradient mode in the direction from the dielectric ceramic body to the outer surface of the Ag layer. The microwave filter disclosed by the invention is the composite dielectric ceramic disclosed by the invention. According to the composite dielectric ceramic and the microwave filter, the stress between the Ag layer and the dielectric ceramic body is small, the bonding strength is high, and the composite dielectric ceramic and the microwave filter have the characteristic of low loss and are low in cost. According to the preparation method of the composite dielectric ceramic, the structure, low loss, electromagnetic performance and other performance stability of the prepared composite dielectric ceramic can be effectively ensured.

Description

technical field [0001] The application belongs to the technical field of electronic materials, and in particular relates to a composite dielectric ceramic, a preparation method thereof, and a microwave filter. Background technique [0002] With the rapid development of 5G technology, the requirements for miniaturization, light weight and multi-function of electronic devices are getting higher and higher. In the fields of the Internet of Things, satellite communications, wearable devices, and electronic medical equipment, higher requirements are placed on the performance and reliability of microwave devices. Microwave filter is the key device for signal processing when transmitting and receiving signals in communication base stations. The improvement of its performance determines the improvement of communication quality and the development direction of communication technology. [0003] At present, with the improvement of communication frequency, the miniaturization of filte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/88C23C14/35C23C14/18
CPCC04B41/88C04B41/5116C23C14/35C23C14/185C23C14/3492C04B41/4529
Inventor 冒旭
Owner MOBILE ANTENNA TECH SHENZHEN
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