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A low-temperature co-fired device and a manufacturing method of a low-intermediate co-fired ceramic diaphragm

A technology of co-fired ceramics and production methods, which is applied in the manufacture of inductors/transformers/magnets, electrical components, circuits, etc., can solve problems such as differences in physical properties, affecting device reliability, and magnet structure defects, so as to improve compactness and enhance Reliable performance, low loss effect

Active Publication Date: 2019-09-13
SHENZHEN SUNLORD ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the difference in composition of different dielectric materials, there are great differences in their physical properties during the sintering process. During co-firing, due to the mismatch between materials, it is easy to cause structural defects in the sintered magnet, which affects the long-term device. reliability

Method used

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  • A low-temperature co-fired device and a manufacturing method of a low-intermediate co-fired ceramic diaphragm
  • A low-temperature co-fired device and a manufacturing method of a low-intermediate co-fired ceramic diaphragm

Examples

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Embodiment 1

[0050] A method for manufacturing a low-temperature co-fired common-mode inductor with a metric 0806 size package, comprising the following steps: casting low-intermediate co-fired ceramics and ferrite materials into a film, making conductive electrodes, and making the film with electrodes The sheets are stacked to form a green body, and the green body is cut, deglued, sintered, terminal electrodes and electroplated at one time to complete the production of the co-fired device.

[0051] Low-dielectric co-fired ceramics are materials with a relative dielectric constant less than 5.5, and their thermal expansion coefficient is close to that of ferrite materials and conductive electrode materials. The production steps of low-dielectric co-fired ceramic diaphragms are as follows:

[0052] 1) Choose a low dielectric ceramic material

[0053] The low-dielectric ceramic material is Guiyang Jinghua's DJ1024B glass material, which has a relative dielectric constant of 4.8 and a thermal...

Embodiment 2

[0073] A method for manufacturing a low-temperature co-firing common-mode inductor in a metric 1210 package is the same as the first embodiment. The difference is that the size of the ceramic body is increased by 2.7 times, the common mode insertion loss can reach -32dB&750MHz, the differential mode cut-off frequency can reach 3.2GHz&-3dB, the sintered magnet has no crack defects on the surface, and no internal defects (such as figure 1 ), meeting the requirements of reliability standards for the inductance industry.

[0074] Through the research and development of materials, the inventors mixed dielectric materials into ceramic materials that have no adverse effect on the electrical properties of materials, reducing the difference in physical properties between them and other co-fired materials, thereby improving the co-firing matching between different materials , greatly reduce or prevent co-fired magnet defects, and improve the reliability of the device.

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Abstract

The invention discloses making methods of a low-temperature co-fired device and a low-permittivity co-fired ceramic membrane. The making method of the low-permittivity co-fired ceramic membrane comprises the following steps of 1), preparing a low-permittivity ceramic material of which the relative permittivity is not more than 5.8; 2), mixing a low-permittivity medium with a high expansion coefficient in a predetermined range in the low-permittivity ceramic material; 3), carrying out pre-firing treatment on mixed powder, so as to obtain a low-permittivity co-fired ceramic material, wherein the difference among the thermal expansion coefficient of the low-permittivity co-fired ceramic material and the thermal expansion coefficients of a ferrite material and a conducting electrode material is in a predetermined range; 4), carrying out pulping and coating on the pre-fired mixed powder, so as to form the low-permittivity co-fired ceramic membrane. By using the methods, the co-firing matching performance among different materials can be promoted; the defects of a co-fired magnetic body are reduced or prevented dramatically; the reliability performance of the device is promoted.

Description

technical field [0001] The invention relates to the manufacture of electronic components, in particular to a method for manufacturing low-temperature co-fired devices and low-intermediate co-fired ceramic diaphragms. Background technique [0002] With the continuous development of artificial intelligence technology, the amount of data that the chip needs to process is increasing, and the circuit design requires the line to transmit data faster and faster. In this way, the requirements for components are moving towards high-end while maintaining the same electrical performance. development in the direction of frequency. For inductors and filter devices, it is difficult to meet the requirements of high frequency, high impedance and low loss at the same time with the traditional single material design. Therefore, it is necessary to introduce different dielectric materials in the structural design to meet the requirements of electrical performance. Due to the difference in com...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/622C03C10/00H01F41/00
Inventor 郑卫卫吴震陈柳城
Owner SHENZHEN SUNLORD ELECTRONICS