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A high-frequency withstand voltage film capacitor

A thin-film capacitor and withstand voltage technology, applied in thin-film/thick-film capacitors, multilayer capacitors, fixed capacitor components, etc., to achieve high repeatability, solve high-temperature sintering problems, and optimize film performance

Active Publication Date: 2020-02-14
汕头市信音电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although these dielectric materials have a low sintering temperature, they still cannot meet some high-demand applications, and it is necessary to develop dielectric materials with lower sintering temperatures

Method used

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Experimental program
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Effect test

Embodiment 1

[0013] The preparation process of thin film capacitors is as follows: First, the SiO 2 The substrate is ultrasonically cleaned; then, the TiO 2 With TeO 2 The powder is mixed and heated at a temperature of 550℃ to obtain TiTe 3 O 8 ; According to the mass ratio of 1:0.1, TiTe 3 O 8 With MnO 2 Mix and perform 24 h ball milling; add 5% mass fraction of PVA particles, press the mixture into a shape under a pressure of 18 MPa, put it in a heating furnace, and sinter at 600 ℃; after natural cooling, place it in vacuum drying Box drying; using vacuum evaporation method, in SiO 2 On the substrate, prepare Cu / Ni bottom electrode; by radio frequency sputtering, deposit Cu / Ni SiO 2 On the base, TiTe is deposited 3 O 8 -MnO 2 The dielectric film has a sputtering power of 200 W; it is annealed at 400 ℃ to promote the growth of the film; finally, the Cu layer is deposited by vacuum evaporation as the upper electrode to obtain the MIM film capacitor.

Embodiment 2

[0015] The preparation process of thin film capacitors is as follows: First, the SiO 2 The substrate is ultrasonically cleaned; then, the TiO 2 With TeO 2 The powder is mixed and heated at a temperature of 550℃ to obtain TiTe 3 O 8 ; According to the mass ratio of 1:0.2, TiTe 3 O 8 With MnO 2 Mix and perform 24 h ball milling; add 5% mass fraction of PVA particles, press the mixture into a shape under a pressure of 18 MPa, put it in a heating furnace, and sinter at 600 ℃; after natural cooling, place it in vacuum drying Box drying; using vacuum evaporation method, in SiO 2 On the substrate, prepare Cu / Ni bottom electrode; by radio frequency sputtering, deposit Cu / Ni SiO 2 On the base, TiTe is deposited 3 O 8 -MnO 2 The dielectric film has a sputtering power of 200 W; it is annealed at 400 ℃ to promote the growth of the film; finally, the Cu layer is deposited by vacuum evaporation as the upper electrode to obtain the MIM film capacitor.

Embodiment 3

[0017] The preparation process of thin film capacitors is as follows: First, the SiO 2 The substrate is ultrasonically cleaned; then, the TiO 2 With TeO 2 The powder is mixed and heated at a temperature of 550℃ to obtain TiTe 3 O 8 ; According to the mass ratio of 1:0.4, TiTe 3 O 8 With MnO 2 Mix and perform 24 h ball milling; add 5% mass fraction of PVA particles, press the mixture into a shape under a pressure of 18 MPa, put it in a heating furnace, and sinter at 600 ℃; after natural cooling, place it in vacuum drying Box drying; using vacuum evaporation method, in SiO 2 On the substrate, prepare Cu / Ni bottom electrode; by radio frequency sputtering, deposit Cu / Ni SiO 2 On the base, TiTe is deposited 3 O 8 -MnO 2 The dielectric film has a sputtering power of 200 W; it is annealed at 400 ℃ to promote the growth of the film; finally, the Cu layer is deposited by vacuum evaporation as the upper electrode to obtain the MIM film capacitor.

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Abstract

The invention discloses a high-frequency and voltage-resistant thin film capacitor. An upper Cu electrode, a lower Cu electrode and a TiTe3O8-MnO2 dielectric layer form an MIM structure. In the thin film capacitor having the high-frequency and voltage-resistant characteristic, proposed by the invention, the performance optimization of a thin film is achieved by MnO2-doped TiTe3O8 and by changing aprocess parameter; a TiTe3O8-MnO2 dielectric thin film is deposited by radio frequency magnetron sputtering; the problem of high-temperature sintering of the thin film is solved by low-temperature annealing characteristic of the TiTe3O8-MnO2 dielectric thin film; by annealing, the thin film microstructure and the dielectric performance are controlled; and an MIM-structure thin film capacitor is fabricated by employing the optimized TiTe3O8-MnO2 dielectric thin film deposition process. The high-frequency and voltage-resistant thin film capacitor is simple in preparation process and high in repeatability, and the thin film capacitor is favorable in frequency characteristic and stable in dielectric performance and is resistant to voltage.

Description

Technical field [0001] The invention relates to a high-frequency withstand voltage film capacitor and its preparation technology. By optimizing the preparation process parameters and using low-temperature annealing treatment, a dielectric film with superior dielectric properties can be obtained. It is a film capacitor with stable frequency characteristics and withstand voltage . Background technique [0002] With the continuous improvement of technology, the development of integration technology with large capacity and small volume has been promoted, and higher requirements have been put forward for the technology of dielectric thin film. On the one hand, the use of high-permittivity films is the trend of MIM capacitors. On the other hand, this also brings difficulties and challenges to the frequency characteristics, thermal stability, and voltage withstand capabilities of the capacitors. The dielectric film needs to be annealed and crystallized before it can exhibit better diel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G4/33H01G4/10C23C14/35C23C14/08C23C14/34C23C14/24C23C14/58
CPCC23C14/08C23C14/24C23C14/3414C23C14/35C23C14/5806H01G4/10H01G4/33
Inventor 易蒋孙
Owner 汕头市信音电子科技有限公司