Miniature high-voltage capacitor and making method thereof

A high-voltage capacitor and miniature technology, which is applied in the direction of capacitors, fixed capacitors, fixed capacitor electrodes, etc., can solve the problems of internal electrode compactness and continuity, etc., achieve good market application prospects, weaken electrode edge effects, and ensure compactness and The effect of continuity
CN102054585AInactive Publication Date: 2011-05-11有研科技集团有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
有研科技集团有限公司
Publication Date
2011-05-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a miniature high-voltage capacitor and a making method thereof. A dielectric layer is made of glass-ceramic materials, an electrode comprises a gold film inside electrode, a silver paste transition electrode, an In-Sn 50 alloy slice and an outside electrode end of a red copper sheet in sequence from inside to outside, and encapsulating material is epoxy resin. The invention provides the miniature high-voltage capacitor which has the diameter phi of 10-25mm, the thickness of 1-2mm, the nominal capacitance of 10pF-1nF, the rated direct-current voltage 10-20kV and the temperature characteristic of X7R. In the capacitor, the volume is greatly reduced, and an inside and outside electrode design technology is adopted, thereby ensuring the compactness and the continuity of the inside electrode, also weakening the electrode edge effect, enhancing the voltage-resisting strength of the capacitor, eliminating the influence of brittle fracture of lamellar medium materials caused in the welding process and supplying a novel design idea and making method for miniaturization and slice for the high-voltage capacitor.
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Description

technical field

[0001] The invention relates to a miniature high-voltage capacitor and a preparation method thereof, in particular to a miniature high-voltage capacitor with glass ceramic material as a dielectric and a preparation method thereof. Background technique

[0002] With the development of the electronic industry's demand for chip high-voltage capacitors, the trend of "miniaturization" and "thinning" of high-voltage capacitors drives people to conduct in-depth research and development on the dielectric materials and internal and external electrode structures that make up capacitors.

[0003] Traditional sintered ferroelectric ceramic materials can obtain high dielectric constant, which has material advantages in the preparation of large-capacity capacitors, especially chip multilayer ceramic capacitors (MLCC) based on it have been widely used. However, due to the many inherent defects such as remaining pores in sintered ceramics, its breakdown strength is relativel...

Claims

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