Multilayer ceramic capacitor and method of manufacturing same
By employing a core-shell structure and dielectric grains composed of specific components in the dielectric layer of multilayer ceramic capacitors, the shortcomings of multilayer ceramic capacitors in terms of miniaturization, high capacitance, and high voltage have been overcome. This has resulted in excellent temperature characteristics, withstand voltage characteristics, and DC bias characteristics, thereby improving the reliability and competitiveness of the product.
Patent Information
- Application Number
- CN202511175101.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2025-01-10
- Filing Date
- 2025-08-21
- Publication Date
- 2026-05-26
AI Technical Summary
Existing multilayer ceramic capacitors have shortcomings in miniaturization, high capacitance and high voltage, and it is difficult to simultaneously meet the requirements of excellent temperature characteristics, withstand voltage characteristics and DC bias characteristics.
The dielectric grains in the dielectric layer adopt a core-shell structure, with the core composed of barium and titanium, and the shell composed of zirconium and calcium or strontium. TEM-EDS analysis ensures that the zirconium content in the core is less than 3 moles and the zirconium content in the shell is greater than or equal to 3 moles. Combined with rare earth elements and transition metals, the withstand voltage and temperature characteristics of the dielectric layer are improved.
It achieves high capacitance and high voltage characteristics, while also possessing excellent temperature characteristics, withstand voltage characteristics, and DC bias characteristics, thus improving the reliability and competitiveness of multilayer ceramic capacitors.