Invention Grant
- Patent Title: Dielectric ceramic and multilayer ceramic capacitor
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Application No.: US17496044Application Date: 2021-10-07
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Publication No.: US12283429B2Publication Date: 2025-04-22
- Inventor: Taku Mizuno , Keisuke Araki , Hiroyuki Wada
- Applicant: Murata Manufacturing Co., Ltd.
- Applicant Address: JP Nagaokakyo
- Assignee: Murata Manufacturing Co., Ltd.
- Current Assignee: Murata Manufacturing Co., Ltd.
- Current Assignee Address: JP Nagaokakyo
- Agency: ArentFox Schiff LLP
- Priority: JP2020-179755 20201027
- Main IPC: H01G4/12
- IPC: H01G4/12 ; C04B35/46 ; C04B35/468 ; H01G4/30

Abstract:
A dielectric ceramic that includes multiple crystal grains, each of the multiple crystal grains having an interface, a barium titanate (BaTiO3)-based compound as a main component thereof, and a rare earth element. The dielectric ceramic has a cross-section in which the multiple crystal grains has a concentration varying region, a high concentration region, and a low concentration region. The concentration varying region has an RE/Ti ratio differing by 3% or more. The high concentration region has an RE/Ti ratio of 5% to 20%. The low concentration region has an RE/Ti ratio of 0% to 2%.
Public/Granted literature
- US20220130608A1 DIELECTRIC CERAMIC AND MULTILAYER CERAMIC CAPACITOR Public/Granted day:2022-04-28
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