Invention Grant
US09330849B2 Non-uniform dielectric layer capacitor for vibration and acoustics improvement
有权
用于振动和声学改进的非均匀介质层电容器
- Patent Title: Non-uniform dielectric layer capacitor for vibration and acoustics improvement
- Patent Title (中): 用于振动和声学改进的非均匀介质层电容器
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Application No.: US14285461Application Date: 2014-05-22
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Publication No.: US09330849B2Publication Date: 2016-05-03
- Inventor: Zhong-Qing Gong , Kevin R. Richardson , Yanchu Xu , Connor R. Duke , Benjamin A. Bard
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Blakely, Sokoloff, Taylor & Zafman LLP
- Main IPC: H01G4/30
- IPC: H01G4/30 ; H01G4/12 ; H05K1/18 ; H01G4/255 ; H01G4/005 ; H05K3/34

Abstract:
A Non-Uniform Dielectric Layer, Multi-Layer-Ceramic-Capacitor (MLCC) has upper and lower dielectric layers separating upper and lower electrode layers, where the lower dielectric layers have a greater vertical thickness than the upper dielectric layers to reduce piezoelectric effect driven capacitor reaction forces on a printed circuit board (PCB) on which the capacitor is mounted. Such an MLCC may include an upper set of dielectric layers that separate adjacent pairs of upper electrode layers in a top portion of the MLCC, and a lower set of dielectric layers that separate adjacent pairs of lower electrode layers in a bottom portion of the MLCC. A bottom portion of the MLCC may be mounted on a PCB. The thickness of the lower dielectric layers may be between 1.5 and 3.5 times greater than the upper dielectric layers to reduce piezoelectric effect driven capacitor reaction forces in the audio range of human hearing.
Public/Granted literature
- US20150243440A1 NON-UNIFORM DIELECTRIC LAYER CAPACITOR FOR VIBRATION AND ACOUSTICS IMPROVEMENT Public/Granted day:2015-08-27
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