发明名称 |
Dielectric constant measuring apparatus, dielectric constant measuring method, and information recording/reproducing apparatus |
摘要 |
A dielectric constant measuring apparatus for measuring a dielectric constant of a dielectric substance is provided with: a cantilever having a small projection on a tip side of a cantilevered electric conductor; an electrode which is placed around the cantilever and is earthed; an inductor (L) placed so as to constitute a resonance circuit together with a capacitance (Cs) in a small area of the dielectric substance that the cantilever contacts; an oscillating device connected to the resonance circuit; a demodulating device for demodulating an oscillation frequency of the oscillating device; and a dielectric constant detecting device for detecting a dielectric constant information from a demodulation signal of the demodulating. The dielectric constant measuring apparatus can be applied to an information recording/reproducing apparatus using a dielectric record medium.
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申请公布号 |
US7218600(B2) |
申请公布日期 |
2007.05.15 |
申请号 |
US20040489170 |
申请日期 |
2004.08.02 |
申请人 |
PIONEER CORPORATION |
发明人 |
CHO YASUO;ONOE ATSUSHI |
分类号 |
G11B7/00;G01Q40/02;G01Q60/00;G01Q60/24;G01Q60/46;G01Q80/00;G01R27/26 |
主分类号 |
G11B7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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