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    • 18. 发明授权
    • Low frequency process-variation-insensitive temperature-stable micromechanical resonators
    • 低频过程变化不敏感的温度稳定微机械谐振器
    • US07859365B2
    • 2010-12-28
    • US12001946
    • 2007-12-13
    • Gavin Kar-Fai HoFarrokh Ayazi
    • Gavin Kar-Fai HoFarrokh Ayazi
    • H03H9/24H03H9/125H03H9/46H03H3/013H03B5/30
    • H03H9/2463H03H3/0076H03H3/0077H03H9/02448H03H2009/02496
    • Disclosed are micromechanical resonators having features that compensate for process variations and provide improved inherent temperature stability. Exemplary resonators may comprise comb drive resonators or parallel-plate drive resonators. The resonators comprise a (silicon-on-insulator) substrate with resonator apparatus formed therein. The resonator apparatus has one or more anchors connected to the substrate, at least one excitation/sense port that is electrically insulated from the substrate, and a resonator. The resonator comprises one or more flexural members connected to the one or more anchors that are separated from the substrate and separated from the excitation/sense port by gaps. A mass is coupled to flexural members, is separated from the substrate, and comprises a grid. Process compensation is achieved using a resonator mass in the form of a grid of lines that form holes or lines through the mass, wherein widths of lines of the grid are approximately ⅓ the width of the flexural members. Temperature stability is provided using silicon dioxide on at least one of the surfaces of the flexural members.
    • 公开了具有补偿工艺变化并提供改进的固有温度稳定性的特征的微机械谐振器。 示例性谐振器可以包括梳状驱动谐振器或平行板驱动谐振器。 谐振器包括其上形成有谐振器装置的(绝缘体上硅)衬底。 谐振器装置具有连接到衬底的一个或多个锚固件,与衬底电绝缘的至少一个激励/感测端口和谐振器。 谐振器包括连接到一个或多个锚固件的一个或多个弯曲构件,所述锚固件与衬底分离并且通过间隙与激励/感测端口分离。 质量联接到弯曲构件,与基底分离,并且包括网格。 使用形成线形网格形式的谐振器质量来实现过程补偿,其中网格线的宽度大约是弯曲构件宽度的1/3。 使用二氧化硅在弯曲构件的至少一个表面上提供温度稳定性。