共查询到19条相似文献,搜索用时 78 毫秒
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利用有限元分析软件ANSYS建立了FBAR三维振动模型,分析了不同有效区域形状(方形、圆形、非正五边形)、不同有效区域面积(10 000μm~2、15 625μm~2、22 500μm~2、30 625μm~2、40 000μm~2)和不同压电层材料(AlN、ZnO)对其横向杂散模式的影响,得到了阻抗特性曲线及不圆度(NC)。有效区域形状为非正五边形时,得到最平滑的阻抗曲线和最小的NC值为0.015 1;有效区域面积为40 000μm~2时得到最小的NC值为0.005 5;在相同谐振频率(1.76GHz)下,用ZnO作压电材料时得到较小的NC值为0.012 9。 相似文献
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介绍了一种适用于三维堆叠的凸点式晶圆级封装的小型化C波段宽带薄膜体声波滤波器的设计方法,并进行了工艺验证。通过对压电层薄膜进行钪掺杂、材料参数提取、结构模型优化实现了相对带宽大于5%的薄膜体声波滤波器设计。通过表面硅基微机电系统(MEMS)工艺制备与凸点式晶圆级封装实现滤波器制备。研制出标称频率5 800 MHz、插入损耗小于2.8 dB、阻带抑制大于40 dBc、体积仅1.0 mm×1.0 mm×0.35 mm的C波段宽带薄膜体声波滤波器。 相似文献
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《微纳电子技术》2019,(12):984-991
通过磁控溅射靶材的成分调控和一系列优化过的微电子机械系统(MEMS)工艺,成功研制了基于氧化锌(ZnO)压电薄膜的固体装配型薄膜体声波谐振器(FBAR)。通过使用性能优异的靶材,所得到的器件谐振性能良好。在同一种工艺条件下得到多个硅片的中心处FBAR的谐振频率为2.365~2.379 GHz,具有较好的重复性。并且,同一硅片不同位置的器件性能还具有优异的均匀性,S_(11)的平均相对误差很小。尤其谐振频率可以控制在2.359~2.410 GHz,相比之前的1.8~2.4 GHz,其均匀性有了明显的提升。同一硅片上9个FBAR谐振频率的平均相对误差能够低至0.256%。 相似文献
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为了抑制薄膜体声波谐振器(FBAR)的寄生谐振同时满足5G通信的高频需求,基于Comsol Multiphysics仿真软件建立薄膜体声波谐振器的二维和三维有限元模型,研究了压电材料、电极横向尺寸和电极形状对寄生谐振的影响,并讨论了电极框架结构对FBAR并联谐振频率(fp)处的品质因数(Qp)的影响。基于分析,提出并设计了一种双阶梯电极框架结构的FBAR,该结构的FBAR以AlN为压电材料,电极形状为五边形,中心频率为3.504 GHz,串联谐振频率为3.467 GHz,并联谐振频率为3.541 GHz,Qp为1591。Qp与未优化的FBAR相比提高了19.2%,实现了对寄生谐振的有效抑制。 相似文献
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为了正确分析和设计薄膜体声波谐振器(FBAR)器件,需要对谐振器Mason模型中的仿真参数(如机电耦合系数、介电常数及粘滞系数等)进行准确提取。通过简谐近似,在Mason模型中引入了厚度方向位移的横向分量,提高了参数提取的准确性。使用谐振器开路和短路图形的散射参数,提取了探针及测试焊盘的等效电路参数,对谐振器进行去嵌。根据拟合得到的模型参数,仿真了中心频率为5.43 GHz的滤波器。结果表明,采用该方法提取的模型参数仿真结果和滤波器探针测试曲线的通带形状吻合较好。 相似文献
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Ying Chen Pavel I. Reyes Ziqing Duan Gaurav Saraf Richard Wittstruck Yicheng Lu Olena Taratula Elena Galoppini 《Journal of Electronic Materials》2009,38(8):1605-1611
Zinc oxide (ZnO) and its ternary alloy magnesium zinc oxide (Mg
x
Zn1−x
O) are piezoelectric materials that can be used for high-quality-factor bulk acoustic wave (BAW) resonators operating at GHz
frequencies. Thin-film bulk acoustic resonators (TFBARs) are attractive for applications in advanced communication and in
various sensors as they offer the capability of monolithic integration of BAW resonators with radio-frequency integrated circuits
(RF ICs). In this paper we report Mg
x
Zn1−x
O-based TFBAR biosensors. The devices are built on Si substrates with an acoustic mirror consisting of alternating quarter-wavelength
silicon dioxide (SiO2) and tungsten (W) layers to isolate the TFBAR from the Si substrate. High-quality ZnO and Mg
x
Zn1−x
O thin films are achieved through a radio-frequency (RF) sputtering technique. Tuning of the device operating frequency is
realized by varying the Mg composition in the piezoelectric Mg
x
Zn1−x
O layer. Simulation results based on a transmission-line model of the TFBAR show close agreement with the experimental results.
ZnO nanostructures are grown on the TFBAR’s top surface using metal- organic chemical vapor deposition (MOCVD) to form the
nano-TFBAR sensor, which offers giant sensing area, faster response, and higher sensitivity over the planar sensor configuration.
Mass sensitivity higher than 103 Hz cm2/ng is achieved. In order to study the feasibility of the nano-TFBAR for biosensing, the nanostructured ZnO surfaces were
functionalized to selectively immobilize␣DNA, as verified by hybridization with its fluorescence-tagged DNA complement. 相似文献
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Campanella H. Cabruja E. Montserrat J. Uranga A. Barniol N. Esteve J. 《Electron Device Letters, IEEE》2008,29(1):28-30
A thin-film bulk acoustic wave resonator (FBAR) having a floating, 3-D structure above a CMOS substrate is presented. The integration of the FBAR to the CMOS substrate is performed with independence of FBAR or CMOS fabrication technologies. Wafer-level transfer is carried out to obtain a suspended FBAR above CMOS substrates of different technologies, whose resonant frequency is found in the 2.4 GHz band. The electrical interconnection between the FBAR and CMOS is provided by at least two conducting posts, which at the same time offer mechanical support to the resonator's structure. Experimental characterization results and Q-factor comparison with conventional FBAR technologies are discussed. 相似文献
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随着5G通信技术的发展,射频前端器件趋向于集成化、微型化,使得薄膜体声波谐振器(FBAR)技术成为通信领域的研究热点之一。该文对FBAR谐振单元选择不同阶数的梯形级联方式,通过射频仿真软件ADS建立MBVD等效电路模型,实验仿真其性能参数输出曲线,设计出频带区间在工信部规划的5G通信频段(4.8~5.0 GHz)标准内的高频窄带滤波器。实验仿真结果表明,所设计的FBAR频带在4.849~4.987 GHz,增加FBAR单元的级联阶数可以提高带外抑制,其插入损耗很小,满足5G通信系统对滤波器的性能参数要求。 相似文献
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