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    • 66. 发明授权
    • Method for fabricating a thin film bulk acoustic wave resonator (FBAR) on a glass substrate
    • 在玻璃基板上制造薄膜体声波谐振器(FBAR)的方法
    • US06839946B2
    • 2005-01-11
    • US10278612
    • 2002-10-22
    • Markku Antero YlilammiMeeri Talvikki Partanen
    • Markku Antero YlilammiMeeri Talvikki Partanen
    • H01L41/09H01L41/22H03H3/02H03H9/17H04R17/00H01L41/04H01L41/08H01L41/18
    • H03H9/173H03H3/02H03H2003/021Y10T29/42Y10T29/49005Y10T29/49155Y10T29/49156Y10T29/49165
    • A method for fabricating a Thin Film Bulk Acoustic Wave Resonator (FBAR). The method comprises the steps of: (A) forming a sacrificial layer comprising one of a metal and a polymer over a selected portion of a substrate; (B) forming a protective layer on the sacrificial layer and on selected portions of the substrate; (C) forming a bottom electrode layer on a selected portion of the protective layer; (D) forming a piezoelectric layer on a selected portion of the bottom electrode layer and on a selected portion of the protective layer; (E) forming a top electrode on a selected portion of the piezoelectric layer; and (F) removing the sacrificial layer to form an air gap. The use of a metal or a polymer material to form sacrificial layers has several advantages over the use of zinc-oxide (ZnO) to form such layers. In accordance with a further aspect of the invention, an FBAR is provided which includes a glass substrate. The use of glass to form substrates offers several advantages over the use of other materials to form substrates. By example, most types of glass are less expensive than semiconductor materials, and exhibit low permittivity characteristics, and low parasitic capacitances. In addition, most glass materials are substantially loss free when being used in microwave frequency applications.
    • 一种制造薄膜体声波谐振器(FBAR)的方法。 该方法包括以下步骤:(A)在衬底的选定部分上形成包含金属和聚合物之一的牺牲层; (B)在所述牺牲层上和所述衬底的选定部分上形成保护层; (C)在所述保护层的选定部分上形成底部电极层; (D)在所述底电极层的选定部分和所述保护层的选定部分上形成压电层; (E)在所述压电层的选定部分上形成顶部电极; 和(F)去除牺牲层以形成气隙。 使用金属或聚合物材料来形成牺牲层相比于使用氧化锌(ZnO)形成这样的层具有几个优点。 根据本发明的另一方面,提供了一种包括玻璃基板的FBAR。 使用玻璃形成基材提供了优于使用其它材料形成基材的几个优点。 例如,大多数类型的玻璃比半导体材料便宜,并且具有低介电常数特性和低寄生电容。 此外,当用于微波频率应用时,大多数玻璃材料基本上是无损的。
    • 68. 发明申请
    • Film bulk acoustic resonator and method of forming the same
    • 薄膜体声波谐振器及其形成方法
    • US20030193269A1
    • 2003-10-16
    • US10320361
    • 2002-12-17
    • Samsung Electro-Mechanics Co., Ltd.
    • Jae Wook JangKuk Hyun Sunwoo
    • H01L041/08
    • H03H9/173H03H3/04H03H2003/021H03H2003/0442
    • A film bulk acoustic resonator (FBAR) includes an insulation layer on a substrate to prevent a signal from being transmitted to a substrate. The FBAR includes a portion of a membrane layer corresponding to an activation area to adjust a resonance frequency band and improve a transmission gain of the resonance frequency band, the portion of the membrane layer being partially etched to have a thickness less than the other portion of the membrane layer. A method of forming the FBAR includes forming an sacrificing layer made of polysilicon, forming an air gap using a dry etching process, and forming a via hole. The method prevents structural problems occurred in a conventional air gap forming process and provides locations and the number of the via holes to be controlled.
    • 薄膜体声波谐振器(FBAR)包括在基板上的绝缘层,以防止信号被传输到基板。 FBAR包括对应于激活区域的膜层的一部分,以调节共振频带并提高共振频带的透射增益,膜层的部分被部分蚀刻以具有小于另一部分的厚度 膜层。 形成FBAR的方法包括形成由多晶硅制成的牺牲层,使用干蚀刻工艺形成气隙,并形成通孔。 该方法防止了在常规气隙形成过程中发生的结构问题,并提供要控制的通孔的位置和数量。
    • 69. 发明申请
    • Method for fabricating a thin film bulk acoustic wave resonator (FBAR) on a glass substrate
    • 在玻璃基板上制造薄膜体声波谐振器(FBAR)的方法
    • US20030102773A1
    • 2003-06-05
    • US10278612
    • 2002-10-22
    • Markku Antero YlilammiMeeri Talvikki Partanen
    • H02N002/00
    • H03H9/173H03H3/02H03H2003/021Y10T29/42Y10T29/49005Y10T29/49155Y10T29/49156Y10T29/49165
    • A method for fabricating a Thin Film Bulk Acoustic Wave Resonator (FBAR). The method comprises the steps of: (A) forming a sacrificial layer comprising one of a metal and a polymer over a selected portion of a substrate; (B) forming a protective layer on the sacrificial layer and on selected portions of the substrate; (C) forming a bottom electrode layer on a selected portion of the protective layer; (D) forming a piezoelectric layer on a selected portion of the bottom electrode layer and on a selected portion of the protective layer; (E) forming a top electrode on a selected portion of the piezoelectric layer; and (F) removing the sacrificial layer to form an air gap. The use of a metal or a polymer material to form sacrificial layers has several advantages over the use of zinc-oxide (ZnO) to form such layers. In accordance with a further aspect of the invention, an FBAR is provided which includes a glass substrate. The use of glass to form substrates offers several advantages over the use of other materials to form substrates. By example, most types of glass are less expensive than semiconductor materials, and exhibit low permittivity characteristics, and low parasitic capacitances. In addition, most glass materials are substantially loss free when being used in microwave frequency applications.
    • 一种制造薄膜体声波谐振器(FBAR)的方法。 该方法包括以下步骤:(A)在衬底的选定部分上形成包含金属和聚合物之一的牺牲层; (B)在所述牺牲层上和所述衬底的选定部分上形成保护层; (C)在所述保护层的选定部分上形成底部电极层; (D)在所述底电极层的选定部分和所述保护层的选定部分上形成压电层; (E)在所述压电层的选定部分上形成顶部电极; 和(F)去除牺牲层以形成气隙。 使用金属或聚合物材料来形成牺牲层相比于使用氧化锌(ZnO)形成这样的层具有几个优点。 根据本发明的另一方面,提供了一种包括玻璃基板的FBAR。 使用玻璃形成基材提供了优于使用其它材料形成基材的几个优点。 例如,大多数类型的玻璃比半导体材料便宜,并且具有低介电常数特性和低寄生电容。 此外,当用于微波频率应用时,大多数玻璃材料基本上是无损的。