公开(公告)号：US20100155864A1

公开(公告)日：2010-06-24

申请号：US12719999

申请日：2010-03-09

申请人： Richard I. Laming ,  Mark Begbie ,  Anthony Traynor

发明人： Richard I. Laming ,  Mark Begbie ,  Anthony Traynor

IPC分类号： H01L29/84

CPC分类号： B81C1/00158 ,  B81B2201/0257 ,  B81B2203/0127 ,  B81C99/004 ,  B81C2201/0109 ,  H04R7/10 ,  H04R7/18 ,  H04R19/005 ,  H04R2307/207 ,  Y10S977/733

摘要： A MEMS device, for example a capacitive microphone, comprises a flexible membrane 11 that is free to move in response to pressure differences generated by sound waves. A first electrode 13 is mechanically coupled to the flexible membrane 11, and together form a first capacitive plate of the capacitive microphone device. A second electrode 23 is mechanically coupled to a generally rigid structural layer or back-plate 14, which together form a second capacitive plate of the capacitive microphone device. The capacitive microphone is formed on a substrate 1, for example a silicon wafer. A back-volume 33 is provided below the membrane 11, and is formed using a “back-etch” through the substrate 1. A first cavity 9 is located directly below the membrane 11, and is formed using a first sacrificial layer during the fabrication process. Interposed between the first and second electrodes 13 and 23 is a second cavity 17, which is formed using a second sacrificial layer during the fabrication process. A plurality of bleed holes 15 connect the first cavity 9 and the second cavity 17. Acoustic holes 31 are arranged in the back-plate 14 so as to allow free movement of air molecules, such that the sound waves can enter the second cavity 17. The first and second cavities 9 and 17 in association with the back-volume 33 allow the membrane 11 to move in response to the sound waves entering via the acoustic holes 31 in the back-plate 14. The provision of first and second sacrificial layers has the advantage of protecting the membrane during manufacture, and disassociating the back etch process from the definition of the membrane. The bleed holes 15 aid with the removal of the first and second sacrificial layers. The bleed holes 15 also contribute to the operating characteristics of the microphone.

摘要翻译： MEMS器件，例如电容麦克风，包括响应于由声波产生的压力差而自由移动的柔性膜11。 第一电极13机械耦合到柔性膜11，并且一起形成电容式麦克风装置的第一电容板。 第二电极23机械地耦合到大致刚性的结构层或背板14，它们一起形成电容式麦克风装置的第二电容板。 电容麦克风形成在基板1上，例如硅晶片。 背部体积33设置在膜11下方，并且通过基底1的“背蚀刻”形成。第一腔9位于膜11的正下方，并且在制造期间使用第一牺牲层形成 处理。 介于第一和第二电极13和23之间的是第二腔17，其在制造过程中使用第二牺牲层形成。 多个排放孔15连接第一腔9和第二腔17.声孔31布置在背板14中，以便允许空气分子的自由运动，使得声波可以进入第二腔17。 与背容积33相关联的第一和第二空腔9和17允许膜11响应于通过背板14中的声孔31进入的声波而移动。提供第一和第二牺牲层具有 在制造过程中保护膜的优点，以及使背蚀刻工艺与膜的定义分离。 排出孔15有助于去除第一和第二牺牲层。 排放孔15也有助于麦克风的操作特性。

公开(公告)号：US07781249B2

公开(公告)日：2010-08-24

申请号：US11723514

申请日：2007-03-20

申请人： Richard I. Laming ,  Mark Begbie ,  Anthony Traynor

发明人： Richard I. Laming ,  Mark Begbie ,  Anthony Traynor

IPC分类号： H01L21/00

CPC分类号： B81C1/00158 ,  B81B2201/0257 ,  B81B2203/0127 ,  B81C99/004 ,  B81C2201/0109 ,  H04R7/10 ,  H04R7/18 ,  H04R19/005 ,  H04R2307/207 ,  Y10S977/733

摘要： A MEMS device comprising a flexible membrane that is free to move in response to pressure differences generated by sound waves. A first electrode mechanically coupled to the flexible membrane, and together form a first capacitive plate. A second electrode mechanically coupled to a generally rigid structural layer or back-plate, which together form a second capacitive plate. A back-volume is provided below the membrane. A first cavity located directly below the membrane. Interposed between the first and second electrodes is a second cavity. A plurality of bleed holes connect the first cavity and the second cavity. Acoustic holes are arranged in the back-plate so as to allow free movement of air molecules, such that the sound waves can enter the second cavity. The first and second cavities in association with the back-volume allow the membrane to move in response to the sound waves entering via the acoustic holes in the back-plate.

摘要翻译： 包括柔性膜的MEMS器件，其可响应于由声波产生的压力差而自由移动。 机械地耦合到柔性膜的第一电极，并且一起形成第一电容板。 机械耦合到大致刚性的结构层或背板的第二电极，它们一起形成第二电容板。 在膜的下方提供背部体积。 位于膜下方的第一腔。 介于第一和第二电极之间的是第二腔。 多个排放孔连接第一腔和第二腔。 声孔布置在背板中，以便允许空气分子的自由运动，使得声波可以进入第二腔。 与背容积相关联的第一和第二空腔允许膜响应于通过背板中的声孔进入的声波而移动。

公开(公告)号：US07856804B2

公开(公告)日：2010-12-28

申请号：US12719999

申请日：2010-03-09

申请人： Richard I. Laming ,  Mark Begbie ,  Anthony Traynor

发明人： Richard I. Laming ,  Mark Begbie ,  Anthony Traynor

IPC分类号： H01L29/34

CPC分类号： B81C1/00158 ,  B81B2201/0257 ,  B81B2203/0127 ,  B81C99/004 ,  B81C2201/0109 ,  H04R7/10 ,  H04R7/18 ,  H04R19/005 ,  H04R2307/207 ,  Y10S977/733

摘要： A MEMS device comprising a flexible membrane that is free to move in response to pressure differences generated by sound waves. A first electrode mechanically coupled to the flexible membrane, and together form a first capacitive plate. A second electrode mechanically coupled to a generally rigid structural layer or back-plate, which together form a second capacitive plate. A back-volume is provided below the membrane. A first cavity located directly below the membrane. Interposed between the first and second electrodes is a second cavity. A plurality of bleed holes connected the first cavity and the second cavity. Acoustic holes are arranged in the back-plate so as to allow free movement of air molecules, such that the sound waves can enter the second cavity. The first and second cavities in association with the back-volume allow the membrane to move in response to the sound waves entering via the acoustic holes in the back-plate.

摘要翻译： 包括柔性膜的MEMS器件，其可响应于由声波产生的压力差而自由移动。 机械地耦合到柔性膜的第一电极，并且一起形成第一电容板。 机械耦合到大致刚性的结构层或背板的第二电极，它们一起形成第二电容板。 在膜的下方提供背部体积。 位于膜下方的第一腔。 介于第一和第二电极之间的是第二腔。 多个排放孔连接第一腔和第二腔。 声孔布置在背板中，以便允许空气分子的自由移动，使得声波可以进入第二腔。 与背容积相关联的第一和第二空腔允许膜响应于通过背板中的声孔进入的声波而移动。

公开(公告)号：US20070284682A1

公开(公告)日：2007-12-13

申请号：US11723514

申请日：2007-03-20

申请人： Richard Laming ,  Mark Begbie ,  Anthony Traynor

发明人： Richard Laming ,  Mark Begbie ,  Anthony Traynor

IPC分类号： H01L29/84 ,  H01L21/00 ,  H01L21/31

CPC分类号： B81C1/00158 ,  B81B2201/0257 ,  B81B2203/0127 ,  B81C99/004 ,  B81C2201/0109 ,  H04R7/10 ,  H04R7/18 ,  H04R19/005 ,  H04R2307/207 ,  Y10S977/733

摘要： A MEMS device, for example a capacitive microphone, comprises a flexible membrane 11 that is free to move in response to pressure differences generated by sound waves. A first electrode 13 is mechanically coupled to the flexible membrane 11, and together form a first capacitive plate of the capacitive microphone device. A second electrode 23 is mechanically coupled to a generally rigid structural layer or back-plate 14, which together form a second capacitive plate of the capacitive microphone device. The capacitive microphone is formed on a substrate 1, for example a silicon wafer. A back-volume 33 is provided below the membrane 11, and is formed using a “back-etch” through the substrate 1. A first cavity 9 is located directly below the membrane 11, and is formed using a first sacrificial layer during the fabrication process. Interposed between the first and second electrodes 13 and 23 is a second cavity 17, which is formed using a second sacrificial layer during the fabrication process. A plurality of bleed holes 15 connect the first cavity 9 and the second cavity 17. Acoustic holes 31 are arranged in the back-plate 14 so as to allow free movement of air molecules, such that the sound waves can enter the second cavity 17. The first and second cavities 9 and 17 in association with the back-volume 33 allow the membrane 11 to move in response to the sound waves entering via the acoustic holes 31 in the back-plate 14. The provision of first and second sacrificial layers has the advantage of protecting the membrane during manufacture, and disassociating the back etch process from the definition of the membrane. The bleed holes 15 aid with the removal of the first and second sacrificial layers. The bleed holes 15 also contribute to the operating characteristics of the microphone.

摘要翻译： MEMS器件，例如电容麦克风，包括响应于由声波产生的压力差而自由移动的柔性膜11。 第一电极13机械耦合到柔性膜11，并且一起形成电容式麦克风装置的第一电容板。 第二电极23机械地耦合到大致刚性的结构层或背板14，它们一起形成电容式麦克风装置的第二电容板。 电容麦克风形成在基板1上，例如硅晶片。 背部体积33设置在膜11下方，并且通过基底1的“背蚀刻”形成。第一腔9位于膜11的正下方，并且在制造期间使用第一牺牲层形成 处理。 介于第一和第二电极13和23之间的是第二腔17，其在制造过程中使用第二牺牲层形成。 多个排放孔15连接第一腔9和第二腔17.声孔31布置在背板14中，以便允许空气分子的自由运动，使得声波可以进入第二腔17。 与背容积33相关联的第一和第二空腔9和17允许膜11响应于通过背板14中的声孔31进入的声波而移动。提供第一和第二牺牲层具有 在制造过程中保护膜的优点，以及使背蚀刻工艺与膜的定义分离。 排出孔15有助于去除第一和第二牺牲层。 排放孔15也有助于麦克风的操作特性。

公开(公告)号：US08643129B2

公开(公告)日：2014-02-04

申请号：US12293537

申请日：2007-03-20

申请人： Richard Ian Laming ,  Mark Begbie

发明人： Richard Ian Laming ,  Mark Begbie

IPC分类号： H01L29/84

CPC分类号： B81C1/00158 ,  B81B2201/0257 ,  B81B2203/0127 ,  B81C99/004 ,  B81C2201/0109 ,  H04R7/10 ,  H04R7/18 ,  H04R19/005 ,  H04R2307/207 ,  Y10S977/733

摘要： A micro-electrical-mechanical device comprises: a transducer arrangement having at least a membrane being mounted with respect to a substrate; and electrical interface means for relating electrical signals to movement of the membrane; in which the transducer arrangement comprises stress alleviating formations which at least partially decouple the membrane from expansion or contraction of the substrate.

摘要翻译： 微电气机械装置包括：换能器装置，其至少具有相对于基板安装的膜; 以及用于将电信号与膜的运动相关联的电接口装置; 其中所述换能器装置包括至少部分地将所述膜与所述基底的膨胀或收缩分离的应力缓解结构。

公开(公告)号：US20090278217A1

公开(公告)日：2009-11-12

申请号：US12293537

申请日：2007-03-20

申请人： Richard Ian Laming ,  Mark Begbie

发明人： Richard Ian Laming ,  Mark Begbie

IPC分类号： H01L29/84 ,  B06B1/00

CPC分类号： B81C1/00158 ,  B81B2201/0257 ,  B81B2203/0127 ,  B81C99/004 ,  B81C2201/0109 ,  H04R7/10 ,  H04R7/18 ,  H04R19/005 ,  H04R2307/207 ,  Y10S977/733

摘要： A micro-electrical-mechanical device comprises: a transducer arrangement having at least a membrane being mounted with respect to a substrate; and electrical interface means for relating electrical signals to movement of the membrane; in which the transducer arrangement comprises stress alleviating formations which at least partially decouple the membrane from expansion or contraction of the substrate.

摘要翻译： 微电气机械装置包括：换能器装置，其至少具有相对于基板安装的膜; 以及用于将电信号与膜的运动相关联的电接口装置; 其中所述换能器装置包括至少部分地将所述膜与所述基底的膨胀或收缩分离的应力缓解结构。