Patent Publication Number: US-2023156911-A1

Title: Flexible wiring body, driving system, and imaging device

Description:
TECHNICAL FIELD 
     The present invention relates to a flexible wiring body, a driving system, and an imaging device. 
     The invention claims priority based on JP-A-2020-021006 filed in Japan on Feb. 10, 2020, and the description thereof is incorporated herein. 
     BACKGROUND ART 
     Camera of smartphones or the like include ones having a mechanical optical image stabilization (OIS) function and a mechanical focusing function. Such cameras are achieved by translating a lens with a voice coil motor (VCM). 
     On the other hand, there is also an OIS system that moves an image sensor (CMOS imager or the like) instead of moving a lens. The rotation of the lens about its center axis does not achieve any effect, whereas the movement of the image sensor can correct camera shake in a rotation direction, which is a feature of the sensor shift type OIS system. Such an OIS system was too large and expensive for a smartphone, and was therefore employed only in a single-lens reflex camera. 
     However, in recent years, there is an increasing demand for adopting a sensor shift type OIS system for a smartphone. In order to be mounted on a smartphone, the OIS system needs to be made sufficiently small and manufactured at a lower cost, and thus the use of micro electro mechanical systems (MEMS) technology has been studied. 
     An actuator that translates and rotates can be achieved with substantially the same footprint as an imaging element by using MEMS technology. However, when adopting a design in which a large displacement of several tens of pm or more is generated in multiple axes, a generated force of the actuator is reduced. On the other hand, several tens of wires need to be taken out from the image sensor, and some of the wires are high-frequency wires for high-speed communication, and some other wires are power supply wires for supplying a current to the image sensor, which has a large power consumption. In order to move the image sensor, such wires need to be moved (dragged) together, and resistances thereof become a large load for the small actuator. Therefore, in order to achieve a compact OIS system of the sensor shift type, one of the keys is how to take out the wires from the image sensor while increasing the generated force of the actuator. 
     In the related art, there is a multi-axis MEMS assembly that includes a MEMS actuator configured to perform three-axis movement. For example, there is disclosed a MEMS actuator including a conductive bent part having one end mounted to a MEMS actuator core and the other end mounted to an outer frame, in which the conductive bent part supplies an electric signal from an image sensor on the MEMS actuator core to the outer frame (PTL 1). Further, there is disclosed a MEMS actuator that has a structure in which a U-shaped thin film wire connected to an outer frame and an inner frame is raised upward by pressing the outer frame from the periphery thereof and fixing bars constituting the outer frame with a latch structure (PTL 2). In this MEMS actuator, the U-shaped thin film wire is deformed to fall or rise in accordance with the movement of the image sensor, thereby reducing a mechanical load (mechanical resistance) of a large number of wires. 
     CITATION LIST 
     Patent Literature 
     PTL 1: US Patent Application Publication No. 2019/0227266 
     PTL 2: US Patent Application Publication No. 2015/0341534 
     SUMMARY OF INVENTION 
     Technical Problem 
     However, the technique according to PTL 1 does not disclose whether the conductive bent part allows both a high-frequency signal for high-speed communication and a large current for driving the image sensor to flow, and thus there is room for improvement. Further, according to the technique according to PTL 2, a structure of the outer frame is complex and an assembly process of the MEMS actuator is complicated, and there is a concern of positioning performance of the image sensor mounted to the MEMS actuator. 
     An object of the invention is to provide a flexible wiring body, a driving system, and an imaging device that can stably flow both a high-frequency signal for high-speed communication and a large current for driving an image sensor, can improve positioning performance of the image sensor mounted to an actuator, and can cope with large-scale production without requiring a complicated assembly process. 
     SOLUTION TO PROBLEM 
     In order to achieve the above object, the invention provides the following solutions. 
     [1] A flexible wiring body configured to connect a semiconductor element and a frame positioned outer than the semiconductor element, the semiconductor element being configured to move along with an actuator configured to perform at least one among translations in three directions orthogonal to one another and rotations about axes in the three directions, the flexible wiring body including: 
     a main part mounted with the semiconductor element and electrically connected to the semiconductor element; and a plurality of arm parts extending from the main part toward the frame and configured to be bent three-dimensionally. 
     [2] The flexible wiring body according to the above [1], in which 
     the arm parts are bent to have a main surface that intersects with a main surface of the main part, and are further bent by folding back, and 
     the deformation of the arm parts provides freedom in rotations around axes in a horizontal direction and a vertical direction of the semiconductor element, and a direction perpendicular to a main surface of the semiconductor element. 
     [3] The flexible wiring body according to the above [1] or [2], in which 
     the number of the plurality of arm parts is four or more. 
     [4] The flexible wiring body according to any one of the above [1] to [3], in which in a plan view of the main part, the plurality of arm parts are disposed symmetrically with respect to the main part, and 
     the plurality of arm parts are bent by folding back to maintain a state where forces due to elastic deformation are balanced. 
     [5] The flexible wiring body according to any one of the above [1] to [4], in which 
     the arm parts include:
         a first portion having a main surface substantially perpendicular to a main surface of the main part;   a second portion provided at one end of the first portion and bent by folding back;   a third portion disposed facing the first portion; and   a fourth portion provided at one end of the third portion and having a main surface substantially parallel to the main surface of the main part, and       

     the first portion, the second portion and the third portion are disposed substantially perpendicular to the main surface of the main part. 
     [6] The flexible wiring body according to any one of the above [1] to [5], in which 
     the arm parts include a resin layer and a plurality of linear conductive wires formed in parallel on the resin layer and insulated from each other. 
     [7] The flexible wiring body according to the above [6], in which 
     the plurality of arm parts have a total of 20 or more of the conductive wires. 
     [8] A driving system including: 
     an actuator configured to perform at least one among translations in three directions orthogonal to one another and rotations about axes in the three directions; and 
     the flexible wiring body according to any one of the above [1] to [7], in which 
     the actuator includes:
         a base fixed to a substrate;   a movable portion mounted with the main part of the flexible wiring body and the semiconductor element; and   a plurality of springs connecting the base and the movable portion.       

     [9] The driving system according to the above [8], further including: 
     at least one displacement sensor configured to measure displacement of at least one of the movable portion and the plurality of springs. 
     The driving system according to the above [8], in which 
     the actuator is formed by MEMS. 
     [11] The driving system according to any one of the above [8] to [10], in which 
     the actuator is an electrostatic actuator. 
     [12] The driving system according to any one of the above [8] to [10], in which 
     the actuator is an electromagnetic actuator. 
     [13] The driving system according to the above [12], in which 
     the actuator is provided with a MEMS mounted on the substrate, and at least one coil provided within the substrate and electrically connected to an external circuit, and 
     the MEMS includes a base supported by the substrate, a movable portion fixed to the main part of the flexible wiring body and the semiconductor element, a plurality of springs connecting the base and the movable portion, and at least one magnetic body mounted to the movable portion. 
     The driving system according to the above [13], in which 
     the magnetic body is formed using a magnetic powder or a plated magnetic material, and is embedded in the movable portion. 
     The driving system according to the above [14], in which 
     the magnetic powder is bonded together by means of a deposited film or a resin binder. 
     [16] The driving system according to any one of the above [8] to [13], in which 
     the semiconductor element is an image sensor. 
     An imaging device includes the driving system according to the above [16], in which 
     the driving system is configured to perform one or both of optical image stabilization and focus adjustment by driving the image sensor. 
     Advantageous Effect 
     According to the invention, it is possible to provide a flexible wiring body, a driving system, and an imaging device that can stably flow both a high-frequency signal for high-speed communication and a large current for driving an image sensor, can improve positioning performance of the imaging element mounted to an actuator, and can cope with large-scale production without requiring a complicated assembly process. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG.  1    is an exploded perspective view schematically showing a configuration of an imaging device according to an embodiment of the invention. 
       (a) of  FIG.  2    is a plan view schematically showing a configuration of a driving system in  FIG.  1   , and (b) of  FIG.  2    is a cross-sectional view taken along a line I-I′ in (a) of  FIG.  2   . 
         FIG.  3    is a partially enlarged cross-sectional view of (b) of  FIG.  2   . 
         FIG.  4    is a developed view of a flexible wiring body in (a) of  FIG.  2   . 
       (a) of  FIG.  5    is a bottom view schematically showing a configuration of an actuator in (b) of  FIG.  2   , (b) of  FIG.  5    is a schematic cross-sectional view taken along a line II-II′ in (a) of  FIG.  5   , and (c) of  FIG.  5    is an enlarged cross-sectional view of an insulating portion in (b) of  FIG.  5   . 
       (a) of  FIG.  6    is a plan view showing a modification of a driving system in (a) of  FIG.  2   , and (b) of  FIG.  6    is a cross-sectional view taken along a line III-III′ in (a) of  FIG.  6   . 
         FIG.  7    is a partially enlarged cross-sectional view of (b) of  FIG.  6   . 
         FIG.  8    is a developed view of a flexible wiring body in (a) of  FIG.  6   . 
         FIG.  9    is a plan view showing another modification of a flexible wiring body in  FIG.  4   . 
       (a) of  FIG.  10    is a partial plan view showing a state where a flexible wiring body of  FIG.  9    is mounted on the actuator, and (b) of  FIG.  10    is a partial cross-sectional view of (a) of  FIG.  10   . 
         FIG.  11    is a plan view showing another modification of the flexible wiring body in  FIG.  4   . 
       (a) of  FIG.  12    is a partial plan view showing a state where a flexible wiring body of  FIG.  11    is mounted on the actuator, and (b) of  FIG.  12    is a partial cross-sectional view of (a) of  FIG.  12   . 
         FIG.  13    is a bottom view showing a modification of an actuator of  FIG.  5   . 
         FIG.  14    is a bottom view showing another modification of the actuator of  FIG.  5   . 
         FIG.  15    is a cross-sectional view showing a modification of the actuator in (b) of  FIG.  2   . 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     Hereinafter, the embodiments of the invention will be described in detail with reference to drawings. In the drawings used in the following description, in order to facilitate understanding of features of the invention, the featured parts may be shown in an enlarged manner for convenience. Therefore, for example, dimensional ratios of the constituent elements may not be the same as the actual ones. 
       FIG.  1    is an exploded perspective view schematically showing a configuration of an imaging device according to an embodiment of the invention. As shown in  FIG.  1   , an imaging device  1  includes a lens  2 , an AF unit  3 , a glass member  4 , a cover member  5 , a semiconductor element  6 , and a driving system  7 . The imaging device  1  is not particularly limited, and for example, is a camera mounted on a mobile device such as a smartphone. The semiconductor element  6  is, for example, an image sensor. In the present embodiment, the driving system  7  performs one or both of optical image stabilization and focus adjustment by driving the semiconductor element  6  as an imaging element. 
     (a) of  FIG.  2    is a plan view schematically showing a configuration of the driving system  7  in  FIG.  1   , (b) of  FIG.  2    is a cross-sectional view taken along a line I-I′ in (a) of  FIG.  2    and  FIG.  3    is a partially enlarged cross-sectional view of (b) of  FIG.  2   . 
     The driving system  7  includes an actuator  71 A that performs at least one among translations in three directions orthogonal to one another (for example, XYZ directions) and rotations about axes in the three directions, and a flexible wiring body  73 A that connects the semiconductor element  6  and a frame  72  positioned outer than the semiconductor element  6 . The semiconductor element  6  moves along with the actuator  71 A. In the present embodiment, the actuator  71 A performs movements including translations in the X direction and the Y direction, and rotation around an axis in the Z direction (ez direction) among the XYZ directions orthogonal to one another. 
     The flexible wiring body  73 A is provided with a main part  731 A mounted with the semiconductor element  6  and electrically connected to the semiconductor element  6 , and a plurality of arm parts  732 A extending from the main part  731 A toward the frame  72  and bent three-dimensionally. In the present embodiment, the flexible wiring body  73 A includes four arm parts  732 A, and the four arm parts  732 A are disposed line-symmetrically with respect to a line extending in the Y direction through a center of the main part  731 A in the plan view, for example. 
     Each arm part  732 A is bent to have a main surface  732   a  that intersects with a main surface  731   a  of the main part  731 A ((b) of  FIG.  2   ), and is further bent by folding back ((a) of  FIG.  2   ). Deformation of the arm parts  732 A provides freedom in rotations around the axes in a horizontal direction (X direction) and a vertical direction (Y direction) of the semiconductor element  6 , and a direction perpendicular to a main surface of the semiconductor element  6  (Z direction). 
     The flexible wiring body  73 A includes the four arm parts  732 A, but the invention is not limited thereto, and may include four or more arm parts  732 A. Further, it is preferable that in the plan view of the main part  731 A, the plurality of arm parts  732 A are disposed symmetrically with respect to the main part  731 A, and the plurality of arm parts  732 A are bent by folding back to maintain a state where forces due to elastic deformation are balanced. However, the forces due to the elastic deformation do not necessarily have to be balanced. The plurality of arm parts  732 A may be disposed symmetrically with respect to the main part  731 A, the plurality of arm parts  732 A may be bent by folding back, and a state where no forces due to elastic deformation occur in any of the plurality of arm parts  732 A may be maintained. Accordingly, a driving power of the actuator  71 A can be reduced, and power saving can be achieved. 
     Specifically, each arm part  732 A includes a first portion  732 Aa having a main surface  732   a  substantially perpendicular to the main surface  731   a  of the main part  731 A, a second portion  732 Ab provided at one end of the first portion  732 Aa and bent by folding back, a third portion  732 Ac facing the first portion  732 Aa, and a fourth portion  732 Ad provided at one end of the third portion  732 Ac and having a main surface  732   b  substantially parallel to the main surface  731   a  of the main part  731 A. The first portion  732 Aa, the second portion  732   b  and the third portion  732 Ac are disposed substantially perpendicular to the main surface  731   a  of the main part  731 A. 
     The main part  731 A is fixed to an upper surface  711   a  of a stage portion  711 A via an adhesive layer  74 A. In addition, the first portion  732 Aa of the arm part  732 A is fixed to a side surface  711   b  of the stage portion  711 A via an adhesive layer  75 A, and the fourth portion  732 Ad of the arm part  732 A is fixed to an upper surface  72   a  of the frame  72  via an adhesive layer  76 A ( FIG.  3   ). The main part  731 A moves along with the movements of the stage portion  711 A in the X direction, the Y direction and/or the ez direction, and the second portion  732 Ab and the third portion  732 Ac of the arm part  732 A are deformed due to the movement of the main part  731 A. 
       FIG.  4    is a developed view of the flexible wiring body  73 A in (a) of  FIG.  2   . In the present embodiment, a three-dimensional structure as shown in (a) and (b) of  FIG.  2    is formed by folding the flexible wiring body  73 A as a mountain fold along lines L 1 , L 1  in  FIG.  4    and bending intermediate portions of the four arm parts  732 A by folding back. 
     The flexible wiring body  73 A includes a resin layer  733 A and a plurality of linear conductive wires  734 A formed in parallel on the resin layer  733 A and insulated from each other. That is, the main part  731 A and the arm parts  732 A are formed by the resin layer  733 A and the plurality of linear conductive wires  734 A formed in parallel on the resin layer  733 A and insulated from each other. The resin layer  733 A may include a single layer, or may include a plurality of layers made of different materials. Each of the plurality of conductive layers  734 A may also include a single layer, or may include a plurality of layers made of different materials. The conductive layer  734 A has one end portion  734 Aa electrically connected to the semiconductor element  6  via a wire portion  77  such as a bonding wire made of a metal, and the other end portion  734 Ab electrically connected to a connector terminal (not shown) ( FIG.  3   ). A thickness of the resin layer  733 A is, for example, 10 μm to 30 μm, and a thickness of the conductive layer  734 A is, for example, 5 μm to 15 μm. The resin layer  733 A is made of, for example, polyimide (PI), and the conductive layer  734 A is made of, for example, copper (Cu). Although the conductive layer includes a single layer in  FIG.  3   , the conductive layer may include a plurality of layers to perform more complicated wiring. Further, an insulating protective layer may be formed on the conductive layer. In addition, although only the semiconductor element  6  is mounted on the flexible wiring body  73 A in  FIG.  3   , other elements may be mounted as well. 
     The plurality of arm parts  732 A preferably have a total of 20 or more of the conductive wires  734 A. In the present embodiment, each arm part  732 A is provided with five conductive wires  734 A, and the plurality of arm parts  732 A have a total of 20 conductive wires  734 A. However, as long as a total of 20 or more of the conductive wires  734 A are provided, the number of the arm parts and the number of the conductive wires of each arm part are not limited and can be appropriately changed according to specifications. Accordingly, it is possible to sufficiently cope with an increase in the number of wires due to high functionality of the semiconductor element  6  or the like. In the present embodiment, line widths of the  20  conductive wires  734 A in the plan view are the same, but the invention is not limited thereto, and the line widths of the  20  conductive wires  734 A may be different. For example, the plurality of conductive wires  734 A may include a conductive wire for communication that has a small width and a conductive wire for power that has a large width. Accordingly, in the plurality of conductive wires  734 A, a conductive layer through which a high frequency signal for high-speed communication flows and a conductive wire through which a large current for driving the imaging element flows can be provided, and both the high frequency signal for high-speed communication and the large current for driving the imaging element can flow through the flexible wiring body  73 A. 
     A method of forming the flexible wiring body  73 A is not particularly limited, and the flexible wiring body  73 A can be formed by, for example, a subtractive method of forming a circuit by etching a copper foil of a copper laminate, or a semi-additive method of forming a circuit on an insulating base material having a conductive layer by an electrolytic copper plating process. 
     (a) of  FIG.  5    is a bottom view schematically showing a configuration of the actuator  71 A in (b) of  FIG.  2   , (b) of  FIG.  5    is a schematic cross-sectional view taken along a line II-II′ in (a) of  FIG.  5   , and (c) of  FIG.  5    is an enlarged cross-sectional view of an insulating portion in (b) of  FIG.  5   . In the present embodiment, the actuator  71 A is an electrostatic actuator. 
     The actuator  71 A includes a plurality of bases  712 A fixed to a substrate  8 , a movable portion  713 A mounted with the main part  731 A of the flexible wiring body  73 A and the semiconductor element  6  via the stage portion  711 A, and a plurality of springs  714 A connecting the bases  712 A and the movable portion  713 A. As long as the actuator  71 A includes the bases  712 A, the movable portion  713 A and the plurality of springs  714 A, the form thereof is not limited, and the actuator  71 A is formed by, for example, MEMS from the viewpoint of miniaturization and ease of manufacture. 
     Specifically, the plurality of bases  712 A include fixing portions X 11 , X 12 , GND 14 , GND 15 , GND 14 , and  812  disposed on one end side of the actuator  71 A with respect to the X direction, and fixing portions X 21 , X 22 ,  822 , GND 23 , GND 25 , and GND 23  disposed on the other end side of the actuator  71 A with respect to the X direction. The symbol “X” of the fixing portions indicates a portion where a voltage is applied when the movable portion  713 A is to be translated in the X direction, the symbol “GND” indicates a portion to be grounded, and the symbol “θ” indicates a portion where a voltage is applied when the movable portion  713 A is to be rotated in the θz direction. The fixing portions X 11  and X 12  are connected to the substrate  8  via an extraction electrode  79 A. Since the other fixing portions have the same configuration, the description thereof will be omitted. 
     The two fixing portions X 11 , X 12  are formed with comb teeth of one side of a comb electrode, and comb teeth of the other side are formed in a first movable portion  713 AA to be described later. The four fixing portions GND 14 , GND 14 , GND 15 , and θ 12  are respectively connected to the first movable portion  713 AA to be described later via a first spring  714 AA. Further, the two fixing portions X 21 , X 22  are each formed with comb teeth of one side of a comb electrode, and comb teeth of the other side are formed in a first movable portion  713 AB to be described later. The four fixing portions θ 22 , GND 23 , GND 25 , and GND 23  are each connected to the first movable portion  713 AB to be described later via the first spring  714 AA. 
     In addition, the plurality of bases  712 A include fixing portions Y 11 , Y 12 , GND 31 , GND 35 , GND 31 , and θ 31  disposed on one end side of the actuator  71 A with respect to the Y direction, and fixing portions Y 21 , Y 22 , θ 41 , GND 42 , GND 45 , and GN 42  disposed on the other end side of the actuator  71 A with respect to the Y direction. The symbol “Y” of the fixing portions indicates a portion where a voltage is applied when the movable portion  713 A is to be moved in the Y direction, the symbol “GND” indicates a portion to be grounded, and the symbol “θ” indicates a portion where a voltage is applied when the movable portion  713 A is to be rotated in the θz direction. 
     The two fixing portions Y 11 , Y 12  are formed with comb teeth of one side of a comb electrode, and comb teeth of the other side are formed in a first movable portion  713 AC to be described later. The four fixing portions GND 31 , GND 35 , GND 31 , and θ 31  are each connected to the first movable portion  713 AC to be described later via the first spring  714 AA. Further, the two fixing portions Y 21 , Y 22  are each formed with comb teeth of one side of a comb electrode, and comb teeth of the other are formed in a first movable portion  713 AD to be described later. The four fixing portions θ 22 , GND 23 , GND 25 , and GND 23  are each connected to the first movable portion  713 AD to be described later via the first spring  714 AA. 
     The movable portion  713 A includes the four first movable portions  713 AA,  713 AB,  713 AC and  713 AD which are disposed at four sides (XY directions) of a second movable portion to be described later, a second movable portion  713 AE disposed in the centers of the four first movable portions  713 AA to  713 AD, connected to the four first movable portions  713 AA to  713 AD via a plurality of second springs  714 AB, and having a substantially cross shape in the plan view, and a third movable portion  713 AF disposed in a center of the second movable portion  713 AE, connected to the second movable portion  713 AE via a plurality of third springs  714 AC, and having a substantially X shape in the plan view. 
     The first movable portions  713 AA,  713 AB,  713 AC and  713 AD are, for example, frames having a substantially double cross shape in the plan view. The fixing portions GND 14 , GND 15 , GND 14 , and  812  are disposed on both sides of the first movable portion  713 AA in the Y direction, and the fixing portions X 11  and X 12  are disposed on an inner side of the first movable portion  713 AA. Further, the fixing portions  822 , GND 23 , GND 25 , and GND 23  are disposed on both sides of the first movable portion  713 AB in the Y direction, and the fixing portions X 21  and X 22  are disposed on an inner side of the first movable portion  713 AB. Similarly, the fixing portions GND 31 , GND 35 , GND 31 , and  831  are disposed on both sides of the first movable portion  713 AC in the X direction, and the fixing portions Yll and Y 12  are disposed on an inner side of the first movable portion  713 AC. Further, the fixing portions θ 41 , GND 42 , GND 45 , and GND 42  are disposed on both sides of the first movable portion  713 AD in the X direction, and the fixing portions Y 21  and Y 22  are disposed on an inner side of the first movable portion  713 AD. 
     The fixing portions GND 14 , GND 15 , GND 14 , and θ 12  are each connected to the first movable portion  713 AA via the first spring  714 AA. The fixing portions  022 , GND 23 , GND 25 , and GND 23  are each connected to the first movable portion  713 AB via the first spring  714 AA. The fixing portions GND 31 , GND 35 , GND 31 , and  031  are each connected to the first movable portion  713 AC via the first spring  714 AA. The fixing portions θ 41 , GND 42 , GND 45 , and GND 42  are each connected to the first movable portion  713 AD via the first spring  714 AA. In addition, the plurality of first springs  714 AA also function as an electrical connection portion in addition to functioning as a mechanical connection portion. 
     The first movable portion  713 AA is provided with insulating portions  715 AA and  715 AB for insulating the fixing portion GND 14  from the fixing portions θ 12  and GND 15 . The first movable portion  713 AB is provided with insulating portions  715 AC and  715 AD for insulating the fixing portion GND 23  from the fixing portions θ 22  and GND 25 . The first movable portion  713 AC is provided with insulating portions  715 AE and  715 AF for insulating the fixing portion GND 31  from the fixing portions  031  and GND 35 . The first movable portion  713 AD is provided with insulating portions  715 AG and  715 AH for insulating the fixing portion GND 42  from the fixing portions θ 41  and GND 45 . The above insulating portions are formed of, for example, a single layer or a plurality of layers made of a material such as silicon nitride (SiN) or polysilicon (p-Si), and is formed by trench isolation or the like. 
     In the present embodiment, the fixing portion X 11  has the same potential as the fixing portion X 21 , and the fixing portion X 12  has the same potential as the fixing portion X 22 . The fixing portion Yll has the same potential as the fixing portion Y 21 , and the fixing portion Y 12  has the same potential as the fixing portion Y 22 . When a voltage is applied to the fixing portions X 11  and X 21 , the first movable portions  713 AA and  713 AB move in one side in the X direction (for example, +X direction), and when a voltage is applied to the fixing portions X 12  and X 22 , the first movable portions  713 AA and  713 AB move in the other side in the X direction (for example, −X direction). On the other hand, when a voltage is applied to the fixing portions Y 11  and Y 21 , the first movable portions  713 AC and  713 AD move in one side in the Y direction (for example, +Y direction), and when a voltage is applied to the fixing portions Y 12  and Y 22 , the first movable portions  713 AC and  713 AD move in the other side in the Y direction (for example, −Y direction). 
     The second movable portion  713 AE is, for example, a frame-shaped body having a substantially cross-shaped outline in the plan view, and is connected to the four first movable portions  713 AA,  713 AB,  713 AC, and  713 AD via the eight second springs  714 AB. Two of the second springs  714 AB are disposed on one end side of the second movable portion  713 AE in the X direction, and two of the second springs  714 AB are disposed on the other end side thereof. Further, two of the second springs  714 AB are disposed on one end side of the second movable portion  713 AE in the Y direction, and two of the second springs  714 AB are disposed on the other end side thereof. The second springs  714 AB are designed such that the second movable portion  713 AE moves in one direction (one of X direction and Y direction). 
     The second movable portion  713 AE is formed with comb teeth constituting one sides of a plurality of comb electrodes, and comb teeth constituting the other sides of the plurality of comb electrodes are formed at the third movable portion  713 AF. In the present embodiment, four comb electrodes are disposed between the second movable portion  713 AE and the third movable portion  713 AF to be rotationally symmetric by  180  degrees with respect to a center of the third movable portion  713 AF. 
     The second movable portion  713 AE includes six moving portions  851 ,  852 , GND 55 ,  861 ,  862 , and GND 65  provided to surround the third movable portion  713 AF. The moving portions  851 ,  852 , GND 55 ,  861 ,  862 , and GND 65  are disposed to be rotationally symmetric by 180 degrees with respect to the center of the third movable portion  713 AF. The symbol “GND” of the moving portions indicates a portion to be grounded, and the symbol “θ” indicates a portion where a voltage is applied when the second movable portion  713 AE is to be rotated in the  8   z  direction. 
     The moving portion θ 51  is connected to the fixing portion  831  via the second spring  714 AB and the first spring  714 AA. The moving portion  852  is connected to the fixing portion  822  via the second spring  714 AB and the first spring  714 AA. The moving portion GND 55  is connected to the fixing portions GND 15  and GND 35  via the second spring  714 AB and the first spring  714 AA, respectively. The moving portion θ 61  is connected to the fixing portion θ 41  via the second spring  714 AB and the first spring  714 AA. The moving portion θ 62  is connected to the fixing portion θ 12  via the second spring  714 AB and the first spring  714 AA. The moving portion GND 65  is connected to the fixing portions GND 25  and GND 45  via the second spring  714 AB and the first spring  714 AA, respectively. In addition, the plurality of second springs  714 AB and first springs  714 AA also function as an electrical connection portion in addition to functioning as a mechanical connection portion. 
     Insulating portions  716 AA,  716 AB,  716 AC,  716 AD,  716 AE, and  716 AF are provided between adjacent moving portions of the six moving portions θ 51 , θ 52 , GND 55 , θ 61 , θ 62 , and GND 65 . The above insulating portions include, for example, a single layer or a plurality of layers made of a material such as SiN or p-Si, and is formed by trench isolation or the like. In the present embodiment, as shown in (c) of  FIG.  5   , the insulating portion  716 AB includes a first layer  716 ABa made of SiN and a second layer  716 ABb made of p-Si. Since the insulating portions  716 AA and  716 AC to  716 AF have the same configuration as the insulating portion  716 AB, the description thereof will be omitted. 
     The third movable portion  713 AF is, for example, a frame-shaped body having a substantially X shape in the plan view, and is connected to the second movable portion  713 AE via the plurality of third springs  714 AC. The plurality of third springs  714 AC also function as an electrical connection portion in addition to functioning as a mechanical connection portion. One end side of the third movable portion  713 AF in the X direction is provided with a third spring  714 AC, and the other end side thereof is also provided with a third spring  714 AC. Further, one end side of the third movable portion  713 AF in the Y direction is provided with a third spring  714 AC, and the other end side thereof is also provided with a third spring  714 AC. In the present embodiment, the four third springs  714 AC are disposed to be line-symmetric with respect to a line corresponding to y=x or y=−x with the center of the third movable portion  713 AF as an origin. The third movable portion  713 AF is fixed to the stage portion  711 A via an adhesive layer  78 A ((b) of  FIG.  2   ). 
     In the present embodiment, the moving portion θ 51  has the same potential as the fixing portion θ 31 , and the moving portion θ 52  has the same potential as the fixing portion θ 22 . The moving portion θ 61  has the same potential as the fixing portion θ 41 , and the moving portion θ 62  has the same potential as the fixing portion θ 12 . Further, the moving portions GND 55  and GND 65  have the same potential as the fixing portions GND 35  and GND 45 . When the same voltage is applied to the moving portions θ 51  and θ 61 , the third movable portion  713 AF moves to one side in the θz direction (for example, clockwise), and when the same voltage is applied to the moving portions θ 52  and θ 62 , the third movable portion  713 AF moves to the other side in the θz direction (for example, counterclockwise). 
     By applying a voltage to the predetermined fixing portions and/or moving portions as described above, the first movable portions  713 AA to  713 AD and the second movable portion  713 AE translate in the X direction and/or the Y direction, and the third movable portion  713 AF rotates in the θz direction. Therefore, the third movable portion  713 AF moves in the X direction, the Y direction and/or the θz direction. The stage portion  711 A moves in the X direction, the Y direction and/or the θz direction in accordance with the movements of the third movable portion  713 AF, and the main part  731 A of the flexible wiring body  73 A moves in the X direction, the Y direction and/or the θz direction in accordance with the movements of the stage portion  711 A. The plurality of arm parts  732 A of the flexible wiring body  73 A are easily deformed in accordance with the movements of the main part  731 A and follow the movements of the main part  731 A. 
     A method of forming the actuator  71 A is not particularly limited, and the actuator  71 A can be formed by, for example, using a substrate such as an SOI in which silicon single crystals are formed on both sides of an oxide film, and performing etching such as deep reactive ion etching (DRIE) on a handle layer and an active layer. The insulating portions in the actuator  71 A may be formed by combining DRIE, LPCVD, polishing, and the like. 
     The driving system  7  may include at least one displacement sensor for measuring displacement of at least one of the movable portions and the plurality of springs. For example, in order to measure displacement of the third movable portion  713 AF, the driving system  7  may use a driving comb electrode, or may further include another displacement sensor. By inputting a signal from the displacement sensor to a control unit (not shown) and controlling driving of the actuator  71 A based on the signal, it is possible to achieve highly accurate position control of the semiconductor element  6 . 
     As described above, according to the present embodiment, the flexible wiring body  73 A includes the main part  731 A mounted with the semiconductor element  6  and electrically connected to the semiconductor element  6 , and the plurality of arm parts  732 A extending from the main part  731 A toward the frame  72  and bent three-dimensionally. Therefore, the main surfaces  732   a  of the plurality of arm parts  732 A formed integrally with the main part  731 A are not parallel to the main surface  731   a  of the main part  731 A, the plurality of arm parts  732 A are easily and sufficiently bent in an out-of-plane direction with respect to the translation (X direction and/or Y direction) or the rotation (θz direction) of the main part  731 A fixed to the stage portion  711 A, and the movements of the actuator  71 A are less likely to be inhibited. As a result, positioning performance of the semiconductor element  6  mounted on the main part  731 A can be improved. In addition, since the conductive wires for communication and the conductive wires for power are provided on the arm parts  732 A, both of the high-frequency signal for high-speed communication and the large current for driving the image sensor can flow stably. Further, since the flexible wiring body  73 A can be formed by performing a simple bending process on the flexible wiring body  73 A in a developed state, it is possible to cope with large-scale production without requiring a complicated assembly process. 
     Further, in the plan view of the main part  731 A, the plurality of arm parts  732 A are disposed symmetrically with respect to the main part  731 A, and the plurality of arm parts  732 A are bent by folding back to maintain the state where the forces due to elastic deformation are balanced. Therefore, a resistance force due to rigidity of the flexible wiring body  73 A is reduced, and thus the movements of the actuator  71 A is less likely to be inhibited and the movement of the semiconductor element  6  with high accuracy can be achieved even when the actuator  71 A is formed by a MEMS or the like and the generated force is small. 
     Further, in the arm part  732 A, the first portion  732 Aa having the main surface  732   a  substantially perpendicular to the main surface  731   a  of the main part  731 A, the second portion  732 Ab provided at one end of the first portion  732 Aa and bent by folding back, and the third portion  732 Ac facing the first portion  732 Aa are disposed substantially perpendicular to the main surface  731   a  of the main part  731 A, so that the plurality of arm parts  732 A can reliably follow the translation (in X direction and/or Y direction) and the rotation (in θz direction) of the main part  731 A fixed to the stage portion  711 A, the positioning performance of the semiconductor element  6  mounted on the main part  731 A can be further improved, and connection reliability can be improved. 
     In addition, according to the present embodiment, the actuator  71 A is formed with the plurality of insulating portions  715 AA to  715 AF and  716 AA to  716 AF, and is provided with a driving mechanism and a circuit for performing the translation in the X direction, a driving mechanism and a circuit for performing the translation in the Y direction, and a driving mechanism and a circuit for performing the rotation in the ez direction, which are electrically independent of one another. Therefore, free movement in the X direction, the Y direction and/or the θz direction can be achieved. Since the driving circuits of the actuator  71 A are connected to a circuit (not shown) of the substrate  8 , a wire of the actuator  71 A and a wire of the semiconductor element  6  (conductive layer of the flexible wiring body  73 A) can be separately formed above and below the stage portion  711 A, and physical interference between these wires can be reliably prevented. Further, by flip-chip connecting the plurality of bases  712 A of the actuator  71 A to the substrate  8 , it is possible to protect a fine portion of the movable portion  713 A of the actuator  71 A. 
     (a) of  FIG.  6    is a plan view showing a modification of the driving system  7  in (a) of  FIG.  2   , (b) of  FIG.  6    is a cross-sectional view taken along a line III-III′ in (a) of  FIG.  6   , and  FIG.  7    is a partially enlarged cross-sectional view of (b) of  FIG.  6   . The configuration of the driving system in (a) of  FIG.  6    is mainly different from that of the driving system  7  in (a) of  FIG.  2    in that the driving system does not include the stage portion  711 A and the actuator  71 A is directly connected to the flexible wiring body  73 A via an adhesive layer  80 A. The same constituent elements as those of the driving system  7  in (a) of  FIG.  2    are denoted by the same reference numerals, and the description thereof will be omitted. 
     The flexible wiring body  73 A in (a) of  FIG.  6    has the same configuration as the flexible wiring body  73 A in (a) of  FIG.  2    in the developed state, and has a configuration different from that of the flexible wiring body  73 A in (a) of  FIG.  2    in a state where the three-dimensional structure is formed by processing. As shown in (b) of  FIG.  6   , the flexible wiring body  73 A is defined by the main part  731 A and the arm parts  732 A, and has an accommodation portion  81 A in which the semiconductor element  6  is accommodated. As shown in  FIG.  7   , the main part  731 A is fixed to a lower surface  6   a  of the semiconductor element  6  via an adhesive layer  82 A. The first portion  732 Aa of the arm part  732 A is fixed to a side surface  6   b  of the semiconductor element  6  via an adhesive layer  83 A ( FIG.  7   ). In addition, the end portion  734 Aa of the conductive layers  734 A is electrically connected to the semiconductor element  6  via a joint portion  84 A formed by ultrasonic connection, thermocompression bonding, connection using a conductive adhesive material, or the like, and the other end portion  734 Ab is electrically connected to the connector terminal (not shown). 
       FIG.  8    is a developed view of the flexible wiring body  73 A in (a) of  FIG.  6   . In the present modification, a three-dimensional structure as shown in (a) and (b) of  FIG.  6    is formed by folding the flexible wiring body  73 A as a mountain fold along lines L 2 , L 2  in  FIG.  8    and bending intermediate portions of the four arm parts  732 A by folding back. 
     As described above, according to the present modification, the flexible wiring body  73 A can also be applied to the driving system  7  without the stage portion  711 A. That is, the flexible wiring body  73 A includes the main part  731 A mounted with the semiconductor element  6  and electrically connected to the semiconductor element  6 , and the plurality of arm parts  732 A extending from the main part  731 A toward the frame  72  and bent three-dimensionally. Therefore, the main surfaces  732   a  of the plurality of arm parts  732 A formed integrally with the main part  731 A are not parallel to the main surface  731   a  of the main part  731 A, the plurality of arm parts  732 A are easily and sufficiently bent in an out-of-plane direction with respect to the translation (the X direction and/or the Y direction) or the rotation (the ez direction) of the main part  731 A fixed to the stage portion  711 A, and the movements of the actuator  71 A are less likely to be inhibited. As a result, the positioning performance of the semiconductor element  6  mounted on the main part  731 A can be improved. Since the semiconductor element  6  and the flexible wiring body  73 A are electrically connected by providing the joint portion  84 A without providing the wire portion, it is possible to contribute to a reduction in height of the combined configuration of the semiconductor element  6  and the driving system  7 . 
       FIG.  9    is a plan view showing another modification of the flexible wiring body in  FIG.  4   . (a) of  FIG.  10    is a partial plan view showing a state where the flexible wiring body of  FIG.  9    is mounted on the actuator, and (b) of  FIG.  10    is a partial cross-sectional view of (a) of  FIG.  10   . The configuration of the flexible wiring body of  FIG.  9    is different from that of the flexible wiring body of  FIG.  4    in the shape of the arm part. 
     As shown in  FIG.  9   , a flexible wiring body  73 B includes a main part  731 B mounted with the semiconductor element  6  and electrically connected to the semiconductor element  6 , and a plurality of arm parts  732 B extending from the main part  731 B toward the frame  72  (see (a) and (b) of  FIG.  2   ) and bent three-dimensionally. 
     As shown in (a) and (b) of  FIG.  10   , each arm part  732 B includes a first portion  732 Ba having a main surface  732   c  substantially perpendicular to a main surface  731   b  of the main part  731 B, a second portion  732 Bb provided at one end of the first portion  732 Ba and bent by folding back, a third portion  732 Bc facing the first portion  732 Ba, and a fourth portion  732 Bd provided at one end of the third portion  732 Bc and having main surface  732   d  substantially parallel to the main surface  731   b  of the main part  731 B. The first portion  732 Ba, the second portion  732 Bb, and the third portion  732 Bc are disposed substantially perpendicular to the main surface  731   b  of the main part  731 B ((b) of  FIG.  10   ). 
     The fourth portion  732 Bd includes an extension portion  732 Bda disposed perpendicular to the third portion  732 Bc and an extension portion  732 Bdb disposed perpendicular to the extension portion  732 Bda ( FIG.  9   ). In a state where the flexible wiring body  73 B is mounted on the actuator  71 A ((a) of  FIG.  10   ), the extension portion  732 Bda extends in a direction away from the main part  731 B (X direction) in the plan view, and the extension portion  732 Bdb extends from the extension portion  732 Bda in the horizontal direction (Y direction). The two extension portions  732 Bdb provided in the two adjacent arm parts  732 B extend in the horizontal direction (Y direction) and extend in directions away from each other. Further, in the present modification, the fourth portion  732 Bd is provided on a plane different from the main part  731 B, and is disposed below the main part  731 B. 
     In the present modification, the other end portion  734 Bb of a conductive layer  734 B is provided at the extension portion  732 Bdb, one end portion  734 Ba of the conductive layer  734 B is electrically connected to the semiconductor element  6 , and the other end portion  734 Bb is electrically connected to a connector terminal (not shown). In a state where the flexible wiring body  73 B is bent three-dimensionally, the other end portion  734 Bb of the conductive layer  734 B is disposed on a lower side (back side) of a resin layer  733 B with respect to the Z direction ((b) of  FIG.  10   ). 
     The arm part  732 B may have a fifth portion  732 Be serving as a margin portion at the time of bending between the main part  731 B and the first portion  732 Ba ( FIG.  9   ). A dimension in a width direction (Y direction) of the fifth portion  732 Be is preferably smaller than a dimension in a width direction of the main part  731 B. Accordingly, the first portion  732 Ba can be easily formed by bending process, buckling of the conductive layer  734 B at a bent portion can be prevented, and electrical connection reliability of the conductive layer  734 B can be further improved. 
     According to the present modification, since the fourth portion  732 Bd includes the extension portion  732 Bda disposed perpendicular to the third portion  732 Bc and the extension portion  732 Bdb disposed perpendicular to the extension portion  732 Bda, it is possible to improve flexibility in designing the fourth portion  732 Bd to be inserted into the connector terminal. 
       FIG.  11    is a plan view showing another modification of the flexible wiring body in  FIG.  4   . (a) of  FIG.  12    is a partial plan view showing a state where the flexible wiring body of  FIG.  11    is mounted on the actuator, and (b) of  FIG.  12    is a partial cross-sectional view of (a) of  FIG.  12   . 
     As shown in  FIG.  11   , a flexible wiring body  73 C includes a main part  731 C mounted with the semiconductor element  6  and electrically connected to the semiconductor element  6 , and a plurality of arm parts  732 C extending from the main part  731 C toward the frame  72  (see (a) and (b) of  FIG.  2   ) and bent three-dimensionally. 
     As shown in (a) and (b) of  FIG.  12   , each arm part  732 C includes a first portion  732 Ca having a main surface  732 e substantially perpendicular to a main surface  731   c  of the main part  731 C, a second portion  732 Cb provided at one end of the first portion  732 Ca and bent by folding back, a third portion  732 Cc facing the first portion  732 Ca, and a fourth portion  732 Cd provided at one end of the third portion  732 Cc and having a main surface  732   f  substantially parallel to the main surface  731   c  of the main part  731 C. The first portion  732 Ca, the second portion  732 Cb and the third portion  732 Cc are disposed substantially perpendicular to the main surface  731   c  of the main part  731 C ((b) of  FIG.  10   ). 
     The fourth portion  732 Cd includes an extension portion  732 Cda disposed perpendicular to the third portion  732 Cc and an extension portion  732 Cdb disposed perpendicular to the extension portion  732 Cda ( FIG.  11   ). In a state where the flexible wiring body  73 C is mounted on the actuator  71 A ((a) of  FIG.  12   ), the extension portion  732 Cda extends in a direction away from the main part  731 C (X direction) in the plan view, and the extension portion  732 Cdb extends from the extension portion  732 Cda in the horizontal direction (Y direction). The two extension portions  732 Cdb provided in the two adjacent arm parts  732 C extend in the horizontal direction (Y direction) and extend in directions away from each other. In the present modification, the fourth portion  732 Cd is provided on the same plane as the main part  731 C. 
     In the present modification, the other end portion  734 Cb of a conductive layer  734 C is provided at the extension portion  732 Cdb, one end portion  734 Ca of the conductive layer  734 C is electrically connected to the semiconductor element  6 , and the other end portion  734 Cb is electrically connected to a connector terminal (not shown). In a state where the flexible wiring body  73 C is bent three-dimensionally, the other end portion  734 Cb of the conductive layer  734 C is disposed on an upper side (front side) of a resin layer  733 C with respect to the Z direction ((b) of  FIG.  12   ). 
     According to the present modification, since the fourth portion  732 Cd includes the extension portion  732 Cda disposed perpendicular to the third portion  732 Cc and the extension portion  732 Cdb disposed perpendicular to the extension portion  732 Cda, it is possible to improve flexibility in designing the fourth portion  732 Cd to be inserted into the connector terminal in the same manner as the fourth portion  732 Bd of the flexible wiring body  73 B. 
       FIG.  13    is a bottom view showing a modification of the actuator  71 A of  FIG.  5   . 
     As shown in  FIG.  13   , an actuator  71 B includes a plurality of bases  712 B fixed to the substrate  8  (see (b) of  FIG.  2   ), a movable portion  713 B mounted with the main part  731 A of the flexible wiring body  73 A and the semiconductor element  6 , and a plurality of springs  714 B connecting the bases  712 B and the movable portion  713 B. Similar to the actuator  71 A, the actuator  71 B is formed by, for example, MEMS. 
     The plurality of bases  712 B include fixing portions X 31 , X 32 , GND 51 , and GND 51  disposed on one end side of the actuator  71 B with respect to the X direction, and fixing portions X 41 , X 42 , GND 51 , and GND 51  disposed on the other end side of the actuator  71 B with respect to the X direction. The fixing portions X 31  and X 32  are connected to the substrate  8  via an extraction electrode (not shown) (see (b) of  FIG.  5   ). Since the other fixing portions have the same configuration, the description thereof will be omitted. 
     The two fixing portions X 31  and X 32  are formed with comb teeth of one side of a comb electrode, and comb teeth of the other side are formed in a first movable portion  713 BA to be described later. The two fixing portions GND 51  and GND 51  are each connected to the first movable portion  713 BA to be described later via first springs  714 BA. Further, the two fixing portions X 41 , X 42  are each formed with comb teeth of one side of a comb electrode, and comb teeth of the other side are formed in a first movable portion  713 BB to be described later. The two fixing portions GND 51  and GND 51  are each connected to the first movable portion  713 BB to be described later via first springs  714 BA. 
     In addition, the plurality of bases  712 B include fixing portions Y 31 , Y 32 , GND 51  and GND 51  disposed on one end side of the actuator  71 B with respect to the Y direction, and fixing portions Y 41 , Y 42 , GND 51 , and GND 51  disposed on the other end side of the actuator  71 B with respect to the Y direction. 
     The two fixing portions Y 31  and Y 32  are formed with comb teeth of one side of a comb electrode, and comb teeth of the other side are formed in a first movable portion  713 BC to be described later. The two fixing portions GND 51  and GND 51  are each connected to the first movable portion  713 BC to be described later via first springs  714 BA. The two fixing portions Y 41  and Y 42  are each formed with comb teeth of one side of a comb electrode, and comb teeth of the other side are formed in a first movable portion  713 BD to be described later. The two fixing portions GND 51  and GND 51  are each connected to the first movable portion  713 BD to be described later via first springs  714 BA. 
     The movable portion  713 B includes the four first movable portions  713 BA,  713 BB,  713 BC, and  713 BD disposed at four sides (XY directions) of a second movable portion to be described later, and a second movable portion  713 BE disposed in a center of the four first movable portions  713 BA to  713 BD, connected to the four first movable portions  713 BA to  713 BD via a plurality of second springs  714 BB, and having a substantially windmill shape in the plan view. 
     The first movable portions  713 BA,  713 BB,  713 BC and  713 BD are, for example, frames having a substantially double cross shape in the plan view. The fixing portions GND 51  and GND 51  are disposed on both sides of the first movable portion  713 BA in the Y direction, and the fixing portions X 31  and X 32  are disposed on an inner side of the first movable portion  713 BA. Similarly, the fixing portions GND 51  and GND 51  are disposed on both sides of the first movable portion  713 BB in the Y direction, and the fixing portions X 41  and X 42  are disposed on an inner side of the first movable portion  713 BB. 
     Further, the fixing portions GND 51  and GND 51  are disposed on both sides of the first movable portion  713 BC in the X direction, and the fixing portions Y 31  and Y 32  are disposed on an inner side of the first movable portion  713 BC. The fixing portions GND 51  and GND 51  are disposed on both sides of the first movable portion  713 BD in the X direction, and the fixing portions Y 41  and Y 42  are disposed on an inner side of the first movable portion  713 BD. 
     The plurality of fixing portions GND 51  are respectively connected to the first movable portions  713 BA to  713 BD via the first springs  714 BA. In addition, the plurality of first springs  714 BA also function as an electrical connection portion in addition to functioning as a mechanical connection portion. 
     In the present modification, by applying an optional voltage to the fixing portions X 31 , X 32 , X 41 , X 42 , Y 31 , Y 32 , Y 41 , and Y 42 , the first movable portions  713 BA,  713 BB,  713 BC, and  713 BD move independently, and the second movable portion  713 BE moves in the X, Y, and ez directions. For example, when the same voltage is applied to the fixing portions X 32  and X 41 , the first movable portions  713 BA and  713 BB equally move in the X direction (rightward), and the second movable portion  713 BE moves in the +X direction (rightward). When the same voltage is applied to the fixing portions X 32 , X 42 , Y 32 , and Y 42 , the first movable portions  713 BA,  713 BB,  713 BC, and  713 BD equally move toward the center, and the second movable portion  713 BE rotates in the eθz direction (clockwise). 
     The second movable portion  713 BE is connected to the four first movable portions  713 BA,  713 BB,  713 BC, and  713 BD via the eight second springs  714 BB. One end side of the second movable portion  713 BE in the X direction is provided with two of the second springs  714 BB, and the other end side thereof is also provided with two of the second springs  714 BB. Further, one end side of the second movable portion  713 BE in the Y direction is provided with two of the second springs  714 BB, and the other end side thereof is also provided with two of the second springs  714 BB. By appropriately designing the second springs  714 BB, the first movable portions  713 BA and  713 BB can move only in the X direction, and the first movable portions  713 BC and  713 BD can move only in the Y direction. The second movable portion  713 BE is fixed to the stage portion  711 A via the adhesive layer  78 A (see (b) of  FIG.  2   ). 
     According to the present modification, the driving mechanism and the circuit for performing the translation in the X direction and the driving mechanism and the circuit for performing the translation in the Y direction are provided independently, and the rotation in the θz direction is also performed by controlling the translation in the X direction and the translation in the Y direction, so that the movements of the second movable portion  713 BE in the X direction, the Y direction and/or the ez direction can be achieved. 
       FIG.  14    is a bottom view showing another modification of the actuator  71 A of  FIG.  5   . 
     As shown in  FIG.  14   , an actuator  71 C includes a plurality of bases  712 C fixed to the substrate  8  (see (b) of  FIG.  2   ), a movable portion  713 C mounted with the main part  731 A of the flexible wiring body  73 A and the semiconductor element  6 , and a plurality of springs  714 C connecting the bases  712 C and the movable portion  713 C. Similar to the actuator  71 A, the actuator  71 C is formed by, for example, MEMS. 
     The plurality of bases  712 C include fixing portions X 51 , X 52 , GND 61 , X 61 , X 62 , and GND 61  disposed on one end side of the actuator  71 C with respect to the X direction, and fixing portions X 71 , X 72 , GND 61 , X 81 , X 82 , and GND 61  disposed on the other end side of the actuator  71 C with respect to the X direction. The fixing portions X 51  and X 52  are connected to the substrate  8  via an extraction electrode (not shown) (see (b) of  FIG.  5   ). Since the other fixing portions have the same configuration, the description thereof will be omitted. 
     The two fixing portions X 51  and X 52  are formed with comb teeth of one side of a comb electrode, and comb teeth of the other side are formed in a first movable portion  713 CAA to be described later. Similarly, the two fixing portions X 61  and X 62  are formed with comb teeth of one side of a comb electrode, and comb teeth of the other side are formed in a first movable portion  713 CAB to be described later. The two fixing portions GND 61  and GND 61  are respectively connected to the first movable portion  713 CAA and the first movable portion  713 CAB to be described later via two first springs  714 CA. 
     Further, the two fixing portions X 71  and X 72  are formed with comb teeth of one side of a comb electrode, and comb teeth of the other side are formed in a first movable portion  713 CBA to be described later. Similarly, the two fixing portions X 81  and X 82  are formed with comb teeth of one side of a comb electrode, and comb teeth of the other side are formed in a first movable portion  713 CBB to be described later. The two fixing portions GND 61  and GND 61  are respectively connected to the first movable portion  713 CBA and the first movable portion  713 CBB to be described later via two first springs  714 CA. 
     The plurality of bases  712 C include fixing portions Y 51 , Y 52 , GND 61 , Y 61 , Y 62 , and GND 61  disposed on one end side of the actuator  71 C with respect to the Y direction, and fixing portions Y 71 , Y 72 , GND 61 , Y 81 , Y 82 , and GND 61  disposed on the other end side of the actuator  71 C with respect to the Y direction. 
     The two fixing portions Y 51  and Y 52  are formed with comb teeth of one side of a comb electrode, and comb teeth of the other side are formed in a first movable portion  713 CCA to be described later. Similarly, the two fixing portions Y 61  and Y 62  are formed with comb teeth of one side of a comb electrode, and comb teeth of the other side are formed in a first movable portion  713 CCB to be described later. The two fixing portions GND 61  and GND 61  are respectively connected to the first movable portion  713 CCA and the first movable portion  713 CCB to be described later via two first springs  714 CA. 
     Further, the two fixing portions Y 71  and Y 72  are formed with comb teeth of one side of a comb electrode, and comb teeth of the other side are formed in a first movable portion  713 CDA to be described later. Similarly, the two fixing portions Y 81  and Y 82  are formed with comb teeth of one side of a comb electrode, and comb teeth of the other side are formed in a first movable portion  713 CDB to be described later. The two fixing portions GND 61  and GND 61  are respectively connected to the first movable portion  713 CDA and the first movable portion  713 CDB to be described later via two first springs  714 CA. 
     The movable portion  713 C includes the eight first movable portions  713 CAA,  713 CAB,  713 CBA,  713 CBB,  713 CCA,  713 CCB,  713 CDA and  713 CDB disposed at four sides (XY directions) of a second movable portion to be described later, and a second movable portion  713 CE disposed in a center of the eight first movable portions  713 CAA to  713 CDB, connected to the eight first movable portions  713 CAA to  713 CDB via a plurality of second springs  714 CB, and having a substantially rectangular plate in the plan view. 
     The first movable portions  713 CAA,  713 CAB,  713 CBA,  713 CBB,  713 CCA,  713 CCB,  713 CDA and  713 CDB are, for example, frames having a substantially rectangular shape in the plan view. The fixing portion X 51  is disposed on a side opposite to the second movable portion  713 CE of the first movable portion  713 CAA with respect to the X direction, and the fixing portions X 52  and GND 61  are disposed on an inner side of the first movable portion  713 CAA. The fixing portion X 61  is disposed on a side opposite to the second movable portion  713 CE of the first movable portion  713 CAB with respect to the X direction, and the fixing portions X 52  and GND 61  are disposed on an inner side of the first movable portion  713 CAB. 
     Further, the fixing portion X 71  is disposed on a side opposite to the second movable portion  713 CE of the first movable portion  713 CBA with respect to the X direction, and the fixing portions X 72  and GND 61  are disposed on an inner side of the first movable portion  713 CBA. The fixing portion X 81  is disposed on a side opposite to the second movable portion  713 CE of the first movable portion  713 CBB with respect to the X direction, and the fixing portions X 82  and GND 61  are disposed on an inner side of the first movable portion  713 CBB. 
     Similarly, the fixing portion Y 52  is disposed on a side opposite to the second movable portion  713 CE of the first movable portion  713 CCA with respect to the Y direction, and the fixing portions Y 51  and GND 61  are disposed on an inner side of the first movable portion  713 CCA. In addition, the fixing portion X 62  is disposed on a side opposite to the second movable portion  713 CE of the first movable portion  713 CCB with respect to the Y direction, and the fixing portions Y 61  and GND 61  are disposed on an inner side of the first movable portion  713 CCB. 
     In addition, the fixing portion Y 72  is disposed on a side opposite to the second movable portion  713 CE of the first movable portion  713 CDA with respect to the Y direction, and the fixing portions Y 71  and GND 61  are disposed on an inner side of the first movable portion  713 CDA. In addition, the fixing portion Y 82  is disposed on a side opposite to the second movable portion  713 CE of the first movable portion  713 CDB with respect to the Y direction, and the fixing portions Y 81  and GND 61  are disposed on an inner side of the first movable portion  713 CDB. 
     The plurality of fixing portions GND 61  are respectively connected to the first movable portions  713 CAA to  713 CDB via the first springs  714 CA. In addition, the plurality of first springs  714 CA also function as an electrical connection portion in addition to functioning as a mechanical connection portion. 
     In the present modification, when a voltage is applied to the fixing portions X 52 , X 62 , X 71 , and X 81 , the first movable portions  713 CAA,  713 CAB,  713 CBA and  713 CBB move in one side in the X direction (for example, +X direction), and when a voltage is applied to the fixing portions X 51 , X 61 , X 72 , and X 82 , the first movable portions  713 CAA,  713 CAB,  713 CBA and  713 CBB move in the other side in the X direction (for example, −X direction). On the other hand, when a voltage is applied to the fixing portions Y 52 , Y 62 , Y 71 , and Y 81 , the first movable portions  713 BC,  713 BD move in one side in the Y direction (for example, +Y direction), and when a voltage is applied to the fixing portions Y 51 , Y 61 , Y 72 , and Y 82 , the first movable portions  713 BC,  713 BD move in the other side in the Y direction (for example, −Y direction). 
     The second movable portion  713 CE is connected to the eight first movable portions  713 CAA,  713 CAB,  713 CBA,  713 CBB,  713 CCA,  713 CCB,  713 CDA, and  713 CDB via the eight second springs  714 CB. One end side of the second movable portion  713 CE in the X direction is provided with two of the second springs  714 CB, and the other end side thereof is also provided with two of the second springs  714 CB. Further, one end side of the second movable portion  713 BE in the Y direction is provided with two of the second springs  714 CB, and the other end side thereof is also provided with two of the second springs  714 CB. The second movable portion  713 CE is fixed to the stage portion  711 A via the adhesive layer  78 A (see (b) of  FIG.  2   ). 
     In the present modification, the second movable portion  713 CE has the same potential as the fixing portion GND 61 . For example, when a voltage is applied to one of the fixing portions X 52 , X 62 , X 71 , X 81  and the fixing portions X 51 , X 61 , X 72 , X 82  and one of the fixing portions Y 52 , Y 62 , Y 71 , Y 81  and the fixing portions Y 51 , Y 61 , Y 72 , Y 82 , the first movable portions  713 CAA,  713 CAB,  713 CBA, and  713 CBB move in one side of the X direction (for example, +X direction), and the first movable portions  713 CCA,  713 CCB,  713 CDA, and  713 CDB move in one side of the Y direction (for example, +Y direction). Further, along with the movements of the first movable portions  713 CAA to  713 CDB, the second movable portion  713 CE moves in the X, Y, and θz directions. For example, when the same voltage is applied to the fixing portions X 52 , X 62 , X 71 , and X 81 , the first movable portions  713 CAA,  713 CAB,  713 CBA, and  713 CBB equally move in the +X direction (rightward), and the second movable portion  713 CE moves in the +X direction (rightward). Further, when the same voltage is applied to the fixing portions X 52 , X 61 , X 71 , X 82 , Y 52 , Y 61 , Y 71 , and Y 82 , the first movable portions  713 CAA and  713 CBA move in the +X direction, the first movable portions  713 CAB and  713 CBB move in the −X direction, the first movable portions  713 CCA and  713 CDA move in the +Y direction (upward), the first movable portions  713 CBB and  713 CDB move in the −Y direction, and the second movable portion  713 CE moves in the ez direction (clockwise). 
     By selectively applying a voltage to the predetermined fixing portions as described above, the first movable portions  713 CAA to  713 CDB translate in the X direction and/or the Y direction, and the second movable portion  713 BE moves in the X, Y, and ez directions. 
     According to the present modification, the driving mechanism and the circuit for performing the translation in the X direction and the driving mechanism and the circuit for performing the translation in the Y direction are provided independently, and the rotation in the θz direction is also performed by controlling the translation in the X direction and the translation in the Y direction. Therefore, the movements of the second movable portion  713 CE in the X direction, the Y direction and/or the ez direction can be achieved. 
       FIG.  15    is a cross-sectional view showing a modification of the actuator  71 A in (b) of  FIG.  2   . The present modification differs from the actuator  71 A in that the actuator is an electromagnetic actuator. 
     As shown in  FIG.  15   , an actuator  71 D includes a MEMS  711 D mounted to the substrate  8 , and a plurality of coils  712 D provided in the substrate  8  and electrically connected to an external circuit (not shown). The MEMS  711 D includes bases  711 DA supported by the substrate  8 , movable portions  711 DB fixed to the main part  731 A of the flexible wiring body  73 A and the semiconductor element  6 , a plurality of springs  711 DC connecting the bases  711 DA and the movable portions  711 DB, and a plurality of magnetic bodies  711 DD mounted to the movable portions  711 DB. 
     The plurality of coils  712 D are disposed at positions immediately below the MEMS  711 D and corresponding to the plurality of magnetic bodies  711 DD, and are embedded in the substrate  8  such as a printed circuit board or a ceramic substrate. Configurations of the bases  711 DA, the movable portions  711 DB, and the plurality of springs  711 DC of the MEMS  711 D are basically the same as the configurations of the bases, the movable portions, and the plurality of springs of the actuator described above, and thus the description thereof will be omitted. 
     The magnetic bodies  711 DD are formed using, for example, a magnetic powder such as neodymium magnet, and are embedded in the movable portions  711 DB. The magnetic bodies  711 DD can be obtained, for example, by forming a hole in a substrate such as an SOI by DRIE, and fixing a magnetic powder to the hole by film deposition in a state where the hole is filled with the magnetic powder. The magnetic powder is bonded together by the deposited film, and the deposited film is made of, for example, alumina (Al 2 O 3 ), and is formed by atomic layer deposition (ALD). Alternatively, the magnetic powder is bonded together by a resin binder. Further, instead of embedding the magnetic powder, a magnetic body (for example, CoPt) may be formed in the hole by plating. Accordingly, a thickness of the magnetic bodies  711 DD with respect to a thickness of the substrate such as an SOI can be increased, and the magnetic bodies  711 DD having a high magnetic force can be formed in the movable portions  711 DB. 
     The actuator  71 D may include at least one displacement sensor that measures the displacement of at least one of the movable portions  711 DB and the plurality of springs  711 DC. For example, a displacement sensor and a circuit thereof can be formed in the MEMS  711 D. 
     According to the present modification, the actuator  71 D, which is an electromagnetic actuator, can be used to move the movable portions  711 DB in the X direction, the Y direction, and/or the θz direction, and as in the case of the electrostatic actuator, it is possible to achieve the movement of the semiconductor element  6  with high accuracy. 
     The embodiments of the invention have been described above, but the invention is not limited to the above embodiments, and various modifications and changes can be made within the scope of the gist of the invention recited in the claims. 
     For example, in the present embodiment, the actuator  71 A performs the translations in the X direction and the Y direction and the rotation about the axis in the Z direction (θz direction) among the XYZ directions orthogonal to one another, but the invention is not limited thereto, and the actuator  71 A may perform at least one of the translations in the X direction, the Y direction, and the Z direction among the XYZ directions orthogonal to one another, the rotation about the axis in the X direction (θx direction), the rotation about the axis in the Y direction (ey direction), and the rotation about the axis in the Z direction (θz direction). When the flexible wiring body having the same configuration as above is used for such an actuator, the plurality of arm parts can also follow at least one of the translations in three directions orthogonal to one another and the rotations around the axes in the three directions, the positioning performance of the semiconductor element mounted on the main part can be improved, and both the high-frequency signal for high-speed communication and the large current for driving the imaging element can flow stably. 
     REFERENCE SIGN LIST 
       1  imaging device 
       2  lens 
       3  AF unit 
       4  glass member 
       5  cover member 
       6  semiconductor element 
       6   a  lower surface 
       6   b  side surface 
       7  driving system 
       8  substrate 
       71 A actuator 
       71 B actuator 
       71 C actuator 
       71 D actuator 
       72   a  frame 
       72   a  upper surface 
       73 A flexible wiring body 
       73 B flexible wiring body 
       73 C flexible wiring body 
       74 A adhesive layer 
       75 A adhesive layer 
       76 A adhesive layer 
       77  wire portion 
       78 A adhesive layer 
       79 A extraction electrode 
       80 A adhesive layer 
       81 A accommodation portion 
       82 A adhesive layer 
       83 A adhesive layer 
       84 A joint portion 
       711   a  upper surface 
       711 A stage portion 
       711   b  side surface 
       711 DA base 
       711 DB movable portion 
       711 DC spring 
       711 DD magnetic body 
       712 A base 
       712 B base 
       712 C base 
       712 D coil 
       713 A movable portion 
       713 AA first movable portion 
       713 AB first movable portion 
       713 AC first movable portion 
       713 AD first movable portion 
       713 AE second movable portion 
       713 AF third movable portion 
       713 B movable portion 
       713 BA first movable portion 
       713 BB first movable portion 
       713 BC first movable portion 
       713 BD first movable portion 
       713 BE second movable portion 
       713 C movable portion 
       713 CAA first movable portion 
       713 CAB first movable portion 
       713 CBA first movable portion 
       713 CBB first movable portion 
       713 CCA first movable portion 
       713 CCB first movable portion 
       713 CDA first movable portion 
       713 CDB first movable portion 
       713 CE second movable portion 
       714 A spring 
       714 AA first spring 
       714 AB second spring 
       714 AC third spring 
       714 B spring 
       714 BA first spring 
       714 BB second spring 
       714 C spring 
       714 CA first spring 
       714 CB second spring 
       715 AA insulating portion 
       715 AB insulating portion 
       715 AC insulating portion 
       715 AD insulating portion 
       715 AE insulating portion 
       715 AF insulating portion 
       715 AG insulating portion 
       715 AH insulating portion 
       716 AA insulating portion 
       716 AB insulating portion 
       716 ABa first layer 
       716 ABb second layer 
       716 AC insulating portion 
       716 AD insulating portion 
       716 AE insulating portion 
       716 AF insulating portion 
       731   a  main surface 
       731 A main part 
       731   b  main surface 
       731 B main part 
       731 C main part 
       731   c  main surface 
       732   a  main surface 
       732 A arm part 
       732 Aa first portion 
       732 Ab second portion 
       732 Ac third portion 
       732 Ad fourth portion 
       732   b  main surface 
       732 B arm part 
       732 Ba first portion 
       732 Bb second portion 
       732 Bc third portion 
       732 Bd fourth portion 
       732 Bda extension portion 
       732 Bdb extension portion 
       732 Be fifth portion 
       732   c  main surface 
       732 C arm part 
       732 Ca first portion 
       732 Cb second portion 
       732 Cc third portion 
       732 Cd fourth portion 
       732 Cda extension portion 
       732 Cdb extension portion 
       732   d  main surface 
       732   e  main surface 
       732   f  main surface 
       733 A resin layer 
       733 B resin layer 
       733 C resin layer 
       734 A conductive layer 
       734 Aa one end portion 
       734 Ab the other end portion 
       734 B conductive layer 
       734 Ba one end portion 
       734 Bb the other end portion 
       734 C conductive layer 
       734 Ca one end portion 
       734 Cb the other end portion 
     X 11 , X 12 , GND 14 , GND 15 , θ 12  fixing portion 
     X 21 , X 22 , θ 22 , GND 23 , GND 25  fixing portion 
     Y 11 , Y 12 , GND 31 , GND 35 , θ 31  fixing portion 
     Y 21 , Y 22 , θ 41 , GND 42 , GND 45  fixing portion 
     X 31 , X 32 , GND 51  fixing portion 
     X 41 , X 42 , GND 51  fixing portion 
     Y 31 , Y 32 , GND 51  fixing portion 
     Y 41 , Y 42 , GND 51  fixing portion 
     X 51 , X 52 , GND 61 , X 61 , X 62  fixing portion 
     X 71 , X 72 , GND 61 , X 81 , X 82  fixing portion 
     Y 51 , Y 52 , GND 61 , Y 61 , Y 62  fixing portion 
     Y 71 , Y 72 , GND 61 , Y 81 , Y 82  fixing portion 
     θ 51 , θ 52 , GND 55 , θ 61 , θ 62 , GND 65  moving portion