Abstract:
A sensor includes: a first chip; a second chip disposed on the first chip through an adhesive member; and a stopper. The second chip is connected to the first chip through a bonding wire. The stopper limits a displacement of the second chip when the adhesive member is deformed. The stopper is disposed around the second chip. Since the displacement of the second chip is restricted, deformation of the bonding wire between the first and the second chips is also restricted.

Description:
CROSS REFERENCE TO RELATED APPLICATION 
     This application is based on Japanese Patent Application No. 2004-266692 filed on Sep. 14, 2004, the disclosure of which is incorporated herein by reference. 
     FIELD OF THE INVENTION 
     The present invention relates to a sensor device having a stopper for limiting a displacement. 
     BACKGROUND OF THE INVENTION 
     A sensor device includes a sensor chip and a circuit chip, which are laminated through an adhesive material and connected through a bonding wire. This type of sensor device has a construction in which the sensor chip is laminated and adhered onto the circuit chip through the adhesive material, and the sensor chip and the circuit chip are connected to each other through the bonding wire. 
     For example, a structure for mounting the sensor chip onto the circuit chip through the adhesive material of a film shape is proposed as such a sensor device to reduce an output change with respect to a temperature change of the sensor chip for the purpose of a reduction in thermal stress of its joining portion. This structure is disclosed in, for example, U.S. Pat. No. 6,593,663. 
     However, in the structure of the sensor device of this kind, when the adhesive material such as the film shape adhesive material for adhering a portion between the chips has low elasticity, the rigidity of the joining portion of the sensor chip and the circuit chip is reduced, so that the sensor chip is easily greatly displaced by an impact from the exterior. 
     Therefore, the problems that the bonding wire for electrically connecting both the chips is easily deformed with respect to the deformation of this sensor chip and is disconnected in its turn, are caused. 
     In particular, in the case of a physical amount sensor of a capacity type for converting a physical amount into a capacity change by the sensor chip and detecting the physical amount, the parasitic capacity between adjacent wires, or between the wires and the chips affects sensor characteristics. 
     Therefore, the deformation of the bonding wire caused by excessively displacing the sensor chip causes a change in the above parasitic capacity as well as mechanical deformation including the disconnection of the wire. Therefore, the problem of a change in sensor chip characteristics is caused. 
     SUMMARY OF THE INVENTION 
     In view of the above-described problem, it is an object of the present invention to provide a sensor device having a stopper for limiting a displacement. 
     A sensor includes: a first chip; a second chip disposed on the first chip through an adhesive member; and a stopper. The second chip is connected to the first chip through a bonding wire. The stopper limits a displacement of the second chip when the adhesive member is deformed. The stopper is disposed around the second chip. 
     Since the displacement of the second chip is restricted, deformation of the bonding wire between the first and the second chips is also restricted. Thus, mechanical strength of the bonding wire is improved. Further, since the deformation of the bonding wire is limited, deviation of sensor characteristics caused by the deformation of the bonding wire becomes smaller. Thus, the sensor characteristics is improved. 
     Preferably, the first chip is a circuit chip, and the second chip is a sensor chip. 
     Preferably, the stopper is a bonding wire disposed on a part of the first chip, the part being disposed outside of a periphery of the second chip. More preferably, the second chip has a rectangular shape, and the bonding wire of the stopper has an inverted horseshoe arch shape, and is disposed outside of a corner of the rectangular shape of the second chip. Furthermore preferably, the bonding wire of the stopper has two ends, each of which is connected to a surface of the first chip. 
     Preferably, the stopper is a stud bump disposed on a part of the first chip, the part being disposed outside of a periphery of the second chip. More preferably, the second chip has a rectangular shape, and the stud bump of the stopper includes a pair of bumps, which are close to one another and disposed outside of a corner of the rectangular shape of the second chip. Furthermore preferably, the bumps of the stopper are disposed on a surface of the first chip. 
     Preferably, the stopper is a solder bump disposed on a part of the first chip, the part being disposed outside of a periphery of the second chip. More preferably, the second chip has a rectangular shape, and the solder bump of the stopper is disposed outside of a side of the rectangular shape of the second chip. Furthermore preferably, the solder bump is disposed on a surface of the first chip. 
     Preferably, the stopper is a resin member disposed on a part of the first chip, the part being disposed outside of a periphery of the second chip. More preferably, the second chip has a rectangular shape, and the resin member of the stopper has an elongated shape, and is disposed outside of a side of the rectangular shape of the second chip. Furthermore preferably, the resin member is disposed on a surface of the first chip. 
     Preferably, the stopper is a large wire, which connects between the first chip and the second chip, and the large wire has a diameter larger than that of the bonding wire. More preferably, the second chip has a rectangular shape, and the larger wire of the stopper is disposed on a corner of the rectangular shape of the second chip. 
     Preferably, the sensor further includes a package. The first chip is mounted on the package, and the stopper is a wire, which connects between the second chip and the package. More preferably, the second chip has a rectangular shape, and the wire of the stopper is disposed on a corner of the rectangular shape of the second chip. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description made with reference to the accompanying drawings. In the drawings: 
         FIG. 1A  is a plan view showing an angular rate sensor device according to a first embodiment of the present invention, and  FIG. 1B  is a cross sectional view showing the device in  FIG. 1A ; 
         FIG. 2  is a plan view showing a sensor chip of the device according to the first embodiment; 
         FIGS. 3A to 3C  are plan views explaining a method for manufacturing the device according to the first embodiment; 
         FIGS. 4A to 4C  are plan views explaining the method for manufacturing the device according to the first embodiment; 
         FIG. 5A  is a plan view showing an angular rate sensor device according to a second embodiment of the present invention, and  FIG. 5B  is a cross sectional view showing the device in  FIG. 5A ; 
         FIG. 6A  is a plan view showing an angular rate sensor device according to a third embodiment of the present invention, and  FIG. 6B  is a cross sectional view showing the device in  FIG. 6A ; 
         FIG. 7A  is a plan view showing an angular rate sensor device according to a fourth embodiment of the present invention, and  FIG. 7B  is a cross sectional view showing the device in  FIG. 7A ; 
         FIG. 8  is a plan view showing an angular rate sensor device according to a fifth embodiment of the present invention; and 
         FIG. 9  is a plan view showing an angular rate sensor device according to a sixth embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     First Embodiment 
       FIGS. 1A and 1B  are views showing the construction of an angular rate sensor device S 1  as a sensor device in accordance with a first embodiment mode of the present invention.  FIG. 1A  is a schematic plan view of this sensor device S 1 .  FIG. 1B  is a schematic sectional view of this sensor device S 1 .  FIG. 1A  is a view in which a structure in a state detaching a cover  140  is seen from above the sensor device of  FIG. 1B . 
     As shown in  FIGS. 1A and 1B , this sensor device S 1  mainly has a package  100 , a circuit chip  300  held in the package  100 , a sensor chip  200  laminated and adhered to the circuit chip  300  through an adhesive material  400  and detecting an angular rate, and a bonding wire  500  for connecting both the chips  200  and  300 . 
     The package  100  stores both the chips  200  and  300 , and forms a base portion for partitioning and forming a main body of the sensor device S 1 . The package  100  is arranged to attach the sensor device S 1  to a suitable place of a measuring object body. 
     In the example shown in  FIGS. 1A and 1B , for example, the package  100  is constructed as a laminating substrate in which plural ceramic layers  110  of e.g., alumina are laminated. Wiring is formed on the surface of each layer  110  and the interior of a through hole formed in each layer although this wiring is unillustrated. The sensor device S 1  and the exterior circuit can be electrically connected through this wiring. 
     The package  100  also has a concave portion  120  able to store the circuit chip  300  in its bottom portion. As shown in  FIG. 1B , the circuit chip  300  stored in this concave portion  120  is mounted and fixed onto the bottom portion of the package  100  through an adhesive  130  constructed from e.g., an unillustrated silicon system resin, etc. 
     A cover (lid)  140  constructed by a metal, resin or ceramic, etc. is attached to an opening portion of the package  100 . The interior of the package  100  is sealed by this cover  140 . Here, the cover  140  is constructed by a metal, and is joined to the package  100  by welding, brazing, etc. 
     The sensor chip  200  is laminated on the upper face of the circuit chip  300  through the adhesive material  400 . An adhesive material such as resin, etc. can be adopted as the adhesive material  400 . However, in this example, a film shape adhesive material of low elasticity is adopted from a purpose similar to that in the conventional device. Needless to say, an adhesive material of comparatively high elasticity may be also adopted. 
     For example, this film shape adhesive material  400  can be constructed by resin, etc. fulfilling an adhesive function by pressurizing and hardening this material. Concretely, for example, a silicon system, an epoxy system, a polyimide system, an acrylic system, a urethane system, a rubber system, a liquid crystal polymer, etc. are used as the film shape adhesive material  400 . 
     The sensor chip  200  is constructed as a detecting element for detecting an angular rate. For example, the sensor chip  200  provides a beam structural body having a comb teeth structure generally known with respect to a silicon substrate, etc. The sensor chip  200  can be set to detect a change in electrostatic capacity (electric signal) between a movable electrode and a fixing electrode according to the applied angular rate. 
     The detailed construction of the sensor chip  200  as the angular rate detecting element of this example will be mainly explained with reference to  FIG. 2 . 
       FIG. 2  is a view showing the schematic planar construction of the sensor chip  200  in the angular rate sensor device S 1  shown in  FIGS. 1A and 1B .  FIG. 2  is a schematic plan view seen from the lower face of a substrate  10  constituting the sensor chip  200  in  FIG. 1B . 
     This sensor chip  200  has the substrate  10  such as a semiconductor substrate, etc., and is formed by performing publicly known micro machine processing with respect to this substrate  10 . 
     For example, as the substrate  10 , it is possible to adopt a SOI (silicon-on-insulator) substrate of a rectangular shape in which a second silicon layer as a second semiconductor layer is stuck onto a first silicon layer as a first semiconductor layer through an oxide film as an insulating layer. 
     As shown in  FIG. 2 , beam structural bodies  20  to  60  partitioned by grooves are formed by performing trench etching, release etching, etc. with respect to a surface layer of this substrate  10 , e.g., the second silicon layer in the SOI substrate. 
     These beam structural bodies  20  to  60  are mainly constructed from a vibrating body  20 , respective beam portions  23 ,  40  and respective electrodes  50 ,  60 . 
     The vibrating body  20  is formed in the central portion of the substrate  10  so as to be vibrated within a face horizontal to the substrate  10 , i.e., within the paper face within  FIG. 2 . In this example, the vibrating body  20  is constructed from a first vibrating portion  21  located in the central portion and approximately formed in a rectangular shape, a second vibrating portion  22  located in the outer circumference of this first vibrating portion  21  and formed in the shape of a rectangular frame, and a driving beam portion  23  for connecting these first vibrating portion  21  and second vibrating portion  22 . 
     This vibrating body  20  is connected to an anchor portion  30  arranged in a circumferential portion of the substrate  10  through a detecting beam portion  40 . Here, the anchor portion  30  is fixed and supported in the lower portion of the surface layer forming this beam structural body  20  therein, i.e., in a support substrate portion in the substrate  10 . The vibrating body  20  is floated from this support substrate portion. 
     Here, as shown in  FIG. 2 , for example, the driving beam portion  23  can be elastically deformed substantially in only the x-direction by forming the driving beam portion  23  in a shape extending in the y-direction. For example, the detecting beam portion  40  can be elastically deformed substantially in only the y-direction by forming the detecting beam portion  40  in a shape extending in the x-direction. 
     The first vibrating portion  21  in the vibrating body  20  can be vibrated by the driving beam portion  23  in the x-direction (driving vibrating direction) within the horizontal face with respect to the substrate  10 . On the other hand, the entire vibrating body  20  can be vibrated by the detecting beam portion  40  in the y-direction (detecting vibrating direction) within the horizontal face with respect to the substrate  10 . 
     The driving electrode  50  for operating and vibrating the first vibrating portion  21  in the x-direction is arranged between the first vibrating portion  21  and the second vibrating portion  22 . Similarly to the anchor portion  30 , this driving electrode  50  is fixed to the above support substrate portion. The driving electrode  50  is arranged so as to be opposed to a comb teeth portion (comb teeth portion for driving)  21   a  projected from the first vibrating portion  21  such that their comb teeth are engaged with each other. 
     The detecting electrode  60  is arranged in the outer circumference of the second vibrating portion  22 . This detecting electrode  60  is arranged to detect an angular rate around the z-axis perpendicular to the substrate  10  on the basis of the vibration of the vibrating body  20 . Similarly to the anchor portion  30 , the detecting electrode  60  is fixed to the above support substrate portion. The detecting electrode  60  is arranged so as to be opposed to a comb teeth portion (comb teeth portion for detection)  22   a  projected from the second vibrating portion  22  such that their comb teeth are engaged with each other. 
     As shown in  FIG. 1A , plural pads  70  are arranged in a suitable place of the substrate  10  in this sensor chip  200  although the pads  70  are not illustrated in  FIG. 2 . The pad  70  is constructed by aluminum, etc. to apply voltages to the above vibrating body  20 , the driving electrode  50 , the detecting electrode  60 , etc. and take out signals. 
     In this embodiment mode, as shown in  FIG. 1A , this pad  70  is arranged in the circumferential portion of the substrate  10 . The bonding wire  500  of Au (gold), aluminum, etc. is connected to this pad  70 . This sensor chip  200  has the above-mentioned construction. 
     Here, for example, the circuit chip  300  is an IC chip, etc. in which a MOS transistor, a bipolar transistor, etc. are formed by using a publicly known semiconductor process with respect to a silicon substrate, etc. The circuit chip  300  can be set to a signal processing chip having functions for sending a voltage to the sensor chip  200  and processing an electric signal from the sensor chip  200  and outputting the electric signal to the exterior, etc. 
     As shown in  FIGS. 1A and 1B , the pad  70  of the sensor chip  200  and a pad  310  of the circuit chip  300 , and the pad  310  of the circuit chip  300  and a pad  150  of the package  100  are respectively electrically connected through the bonding wire  500  constructed by gold, aluminum, etc. 
     Thus, the sensor chip  200 , the circuit chip  300  and the package  100  are electrically connected to each other through the bonding wire  500 . The sensor chip  200  and the circuit chip  300  may not be directly connected to the bonding wire  500  as shown in  FIGS. 1A and 1B . 
     For example, the sensor chip  200  and the package  100  may be connected by the bonding wire  500 , and the package  100  and the circuit chip  300  may be also connected by the bonding wire  500 . In this case, the sensor chip  200  and the circuit chip  300  are unchangingly connected through the bonding wire  500  although the package  100  is interposed. 
     Thus, an electric signal (capacity change) from the sensor chip  200  is sent to the circuit chip  300  and is converted into a voltage signal by a C/V converting circuit, etc. arranged in the circuit chip  300 , and is outputted as an angular rate signal. 
     As shown in  FIGS. 1A and 1B , in this embodiment mode, a stopper  1  for regulating the displacement of the sensor chip  200  due to the deformation of the adhesive material  400  interposed between the chips  200  and  300  is arranged around the sensor chip  200 . 
     In this embodiment mode, the stopper  1  is a wire  1  (hereinafter called a stopper wire  1 ) constructed by a bonding wire arranged in a part located in the outer circumference of the sensor chip  200  in the circuit chip  300 . 
     Similarly to the above bonding wire  500 , this stopper wire  1  can be formed by performing the wire bonding of gold, aluminum, etc. between the pads  310  on the circuit chip  300 . 
     In this example, the film shape adhesive material  400  of low elasticity is adopted from a purpose similar to that of the conventional device. Therefore, the sensor chip  200  is easily displaced by an external impact, etc. in the planar direction on the circuit chip  300 . 
     Here, as shown in  FIG. 1B , the stopper wire  1  has a loop height higher than the thickness of the adhesive material  400 . Even when the sensor chip  200  is greatly displaced in the above planar direction, the sensor chip  200  hits against this stopper wire  1  and is stopped. 
     A manufacturing method of this sensor device S 1  having such a construction will be explained with reference to  FIGS. 3A ,  3 B,  3 C and  4 A,  4 B,  4 C.  FIGS. 3A ,  3 B,  3 C and  4 A,  4 B,  4 C are process views for explaining this manufacturing method, and are schematic plan views in which a work in each manufacturing process is seen from the same eye point as the above  FIG. 1A . 
     First, as shown in  FIG. 3A , the bottom portion of the package  100  is coated with an adhesive  130 . As shown in  FIG. 3B , a circuit chip  300  is mounted onto this adhesive  130 , and the circuit chip  300  and the package  100  are adhered by the adhesive  130 . 
     Thereafter, as shown in  FIG. 3C , the pad  150  of the package  100  and the pad  310  of the circuit chip  300  are connected by the bonding wire  500  by performing the wire bonding. 
     Next, the wire bonding is performed between the pads  310  for the stopper wire  1  arranged on the circuit chip  300  by the same wire bonding process, and these pads  310  are connected by the stopper wire  1 . 
     After this wire bonding is completed, the adhesive material  400  is mounted onto the circuit chip  300  as shown in  FIG. 4A . As shown in  FIG. 4B , the sensor chip  200  is mounted onto this adhesive material  400 . Thereafter, the adhesive material  400  is hardened so that the sensor chip  200  and the circuit chip  300  are adhered. 
     As shown in  FIG. 4C , the pad  70  of the sensor chip  200  and the pad  310  of the circuit chip  300  are connected by the bonding wire  500 . Thereafter, the cover  140  (see  FIG. 1B ) is welded and brazed to the package  100  so that the interior of the package  100  is sealed. Thus, the angular rate sensor device S 1  is completed. 
     The detecting operation of such an angular rate sensor device S 1  will be explained. With reference to  FIG. 2 , electrostatic force is generated between the comb teeth portion  21   a  of the first vibrating portion  21  and the driving electrode  50  by applying a driving signal (sine wave voltage, etc.) from the circuit chip  300  to the driving electrode  50  of the sensor chip  200  through the bonding wire  500 . Thus, the first vibrating portion  21  is operated and vibrated in the x-direction by the elastic force of the driving beam portion  23 . 
     When an angular rate Ω is applied around the z-axis on the basis of the operation and vibration of this first vibrating portion  21 , Coriolis force is applied to the first vibrating portion  21  in the y-direction and the entire vibrating body  20  is detection-vibrated by the elastic force of the detecting beam portion  40  in the y-direction. 
     Thus, the capacity between the detecting electrode  60  and the comb teeth of the comb teeth portion  22   a  for detection is changed by this detection vibration. Therefore, the magnitude of the angular rate Ω can be calculated by detecting this capacity change. 
     Concretely, when the vibrating body  20  is displaced in one direction along the y-axis direction in  FIG. 2 , the capacity changes in the detecting electrode  60  of the left-hand side and the detecting electrode  60  of the right-hand side are set to be reverse to each other in the left and right detecting electrodes  60  in  FIG. 2 . Therefore, the angular rate is calculated by converting the respective capacity changes in the left and right detecting electrodes  60  into voltages, and differentiating, amplifying and outputting both the voltage values. 
     In accordance with this embodiment mode, the sensor chip  200  is laminated and adhered onto the circuit chip  300  through the adhesive material  400 , and the sensor chip  200  and the circuit chip  300  are connected through the bonding wire  500  in the sensor device S 1 . This sensor device S 1  is characterized in that the stopper  1  for regulating the displacement of the sensor chip  200  due to the deformation of the adhesive material  400  is arranged around the sensor chip  200 . 
     In accordance with this construction, even when the sensor chip  200  is intended to be greatly displaced by the deformation of the adhesive material  400 , the displacement of the sensor chip  200  is regulated by hitting against the stopper  1 . Therefore, the deformation of the bonding wire  500  connecting the sensor chip  200  and the circuit chip  300  is also restrained. 
     Accordingly, in accordance with the sensor device S 1  of this embodiment mode, the mechanical deformation of a wire connecting portion caused by excessively displacing the sensor chip  200  and a change in sensor characteristics collaterally caused by this mechanical deformation can be restrained in the sensor device having the circuit chip  300  and the sensor chip  200  laminated through the adhesive material  400  and connected through the bonding wire  500 . 
     In particular, in this embodiment mode, it is also characterized in that the stopper  1  is the wire  1  constructed by a bonding wire arranged in a part located in the outer circumference of the sensor chip  200  in the circuit chip  300 . 
     As shown in  FIGS. 1A and 1B , the stopper wire  1  functioning as the stopper is stretched in a shape close to the sensor chip  200 . When force such as an impact, etc. is applied to the chip  200 , the displacement of the sensor chip  200  is limited by the wire  1 . 
     Thus, the deformation of the bonding wire  500  connecting the chips  200  and  300  is limited so that a change in a characteristic value of the sensor can be restrained by the above reasons. 
     No timing for forming the stopper wire  1  of this embodiment mode on the circuit chip  300  is limited to the manufacture processes shown in  FIGS. 3A ,  3 B,  3 C and  4 A,  4 B,  4 C. 
     For example, the stopper wire  1  may be also formed before the wire bonding between the sensor chip  200  and the circuit chip  300  is performed. The stopper wire  1  may be also formed in performing the wire bonding between the circuit chip  300  and the package  100 . 
     Second Embodiment 
       FIGS. 5A and 5B  are views showing the construction of an angular rate sensor device S 2  as a sensor device in accordance with a second embodiment mode of the present invention.  FIG. 5A  is a schematic plan view of this sensor device S 2 .  FIG. 5B  is a schematic sectional view of this sensor device S 2 .  FIG. 5A  is a view in which a structure with the cover  140  removed is seen from above the sensor device of  FIG. 5B . 
     In the above first embodiment mode, the stopper is formed by stretching the wire  1  on the circuit chip  300 . However, it is not necessarily indispensable that the wire  1  is stretched to obtain a similar effect by forming the stopper on the circuit chip  300 . 
     This embodiment mode provides the sensor device S 2  characterized in that the stopper is constructed by a stud bump  2  arranged in a part located in the outer circumference of the sensor chip  200  in the circuit chip  300 . 
     Concretely, as shown in  FIGS. 5A and 5B , the stud bump  2  is formed by performing preball bonding in the wire bonding of gold, etc. on the circuit chip  300 . This stud bump  2  is used as a stopper. Concretely, after the ball bonding is performed, the wire is cut so that the stud bump  2  is formed. 
     In this embodiment mode, the effect of the stopper similar to that of the first embodiment mode is obtained and the stopper  2  can be easily formed in the wire bonding process between the chips  200  and  300 . 
     This stud bump  2  is naturally higher than the thickness of the adhesive material  400 . The ball bonding may be also performed plural times to form the stud bump  2  of such a height. Namely, the stud bump  2  may be constructed by a simple layer and may be also constructed by a structure formed by laminating many layers. 
     Third Embodiment 
       FIGS. 6A and 6B  are views showing the construction of an angular rate sensor device S 3  as a sensor device in accordance with a third embodiment mode of the present invention.  FIG. 6A  is a schematic plan view of this sensor device S 3 .  FIG. 6B  is a schematic sectional view of this sensor device S 3 .  FIG. 6A  is a view in which a structure with the cover  140  removed is seen from above the sensor device of  FIG. 6B . 
     In the second embodiment mode, the stopper is constructed by the stud bump  2  arranged in the part located in the outer circumference of the sensor chip  200  in the circuit chip  300 . However, as shown in  FIGS. 6A and 6B , the sensor device S 3  of this embodiment mode is characterized in that a soldering bump  3  is used instead of the stud bump. 
     Concretely, as shown in  FIGS. 5A and 5B , an unillustrated electrode is arranged on the circuit chip  300 . The soldering bump  3  is formed on this electrode by plating solder and printing solder. The soldering bump  3  can be also formed by a method for arranging a soldering ball itself, etc. 
     In this embodiment mode, the effect of the stopper similar to that in the first embodiment mode is obtained by operating this soldering bump  3  as the stopper. 
     Fourth Embodiment 
       FIGS. 7A and 7B  are views showing the construction of an angular rate sensor device S 4  as a sensor device in accordance with a fourth embodiment mode of the present invention.  FIG. 7A  is a schematic plan view of this sensor device S 4 .  FIG. 7B  is a schematic sectional view of this sensor device S 4 .  FIG. 7A  is a view in which a structure with the cover  140  removed is seen from above the sensor device of  FIG. 7B . 
     As shown in  FIGS. 7A and 7B , this embodiment mode provides the sensor device S 4  characterized in that the stopper is constructed by a resin member  4  arranged in a part located in the outer circumference of the sensor chip  200  in the circuit chip  300 . 
     Concretely, as shown in  FIGS. 7A and 7B , resin paste, etc. are formed on the circuit chip  300  in a dam shape by an ink jet, dispensing, etc. The resin member  4  of the dam shape is formed by hardening this resin paste, etc. 
     In this embodiment mode, the effect of the stopper similar to that in the above first embodiment mode is also obtained by operating this resin member  4  as the stopper. 
     Fifth Embodiment 
       FIG. 8  is a view showing the schematic planar construction of an angular rate sensor device S 5  as a sensor device in accordance with a fifth embodiment mode of the present invention. The cover  140  is set to a detaching state. 
     As shown in  FIG. 8 , this embodiment mode provides the sensor device S 5  characterized in that the stopper is constructed by setting a partial wire  5  of the bonding wire  500  for connecting the sensor chip  200  and the circuit chip  300  to be thicker than the other wire  500 . 
     For example, the wire  5  (here called an anchor wire  5 ) as this stopper can be formed by the wire bonding after the sensor chip  200  and the circuit chip  300  are laminated and adhered, and before or after the wire bonding between the sensor chip  200  and the circuit chip  300  is performed. 
     For example, this anchor wire  5  can be easily set to be thicker than the other wire of the bonding wire  500  for connecting both the chips  200  and  300  in the embodiment mode by setting the thinner wire to a gold thin wire and setting the thicker wire to an aluminum thick wire, or changing the diameter of the wire even in the wire of the same material, etc. 
     In this embodiment mode, this anchor wire  5  acts as the stopper. Here, the displacement of the sensor chip  200  itself is regulated by the comparatively thick anchor wire  5 . Thus, in this embodiment mode, similarly to the first embodiment mode, it is also possible to restrain the mechanical deformation of a wire connecting portion caused by excessively displacing the sensor chip  200  and a change in sensor characteristics collaterally caused by this mechanical deformation. 
     Sixth Embodiment 
       FIG. 9  is a view showing the schematic planar construction of an angular rate sensor device S 6  as a sensor device in accordance with a sixth embodiment mode of the present invention. The cover  140  is set to a detaching state. 
     As shown in  FIG. 9 , this embodiment mode provides the sensor device S 6  characterized in that the circuit chip  300  is mounted and fixed onto the package  100 , and the stopper is constructed as a wire  6  for connecting the sensor chip  200  and the package  100 . 
     For example, the wire  6  as this stopper can be formed at any time point after the sensor chip  200  and the circuit chip  300  are laminated and adhered within the package  100 . 
     The wire  6  of this embodiment mode can be also set to take an action similar to that of the anchor wire of the above fifth embodiment mode, and is constructed as a comparatively thick wire by changing the material and the wire diameter. 
     Therefore, in this embodiment mode, similarly to the first embodiment mode, it is also possible to restrain the mechanical deformation of a wire connecting portion caused by excessively displacing the sensor chip  200  and a change in sensor characteristics collaterally caused by this mechanical deformation. 
     Modifications 
     The angular rate sensor device has been explained as an example as the sensor device of the present invention. However, the present invention is not limited to the angular rate sensor, but can be also applied to an acceleration sensor, a pressure sensor, a temperature sensor, a humidity sensor, an optical sensor, an image sensor, etc. 
     Namely, in the embodiment modes, the sensor chip  200  may be also an acceleration detecting element, a pressure detecting element, a temperature detecting element, a humidity detecting element, an optical detecting element and an image detecting element. 
     The circuit chip may be any chip of a circuit using a MOS transistor, a bipolar transistor, etc., a memory circuit, etc. 
     In short, in the sensor device in which the sensor chip is laminated and adhered onto the circuit chip through the adhesive material, and the sensor chip and the circuit chip are connected through the bonding wire, the present invention has a main portion in which the stopper for regulating the displacement of the sensor chip due to the deformation of the adhesive material is arranged around the sensor chip. The other portions can be suitably changed in design. 
     While the invention has been described with reference to preferred embodiments thereof, it is to be understood that the invention is not limited to the preferred embodiments and constructions. The invention is intended to cover various modification and equivalent arrangements. In addition, while the various combinations and configurations, which are preferred, other combinations and configurations, including more, less or only a single element, are also within the spirit and scope of the invention.