WO2021166768A1 - センサモジュール - Google Patents
センサモジュール Download PDFInfo
- Publication number
- WO2021166768A1 WO2021166768A1 PCT/JP2021/005010 JP2021005010W WO2021166768A1 WO 2021166768 A1 WO2021166768 A1 WO 2021166768A1 JP 2021005010 W JP2021005010 W JP 2021005010W WO 2021166768 A1 WO2021166768 A1 WO 2021166768A1
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- WO
- WIPO (PCT)
- Prior art keywords
- sensor module
- sensor
- connection pin
- external connector
- opening
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/54—Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/51—Housings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/02—Contact members
- H01R13/04—Pins or blades for co-operation with sockets
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/40—Circuit details for pick-up tubes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/52—Elements optimising image sensor operation, e.g. for electromagnetic interference [EMI] protection or temperature control by heat transfer or cooling elements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/57—Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/14—Structural association of two or more printed circuits
- H05K1/144—Stacked arrangements of planar printed circuit boards
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0007—Casings
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0007—Casings
- H05K9/0049—Casings being metallic containers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
- H01R12/50—Fixed connections
- H01R12/59—Fixed connections for flexible printed circuits, flat or ribbon cables or like structures
- H01R12/62—Fixed connections for flexible printed circuits, flat or ribbon cables or like structures connecting to rigid printed circuits or like structures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/02—Soldered or welded connections
- H01R4/025—Soldered or welded connections with built-in heat generating elements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/02—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections
- H01R43/0242—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections comprising means for controlling the temperature, e.g. making use of the curie point
Definitions
- This technology relates to, for example, a sensor module mounted on a vehicle.
- a camera device in which a camera device is mounted on a vehicle and visually recognized by a monitor device installed near the cockpit.
- This type of camera device has a substantially rectangular housing in which an image pickup lens, an image sensor, an external connector, etc. are incorporated. Built-in or mounted so that it faces. According to such a camera device, the area around the vehicle, which is a blind spot of the driver, can be projected, and safety and convenience can be improved.
- Patent Document 1 includes a shield case for EMC (Electromagnetic Compatibility) measures inside the housing, and the shield case provides a ground pattern of a flexible wiring board that connects a substrate on which an image sensor is mounted and an external connector.
- EMC Electromagnetic Compatibility
- the purpose of this technology is to provide a sensor module that can improve the soldering workability of the shield case to the ground wire and its connection reliability.
- the sensor module includes a housing, a sensor board, an external connector, a flexible wiring board, and a metal shield case.
- the sensor substrate has a sensor element and is arranged in the housing.
- the external connector is provided on the housing.
- the flexible wiring board electrically connects the sensor board and the external connector, and has a signal line and a ground line.
- the shield case has a bottom portion arranged between the flexible wiring board and the external connector, and a peripheral surface portion that covers the periphery of the sensor board.
- the external connector has a first connection pin connected to the signal line, a second connection pin connected to the ground line, and a third connection pin connected to the bottom of the shield case.
- the bottom portion includes a first hole portion through which the first connection pin penetrates, a second hole portion through which the second connection pin penetrates, and a third hole portion through which the third connection pin penetrates. And a heat storage portion provided around the third hole portion and coated with a solder material for joining the third connection pin to the bottom portion.
- the sensor module is provided with the heat storage portion at the bottom of the shield case, soldering between the shield case and the ground of the external connector becomes easy, and workability and connection reliability can be improved.
- the flexible wiring board may further have a base material end portion that supports the signal line and the ground line and is arranged at the bottom portion.
- the base material end portion has an opening through which the third connecting pin penetrates and has an opening area larger than the opening area of the third hole portion, and the heat storage portion is the same as the opening portion. It is provided in the opposite area.
- the heat storage portion may include a plurality of slit portions formed in an annular shape around the third hole portion.
- the heat storage portion may include a recess formed in an annular shape around the third hole portion.
- the heat storage unit may include a heat transfer layer having higher thermal conductivity than the metal material constituting the bottom portion.
- the third connection pin may be arranged at a position offset from the center of the opening.
- the opening may be formed in a circular shape or an elliptical shape.
- the opening may include a plurality of openings provided corresponding to the plurality of connection pins.
- the sensor element may be a solid-state image sensor.
- the sensor module may be configured to be mountable on a vehicle.
- FIG. 2 is a cross-sectional view taken along the line AA in FIG.
- FIG. 2 is a cross-sectional view taken along the line AA in FIG.
- FIG. 2 is a schematic plan view of the main part of the flexible wiring board in the sensor module.
- It is a top view of the shield case in the said sensor module.
- It is the schematic plan view which shows the other embodiment of the said shield case.
- It is a schematic plan view which shows still another embodiment of the said shield case.
- FIG. 1 is an exploded perspective view showing a configuration of a sensor module according to an embodiment of the present technology.
- the sensor module 100 of this embodiment is configured as a camera module for in-vehicle use. First, the overall configuration of the sensor module 100 will be described with reference to FIG.
- the sensor module 100 is configured to be mountable on a vehicle.
- the sensor module 100 is arranged outside, for example, a vehicle body (mounting object) (not shown), and images the front, rear, or side of the vehicle according to the mounting position.
- a sensor module 100 attached to a front portion of a vehicle body eg, a front grille
- the sensor module 100 attached to the rear portion eg, above the license plate
- the sensor module 100 attached to the side of the vehicle eg, the upper part of the pillars (A pillar, B pillar, pillar at the rearmost part of the vehicle (C pillar, D pillar)) or the side mirror
- the side of the vehicle eg, the upper part of the pillars (A pillar, B pillar, pillar at the rearmost part of the vehicle (C pillar, D pillar)
- the side mirror is in the lateral direction of the vehicle. Image the environment of.
- the sensor module 100 of this embodiment includes a housing 10, a sensor board 20, an external connector 30, a flexible wiring board 40, and a shield case 50.
- the housing 10 is configured by combining a front case 11 and a rear case 12 in the Z direction of the optical axis.
- the front case 11 and the rear case 12 are typically composed of an injection molded body made of a synthetic resin material.
- the front case 11 has a front portion 111 formed substantially perpendicular to the front-rear direction (Z direction) and a side surface portion 112 extending from the peripheral edge of the front portion 111 toward the rear case 12.
- the shape of the front surface portion 111 when viewed from the optical axis Z direction is substantially rectangular.
- the front case 11 is hollow, and a space portion for accommodating the sensor substrate 20 and the like is formed in a region surrounded by the front surface portion 111 and the side surface portion 112.
- a through hole 113 is formed in the central portion of the front surface portion 111 of the front case 11, and the lens barrel member 61 is inserted through the through hole 113 via the seal ring 62.
- the lens barrel member 61 supports a photographing lens having an optical axis Z, and is supported between the front case 11 and the sensor substrate 20 via a shield plate 63, a cushion member 64, and the like.
- the front case 11 has an open end 114 welded to the rear case 12 at the end of the side surface 112 on the rear case 12 side.
- the open end portion 114 is formed in a substantially rectangular shape corresponding to the outer shape of the front surface portion 111.
- the shape of the front surface portion 111 and the opening end portion 114 is not limited to a rectangle, and may be formed into other shapes such as a circle and a triangle.
- the rear case 12 is formed in a substantially rectangular shallow dish shape having a bottom surface portion 121 formed substantially vertically in the front-rear direction and a side surface portion 122 extending from the peripheral edge of the bottom surface portion 121 toward the front case 11. .. In the area surrounded between the bottom surface portion 121 and the side surface portion 122, a space portion for accommodating the shield case 50 and the like is formed. A substantially rectangular step portion 123 is formed between the bottom surface portion 121 and the outer peripheral surface side of the side surface portion 122.
- the front case 11 and the rear case 12 are integrated with each other by welding the open end 114 of the front case 11 to the step portion 123.
- the welding method is not particularly limited, and an ultrasonic welding method, a laser welding method, or the like can be applied.
- the sensor board 20 is a spacer arranged between the front board 21 facing the front surface 111 of the front case 11, the rear board 22 facing the bottom surface 121 of the rear case 12, and the front board 21 and the rear board 22. It has 23 and.
- the front substrate 21 and the rear substrate 22 are composed of a rigid double-sided wiring board such as a glass epoxy board, and the spacer 23 defines the facing distance between the boards.
- the front board 21 and the rear board 22 are mechanically and electrically connected via a board connector (BtoB connector) (not shown).
- the sensor substrate 20 is not limited to the example of being composed of two substrates of the front substrate 21 and the rear substrate 22, and may be composed of one substrate.
- a solid-state image sensor 24 is mounted on the front substrate 21 as a sensor element.
- the solid-state image sensor 24 is an image sensor such as a CMOS (Complementary Metal-Oxide Semiconductor) or a CCD (Charge Coupled Device).
- the front substrate 21 is joined to the lens barrel member 61, and the solid-state image sensor 24 is arranged on the focal position of the lens barrel member 61.
- the rear board 22 is electrically connected to the external connector 30 provided on the bottom surface portion 121 of the rear case 12 via the flexible wiring board 40.
- the external connector 30 is provided on the rear case 12.
- the external connector 30 is for electrically connecting the sensor board 20 and the vehicle body side, power is supplied from the vehicle body side to the sensor board 20 via the external connector 30, and the vehicle body is supplied from the sensor board 20.
- An image signal (output signal of the solid-state image sensor 24) is transmitted to the side.
- FIG. 2 is a schematic plan view showing the internal structure of the main part on the rear case 12 side
- FIG. 3 is a cross-sectional view taken along the line AA in FIG.
- the external connector 30 includes a signal terminal 31 provided on the bottom surface 121 of the rear case 12, a tubular shield terminal 32 formed concentrically with the signal terminal 31, and a signal terminal 31. It has an insulating member 33 arranged between the shield terminal 32 and the shield terminal 32.
- the signal terminal 31 and the shield terminal 32 are each made of a metal material and can be connected to a coaxial cable (not shown).
- the bottom surface 121 of the rear case 12 is provided with a tubular portion 124 concentric with the external connector 30.
- the tubular portion 124 is for protecting the signal terminal 31 and the shield terminal 32 from the outside, and is formed concentrically with the external connector 30 on the outside of the external connector 30.
- the external connector 30 further has a first connection pin 301, a second connection pin 302, and a third connection pin 303.
- the first connection pin 301 penetrates the bottom surface portion 121 of the rear case 12 and is integrally formed at one end of the signal terminal 31.
- the second connection pin 302 and the third connection pin 303 penetrate the bottom surface portion 121 of the rear case 12 and are integrally formed at one end of the shield terminal 32.
- a plurality of second connection pins 302 and a plurality of third connection pins 303 are formed, for example, two each as shown in FIG.
- the second connection pin 302 and the third connection pin 303 are arranged at each vertex of a virtual quadrangle centered on the first connection pin 301.
- each of the second connection pins 302 is arranged at a symmetrical position (diagonal position) with respect to the first connection pin 301
- each third connection pin 303 is also symmetrical with respect to the first connection pin 301. It is placed in a symmetrical position (diagonal position).
- the flexible wiring board 40 electrically connects the sensor board 20 and the external connector 30.
- the flexible wiring board 40 is a wiring board in which a signal line and a ground line are routed on a flexible base material such as polyimide.
- the signal line is a wiring unit that transmits an image signal from the sensor board 20
- the ground line is a wiring unit that is connected to the ground line of the sensor board 20.
- the flexible wiring board 40 has a first base material end 41 connected to the sensor board 20 (rear board 22) and a second base material end 42 connected to the external connector 30.
- the first base material end portion 41 is connected to the rear substrate 22 via, for example, a connector member 43.
- the second base material end portion 42 is connected to the external connector 30 by soldering.
- FIG. 4 is a schematic plan view of the second base material end portion 42 of the flexible wiring board 40.
- the second substrate end 42 supports the signal line 401 and the ground line 402.
- the signal line 401 and the ground line 402 each have a land portion that is electrically connected to the external connector 30.
- the signal line 401 has a first land portion 401a including a through hole through which the first connection pin 301 penetrates and an annular conductor portion formed around the through hole.
- the first connection pin 301 is electrically connected to the signal line 401 by being soldered to the first land portion 401a.
- the ground wire 402 has a second land portion 402a including a through hole through which the second connecting pin 302 penetrates and an annular conductor portion formed around the through hole.
- the land portions 402a are provided according to the number and positions of the second connection pins 302, and are provided at two locations in the present embodiment.
- the second connection pin 302 is electrically connected to the ground wire 402 by being soldered to the second land portion 402a.
- the second base material end 42 of the flexible wiring board 40 further has an opening 403 through which the third connection pin 303 of the external connector 30 penetrates.
- the openings 403 are provided according to the number and positions of the third connection pins 303, and are provided at two locations in the present embodiment.
- the opening 403 has a larger opening area than the through holes forming the first and second land portions 401a and 402a.
- the opening 403 is a region for forming a pool of solder material for joining the third connection pin 303 to the shield case 50, as will be described later.
- the shape of the opening 403 is not particularly limited, but in view of the wettability of the solder material and the like, the shape of the opening 403 is a shape that does not include a corner, for example, an oval shape, an elliptical shape, or a circular shape as shown in the figure. Is preferable.
- the shield case 50 is one of the EMC countermeasure parts that protects the sensor substrate 20 from electromagnetic noise, and is composed of a substantially rectangular box body in which one end on the front case 11 side is opened.
- the shield case 50 is typically made of a metal material such as stainless steel or an aluminum alloy.
- the shield case 50 is arranged in a space formed by the bottom surface portion 121 and the side surface portion 122 of the rear case 12.
- the shield case 50 has a bottom portion 51 arranged on the bottom surface portion 121 of the rear case 12, and a peripheral surface portion 52 that covers the periphery of the sensor substrate 20.
- the peripheral surface portion 52 extends from the peripheral edge portion of the bottom portion 51 toward the front case 11 side, and forms a space portion for accommodating the sensor substrate 20.
- the end portion of the peripheral surface portion 52 elastically contacts the peripheral edge portion of the lens barrel member 61.
- the bottom portion 51 of the shield case 50 is arranged between the second base material end portion 42 of the flexible wiring board 40 and the external connector 30.
- the bottom portion 51 is a substantially rectangular flat plate portion parallel to the bottom surface portion 121 of the rear case 12.
- FIG. 5 is a plan view showing the bottom portion 51 of the shield case 50.
- the bottom portion 51 of the shield case 50 has a plurality of holes through which each connection pin of the external connector 30 penetrates. That is, the bottom 51 has a first hole 501 through which the first connection pin 301 penetrates, a second hole 502 through which the second connection pin 302 penetrates, and a third hole 303 through which the third connection pin 303 penetrates. It has 3 holes 503.
- the second hole 502 and the third hole 503 are provided corresponding to the number and position of the second connection pin 302 and the third connection pin 303, respectively, and are provided at two locations in the present embodiment, respectively. Be done.
- the bottom 51 of the shield case 50 is electrically connected to the shield terminal 32 of the external connector 30 by being soldered to the third connection pin 303 of the external connector 30.
- the surface of the bottom 51 may be solder-plated or the like.
- the bottom portion 51 of the shield case 50 has a heat storage portion 510 provided around the third hole portion 503.
- the heat storage portion 510 is a region covered with a solder material that joins the third connection pin 303 to the bottom portion 51.
- the heat storage portion 510 is provided in a region facing the opening 403 formed in the second base material end portion 42 of the flexible wiring board 40.
- the opening 403 has an opening area larger than the opening area of the third hole 503, and the heat storage portion 510 is provided at least in the region of the bottom portion 51 exposed to the outside through the opening 403.
- the heat storage unit 510 has a function of storing the heat required for soldering in the opening 403 when the third connection pin 303 and the shield case 50 are joined. As a result, the solderability of the third connection pin 303 is enhanced, and the soldering workability and connection reliability between the shield case 50 and the external connector 30 can be enhanced.
- the heat storage unit 510 in the present embodiment includes a plurality of slit portions 511 formed in an annular shape around the third hole portion 503.
- the plurality of slit portions 511 are arranged in an annular shape so as to surround the region of the shield case 50 exposed from the opening 403 of the flexible wiring board 40.
- each slit portion 511 is not particularly limited, and as shown in FIG. 5, a linear slit portion or a curved slit portion may be included.
- the plurality of slit portions 511 are typically formed along the opening edge in a shape corresponding to the opening shape of the opening 403.
- the plurality of slit portions 511 may be provided inside the opening edge portion of the opening portion 403, but by providing the plurality of slit portions 511 outside the opening edge portion, the area of the heat storage portion 510 can be increased.
- the width and arrangement interval of each slit portion 511 are not particularly limited, and can be arbitrarily set according to the amount of heat storage in the heat storage portion 510, the strength of the bottom portion 51 of the shield case 50, and the like.
- the position of the third hole 503 in the opening 403 is not particularly limited, and may be the center of the opening 403 or a position offset from the center. In the present embodiment, as shown in FIG. 5, the third hole 503 is provided at a position offset from the center of the opening 403. As a result, when the third connection pin 303 is soldered, the area of the solder pool can be easily secured, and the soldering workability and the connection reliability can be further improved.
- the bottom 51 of the shield case 50 further has a positioning hole 504 with the bottom 121 of the rear case 12.
- the positioning hole portions 504 are provided at a plurality of positions and are fitted with the protrusions 125 provided on the bottom surface portion 121 of the rear case 12, respectively.
- the shape of the positioning hole portion 504 is not particularly limited and is typically circular, but at least a part thereof may be oval or elliptical. As a result, assembly errors due to tolerances and the like can be absorbed, and assembling performance is improved.
- the protrusion 125 does not have to be provided at a position corresponding to all the positioning hole portions 504, and may be provided at a position corresponding to at least two positioning hole portions 504.
- the method of manufacturing the sensor module 100 in the present embodiment is flexible between a step of accommodating the sensor substrate 20 in the front case 11, a step of accommodating the shield case 50 in the rear case 12, and the sensor substrate 20 and the external connector 30.
- the process of connecting the flexible wiring board 40 and the shield case 50 to the external connector 30 will be described.
- the second base material end 42 of the flexible wiring board 40 is arranged on the bottom 51 of the shield case 50 housed in the rear case 12.
- the second base material end portion 42 may be temporarily fixed to the bottom portion 51 of the shield case 50 using double-sided tape or the like.
- the first connection pin 301 of the external connector 30 penetrates the first hole 501 of the shield case 50 and the first land portion 401a of the flexible wiring board 40.
- the second connection pin 302 of the external connector 30 penetrates the second hole 502 of the shield case 50 and the second land portion 402a of the flexible wiring board 40.
- the third connection pin 303 of the external connector 30 penetrates the third hole 503 of the shield case 50 and the opening 403 of the flexible wiring board 40.
- soldering method the laser soldering method is adopted in this embodiment. Not limited to this, a soldering method using a soldering iron may be adopted.
- the first to third connection pins 301 to 303 are heated by irradiating laser light having a predetermined wavelength. Then, the wire rod of the solder material is brought into contact with the first to third connection pins 301 to 303 to be melted, and the melted solder material forms a fillet that covers the periphery of the first to third connection pins 301 to 303.
- the first to third connection pins 301 to 303 are soldered individually, but may be performed at the same time.
- the laser light having a predetermined wavelength for example, an infrared laser having a wavelength of 800 nm to 1000 nm can be used.
- the laser light may be continuous light or pulsed light.
- the solder material may contain a flux. Good solderability can be ensured by removing oxides and the like generated on the surface of the object to be bonded by the flux during solder melting.
- the heat storage portion 510 having a plurality of slit portions 511 is provided around the third hole portion 503 through which the third connection pin 303 penetrates, the third connection pin 303 and the shield In soldering to the case 50, it is suppressed that the heat generated by the irradiation of the third connecting pin 303 with the laser beam is widely diffused to the bottom 51 of the shield case 50. As a result, the soldering workability of the third connection pin 303 is enhanced. Further, since the opening of the flexible wiring board 40 that exposes the heat storage portion 510 to the outside is formed in an elliptical or oval shape, the molten solder material wets and spreads over the entire area of the opening 403. As a result, a solder joint portion having a desired joint strength can be stably formed.
- the shield case 50 since a plurality of third connection pins 303 for electrically connecting the shield terminal 32 of the external connector 30 to the shield case 50 are provided, the shield case 50 is stably connected to the ground potential. This allows the desired shielding effect to be obtained.
- the heat distribution of the shield case 50 should be made uniform when the third connection pin 303 is soldered. Can be done. As a result, the heat load acting on the first connection pin 301 (signal line) can be reduced.
- the heat storage portion 510 having a predetermined heat storage function is formed by providing a plurality of slit portions 511 around the third hole portion 503 of the shield case 50, but the present invention is not limited to this. ..
- the heat storage portion 510 may be formed by the recesses 512 formed in an annular shape around the third hole portion 503. Since a thin portion is locally formed on the bottom of the shield case 50 by the concave portion 512, it is possible to suppress heat diffusion from the inner peripheral side to the outer peripheral side of the concave portion 512.
- the heat storage portion 510 may be formed by the heat transfer layer 513 locally provided around the third hole portion 503.
- the heat transfer portion 513 is made of a material having higher thermal conductivity than the metal material constituting the bottom portion 51 of the shield case 50. Thereby, the same action and effect as described above can be obtained.
- the heat transfer layer 513 is not particularly limited, and may be a metal sheet, a metal plating layer, or the like.
- the technology according to the present disclosure can be applied to various products.
- the technology according to the present disclosure includes any type of movement such as automobiles, electric vehicles, hybrid electric vehicles, motorcycles, bicycles, personal mobility, airplanes, drones, ships, robots, construction machines, agricultural machines (tractors), and the like. It may be realized as a sensor module mounted on the body.
- the camera module has been described as an example of the sensor module 100, but the present invention is not limited to this.
- this technology can be applied to a sensor module equipped with a distance measuring sensor such as LIDAR (Light Detection and Ringing) or TOF (Time of Flight) as a sensor element.
- LIDAR Light Detection and Ringing
- TOF Time of Flight
- the present technology can also adopt the following configurations.
- a sensor substrate having a sensor element and arranged in the housing,
- An external connector provided on the housing and
- a flexible wiring board that electrically connects the sensor board and the external connector and has a signal line and a ground line.
- a metal shield case having a bottom portion arranged between the flexible wiring board and the external connector and a peripheral surface portion covering the periphery of the sensor board is provided.
- the external connector has a first connection pin connected to the signal line, a second connection pin connected to the ground line, and a third connection pin connected to the bottom of the shield case.
- the bottom portion includes a first hole portion through which the first connection pin penetrates, a second hole portion through which the second connection pin penetrates, and a third hole portion through which the third connection pin penetrates.
- a sensor module having a heat storage portion provided around the third hole portion and coated with a solder material for joining the third connection pin to the bottom portion.
- the flexible wiring board further has a substrate end that supports the signal line and the ground line and is arranged at the bottom.
- the base material end portion has an opening through which the third connecting pin penetrates and has an opening area larger than the opening area of the third hole.
- the heat storage unit is a sensor module provided in a region facing the opening.
- the heat storage portion is a sensor module including a plurality of slit portions formed in an annular shape around the third hole portion.
- the heat storage unit is a sensor module including a recess formed in an annular shape around the third hole portion.
- the heat storage unit is a sensor module including a heat transfer layer having higher thermal conductivity than the metal material constituting the bottom portion.
- the third connection pin is a sensor module arranged at a position offset from the center of the opening. (7) The sensor module according to any one of (2) to (6) above.
- a sensor module in which the opening is formed in a circular shape or an elliptical shape.
- the third connecting pin includes a plurality of connecting pins.
- the opening is a sensor module including a plurality of openings provided corresponding to the plurality of connection pins.
- the plurality of connection pins are sensor modules provided at symmetrical positions with respect to the first connection pin.
- the sensor element is a sensor module that is a solid-state image sensor. (11) The sensor module according to any one of (1) to (10) above.
- the sensor module is a sensor module configured to be mounted on a vehicle.
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Abstract
Description
前記センサ基板は、センサ素子を有し、前記ハウジング内に配置される。
前記外部コネクタは、前記ハウジングに設けられる。
前記フレキシブル配線基板は、前記センサ基板と前記外部コネクタとの間を電気的に接続し、信号線とグランド線とを有する。
前記シールドケースは、前記フレキシブル配線基板と前記外部コネクタとの間に配置された底部と、前記センサ基板の周囲を覆う周面部とを有する。
前記外部コネクタは、前記信号線と接続される第1の接続ピンと、前記グランド線と接続される第2の接続ピンと、前記シールドケースの前記底部と接続される第3の接続ピンとを有する。
前記底部は、前記第1の接続ピンが貫通する第1の孔部と、前記第2の接続ピンが貫通する第2の孔部と、前記第3の接続ピンが貫通する第3の孔部と、前記第3の孔部の周囲に設けられ前記第3の接続ピンを前記底部に接合するはんだ材料で被覆される蓄熱部とを有する。
図1は、本技術の一実施形態に係るセンサモジュールの構成を示す分解斜視図である。本実施形態のセンサモジュール100は、車載用途のカメラモジュールとして構成される。まず、図1を参照してセンサモジュール100の全体構成について説明する。
例えば、車体の前方部(例:フロントグリル)に取り付けられたセンサモジュール100は、車両の前方の環境を撮像する。また、後部(例:ナンバープレートの上)に取り付けられたセンサモジュール100は、車両の後方の環境を撮像する。また、車両の側方(例:ピラー(Aピラー、Bピラー、車両最後部のピラー(Cピラー、Dピラー))の上部や、サイドミラー)に取り付けられたセンサモジュール100は、車両の横方向の環境を撮像する。
ハウジング10は、フロントケース11とリアケース12とを光軸Z方向に組み合わせて構成される。フロントケース11およびリアケース12は、典型的には、合成樹脂材料の射出成形体で構成される。
センサ基板20は、フロントケース11の前面部111に対向するフロント基板21と、リアケース12の底面部121に対向するリア基板22と、フロント基板21とリア基板22との間に配置されたスペーサ23とを有する。フロント基板21およびリア基板22は、ガラスエポキシ基板等のリジッド性を有する両面配線基板で構成され、スペーサ23によって各基板間の対向距離が規定される。フロント基板21およびリア基板22は、図示しない基板コネクタ(BtoBコネクタ)を介して機械的かつ電気的に接続される。センサ基板20は、フロント基板21およびリア基板22の2枚の基板で構成される例に限られず、1枚の基板で構成されてもよい。
外部コネクタ30は、リアケース12に設けられる。外部コネクタ30は、センサ基板20と車体側とを電気的に接続するためのものであり、外部コネクタ30を介して、車体側からセンサ基板20へ電力が供給され、および、センサ基板20から車体側へ画像信号(固体撮像素子24の出力信号)が送信される。
フレキシブル配線基板40は、センサ基板20と外部コネクタ30との間を電気的に接続する。フレキシブル配線基板40は、ポリイミド等のフレキシブル性を有する基材上に信号線およびグランド線が引き回された配線基板である。上記信号線は、センサ基板20からの画像信号を伝送する配線部であり、グランド線はセンサ基板20のグランドラインに接続される配線部である。センサ基板20と外部コネクタ30との間をフレキシブル配線基板40で接続することで、センサ基板20と外部コネクタ30との間の距離のばらつき(公差)を吸収し、これらの間の安定した電気的接続信頼性を確保することができる。
シールドケース50は、センサ基板20を電磁ノイズから保護するEMC対策部品のひとつであって、フロントケース11側の一端が開口する略矩形の箱体で構成される。シールドケース50は、典型的には、ステンレス鋼、アルミニウム合金等の金属材料で構成される。
続いて、以上のように構成されるセンサモジュール100の製造方法について説明する。
以上の実施形態では、シールドケース50の第3の孔部503の周囲に複数のスリット部511を設けることによって所定の蓄熱機能を有する蓄熱部510を形成するようにしたが、これに限られない。例えば図6に示すように、第3の孔部503の周囲に環状に形成された凹部512によって蓄熱部510を形成するようにしてもよい。凹部512によってシールドケース50の底部に薄肉部が局所的に形成されるため、凹部512の内周側から外周側への熱の拡散を抑制することができる。
本開示に係る技術は、様々な製品へ応用することができる。例えば、本開示に係る技術は、自動車、電気自動車、ハイブリッド電気自動車、自動二輪車、自転車、パーソナルモビリティ、飛行機、ドローン、船舶、ロボット、建設機械、農業機械(トラクター)などのいずれかの種類の移動体に搭載されるセンサモジュールとして実現されてもよい。
(1) ハウジングと、
センサ素子を有し、前記ハウジング内に配置されるセンサ基板と、
前記ハウジングに設けられる外部コネクタと、
前記センサ基板と前記外部コネクタとの間を電気的に接続し、信号線とグランド線とを有するフレキシブル配線基板と、
前記フレキシブル配線基板と前記外部コネクタとの間に配置された底部と、前記センサ基板の周囲を覆う周面部とを有する金属製のシールドケースと
を具備し、
前記外部コネクタは、前記信号線と接続される第1の接続ピンと、前記グランド線と接続される第2の接続ピンと、前記シールドケースの前記底部と接続される第3の接続ピンとを有し、
前記底部は、前記第1の接続ピンが貫通する第1の孔部と、前記第2の接続ピンが貫通する第2の孔部と、前記第3の接続ピンが貫通する第3の孔部と、前記第3の孔部の周囲に設けられ前記第3の接続ピンを前記底部に接合するはんだ材料で被覆される蓄熱部とを有する
センサモジュール。
(2)上記(1)に記載のセンサモジュールであって、
前記フレキシブル配線基板は、前記信号線および前記グランド線を支持し前記底部に配置される基材端部をさらに有し、
前記基材端部は、前記第3の接続ピンが貫通し前記第3の孔部の開口面積よりも大きな開口面積を有する開口部を有し、
前記蓄熱部は、前記開口部と対向する領域に設けられる
センサモジュール。
(3)上記(2)に記載のセンサモジュールであって、
前記蓄熱部は、前記第3の孔部の周囲に環状に形成された複数のスリット部を含む
センサモジュール。
(4)上記(2)に記載のセンサモジュールであって、
前記蓄熱部は、前記第3の孔部の周囲に環状に形成された凹部を含む
センサモジュール。
(5)上記(2)に記載のセンサモジュールであって、
前記蓄熱部は、前記底部を構成する金属材料よりも熱伝導性の高い伝熱層を含む
センサモジュール。
(6)上記(2)~(5)のいずれか1つに記載のセンサモジュールであって、
前記第3の接続ピンは、前記開口部の中心からオフセットした位置に配置される
センサモジュール。
(7)上記(2)~(6)のいずれか1つに記載のセンサモジュールであって、
前記開口部は円形状または楕円形状に形成される
センサモジュール。
(8)上記(1)~(7)のいずれか1つに記載のセンサモジュールであって、
前記第3の接続ピンは、複数の接続ピンを含み、
前記開口部は、前記複数の接続ピンに対応して設けられた複数の開口部を含む
センサモジュール。
(9)上記(8)に記載のセンサモジュールであって、
前記複数の接続ピンは、前記第1の接続ピンに関して対称な位置に設けられる
センサモジュール。
(10)上記(1)~(9)のいずれか1つに記載のセンサモジュールであって、
前記センサ素子は、固体撮像素子である
センサモジュール。
(11)上記(1)~(10)のいずれか1つに記載のセンサモジュールであって、
前記センサモジュールは、車両に取り付け可能に構成される
センサモジュール。
11…フロントケース
12…リアケース
20…センサ基板
24…固体撮像素子(センサ素子)
30…外部コネクタ
31…信号端子
32…グランド端子
40…フレキシブル配線基板
41,42…基材端部
50…シールドケース
51…底部
52…周面部
100…センサモジュール
301…第1の接続ピン
302…第2の接続ピン
303…第3の接続ピン
310…蓄熱部
311…スリット部
312…凹部
313…伝熱層
401…信号線
402…グランド線
501…第1の孔部
502…第2の孔部
503…第3の孔部
Claims (11)
- ハウジングと、
センサ素子を有し、前記ハウジング内に配置されるセンサ基板と、
前記ハウジングに設けられる外部コネクタと、
前記センサ基板と前記外部コネクタとの間を電気的に接続し、信号線とグランド線とを有するフレキシブル配線基板と、
前記フレキシブル配線基板と前記外部コネクタとの間に配置された底部と、前記センサ基板の周囲を覆う周面部とを有する金属製のシールドケースと
を具備し、
前記外部コネクタは、前記信号線と接続される第1の接続ピンと、前記グランド線と接続される第2の接続ピンと、前記シールドケースの前記底部と接続される第3の接続ピンとを有し、
前記底部は、前記第1の接続ピンが貫通する第1の孔部と、前記第2の接続ピンが貫通する第2の孔部と、前記第3の接続ピンが貫通する第3の孔部と、前記第3の孔部の周囲に設けられ前記第3の接続ピンを前記底部に接合するはんだ材料で被覆される蓄熱部とを有する
センサモジュール。 - 請求項1に記載のセンサモジュールであって、
前記フレキシブル配線基板は、前記信号線および前記グランド線を支持し前記底部に配置される基材端部をさらに有し、
前記基材端部は、前記第3の接続ピンが貫通し前記第3の孔部の開口面積よりも大きな開口面積を有する開口部を有し、
前記蓄熱部は、前記開口部と対向する領域に設けられる
センサモジュール。 - 請求項2に記載のセンサモジュールであって、
前記蓄熱部は、前記第3の孔部の周囲に環状に形成された複数のスリット部を含む
センサモジュール。 - 請求項2に記載のセンサモジュールであって、
前記蓄熱部は、前記第3の孔部の周囲に環状に形成された凹部を含む
センサモジュール。 - 請求項2に記載のセンサモジュールであって、
前記蓄熱部は、前記底部を構成する金属材料よりも熱伝導性の高い伝熱層を含む
センサモジュール。 - 請求項2に記載のセンサモジュールであって、
前記第3の接続ピンは、前記開口部の中心からオフセットした位置に配置される
センサモジュール。 - 請求項2に記載のセンサモジュールであって、
前記開口部は円形状または楕円形状に形成される
センサモジュール。 - 請求項1に記載のセンサモジュールであって、
前記第3の接続ピンは、複数の接続ピンを含み、
前記開口部は、前記複数の接続ピンに対応して設けられた複数の開口部を含む
センサモジュール。 - 請求項8に記載のセンサモジュールであって、
前記複数の接続ピンは、前記第1の接続ピンに関して対称な位置に設けられる
センサモジュール。 - 請求項1に記載のセンサモジュールであって、
前記センサ素子は、固体撮像素子である
センサモジュール。 - 請求項1に記載のセンサモジュールであって、
前記センサモジュールは、車両に取り付け可能に構成される
センサモジュール。
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| EP21757095.1A EP4109874B1 (en) | 2020-02-19 | 2021-02-10 | Sensor module |
| CN202180014210.4A CN115088241B (zh) | 2020-02-19 | 2021-02-10 | 传感器模块 |
| JP2022501838A JP7491992B2 (ja) | 2020-02-19 | 2021-02-10 | センサモジュール |
| KR1020227027018A KR102901370B1 (ko) | 2020-02-19 | 2021-02-10 | 센서 모듈 |
| CN202510841316.1A CN120658934A (zh) | 2020-02-19 | 2021-02-10 | 传感器模块 |
| US17/799,231 US12212825B2 (en) | 2020-02-19 | 2021-02-10 | Sensor module |
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| DE102024101712A1 (de) | 2024-01-22 | 2025-07-24 | Connaught Electronics Ltd. | Fahrzeugkamera mit spezifisch gestalteter wärmeleitender Materialkette auf einer Platine, sowie Verfahren zum Montieren einer Fahrzeugkamera |
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| DE102015121396A1 (de) | 2015-12-09 | 2017-06-14 | Connaught Electronics Ltd. | Kamera mit einem Gehäuse zum Abschirmen von elektromagnetischer Strahlung und Kraftfahrzeug |
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| CN120658934A (zh) | 2025-09-16 |
| EP4109874A4 (en) | 2023-08-09 |
| US12212825B2 (en) | 2025-01-28 |
| KR102901370B1 (ko) | 2025-12-18 |
| CN115088241A (zh) | 2022-09-20 |
| EP4109874A1 (en) | 2022-12-28 |
| EP4109874B1 (en) | 2025-06-11 |
| CN115088241B (zh) | 2025-07-22 |
| JP7491992B2 (ja) | 2024-05-28 |
| KR20220143825A (ko) | 2022-10-25 |
| US20230071961A1 (en) | 2023-03-09 |
| JPWO2021166768A1 (ja) | 2021-08-26 |
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