Patent Description:
The present invention relates to an electronic device, an imaging apparatus, and a mobile body.

Electronic devices such as onboard cameras are required to be downsized and to perform various processing at a high speed. As a result of a circuit board being multilayered and highly-integrated for downsizing, radiation noise and the amount of heat generated by an electronic device of the circuit board are increased. There is proposed a configuration in which the entirety of the side surface of a circuit board is covered by a shield member and in which the circuit board and a heat conduction member abut each other via a heat conduction member made of a soft material such as silicone gel (refer to PTL <NUM>).

<CIT> discloses an imaging apparatus comprising: an imaging optical system; an image sensor for capturing a subject image formed through the imaging optical system; one or more circuit boards having at least one of the image sensor and an electronic component mounted thereon; a housing having an opening for exposing the imaging optical system to a subject, the housing for supporting the imaging optical system, the image sensor, and the one or more circuit boards; a signal connection unit having a plurality of terminals for transmitting an image signal of the subject image captured by the image sensor to an outside of the housing; and a heat transfer unit having insulating properties and connected to the plurality of terminals, the heat transfer unit for transferring heat generated from at least one of the image sensor and the electronic component to the plurality of terminals.

<CIT> discloses a camera module comprising: a lens unit; a housing coupled with the lens unit; a plurality of boards located inside the housing while being spaced apart from each other; and an electromagnetic-field shield located inside the housing in order to prevent outward leakage of an electromagnetic field formed in each of the boards, wherein the electromagnetic-field shield is provided with a coupling member to enable the boards to be coupled to the electromagnetic-field shield while being spaced apart from each other in an optical axis direction of the lens unit, wherein the plurality of boards are electrically connected to a ground wire, and the ground wire is one of a plurality of cables electrically connected to the plurality of boards, and wherein the coupling member includes coupling bosses, each having one end protruding from an inner surface of the electromagnetic-field shield.

The present invention provides an electronic device according to claim <NUM>, and a mobile body according to claim <NUM>. Further embodiments of the present invention are disclosed in the dependent claims.

Hereinafter, an embodiment of an electronic device to which the present disclosure is applied will be described with reference to the drawings.

Specifically, an electronic device according to one embodiment of the present disclosure is, for example, an imaging apparatus. As illustrated in <FIG>, an electronic device <NUM> applied to the imaging apparatus according to the present embodiment is, for example, mounted on a mobile body <NUM>.

The mobile body <NUM> may include, for example, vehicles, marine vessels, aircrafts, and the like. Vehicles may include, for example, automobiles, industrial vehicles, railway vehicles, living vehicles, fixed-wing aircrafts that travel on runways, and the like. Automobiles may include, for example, passenger cars, trucks, buses, bicycles, trolley buses, and the like. Industrial vehicles may include, for example, industrial vehicles for agriculture and construction, and the like. Industrial vehicles may include, for example, forklifts, golf carts, and the like. Industrial vehicles for agriculture may include, for example, tractors, cultivators, transplanters, binders, combine harvesters, lawnmowers, and the like. Industrial vehicles for construction may include, for example, bulldozers, scrapers, power shovels, crane trucks, dump trucks, road rollers, and the like. Vehicles may include man-powered vehicles. Classification of vehicles is not limited to the above examples. For example, automobiles may include industrial vehicles that can travel on roads. The same vehicles may be included in a plurality of categories. Marine vessels may include, for example, jet skis, boats, tankers, and the like. Aircrafts may include, for example, fixed-wing aircrafts, rotary-wing aircrafts, and the like.

As illustrated in <FIG> and <FIG>, the electronic device <NUM> includes a first substrate <NUM>, a second substrate <NUM>, a third substrate <NUM>, a first metal plate <NUM>, and a second metal plate <NUM>. The electronic device <NUM> may further include a heat conductor <NUM>, an imaging optical system <NUM>, a first housing <NUM>, and a second housing <NUM>.

As illustrated in <FIG>, the first substrate <NUM> has a flat shape. The first substrate <NUM> may have a substantially rectangular shape. As illustrated in <FIG> and <FIG>, an imaging element <NUM> as an electronic component is mounted on the first substrate <NUM> on a side opposite to a surface facing a first flat portion, which will be described later. The imaging element <NUM> is, for example, a CCD (Charge Coupled Device) image sensor and a CMOS (Complementary Metal Oxide Semiconductor) image sensor. The imaging element <NUM> images an optical image formed on a light receiving surface and thereby generates an image signal. A first connector <NUM> for electrical connection to the second substrate <NUM> may be mounted on the first substrate <NUM> at a rear surface of the surface on which the imaging element <NUM> is mounted.

As illustrated in <FIG>, the second substrate <NUM> has a flat shape. The second substrate <NUM> may have a substantially rectangular shape. An electronic component <NUM> is mounted on at least one main surface of the second substrate <NUM>. The electronic component <NUM> drives the imaging element <NUM> or processes an image signal generated by the imaging element <NUM>. A second connector <NUM> for electrical connection to the first connector <NUM> may be mounted on one main surface of the second substrate <NUM>.

The third substrate <NUM> has a flat shape. The third substrate <NUM> may have a substantially rectangular shape. An electronic component <NUM> is mounted on at least one main surface of the third substrate <NUM>. The electronic component <NUM> drives the imaging element <NUM> or processes an image signal generated by the imaging element <NUM>. A third connector <NUM> for electrical connection to the second housing <NUM> may be mounted on one main surface of the third substrate <NUM>.

The third substrate <NUM> may be electrically connected to the second substrate <NUM> by a flexible substrate <NUM>. The third connector <NUM> may be mounted on a main surface of the third substrate <NUM> on the same side as the second connector <NUM> in a state in which the entirety of the flexible substrate <NUM> is extended in a flat shape.

As illustrated in <FIG> and <FIG>, in the electronic device <NUM>, the first substrate <NUM>, the second substrate <NUM>, and the third substrate <NUM> are positioned toward a stacking direction in order with respective main surfaces facing each other.

As illustrated in <FIG>, the first metal plate <NUM> includes a first flat portion <NUM> and a first shield portion <NUM>. The first metal plate <NUM> may further include a third shield portion <NUM>.

The first flat portion <NUM> has a flat shape. The first flat portion <NUM> may have a substantially rectangular shape wider than the first substrate <NUM>, the second substrate <NUM>, and the third substrate <NUM>. As illustrated in <FIG> and <FIG>, in the electronic device <NUM>, the first flat portion <NUM> is interposed between the first substrate <NUM> and the second substrate <NUM>. In the electronic device <NUM>, the first flat portion <NUM> may have a main surface substantially parallel to main surfaces of the first substrate <NUM> and the second substrate <NUM>.

In the electronic device <NUM>, the first flat portion <NUM> directly or indirectly abuts the electronic component <NUM> mounted on the first substrate <NUM> and the electronic component <NUM> mounted on the second substrate <NUM>. In the electronic device <NUM>, the first flat portion <NUM>, for example, abuts the imaging element <NUM> as an electronic component indirectly via a heat dissipation sheet <NUM> and the first substrate <NUM>. In the electronic device <NUM>, the first flat portion <NUM>, for example, abuts the electronic component <NUM> mounted on the second substrate <NUM> indirectly via the heat dissipation sheet <NUM>. The heat dissipation sheet <NUM> may be made of, for example, a soft material having shape followability, like filler-containing silicone rubber, and having relatively large thermal conductivity.

As illustrated in <FIG>, an opening op may be provided in the first flat portion <NUM>. The opening op may be larger than the first connector <NUM> viewed in a direction perpendicular to a main surface of the first substrate <NUM>. As illustrated in <FIG>, in the electronic device <NUM>, the first connector <NUM> may be inserted into the opening op. In the electronic device <NUM>, the second connector <NUM> may be connected to the first connector <NUM> inserted into the opening op.

As illustrated in <FIG>, the first shield portion <NUM> stands along the whole extent of the outer edge of the first flat portion <NUM> on the side of a main surface of the first flat portion <NUM> facing the first substrate <NUM>. As illustrated in <FIG> and <FIG>, in the electronic device <NUM>, the first shield portion <NUM> covers the entire circumference of the side surface of the first substrate <NUM>.

As illustrated in <FIG>, the third shield portion <NUM> may stand along two parallel sides of the first flat portion <NUM> on a side opposite to the main surface at which the first shield portion <NUM> of the first flat portion <NUM> stands. As illustrated in <FIG>, in the electronic device <NUM>, the third shield portion <NUM> may cover, of side surfaces of the second substrate <NUM> and the third substrate <NUM>, at least a part exposed from the second shield portion, which will be described later. In the electronic device <NUM>, the third shield portion <NUM> may cover the flexible substrate <NUM> when viewed in a direction perpendicular to the stacking direction.

The third shield portion <NUM> may include a first leg portion <NUM> at an end on the side of the stacking direction, in other words, in a direction away from the first flat portion <NUM>. The first leg portion <NUM> may be parallel to the first flat portion <NUM>. The first leg portion <NUM> may overlap the first flat portion <NUM> when viewed in a direction perpendicular to the first flat portion <NUM>. As illustrated in <FIG>, inside the electronic device <NUM>, the third shield portion <NUM> may abut the heat conductor <NUM> at the first leg portion <NUM>.

The first metal plate <NUM> is a metal plate, in other words, a metal flat plate having a desired shape such as that illustrated in <FIG> and whose predetermined portions are bent. In <FIG>, straight lines to be bent on the surface side are indicated by dashed lines, and straight lines to be bent on the rear surface side are indicated by one-dot chain lines. When the bent portions of the first metal plate <NUM> are unbent into a flat shape, all of parts of the first metal plate <NUM> are thus separated from each other without interfering with each other. The first metal plate <NUM> may be made of, for example, a metal such as copper or the like having large thermal conductivity.

As illustrated in <FIG>, the second metal plate <NUM> includes a second flat portion <NUM> and a second shield portion <NUM>.

The second flat portion <NUM> has a flat shape. The second flat portion <NUM> may have a substantially rectangular shape wider than the first substrate <NUM>, the second substrate <NUM>, and the third substrate <NUM> and slightly narrower than the first flat portion <NUM>. As illustrated in <FIG> and <FIG>, in the electronic device <NUM>, the second flat portion <NUM> is interposed between the second substrate <NUM> and the third substrate <NUM>. In the electronic device <NUM>, the second flat portion <NUM> may have a main surface substantially parallel to main surfaces of the second substrate <NUM> and the third substrate <NUM>.

In the electronic device <NUM>, the second flat portion <NUM> directly or indirectly abuts the electronic component <NUM> mounted on the second substrate <NUM> and the electronic component <NUM> mounted on the third substrate <NUM>. In the electronic device <NUM>, the second flat portion <NUM>, for example, abuts the electronic component <NUM> mounted on the second substrate <NUM> indirectly via the heat dissipation sheet <NUM>. In the electronic device <NUM>, the second flat portion <NUM>, for example, abuts the electronic component <NUM> mounted on the third substrate <NUM> indirectly via the heat dissipation sheet <NUM>. The heat dissipation sheet <NUM> may be made of, for example, a soft material having shape followability, like filler-containing silicone rubber, and having relatively large thermal conductivity.

As illustrated in <FIG>, the second shield portion <NUM> includes a first one-side shield portion <NUM> and a second one-side shield portion <NUM>. The first one-side shield portion <NUM> stands, on one main surface of the second flat portion <NUM>, along at least a portion of the outer edge of the second flat portion <NUM>. The second one-side shield portion <NUM> stands, on the other main surface of the second flat portion <NUM>, along at least a portion of the outer edge of the second flat portion <NUM>.

For example, the first one-side shield portion <NUM> stands, on the side of one main surface (the upper side in <FIG>), along three sides except for one side of the second flat portion <NUM>. For example, the second one-side shield portion <NUM> stands, on the side of the other main surface (the lower side in <FIG>), along two mutually facing sides of the three sides along which the first one-side shield portion <NUM> stands on the side of the one main surface.

As illustrated in <FIG> and <FIG>, in the electronic device <NUM>, the second shield portion <NUM> covers at least portions of side surfaces of the second substrate <NUM> and the third substrate <NUM>. As illustrated in <FIG>, in the electronic device <NUM>, the second shield portion <NUM> may cover portions of side surfaces of the second substrate <NUM> and the third substrate <NUM> and expose other portions without covering the other portions.

As illustrated in <FIG>, the second one-side shield portion <NUM> may include a second leg portion <NUM> at an end on the side of the stacking direction, in other words, in a direction away from the second flat portion <NUM>. The second leg portion <NUM> may be parallel to the second flat portion <NUM>. The second leg portion <NUM> may overlap the second flat portion <NUM> when viewed in a direction perpendicular to the second flat portion <NUM>. As illustrated in <FIG>, inside the electronic device <NUM>, the second shield portion <NUM> may abut the heat conductor <NUM> at the second leg portion <NUM>.

The second metal plate <NUM> is a metal plate, in other words, a metal flat plate having a desired shape such as that illustrated in <FIG> and whose predetermined portions are bent. In <FIG>, straight lines to be bent on the surface side are indicated by dashed lines, and straight lines to be bent on the rear surface side are indicated by one-dot chain lines. When the bent portions of the second metal plate <NUM> are unbent into a flat shape, all of parts of the second metal plate <NUM> are thus separated from each other without interfering with each other. The second metal plate <NUM> may be made of, for example, a metal such as copper or the like having large thermal conductivity.

As illustrated in <FIG> and <FIG>, the second metal plate <NUM> may be positioned to be separated from the first metal plate <NUM> without being in contact with the first metal plate <NUM> at the all surfaces of the second metal plate <NUM>.

As illustrated in <FIG> and <FIG>, the heat conductor <NUM> is positioned on the side of the stacking direction from the first substrate <NUM>. The heat conductor <NUM> may be positioned on the side of the stacking direction from the third substrate <NUM>. In the electronic device <NUM>, the heat conductor <NUM> may abut the first metal plate <NUM> and the second metal plate <NUM>. As illustrated in <FIG>, the heat conductor <NUM> may abut the first metal plate <NUM> at the first leg portion <NUM>. As illustrated in <FIG>, the heat conductor <NUM> may abut the second metal plate <NUM> at the second leg portion <NUM>.

As illustrated in <FIG> and <FIG>, the heat conductor <NUM> may include a third metal plate <NUM> and a heat dissipation sheet <NUM>. The heat conductor <NUM> may abut the first metal plate <NUM> and the second metal plate <NUM> at the heat dissipation sheet <NUM>. The heat dissipation sheet <NUM> may abut the third metal plate <NUM> at a surface that differs from a surface that abuts the first metal plate <NUM> and the second metal plate <NUM>. The heat dissipation sheet <NUM> may be made of, for example, a soft material having shape followability, like filler-containing silicone rubber, and having relatively large thermal conductivity. In the electronic device <NUM>, the third metal plate <NUM> extends toward the side of the stacking direction more than the surface that abuts the first metal plate <NUM> and the second metal plate <NUM>. The third metal plate <NUM> may be made of, for example, a metal such as copper or the like having large thermal conductivity.

The imaging optical system <NUM> is constituted by an optical element such as a lens. The imaging optical system <NUM> is designed and formed to have predetermined values of optical characteristics such as angle of field, depth of field, and the like. The imaging optical system <NUM> forms an imaged subject image on a light receiving surface of the imaging element <NUM>.

As illustrated in <FIG>, the first housing <NUM> may have a rectangular cylindrical section. As illustrated in <FIG> and <FIG>, the first housing <NUM> may house the imaging optical system <NUM> with the optical axis of the imaging optical system <NUM> substantially coinciding with the axis of the first housing <NUM> and with the imaging optical system <NUM> being exposed from one opening. The first housing <NUM> may house the first substrate <NUM> such that the imaging element <NUM> is fixed in an orientation determined at a positioned that is determined relative to the imaging optical system <NUM>. The first housing <NUM> may house the second substrate <NUM>, the third substrate <NUM>, the first metal plate <NUM>, and the second metal plate <NUM> such that the above configuration is satisfied for the first substrate <NUM>.

As illustrated in <FIG>, the second housing <NUM> may have a shape including a flat part and a quadrangular prism that extends perpendicular to a main surface of the flat part. The second housing <NUM> may include the third metal plate <NUM> as the heat conductor <NUM>. The second housing <NUM> may include a fourth connector <NUM> that can be fitted to the third connector <NUM>. As illustrated in <FIG> and <FIG>, the second housing <NUM> may be sealed at the flat part to an opening of the first housing <NUM> at an end on a side opposite to an end on a side that exposes the imaging optical system <NUM>.

Next, a method of manufacturing the electronic device <NUM> will be described below.

As illustrated in <FIG>, the third substrate <NUM> is inserted into a space sp1 defined by the second flat portion <NUM> and the second one-side shield portion <NUM> of the second metal plate <NUM>. The third substrate <NUM> is inserted into the space sp1 from an outer edge side of the second flat portion <NUM> where the first one-side shield portion <NUM> is not provided. The third substrate <NUM> is inserted such that a main surface opposite to a main surface provided with the third connector <NUM> faces the second flat portion <NUM>. The third substrate <NUM> is inserted into the space sp1 from a side opposite to a side where the flexible substrate <NUM> is provided.

As illustrated in <FIG>, the third substrate <NUM> in the inserted state is stuck to the second flat portion <NUM>. The heat dissipation sheet <NUM> may be used to stick the third substrate <NUM> to the second flat portion <NUM>. As illustrated in <FIG>, the flexible substrate <NUM> is folded, and the second substrate <NUM> is stuck to the second flat portion <NUM>. The heat dissipation sheet <NUM> may be used to stick the second substrate <NUM> to the second flat portion <NUM>.

As illustrated in <FIG>, the second metal plate <NUM> to which the second substrate <NUM> and the third substrate <NUM> are stuck is inserted into a space sp2 defined by the first flat portion <NUM> and the third shield portion <NUM> of the first metal plate <NUM>. The second metal plate <NUM> is inserted such that the second substrate <NUM> faces the first flat portion <NUM>.

As illustrated in <FIG>, the second metal plate <NUM> is stuck to the first flat portion <NUM> via the second substrate <NUM> in a state in which the second connector <NUM> of the second substrate <NUM> is inserted into the opening op of the first flat portion <NUM>. The heat dissipation sheet <NUM> may be used to stick the second substrate <NUM> to the first flat portion <NUM>.

As illustrated in <FIG>, the second substrate <NUM> assembled to the first metal plate <NUM> and the second metal plate <NUM> is connected to the first substrate <NUM> by the second connector <NUM> being fitted to the first connector <NUM>. Before the connection, the first substrate <NUM> is fixed to a lens barrel <NUM> housing the imaging optical system <NUM> while a heat conduction member <NUM> such as a metal plate being interposed therebetween. For example, bonding with an adhesive, fastening with a screw, and the like are employed for fixation of the first substrate <NUM> to the lens barrel <NUM>.

As illustrated in <FIG>, the third substrate <NUM> is connected to the second housing <NUM> by the third connector <NUM> being fitted to the fourth connector <NUM> in a state in which the second substrate <NUM> is connected to the first substrate <NUM>. Thereafter, the first housing <NUM> is placed over the imaging optical system <NUM>, the first substrate <NUM>, the second substrate <NUM>, the third substrate <NUM>, the first metal plate <NUM>, and the second metal plate <NUM>. In the state in which the first housing <NUM> is placed, the first housing <NUM> is fixed to the second housing <NUM>, and the electronic device <NUM> is thereby manufactured. For example, welding, bonding with an adhesive, fastening with a screw, and the like are employed for fixation of the first housing <NUM> and the second housing <NUM>.

The electronic device <NUM> in the present embodiment with the above configuration includes the first flat portion <NUM> that is interposed between the first substrate <NUM> and the second substrate <NUM> and that indirectly abuts the imaging element <NUM> mounted on the first substrate <NUM> and the electronic component <NUM> mounted on the second substrate <NUM>. In the electronic device <NUM> with such a configuration, the imaging element <NUM> mounted on the first substrate <NUM> and the electronic component <NUM> mounted on the second substrate <NUM>, which are heat sources, are close to the first flat portion <NUM>, which generally has thermal conductivity higher than that of the heat dissipation sheet <NUM>. Thus, heat dissipation properties are improved compared with a configuration in which only the heat dissipation sheet <NUM> is interposed. In addition, the electronic device <NUM> includes the second flat portion <NUM> that is interposed between the second substrate <NUM> and the third substrate <NUM> and that indirectly abuts the electronic component <NUM> mounted on the second substrate <NUM> and the electronic component <NUM> mounted on the third substrate <NUM>. In the electronic device <NUM> with such a configuration, the electronic component <NUM> mounted on the second substrate <NUM> and the electronic component <NUM> mounted on the third substrate <NUM>, which are heat sources, are close to the second flat portion <NUM>, which generally has heat dissipation properties higher than that of the heat dissipation sheet <NUM>. Thus, heat dissipation properties are improved compared with a configuration in which only the heat dissipation sheet <NUM> is interposed.

The electronic device <NUM> according to the present embodiment further includes the first shield portion <NUM> that covers the entire circumference of the side surface of the first substrate <NUM>. With such a configuration, the electronic device <NUM> can have shielding properties with respect to radiation noise of the first substrate <NUM> or the electronic component <NUM> mounted on the first substrate <NUM>. In addition, the electronic device <NUM> includes the second shield portion <NUM> that covers at least portions of the side surfaces of the second substrate <NUM> and the third substrate <NUM>. With such a configuration, the electronic device <NUM> can have shielding properties with respect to radiation noise of the electronic component <NUM> mounted on the second substrate <NUM> and the electronic component <NUM> mounted on the third substrate <NUM>.

In the electronic device <NUM> according to the present embodiment, the first metal plate <NUM> includes the first flat portion <NUM> and the first shield portion <NUM>. In addition, in the electronic device <NUM>, the second metal plate <NUM> includes the second flat portion <NUM> and the second shield portion <NUM>. In the electronic device <NUM> with such a configuration, the first flat portion <NUM> and the first shield portion <NUM> having the above configuration and the second flat portion <NUM> and the second shield portion <NUM> having the above configuration can be manufactured in a simple configuration without being subjected to steps of welding and the like.

Therefore, as described above, the electronic device <NUM> according to the present embodiment can further improve heat dissipation properties with a simple configuration while having shielding properties with respect to radiation noise.

In the electronic device <NUM> according to the present embodiment, the first metal plate <NUM> and the second metal plate <NUM> are positioned to be separated from each other. With such a configuration, the electronic device <NUM> can reduce heat conduction between the first metal plate <NUM> and the second metal plate <NUM> compared with a configuration in which the first metal plate <NUM> and the second metal plate <NUM> abut each other. Thus, in a configuration in which one of the first metal plate <NUM> and the second metal plate <NUM> is close to a component that is to be greatly affected by a high temperature, the electronic device <NUM> can reduce heat conduction from the other one to the one even when the temperature of the other one is increased.

In the electronic device <NUM> according to the present embodiment, the second shield portion <NUM> covers portions of the side surfaces of the second substrate <NUM> and the third substrate <NUM>, and the third shield portion <NUM> of the first metal plate <NUM> covers at least a part exposed from the second shield portion <NUM>. With such a configuration, the electronic device <NUM> can have shielding properties with respect to radiation noise of the electronic component <NUM> mounted on the second substrate <NUM> and the electronic component <NUM> mounted on the third substrate <NUM> while enabling the second substrate <NUM> and the third substrate <NUM> to be easily stuck to the second metal plate <NUM>, even in a configuration in which the second substrate <NUM> and the third substrate <NUM> are connected to each other by a wire or the like, such as the flexible substrate <NUM>, extending from the side surfaces of the second substrate <NUM> and the third substrate <NUM>.

In the electronic device <NUM> according to the present embodiment, the flexible substrate <NUM> that connects the second substrate <NUM> and the third substrate <NUM> to each other is covered by the third shield portion <NUM>. With such a configuration, the electronic device <NUM> can suppress degradation of shielding properties with respect to radiation noise of the electronic component <NUM> mounted on the second substrate <NUM> and the electronic component <NUM> mounted on the third substrate <NUM> while using the flexible substrate <NUM> that contributes to easy manufacture and a reduction in manufacturing costs.

The electronic device <NUM> according to the present embodiment includes the heat conductor <NUM> that is positioned on the side of the stacking direction from the first substrate <NUM> and that abuts the first metal plate <NUM> and the second metal plate <NUM>. With such a configuration, the electronic device <NUM> can conduct heat generated at the electronic component <NUM> mounted on the first substrate <NUM>, the electronic component <NUM> mounted on the second substrate <NUM>, and the electronic component <NUM> mounted on the third substrate <NUM> toward the stacking direction. Thus, even in a configuration in which a component that is to be greatly affected by a high temperature, as with the imaging optical system <NUM> made of a resin, is positioned in a direction opposite the stacking direction, the electronic device <NUM> can suppress a heat increase of the component.

In the electronic device <NUM> according to the present embodiment, the third shield portion <NUM> and the second shield portion <NUM> abut the heat conductor <NUM> at the first leg portion <NUM> and the second leg portion <NUM>, respectively. With such a configuration, the electronic device <NUM> according to the present embodiment can increase an area of contact between each of the first metal plate <NUM> and the second metal plate <NUM>, and the heat conductor <NUM>. Thus, the electronic device <NUM> can improve conduction of the heat generated at the electronic component <NUM> mounted on the first substrate <NUM>, the electronic component <NUM> mounted on the second substrate <NUM>, and the electronic component <NUM> mounted on the third substrate <NUM> to the heat conductor <NUM>.

In the electronic device <NUM> according to the present embodiment, the first substrate <NUM> and the second substrate <NUM> are electrically connected to each other via the first connector <NUM> inserted into the opening op provided in the first flat portion <NUM>, and the second connector <NUM>. With such a configuration, the electronic device <NUM> can allow formation of the first shield portion <NUM> and the third shield portion <NUM> that cover the entirety of the side surface of at least one of the first substrate <NUM> and the second substrate <NUM>. Therefore, the electronic device <NUM> can cover the entire circumference of the side surface of at least one of the first substrate <NUM> and the second substrate <NUM> by using the single first metal plate <NUM> without using a plurality of metal plates.

Claim 1:
An electronic device (<NUM>) comprising:
a first substrate (<NUM>), a second substrate (<NUM>), and a third substrate (<NUM>) on each of which an electronic component (<NUM>) is mounted, the first substrate (<NUM>), the second substrate (<NUM>), and the third substrate (<NUM>) being positioned in order toward a stacking direction with respective main surfaces facing each other;
a first metal plate (<NUM>) including
a first flat portion (<NUM>) that is interposed between the first substrate (<NUM>) and the second substrate (<NUM>) and that directly or indirectly abuts the electronic component (<NUM>) mounted on the first substrate (<NUM>) and the electronic component (<NUM>) mounted on the second substrate (<NUM>), and
a first shield portion (<NUM>) that covers an entire circumference of a side surface of the first substrate (<NUM>); and
a second metal plate (<NUM>) including
a second flat portion (<NUM>) that is interposed between the second substrate (<NUM>) and the third substrate (<NUM>) and that directly or indirectly abuts the electronic component (<NUM>) mounted on the second substrate (<NUM>) and the electronic component (<NUM>) mounted on the third substrate (<NUM>), and
a second shield portion (<NUM>) that covers at least portions of side surfaces of the second substrate (<NUM>) and the third substrate (<NUM>).