Electronic apparatus and method for manufacturing the same

An electronic apparatus has a wiring board and connector units which are mounted at a case unit. The connector unit has an external connection surface connected with the external and a terminal installation surface, which is substantially flat and positioned at an opposite side to the external connection surface. A terminal of the connector unit is electrically connected with a pad positioned at a first surface of the wiring board via a connection member. The wiring board and the connector unit which are integrated are mounted at the case unit, with the first surface and the terminal installation surface facing the case unit. The case unit has an installation surface at which a recess for accommodating therein the connection member is arranged.

CROSS REFERENCE TO RELATED APPLICATION

This application is based on a Japanese Patent Application No. 2005-115625 filed on Apr. 13, 2005, the disclosure of which is incorporated herein by reference.

FIELD OF THE INVENTION

The present invention relates to an electronic apparatus and a method for manufacturing the same, in which a wiring board and a connector unit for an external connection are electrically connected with each other via a connection member and mounted at a case unit.

BACKGROUND OF THE INVENTION

Generally, an electronic apparatus is provided with a wiring board, connector units (for external connection) arranged at the periphery of the wiring board, connection members for electrically connecting the wiring board with the connector units, and a case unit at which the wiring board and the connector units are mounted.

Recently, it is preferable for the wiring board to be miniaturized, that is, a connection space for the connection between the wiring board and the connector unit to be reduced, in order to small-size (high-density package) the electronic apparatus.

In the conventional electronic apparatus, the wiring board and the connector unit are connected with each other through the connection member such as a bonding wire, after the wiring board and the connector unit are mounted at the case unit.

However, if the connection space for the connection between the wiring board and the connector units is narrowed, a connection device and a connection jig will interfere with components adjacent thereto when performing the connection operation. Therefore, it is difficult to small-size and high-density package the electronic apparatus.

The interference in the connection via the connection member will be described with reference toFIGS. 7 and 8.

As shown inFIG. 7, an electronic apparatus as a first comparison example is provided with a case unit10having an opening portion11, whose bottom surface functions as a mounting surface12. A wiring board20and connector units30for an external connection are mounted at the mounting surface12. A surface11aof the edge of the opening portion11is a mounting surface, through which the electronic apparatus is attached to an attachment member (not shown).

Electronic components24,25, and pads23connected with a bonding wire40(as connection member) are mounted at the wiring board20. The connector units30are arranged at the periphery of the wiring board20.

The connector unit30of the side of an external connection surface32is connected with an external wiring member such as wire harness. The connector unit30made of resin is provided with a terminal31which is connected with the bonding wire40and constructed by insert-molding.

In the connector unit30, a surface opposite to the external connection surface32functions as a terminal installation surface33on which the terminal31is provided. The terminal31and the pad23of the wiring board20are electrically connected with each other via the bonding wire40.

In this case, as shown inFIG. 7, both the pad23of the wiring board20and the terminal31of the connector unit30are arranged at an opposite side of the wiring board20to the mounting surface12of the case unit10. That is, the pad23and the terminal31do not face the mounting surface12of the case unit10. In this state, the wiring board20and the connector units30are mounted at the mounting surface12of the case unit10, and thereafter the connection via the bonding wire40, that is, the wire bonding is performed.

However, in this case, a bonder300of a wire bonding device interferes with a sidewall of the case unit10, so that the wire bonding becomes difficult.

In the case with reference toFIG. 7, after performing the fist bonding at the pad23of the wiring board20, the second bonding is performed at the terminal31of the connector unit30. Thereafter, when the bonder300is made step back in order to cut the wire40, the bonder300will interfere with the sidewall of the case unit10.

In order to prevent the interference, it is necessary to enlarge a distance L1between the terminal31and the case unit10to widen a connection space. As a result, the electronic apparatus becomes large. Therefore, it is difficult to small-size the electronic apparatus in this case.

On the other hand, even when the first bonding is performed at the side of the terminal31, the interference of the bonder300similarly to what is described above will occur in the case where the distance L1between the terminal31and the case unit10is small.

Referring toFIG. 8, an electronic apparatus as a second comparison example has a case unit10with a substantial flat-plate shape. A first surface of the case unit10is used as a mounting surface12. A wiring board20and connector units30are mounted at the mounting surface12. The case unit10has a second surface (at opposite side to mounting surface12), at which the electronic apparatus is attached to an attachment member (not shown).

Similarly to the case ofFIG. 7, electronic components24,25and pads23are arranged on the wiring board20. Moreover, the connector units30are arranged at the periphery of the wiring board20.

Referring toFIG. 8, both an external connection surface32and a terminal installation surface33of the connector unit30are positioned at the side (of connector unit30) opposite to the mounting surface12of the case unit10. That is, the external connection surface32and the terminal installation surface33do not face the mounting surface12. Therefore, a part (in vicinity of terminal31) of the connector unit30of the side of the external connection surface32will interfere with the bonder300. That is, an interference between the bonder300of the wire bonding device and the connector unit30is caused, so that the wire bonding becomes difficult.

In this case, after the first bonding is performed at the terminal31of the connector unit30, the second bonding is performed at the pad23of the wiring board20. In performing the first bonding, the bonder300interferes with the connector unit30.

In order to prevent the interference, it is necessary to enlarge a distance L2between the terminal31and the external connection surface32of the connector unit30to widen a connection space. Thus, the size of the electronic apparatus becomes large, so that the miniaturization thereof becomes difficult. The interference occurs similarly in the case where the first bonding is performed at the side of the pad23inFIG. 8.

As described above, in the electronic apparatuses shown inFIG. 7andFIG. 8, the interference of the bonding device is caused in the wire bonding. The electronic apparatus will become large, if the distance between the bonding device and the interfering element such as the case unit and the connector unit is enlarged in order to ensure a sufficient connection space.

The above-described problem is not only caused in the case where the connection between the wiring board and the connector unit is established via the wire bonding, but also caused in the case where a flexible printed circuit board is used as the connection member. In this case, a pressing/heating jig for the connection interferes with the above-described interfering elements.

Therefore, according to the conventional electronic apparatus (referring to first and second comparison examples), there exits a trade-off relationship between realization of a sufficient connection space and realization of a miniaturization of the electronic apparatus, so that it is difficult to satisfy these requirements simultaneously.

SUMMARY OF THE INVENTION

In view of the above-described disadvantages, it is an object of the present invention to provide an electronic apparatus in which a wiring board and a connector unit are electrically connected with each other via a connection member and mounted at a case unit. The electronic apparatus is small-sized while being provided with a sufficient connection space, by restricting an interference in a connection between the wiring board and the connector unit.

According to an aspect of the present invention, an electronic apparatus has a wiring board, at least one connector unit for a connection with an external, at least one connection member for electrically connecting the wiring board with the connector unit, and a case unit at which the wiring board and the connector unit are mounted. The connector unit is arranged at a periphery of the wiring board. The connector unit has an external connection surface connected with the external and a terminal installation surface, which is substantially flat and positioned at an opposite side to the external connection surface. The connector unit has a terminal, which is installed at the terminal installation surface and connected with the connection member. The wiring board has at least one pad positioned at a first surface of the wiring board. The pad is connected with the connection member so that the pad and the terminal are electrically connected with each other via the connection member. The wiring board and the connector unit are integrally connected with each other. The wiring board and the connector unit which are integrated are mounted at the case unit, with the first surface of the wiring board and the terminal installation surface of the connector unit facing the case unit. The case unit has an installation surface at which at least one recess for accommodating therein the connection member is arranged. The wiring member and the connector unit are mounted at the installation surface.

According to another aspect of the present invention, a method is provided for manufacturing an electronic apparatus which has a wiring board and at least one connector unit positioned at a periphery of the wiring board. The wiring board and the connector unit are electrically connected with each other via a connection member and mounted at a case unit. The method includes a preparing process, an integrating process, an electrically connecting process and a mounting process. At the preparing process, the connector unit is provided with a terminal and has a terminal installation surface and an external connection surface for a connection with an external. The terminal installation surface is substantially flat and positioned at an opposite side to the external connection surface. The terminal is mounted at the terminal installation surface and connected with the connection member. Moreover, the wiring board is prepared to have at least one pad positioned at a first surface of the wiring board and connected with the connection member. Furthermore, the case unit is prepared to have at least one recess for accumulating therein the connection member. The recess is concaved from an installation surface of the case unit where the wiring board and the connector unit are mounted. At the integrating process, the wiring board and the connector unit are integrated, with the first surface of the wiring board and the terminal installation surface of the connector units facing a same direction. At the electrically connecting process, the pad is electrically connected with the terminal via the connection member. At the mounting process, the wiring board and the connector unit are mounted at the case unit, with the first surface of the wiring board and the terminal installation surface of the connector unit facing the case unit and with the connection member being arranged into the recess.

Thus, the electronic apparatus according to the present invention can be properly provided. In this case, the wiring board and the connector unit can be electrically connected with each other via the connection member. The connection member is connected to the wiring board and the connector unit having been integrated, and the connection therebetween can be performed in a state where the interference element (e.g., case unit) occurring in a conventional electronic apparatus is prevented.

Moreover, the connector unit has the external connection surface and the terminal installation surface, which is substantially flat and positioned at the opposite side to the external connection surface. Therefore, the part of the connector unit of the side of the external connection surface will not become an interference element in the connection performed at the terminal.

Furthermore, as contrary to the comparison example, according to the present invention, the pad and the terminal are respectively arranged at the surface (of wiring board) and the surface (of connector unit) which face the case unit, and the bonding wire is provided for the electrical connection among the wiring board and the connector units. Since the case unit is provided with the recess capable of housing the bonding wire, the bonding wire can be restricted from interfering with the case unit.

Therefore, in the electronic apparatus where the wiring board and the connector units are electrically connected with each other through the bonding wire and mounted at the case unit, the interference (obstruction) in the connection of the wiring board with the connector unit can be restricted. Thus, the electronic apparatus can be small-sized while a sufficient connection space can be provided.

DETAILED DESCRIPTION OF THE EXAMPLE EMBODIMENTS

An electronic apparatus100according to a preferable embodiment of the present invention will be described with reference toFIGS. 1–3. The electronic apparatus100can be suitably used for an engine ECU or the like. In this case, referring toFIG. 1, the electronic apparatus100can be attached to an attachment member200of an engine room of a vehicle, for example.

As shown inFIG. 1, the electronic apparatus100is mainly constructed with a wiring board20, at least one connector unit30(e.g., two connector units30as shown inFIG. 1) through which the electronic apparatus100is connected with the external, at least one connection member40(e.g., two connection members40as shown inFIG. 1) for electrically connecting the wiring board20with the connector unit30, and a case unit10at which the wiring board20and the connector unit30are mounted. In this embodiment, the connection member40is constructed of a bonding wire made of gold, aluminum, or the like. The connector unit30is arranged at the periphery of the wiring board20.

The electronic apparatus100is attached to the attachment member200, by fixing the case unit10to the attachment member200by screw units, cementing, or the like.

The case unit10is made of, for example, a metal such as aluminum, ferrous metal and the like. The case unit10has therein a space defined by a sidewall portion and an end portion (e.g., bottom portion with respect to up-down direction inFIG. 1) of the case unit10. The case unit10has an opening11, which is positioned at an opposite side (e.g., top side with respect to up-down direction inFIG. 1) of the case unit10to the end portion thereof. That is, the opening11is defined by the sidewall portion of the case unit10. An inner surface of the end portion of the case unit10is used as a mounting surface12, at which the wiring board20and the connector unit30are mounted. The wiring board20can be constructed of a ceramic substrate, a printed circuit board, or the like.

Referring toFIG. 1, a first surface21(e.g., lower surface) of the wiring board20is arranged to face the mounting surface12of the case unit10. The wiring board20is fixed to the mounting surface12via an adhesive or the like (not shown).

At least one pad23(e.g., two pads) is arranged at the first surface21of the wiring board20. The pad23, being connected with the bonding wire40(connection member), is made of a metal such as iron, copper and the like. The pad23is electrically and mechanically connected with the wiring board20via solder, conductive adhesive, Ag paste, or the like.

Electronic components24and25(e.g., microcomputer and resistive element) are installed on a second surface22(i.e., upper surface) of the wiring board20. The second surface22is positioned at an opposite side of the wiring board20to the first surface21thereof. The electronic components24and25can be attached to the wiring board20through solder, conductive adhesive, bonding wire or the like. Other electronic components, for example, an IC chip, a capacitor and the like can be also installed at the wiring board20.

The pad23which is arranged at the first surface21of the wiring board20is electrically connected with a wiring part (not shown) and the electronic components24,25which are arranged at the second surface22via an through hole (not shown). The connector unit30is arranged at the periphery of the wiring board20.

The connector unit30is made of a resin or the like and integrated with a terminal31by an insertion molding, for example. The terminal31is made of a metal having an excellent conductivity, for example, a copper metal or the like.

An external connection surface32(e.g., upper end surface referring toFIG. 1) of the connector unit30is connected to the external. In this case, an external wiring member such as wire harness and the like is connected to the side of the external connection surface32(e.g., upper end surface) by engagement or the like. A terminal installation surface33(e.g., lower end surface referring toFIG. 1) of the connector unit30is substantially flat, and arranged at the opposite side to the external connection surface32. The terminal31is connected with the bonding wire40, which is used as the connection member.

In this case, the connector unit30is integrated with the terminal31which has a substantial plate or rod shape, by resin insertion-molding. The terminal31can have a bend shape, for example. One end of the terminal31is attached to (contacts) the terminal installation surface33of the connector unit30. The terminal31extends from the terminal installation surface33toward the side of the external connection surface32of the connector unit30, so that the other end of the terminal31is exposed to an opening formed at the side of the external connection surface32. Thus, the other end of the terminal31is connectable with the external wiring member and the like. In this case, the terminal31penetrates an end portion (which has terminal installation surface33as bottom surface with reference toFIG. 1) of the connector unit30, so that the two ends of the terminal31are respectively arranged at two sides of the end portion of the connector unit30.

The pad23of the wiring board20and the terminal31of the connector unit30are connected with the bonding wire40to be electrically continuous. A board mounting portion34of the connector unit30is connected with the wiring board20(e.g., end portion thereof) by bonding (through silicon system adhesive or the like), or engagement fixing, or welding fixing between the connector unit30and the wiring board20, or the like. Thus, the wiring board20and the connector units30are integrated.

In this case, both the first surface21of the wiring board20and the terminal installation surface33of the connector units30are arranged to face the same direction.

According to this embodiment, as shown inFIG. 1, the wiring board20and the connector unit30are mounted at the case unit10so that both the first surface21and the terminal installation surface33face the mounting surface12of the case unit10. On the other hand, according to the above-described comparison examples (referring toFIGS. 7 and 8), the first surface21of the wiring board20and the terminal installation surface33of the connector units30are arranged at an opposite side of the wiring board20to the mounting surface12of the case unit10.

In this embodiment, the first surface21of the wiring board20and a case mounting portion35of the connector unit30are fixed to the mounting surface12of the case unit10, for example, by bonding through a silicon adhesive or the like (referring toFIG. 2Cwhich will be described later).

Furthermore, as shown inFIG. 1, the mounting surface12where the wiring board20and the connector units30are mounted is provided with at least one recess13, which is dented with respect to the mounting surface12. The bonding wire40(connection member) is housed in the recess13. Therefore, the first surface21of the wiring board20contacts the mounting surface12except the recess13of the case unit10.

Moreover, the terminal installation surface33of the connector unit30is provided with an interference-restricting protrusion portion36, which extends into the recess13of the case unit10and protrudes to the side of the case unit10more than the bonding wire40. That is, the interference-restricting protrusion portion36is more adjacent to the side of the attachment member200(where the case unit10is arranged) than the bonding wire40.

The interference-restricting protrusion portion36is arranged to contact the case unit10earlier than the bonding wire40so that the interference between the bonding wire40and the case unit10can be restricted. The interference-restricting protrusion portion36has a thin pin shape or the like not to become an interfering element in a later-described wire bonding, and is arranged to keep out of a movable area of a bonder300.

A lid portion50is attached to the connector unit30, to cover the second surface22(i.e., upper surface) of the wiring board20and the electronic components24,25, which are mounted at the second surface22. The lid portion50is made of a metal, a resin, a ceramic, or the like, and fixed to the connector unit30by engagement, press fit or the like.

The connector unit30is provided with a stopper37for positioning the lid portion50. The stopper37is positioned between the external connection surface32and the terminal installation surface33of the connector unit30. The lid portion50has at least hole which is shaped and positioned corresponding to the connector unit30. The lid portion50rings the connector unit30from the side of the external connection surface32through the hole, so that the lid portion50is attached to the connector unit30. That is, the hole is engaged with the connector unit30. The lid portion50will be stopped by the positioning stopper37when contacting therewith. That is, the lip portion50is positioned by the positioning stopper37.

The lid portion50blocks the opening11of the case unit10and protects the wiring board20, the electronic components24,25, the connector units30, the bonding wire40and the like inside the case unit10. In this case, the end portion of the connector unit30of the side of the external connection surface32protrudes through the lid portion50, so that the connector unit30can be connected to the external wiring member and the like through the end portion thereof.

As describe above, the electronic apparatus100is attached to the attachment member200with an intermediary of the case unit10. In this case, the wiring board20and the electronic components24,25mounted at the wiring board20are electrically communicated with the exterior via the bonding wire40and the connector30.

Next, the manufacturing method of the electronic apparatus100according to this embodiment will be described with reference toFIGS. 2A–2C, where the interference-restricting protrusion portion36and the positioning stopper37are not shown.

At a preparing process, the connector unit30is prepared. The connector unit30is provided with the external connection surface32(which is to be connected to external) and the flat-shaped terminal installation surface33(opposite to external connection surface32), where the terminal31is attached. Moreover, the wiring board20is prepared. The wiring board20is provided with the pad23mounted at the first surface21of the wiring board20. The electronic components24,25are installed at the second surface22of the wiring board20. Further, the case unit10is prepared to have the recess13concaved from the mounting surface12thereof.

According to the comparison examples, the wire bonding is performed after the wiring board20and the connector unit30are mounted at the case unit10. According to this embodiment, firstly, the wiring board20and the connector unit30are integrated, and the wire bonding therebetween is performed. Thereafter, the integrated unit of the wiring board20and the connector unit30is attached to the case unit10.

That is, as shown inFIG. 2A, the wiring board20and the connector units30are integrally connected to each other, with both the first surface21of the wiring board20and the terminal installation surface33being directed to the same direction (board-connector integrating process).

Next, as shown inFIG. 2B, the pad23and the terminal31are electrically connected with the bonding wire40(wire bonding process). For the wire bonding, the integral unit of the wiring board20and the connector units30are mounted and held on a support surface331of a support stage330(used for wire bonding). The wire bonding is performed through the bonder300of a bonding machine.

The bonder300is constructed of a bonder head310for pressing the bonding wire40and a wire guide320for guiding the wire40. The bonder head310and the wire guide320are integrally movable.

In this case, the bonder300is positioned at the upper side of the bonding surface of the pad23of the wiring board20, and the first bonding is performed thereat. Thereafter, the bonder300is moved to the upper side of the terminal31of the connector unit30to route the wire40, and the second bonding is performed thereat. Then, the bonder300is made step back to cut the wire40.

Alternatively, the first bonding can be also performed at the side of the terminal31, and the second bonding can be also performed at the side of the pad23. In the wire bonding, because neither the case unit10nor the connector unit30exists as an interfering element, the bonder300will not be obstructed.

After the performing of the wire bonding, as shown inFIG. 2C, the wiring board20and the connector unit30are mounted at the case unit10, with both the first surface21(of wiring board20) and the terminal installation surface33(of connector units30) facing to the case unit10and with the bonding wire40being arranged into the recess13(case mounting process).

In this case, as shown inFIG. 2C, the mounting surface12of the case unit10is provided with an adhesive60applied to a position where the first surface21of the wiring board20is to contact the mounting surface12, and a position where the case mounting portion35of the connector unit30is to contact the mounting surface12.

The adhesive60is arranged in an adhesive reservoir portion61. The adhesive reservoir portion61is a slot and provided at the position of the mounting surface12where the adhesive60is applied. The depth of the adhesive reservoir portion61is set, for example, in a substantial range from 0.1 mm to 0.5 mm, and preferably set as 0.2 mm or so.

After the wiring board20and the connector unit30are mounted at the case unit10with the adhesive60therebetween, the adhesive60is heated and hardened. Thus, the wiring board20and the connector units30are fixed to the case unit10by bonding. Thereafter, the lid portion50is attached to the connector unit30. Thus, the manufacture of the electronic apparatus100shown inFIG. 1is completed.

Alternatively, as shown inFIG. 3, the attachment of the lid portion50can be also performed before the wiring board20and the connector units30are attached to the case unit10.

According to this embodiment, the electronic apparatus100is provided with the wiring board20, the connector unit30which is arranged at the periphery of the wiring board20for the external connection, the bonding wire40which is used as the connection member for electrically connecting the wiring board20with the connector unit30, and the case unit10where the wiring board20and the connector units30are mounted. Next, the characteristics of the electronic apparatus100will be described.

The connector unit30is constructed to have the terminal installation surface33which is substantially flat and opposite to the external connection surface32. The terminal31, to which the bonding wire40is connected, is attached to the terminal installation surface33.

The pad23which is connected with the bonding wire40is arranged at the first surface21of the wiring board20. The pad23and the terminal31are electrically connected with each other via the bonding wire40.

The wiring board20and the connector unit30are integrally connected with each other. The wiring board20and the connector unit30which are integrated is mounted at the case unit10, with both the first surface21of the wiring board20and the terminal installation surface33of the connector unit30facing the case unit10.

The recess13for accumulating the bonding wire40is arranged at the mounting surface12which is provided for the mounting of the wiring board20and the connector units30.

According to this embodiment, the above-described manufacturing method is provided for the electronic apparatus100, in which the connector unit30is arranged at the periphery of the wiring board20, the wiring board20and the connector unit30are electrically connected with each other via the bonding wire40(as connection member), and the wiring board20and the connector unit30are mounted at the case unit10.

The manufacturing method of the electronic apparatus100includes the preparing process, the integrating process, an electrically connecting process (e.g., wire bonding process), and the mounting process.

At the preparing process, what is prepared as the connector unit30is provided with the terminal installation surface33which is substantially flat and opposite to the external connection surface32(which can be connected to external), and the terminal31where the bonding wire40is connected is attached to the terminal installation surface33. Moreover, what is prepared as the wiring board20is provided with the pad23which is positioned at the first surface21and connected with the bonding wire40. Furthermore, what is prepared as the case unit10is provided with the recess13, which is capable of accumulating the bonding wire40and formed at the mounting surface12for the wiring board20and the connector unit30.

At the integrating process, the wiring board20and the connector unit30are integrally connected with each other, with the first surface21of the wiring board20and the terminal installation surface33of the connector units30facing the same direction.

At the electrically connecting process, the pad23and the terminal31are electrically connected with each other via the bonding wire40, in the integral unit of the wiring board20and the connector unit30.

At the mounting process, the wiring board20and the connector unit30are mounted at the case unit10, with both the first surface21of the wiring board20and the terminal installation surface33of the connector units30facing the case unit10and with the bonding wire40being arranged into the recess13.

According to the manufacturing method of this embodiment, the electronic apparatus100having the above-described characteristics can be manufactured properly.

Thus, according to the electronic apparatus100which can be manufactured by this manufacturing method, the electrical connection among the multiple connector units30and the electrical connection between the connector unit30and the wiring board20can be performed by the bonding wire40positioned between the connector unit30and the wiring board20which are integrated. In the electrical connection, the case unit10will not become an interfering element. That will occur in the comparison example.

Moreover, because the connector unit30is provided with the terminal installation surface33which is substantially flat and opposite to the external connection surface32connected to the external, the part of the connector unit30of the side of the external connection surface32will not become an interfering element.

Moreover, in this embodiment, as contrary to the comparison example, the pad23and the terminal31are respectively arranged at the surface21(of wiring board20) and the surface33(of connector unit30) which face the case unit10, and the bonding wire40is provided for the electrical connection among the wiring board20and the connector units30. Since the case unit10is provided with the recess13capable of housing the bonding wire40, the bonding wire40can be restricted from interfering with the case unit10.

Thus, according to the electronic apparatus100and the manufacturing method thereof of this embodiment, the wiring board20and the connector units30are electrically connected with each other through the bonding wire40, and mounted at the case unit10. Therefore, the interference (obstruction) in the connection of the wiring board20with the connector unit30can be restricted. Thus, the electronic apparatus100can be small-sized while a sufficient connection space can be ensured.

Moreover, according to this embodiment, the electronic apparatus100is provided with the interference-restricting protrusion portion36which protrudes from the terminal installation surface33into the recess13of the case unit10so that the tip thereof is more adjacent to the side of the case unit10than the bonding wire40. Therefore, the interference between the bonding wire40and the case unit10is restricted by the interference-restricting protrusion portion36.

Thus, the deformation and the short circuit of the bonding wire40due to the interference (contact) with the case unit10can be restricted, in the case where the wiring board20and the connector unit30are mounted at the case unit10with the bonding wire40being arranged into the recess13.

Furthermore, in the electronic apparatus100according to this embodiment, the electronic components24,25are mounted on the other surface22which is positioned at the opposite side of the wiring board20to the first surface21, and the first surface21of the wiring board20contacts the part of the case unit10other than the recess13arranged thereat.

Accordingly, heat generated by the electronic components24,25can be radiated from the wiring board20through the case unit10. Thus, the heat radiation performance is improved.

FIG. 4shows a first modification of the preferable embodiment. As shown inFIG. 4, a flexible printed circuit board41is used as the connection member for electrically connecting the pad23of the wiring board20and the terminal31of the connector unit30, to be substituted for the bonding wire40(referring toFIG. 1).

According to the first modification, the connection process via the flexible printed circuit board41is performed after the board-connector integrating process.

In the connection process, the flexible printed circuit board41is made contact the pad23and the terminal31, and pressed thereto by a heating/pressing jig340. Thus, the pad23and the terminal31are electrically connected with each other through the flexible printed circuit board41. In this case, neither the case unit10nor the connector units30exist as an interfering element. Therefore, the interference with the heating/pressuring jig340can be prevented.

Thereafter, similarly to what is described above in the preferable embodiment, the wiring board20and the connector units30are mounted at the case unit10, with both the first surface21(of wiring board20) and the terminal installation surface33(of connector units30) facing to the case unit10and with the bonding wire40being arranged into the recess13. Thereafter, the lid portion50is attached to the connector unit30. Thus, the manufacture of the electronic apparatus100is completed.

According to a second modification of the preferable embodiment, referring toFIG. 5, the pad23of the wiring board20and the terminal31of the connector unit30are connected with each other by soldering through a solder42, instead of the bonding wire40(referring toFIG. 1).

According to a third modification of the preferable embodiment, referring toFIG. 6, the pad23of the wiring board20and the terminal31of the connector unit30are connected with each other via a press-contacting connector43, instead of the bonding wire40(referring toFIG. 1).

In this case, the connector unit30and the wiring board20, which are integrated, are attached to the case unit10, where the press-contacting connector43has been disposed in the recess13of the case unit10. Thus, the fixing of the wiring board20and the connector units30to the case unit10and the connection of the press-contacting connector43with the pad23and the terminal31can be performed simultaneously.

As described above, the electronic components24,25are installed at the second surface22of the wiring board20. However, the electronic components24,25can be also installed at the first surface21(of wiring board20) which faces the case unit10. In this case, a recess or the like is arranged at the mounting surface12(which faces electronic components24,25) to accumulate the electronic components24,25, so that the electronic components24,25do not interfere with the case unit10.

The lid portion50can be also omitted when being unnecessary.

Moreover, the wiring board20may be arbitrary as long as the pad23is provided at the first surface21facing the case unit10, and may be not provided with the electronic components installed thereat. Furthermore, the electronic components of the present invention are not limited to those of the illustrated examples.

Furthermore, the connector unit30is not limited to that of the above-mentioned illustrated example, as long as the connector unit30is constructed in such a way that the terminal installation surface33having the substantially flat shape is at the opposite side of the connector unit30to the external connection surface32and the terminal31is provided at the terminal installation surface33. Moreover, the shape of the case unit10is not limited to that of the above-mentioned illustrated example.

The electronic apparatus100of the present invention has significant constructions including: that the wiring board20and the connector units30are integrated and attached to face the case unit10, that the pad23and the terminal31which are respectively arranged at the surfaces21and33(of wiring board20and terminal31) facing the case unit10are connected with each other through the connection member40, and that the case unit10is provided with the recess13capable of accumulating therein the connection member40,41,42or43. The parts of the electronic apparatus other than the significant constructions can be provided with an appropriate design alteration.

Such changes and modifications are to be understood as being in the scope of the present invention as defined by the appended claims.