Electronic apparatus

According to one embodiment, an electronic apparatus includes a housing, a board in the housing, a pad on the board, and a component. The pad includes a first portion and a second portion. The second portion includes a protrusion toward the first portion. The component includes a first electrode connected to the first portion and a second electrode connected to the second portion.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is based upon and claims the benefit of priority from prior Japanese Patent Application No. 2011-058438 filed Mar. 16, 2011, the entire contents of which are incorporated herein by reference.

FIELD

Embodiments described herein relate generally to electronic apparatuses.

BACKGROUND

There is provided a board that suppresses the positional deviation of a surface-mounted component.

DETAILED DESCRIPTION

In general, according to one embodiment, an electronic apparatus comprises a housing, a board in the housing, a pad on the board, and a component. The pad comprises a first portion and a second portion. The second portion comprises a protrusion toward the first portion. The component comprises a first electrode connected to the first portion and a second electrode connected to the second portion.

First Embodiment

FIGS. 1 to 8show an electronic apparatus1according to a first embodiment. The electronic apparatus1is, for example, a notebook portable computer (notebook PC). Electronic apparatuses to which this embodiment can be applied are not limited thereto. This embodiment can be widely applied to various kinds of electronic apparatuses including, for example, a television, a mobile phone, a smart phone, an electronic book terminal, and a game machine.

As shown inFIG. 1, the electronic apparatus1includes a first unit2, a second unit3, and hinge portions4aand4b. The first unit2is a main unit provided with, for example, a main board. The first unit2includes a first housing5. The first housing5has a flat box shape including an upper wall6, a lower wall7, and a peripheral wall8.

The lower wall7faces a desk surface when the electronic apparatus1is placed on a desk. The upper wall6is opposite to the lower wall7with a space therebetween and extends substantially in parallel to the lower wall7. An input portion9(i.e., input receiving portion) is provided on the upper wall6. An example of the input portion9is a keyboard. The input portion9is not limited thereto, and it may be a touch panel or other input devices. The peripheral wall8connects a peripheral edge of the lower wall7and a peripheral edge of the upper wall6.

As shown inFIG. 1, the second unit3is, for example, a display unit and includes a second housing11and a display device12provided in the second housing11. The display device12is, for example, a liquid crystal display, but is not limited thereto. The display device12includes a display screen12athat displays a video or an image.

The second housing11is rotatably (openably) connected to an end portion of the first housing5by the hinge portions4aand4b. In this way, the electronic apparatus1can be expanded between a first position where the first unit2and the second unit3overlap each other and a second position where the first unit2and the second unit3are opened. At the second position, the input portion9of the first unit2and the display screen12aof the second unit3are exposed to the outside of the electronic apparatus1.

As shown inFIG. 1, a printed circuit board21is provided in the first housing5of the first unit2. The printed circuit board21is an example of a board assembly. The printed circuit board21includes a board22and components23(electronic components or semiconductor devices) mounted on the board22. As shown inFIG. 2, the board22includes a plurality of pads24. The plurality of pads24include at least one common mounting pad25. The common mounting pad25(hereinafter, simply referred to as a pad25) corresponds to a plurality of kinds of components and one of the components is selectively mounted on the common mounting pad25.

FIG. 5is a view illustrating an example of the component23configured to be mounted on the pad25, as viewed from the rear surface side (lower surface side). The component23is, for example, a semiconductor component and includes a sealing portion30having a semiconductor provided therein and first to third electrodes31,32, and33provided in the sealing portion30. The sealing portion30is a so-called case (casing body) and has a semiconductor sealed therein.

As shown inFIG. 5, the sealing portion30has, for example, a substantially rectangular shape and includes a rear surface30afacing the board22. The rear surface30ais an example of a “region configured to face the board” in the sealing portion. The sealing portion30includes a first end34and a second end35opposite to the first end34.

A plurality of first electrodes31are provided in the first end34of the sealing portion30. The first electrodes31are arranged along the edge of the first end34. An example of the first electrode31is a signal lead (signal terminal) as a first terminal. A plurality of third electrodes33are provided in the second end35of the sealing portion30. The third electrodes33are arranged along the edge of the second end35. An example of the third electrode33is a ground lead (ground terminal) as a second terminal.

The second electrode32is provided on the rear surface30aof the sealing portion30. The second electrode32is an example of a so-called rear electrode. The second electrode32has a plate shape and is larger than the first and third electrodes31and33. An example of the second electrode32is a heat radiating conductor and the second electrode32has a relatively large area.

As shown inFIG. 5, the component23has an electrode structure that is asymmetric with respect to the center of the rear surface30a. An example of the component23is a field effect transistor (FET). The second electrode32is provided at, for example, a position that deviates from the center of the rear surface30ato the third electrode33. The second electrode32is connected to, for example, the third electrodes33and is formed integrally with the plurality of third electrodes33. For example, the second electrode32and the third electrodes33form a ground electrode with a ground potential. That is, an example of the second electrode32is an electrode that strengthens ground connection as measures for electromagnetic waves. The second electrode32may be formed separately from the third electrodes33. An example of the second electrode32is a power supply electrode.

FIGS. 6,7, and8show three kinds of components41,42, and43having substantially the same structure as the component23shown inFIG. 5.FIGS. 6,7, and8show the components41,42, and43, as viewed from the upper side. For convenience of explanation, the sealing portion30is represented by a two-dot chain line and the electrodes31,32, and33are represented by a solid line. InFIGS. 6,7, and8, structures having the same or similar functions as those in the component23shown inFIG. 5are denoted by the same reference numerals and the description thereof will not be repeated.

In the three kinds of components41,42, and43, the second electrodes32(rear electrodes) have different sizes. In the three kinds of components41,42, and43, the other structures may be identical to or different from each other. For example, the three kinds of components41,42, and43have the same function, but the embodiment is not limited thereto. The three kinds of components41,42, and43may have different functions.

As shown inFIGS. 6,7, and8, the first to third components41,42, and43include, for example, the sealing portions30having substantially the same outward shape and the first and third electrodes31and33which are arranged substantially at the same position. The first to third components41,42, and43include the second electrodes32with different sizes.

For example, the second electrode32of the second component42is larger than the second electrode32of the first component41. The edge45bof the second electrode32of the second component42is closer to the first electrode31than the edge45aof the second electrode32of the first component41.

In addition, the second electrode32of the third component43is larger than the second electrode32of the second component42. The edge45cof the second electrode32of the third component43is closer to the first electrode31than the edge45bof the second electrode32of the second component42. The edges45a,45b, and45cof the second electrodes32are disposed opposite to the third electrodes33. For example, the edges45a,45b, and45cextend in a direction substantially perpendicular to the direction from the second electrode32to the first electrode31.

Next, the pad25will be described with reference toFIGS. 3 and 4.

The pad25corresponds to all of the first to third components41,42, and43and any one of the first to third components41,42, and43is selectively mounted as the component23on the pad25.

As shown inFIGS. 3 and 4, the pad25includes first to third pad portions51,52, and53. The first pad portion51is an example of a “first portion” of the pad25. The second pad portion52is an example of a “second portion” of the pad25. The third pad portion53is an example of a “third portion” of the pad25.

A plurality of first pad portions51are provided so as to correspond to the first electrodes31and the first electrodes31are bonded to the first pad portions51by a bonding material55. An example of the bonding material55is solder. A plurality of third pad portions53are provided so as to correspond to the third electrodes33and the third electrodes33are bonded to the third pad portions53by the bonding material55.

The second pad portion52is provided so as to correspond to the second electrode32and is provided between the first pad portions51and the third pad portions53. The second electrode32is bonded to the second pad portion52by the bonding material55.

Next, a first direction X and a second direction Y are defined. The first direction X and the second direction Y are along the surface of the board22. The first direction X is from the second pad portion52to the first pad portion51. The second direction Y is crossing (for example, is substantially perpendicular to) the first direction X.

As shown inFIG. 3, the second pad portion52includes a first end52athat is close to the first pad portion51and a second end52bthat is close to the third pad portion53. The second end52bis formed in a substantially straight line. The first end52ais uneven.

Specifically, the second pad portion52includes first to third regions61,62, and63. In this embodiment, the first to third regions61,62, and63are integrated with each other, but the embodiment is not limited thereto. The first to third regions61,62, and63may be separated from each other.

As shown inFIG. 3, for example, the first region61is disposed between the second region62and the third region63. The first region61corresponds to the first component41. As shown inFIG. 6, the first region61includes a first side71(first edge) that corresponds to at least a portion of an edge45aof the second electrode32of the first component41. That is, the first side71extends substantially in parallel to the edge45aof the second electrode32of the first component41and is adjacent to the edge45aof the second electrode32of the first component41.

The term “corresponding to the edge” is not limited to complete overlap (accord) with the edge, but it may include positioning close (for example, in the vicinity of) to the edge. In addition, the term “corresponding to the edge” is not limited to “correspondence over the entire length of the edge”, but it may include “corresponding to a portion of the edge”.

The second region62is a region that corresponds to the second component42. As shown inFIG. 3, the second region62includes a portion (first convex portion) that protrudes from the first region61toward the first pad portion51. That is, the second region62protrudes from the first region61toward the first pad portion51. Specifically, the second region62includes a first part62athat is adjacent to (i.e., lined with) the first region61in the second direction Y and a second part62bthat is not adjacent to (i.e., not lined with) the first region61in the second direction Y. The second part62bis an example of the first convex portion.

As shown inFIG. 7, the second part62bincludes a second side72(second edge) that corresponds to at least a portion of an edge45bof the second electrode32of the second component42. That is, the second side72extends substantially in parallel to the edge45bof the second electrode32of the second component42and is adjacent to the edge45bof the second electrode32of the second component42.

The third region63is a region that corresponds to the third component43. As shown inFIG. 3, the third region63includes a portion (second convex portion) that protrudes with respect to the second region62toward the first pad portion51. That is, the third region63protrudes with respect to (i.e., compared to) the second region62toward the first pad portion51. Specifically, the third region63includes a first part63athat is adjacent to (i.e., lined with) the first and second regions61and62in the second direction Y and a second part63bthat is not adjacent to (i.e., not lined with) the first and second regions61and62in the second direction Y. The second part63bis an example of the second convex portion.

As shown inFIG. 8, the second part63bincludes a third side73(third edge) that corresponds to at least a portion of an edge45cof the second electrode32of the third component43. That is, the third side73extends substantially in parallel to the edge45cof the second electrode32of the third component43and is adjacent to the edge45cof the second electrode32of the third component43.

As shown inFIG. 3, the length of the first end52aof the second pad portion52is equally divided corresponding to the number of components configured to be mounted on the pad25. In this embodiment, the length of the first end52aof the second pad portion52is trisected corresponding to three kinds of components41,42, and43. That is, the length L1of the first side71, the length L2of the second side72, and the length L3of the third side73are substantially equal to each other.

As shown inFIG. 3, the board22includes an insulation portion75(non-pad portion) that is defined by the uneven shape of the first end34of the pad25and is between a pair of the third regions63. For example, a resist is provided in the insulation portion75such that the bonding material55is not spread.

The insulation portion75includes a first part75aand a second part75b. The first part75ais defined between the first side71and the second side72and is adjacent to the second part62bof the second region62in the second direction Y. The second part75bis defined between the second side72and the third side73and is adjacent to the second part63bof the third region63in the second direction Y.

As shown inFIG. 6, the first component41is bonded to the first region61, the first part62aof the second region62, and a part of the first part63aof the third region63. As shown inFIG. 7, the second component42is bonded to the first region61, the first and second parts62aand62bof the second region62, and the first part63aof the third region63and overlaps the first part75aof the insulation portion75. As shown inFIG. 8, the third component43is bonded to the first region61, the first and second parts62aand62bof the second region62, and the first and second parts63aand63bof the third region63and overlaps the first and second parts75aand75bof the insulation portion75.

Next, the operation of the pad25will be described.

During the mounting of the component23on the pad25, the bonding material55, such as solder, is supplied onto the pad25in advance and the bonding material55is melted by a reflow process to bond the electrodes31,32, and33of the component23to the pad25. During the reflow process, the bonding material55is melted to have fluidity and is spread so as to correspond to the shape of the pad25. Then, the bonding material55generates surface tension at the sides71,72, and73of the pad25.

During soldering, the molten bonding material55is spread to the entire pad portion52(that is, the first to third regions61,62, and63) and surface tension is applied between the molten bonding material on the entire pad portion52and the electrode32. On the other hand, for convenience of explanation, the individual phenomenon will be described focusing on the surface tension occurring in a specific region.

As shown inFIG. 6, when the first component41is mounted, the position of the second electrodes32of the first component41is likely to be stabilized due to the surface tension of the bonding material55occurring at the first side71. That is, when the second electrodes32of the first component41are moved toward the first pad portion51over the first side71, tensile force is applied to the first component41in a direction opposite to the moving direction due to the surface tension of the bonding material55occurring at the first side71. In this way, the positional deviation of the first component41is suppressed and the first component41is held at the position where the edge45aof the second electrode32is adjacent to the first side71.

As shown inFIG. 7, when the second component42is mounted, the position of the second electrodes32of the second component42is likely to be stabilized due to the surface tension of the bonding material55occurring at the second side72. That is, when the second electrodes32of the second component42are moved toward the first pad portion51over the second side72, tensile force is applied to the second component42in a direction opposite to the moving direction due to the surface tension of the bonding material55occurring at the second side72. In this way, the positional deviation of the second component42is suppressed and the second component42is held at the position where the edge45bof the second electrode32is adjacent to the second side72.

As shown inFIG. 8, when the third component43is mounted, the position of the second electrodes32of the third component43is likely to be stabilized due to the surface tension of the bonding material55occurring at the third side73. In this way, the positional deviation of the third component43is suppressed and the third component43is held at the position where the edge45cof the second electrode32is adjacent to the third side73.

According to this structure, it is possible to selectively mount a plurality of kinds of components41,42, and43on one kind of pad25. When any component is mounted, the positional deviation of the component is suppressed.

In some cases, in the components that have the same function and are manufactured by different manufacturers, the second electrodes32(rear electrodes) have different sizes. In this case, it is considered that a pad is formed in a rectangular shape corresponding to the maximum electrode size, in order to respond to a plurality of kinds of components including the second electrodes32having different sizes with one kind of pad.

However, in this case, during the mounting of a component with an electrode size which is not the maximum electrode size on the pad, when the bonding material55has fluidity in the reflow process, the component is moved due to the balance between the surface tensions of solder on the pad such that the edge of the electrode overlaps the edge of the pad. As a result, the positional deviation of the component is likely to occur.

In contrast, in this embodiment, the pad25includes the first pad portion51and the second pad portion52including a portion that protrudes toward the first pad portion51. According to this structure, since the length of the edge of the pad close to the first pad portion51is reduced, it is possible to reduce force to draw the component23toward the first pad portion51, as compared to a structure in which a rectangular pad is provided. In addition, when the electrode32of the component23are moved toward the first pad portion51over the first side71, force is applied to the component23in a direction opposite to the moving direction due to the surface tension occurring at the first side71. On the contrary, when the electrode32of the component23are moved toward the third pad portion53over the third side73, force is applied to the component23in a direction opposite to the moving direction due to the surface tension occurring at the third side73. Therefore, the position of the component23is likely to be stabilized and the positional deviation thereof is less likely to occur.

In this embodiment, the pad25includes the first side71that corresponds to at least a portion of the electrode32of the first component41and the second side72that corresponds to at least a portion of the electrode32of the second component42. According to this structure, the position of the electrode32of the first component41is likely to be stabilized by the first side71. In addition, the position of the electrode32of the second component42is likely to be stabilized by the second side72. Therefore, the positional deviation of each of the two components41and42is suppressed by one pad25.

In this embodiment, the second pad portion52includes the first side71that corresponds to at least a portion of the edge45aof the electrode32of the first component41and the second side72that corresponds to at least a portion of the edge45bof the electrode32of the second component42. According to this structure, the first component41is stabilized at the position where the edge45aof the electrode32is adjacent to the first side71. In addition, the second component42is stabilized at the position where the edge45bof the electrode32is adjacent to the second side72. Therefore, the positional deviation of each of the two components41and42is suppressed by one pad25. In addition, since each of the first side71and the second side72can function as a positioning guide, the positional deviation of the components41and42is suppressed.

Each of the first to third components41,42, and43includes the sealing portion30having a semiconductor provided therein. At least a portion of the second electrode32is provided in a region of the sealing portion30facing the board22. According to this structure, it is possible to suppress the positional deviation of a plurality of components41,42, and43including so-called rear surface electrodes with different sizes.

In this embodiment, the first and second regions61and62are integrated with each other. According to this structure, it is easy to supply the bonding material55to the first and second regions61and62and manufacturability is improved.

In this embodiment, the second pad portion52is provided between the first pad portions51and the third pad portions53. According to this structure, it is possible to suppress the positional deviation of a plurality of components41,42, and43including the rear electrodes32with different sizes.

In this embodiment, the second pad portion52includes the third side73that corresponds to at least a portion of the edge45cof the electrode32of the third component43. According to this structure, it is possible to provide the common pad25that can correspond to three kinds of components41,42, and43.

In this embodiment, the second and third regions62and63are separated on both sides of the first region61. Therefore, the bonding material55in the second region62is not likely to be spread to the third region63. That is, since the movement of the bonding material55is limited a little, the positional deviation of the components41,42, and43is further suppressed.

In this embodiment, the first to third sides71,72, and73have substantially the same length. According to this structure, it is possible to substantially uniformly distribute tensile force. Therefore, the positions of the three components41,42, and43are likely to be further stabilized.

Next, some modifications will be described with reference toFIGS. 9 and 10.

As shown inFIG. 9, the second pad portion52and the third pad portion53may be integrated with each other. According to this structure, it is possible to obtain the same effect as that of the above-described embodiment.

As shown inFIG. 10, in the second pad portion52, the second end52bmay be uneven. That is, the second region62includes a portion that protrudes from the first region61toward the third pad portion53. The third region63includes a portion that protrudes with respect to the second region62toward the third pad portion53. According to this structure, it is easy to limit the movement of the bonding material55in the second pad portion52. Therefore, the positions of the components41,42, and43are further stabilized.

Second Embodiment

Next, an electronic apparatus1according to a second embodiment will be described with reference toFIGS. 11,12, and13. In the second embodiment, components having the same or similar functions as those in the first embodiment are denoted by the same reference numerals and the description thereof will not be repeated. In addition, structures other than the following structures are the same as those in the first embodiment.

In this embodiment, a pad25corresponds to two kinds of components41and42and one of the first and second components41and42is selectively mounted as a component23. Specifically, a second pad portion52includes the first and second regions61and62. In this embodiment, the first and second regions61and62are integrated with each other, but the embodiment is not limited thereto. The first and second regions61and62may be separated from each other. In this embodiment, the length of a first end52aof the second pad portion52is bisected corresponding to two kinds of components41and42. That is, the length L1of a first side71is substantially equal to the length L2of a second side72.

As shown inFIG. 11, a board22includes an insulation portion75(non-pad portion) that is defined by the uneven shape of a first end52aof the second pad portion52and is between a pair of the second regions62. The insulation portion75is between the first side71and the second side72and is adjacent to a second part62aof the second region62in the second direction Y.

As shown inFIG. 12, the first component41is bonded to the first region61and the first part62aof the second region62. As shown inFIG. 13, the second component42is bonded to the first region61and the first and second parts62aand62bof the second region62and overlaps the insulation portion75.

According to this structure, similarly to the first embodiment, a plurality of kinds of components41and42can be selectively mounted on one kind of pad25. In addition, when any component is mounted, the positional deviation of the component is suppressed.

FIG. 14shows a modification of the pad25according to this embodiment. As shown inFIG. 14, in the pad25, the number of recess and protrusion portions may increase. That is, the pad25may include, for example, three or more first regions61and three or more second regions62. In the example of the pad25in which the number of recess and protrusion portions increases, the sum of the lengths of a plurality of first sides71is substantially equal to the sum of the lengths of a plurality of second sides72.

In the pad25including three regions61,62, and63according to the first embodiment, the number of recess and protrusion portions may increase, similarly to the structure shown inFIG. 14.

Third Embodiment

Next, an electronic apparatus1according to a third embodiment will be described with reference toFIGS. 15 to 18. In the third embodiment, components having the same or similar functions as those in the first embodiment are denoted by the same reference numerals and the description thereof will not be repeated. In addition, structures other than the following structures are the same as those in the first embodiment.

A component81(electronic component) according to this embodiment corresponds to a plurality of kinds of pads (i.e., a plurality of kinds of boards) and includes a common mounting electrode that can be mounted on any of the pads. In this embodiment, the component81corresponds to, for example, three kinds of pads91,92, and93and includes an electrode32that can be mounted on any of the pads91,92, and93.FIGS. 16,17, and18show the three kinds of pads91,92, and93to which the component81corresponds.

As shown inFIGS. 16,17, and18, in the three kinds of pads91,92, and93, the second pad portions52have different sizes. The other portions may be identical to or different from each other. For example, the three kinds of pads91,92, and93have the same function, but the embodiment is not limited thereto. The three kinds of pads91,92, and93may have different functions.

The first to third pads91,92, and93include, for example, substantially the same first and third pad portions51and53. The first to third pads91,92, and93include the second pad portions52with different sizes.

For example, the second pad portion52of the second pad92is larger than the second pad portion52of the first pad91. The edge95bof the second pad portion52of the second pad92is closer to the first pad portion51than the edge95aof the second pad portion52of the first pad91.

In addition, the second pad portion52of the third pad93is larger than the second pad portion52of the second pad92. The edge95cof the second pad portion52of the third pad93is closer to the first pad portion51than the edge95bof the second pad portion52of the second pad92. The edges95a,95b, and95cof the second pad portions52are disposed opposite to the third pad portions53.

FIG. 15is a view illustrating an example of the component81, as viewed from the rear surface side. The component81is, for example, a semiconductor component. The component81includes first to third electrodes31,32, and33. The second electrode32includes a first end32athat is close to the first electrode31and a second end32bthat is close to the third electrode33. The second end32bis formed in a substantially straight line. The first end32ahas an uneven shape.

The second electrode32includes first to third regions61,62, and63. In this embodiment, the first to third regions61,62, and63are integrated with each other, but the embodiment is not limited thereto. The first to third regions61,62, and63may be separated from each other.

As shown inFIG. 15, for example, the first region61is provided between the second region62and the third region63. The first region61corresponds to the first pad91. As shown inFIG. 16, the first region61includes a first side71(first edge) that corresponds to at least a portion of the edge95aof the second pad portion52of the first pad91. That is, the first side71extends substantially in parallel to the edge95aof the second pad portion52of the first pad91and is adjacent to the edge95aof the second pad portion52of the first pad91.

The second region62is a region that corresponds to the second pad92. As shown inFIG. 17, the second region62includes a portion (first convex portion) that protrudes from the first region61toward the first electrode31. That is, the second region62protrudes from the first region61toward the first electrode31. The second region62includes a second side72(second edge) that corresponds to at least a portion of the edge95bof the second pad portion52of the second pad92. That is, the second side72extends substantially in parallel to the edge95bof the second pad portion52of the second pad92and is adjacent to the edge95bof the second pad portion52of the second pad92.

The third region63is a region that corresponds to the third pad93. As shown inFIG. 18, the third region63includes a portion (second convex portion) that protrudes with respect to (i.e., compared to) the second region62toward the first electrode31. That is, the third region63protrudes with respect to the second region62toward the first electrode31. The third region63includes a third side73(third edge) that corresponds to at least a portion of the edge95cof the second pad portion52of the third pad93. That is, the third side73extends substantially in parallel to the edge95cof the second pad portion52of the third pad93and is adjacent to the edge95cof the second pad portion52of the third pad93.

As shown inFIG. 15, the length of the first end32aof the second electrode32is equally divided corresponding to the kind of pad on which the component81is mounted. In this embodiment, the length of the first end32aof the second electrode32is trisected corresponding to three kinds of pads91,92, and93. That is, the length L1of the first side71, the length L2of the second side72, and the length L3of the third side73are substantially equal to each other. The sealing portion30includes an insulation portion75(non-electrode portion) that is defined by the uneven shape of the first end32aof the second electrode32and is between a pair of the third regions63.

According to this structure, it is possible to mount the component81on any of a plurality of kinds of pads91,92, and93using the same operation as that in the first embodiment. In addition, when the component81is mounted on any of the pads91,92, and93, the positional deviation of the component81is suppressed.

In some cases, in the pads on which components having the same function are mounted and which are manufactured by different manufacturers, the second pad portions52have different sizes. According to the component81of this embodiment, one kind of component81can correspond to a plurality of kinds of pads91,92, and93(that is, a plurality of kinds of boards) including the second pad portions52with different sizes.

As in the second embodiment relative to the first embodiment, the second electrode32may include only the first and second regions61and62and correspond to two kinds of pads91and92. As in the structure shown inFIG. 14, in the second electrode32, the number of recess and protrusion portions may increase.

According to the first to third embodiments, it is possible to suppress the positional deviation of the component.

The embodiments are not limited to the above-described embodiments, and the components of the above-described embodiments may be changed without departing from the scope and spirit of the invention. In addition, a plurality of components according to the above-described embodiments may be appropriately combined with each other to form various structures. For example, some of the components according to the above-described embodiments may be removed. Components according to different embodiments may be appropriately combined with each other.

For example, in the above-described embodiments, the pad25corresponds to two or three kinds of components and the component81corresponds to two or three kinds of pads. However, the embodiments are not limited thereto. The pad25may correspond to four or more kinds of components and the component81may correspond to four or more kinds of pads. The shapes of the pad25and the electrode32are not limited to the above. The first to third sides71,72, and73may have different lengths. The component23may not include the third electrode33, and a portion of the second electrode32may be bonded to the third pad53.

Next, some electronic apparatuses and components are additionally described.

An electronic apparatus according to a first aspect comprises a housing, a board provided in the housing and comprising one of a first pad and a second pad, and a component on the board. The component is configured to be selectively mounted on one of the first pad and the second pad. The component comprises an electrode comprising a first edge configured to correspond to at least a portion of the first pad and a second edge configured to correspond to at least a portion of the second pad.

An electronic apparatus according to a second aspect comprises a housing, a board provided in the housing and comprises a pad comprising a first portion and a second portion, and a component on the pad. The component comprises a first electrode configured to be bonded to the first portion and a second electrode comprising a portion protruding toward the first electrode and configured to be bonded to the second portion.

A component (e.g., semiconductor device) according to a third aspect is configured to be selectively mounted on one of a first pad and a second pad. The component comprises an electrode comprising a first edge configured to correspond to at least a portion of the first pad and a second edge configured to correspond to at least a portion of the second pad.

A component (e.g., semiconductor device) according to a fourth aspect comprises a first electrode and a second electrode. The second electrode comprises a portion protruding toward the first electrode.