Semiconductor device and method for manufacturing the same

A semiconductor device includes a lead, a semiconductor element, a first resin molded body, and a second resin molded body. The lead is a thin metal plate having a first surface and a second surface on an opposite side from the first surface. The semiconductor element is fixed to the lead. The first resin molded body is arranged on the first surface of the lead. An outer shape of the first resin molded body is left and right symmetric with respect to a center axis passing through a center of the first resin molded body in a plan view. The second resin molded body is arranged on the second surface of the lead. An outer shape of the second resin molded body is left and right asymmetric with respect to a center axis passing through a center of the second resin molded body in the plan view.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to Japanese Patent Application No. 2018-163380 filed on Aug. 31, 2018. The entire disclosure of Japanese Patent Application No. 2018-163380 is hereby incorporated herein by reference.

BACKGROUND OF THE INVENTION

Field of the Invention

The present invention relates to a semiconductor device and to a method for manufacturing the semiconductor device.

Description of the Related Art

In general, a semiconductor device is manufactured by fixing a semiconductor element to a resin molded body formed by pouring a resin into a die (an upper die and a lower die) in a state in which a lead frame including a portion that will become a lead electrode is sandwiched from above and below by the dies.

In the process of manufacturing such a semiconductor device, it is important to accurately position and mold the first resin molded body and the second resin molded body disposed so as to sandwich the lead frame.

For example, Japanese Laid-Open Patent Application Publication No. 2012-15176 discloses a light emitting device in which a protruding part or a recess component is provided to the inner peripheral edge and/or the outer peripheral edge on the mounting area side of a metal layer formed around a light emitting element mounting area in order to instantly determine with high accuracy whether or not there is positional deviation of a light reflecting material relative to the mounting area of the light emitting element. The above-mentioned publication also discloses a method for inspecting this type of light emitting device.

SUMMARY

However, the following problems have been encountered with the conventional method discussed above.

With the method for inspecting a light emitting device disclosed in the above-mentioned publication, a protruding part or the like is provided on the mounting area side of a metal layer formed around the light emitting element mounting area in order to determine in the case where there is positional deviation of the light reflecting material with respect to the mounting area of the light emitting element.

However, no consideration whatsoever is given to the detection of the relative positional deviation of the resin molded bodies that are molded so as to sandwich the lead frame using dies.

It is an object of the present invention to provide a semiconductor device with which relative positional deviation of resin molded bodies disposed so as to sandwich a lead frame can be easily detected, as well as to provide a method for manufacturing the semiconductor device.

A semiconductor device according to one aspect includes a lead, a semiconductor element, a first resin molded body, and a second resin molded body. The lead is a thin metal plate having a first surface and a second surface on an opposite side from the first surface. The semiconductor element is fixed to the lead. The first resin molded body is arranged on the first surface of the lead. An outer shape of the first resin molded body is left and right symmetric with respect to a center axis passing through a center of the first resin molded body in a plan view. The second resin molded body is arranged on the second surface of the lead so that the lead is fixed between the first resin molded body and the second resin molded body. An outer shape of the second resin molded body is left and right asymmetric with respect to a center axis passing through a center of the second resin molded body in the plan view.

With a semiconductor device including a lead for supporting and fixing a semiconductor element, and a first resin molded body and a second resin molded body disposed so as to sandwich the lead from above and below, the first resin molded body is formed such that its outer shape is in left and right symmetry, and the second resin molded body is formed such that its outer shape is in left and right asymmetry, in order to detect positional deviation of the second resin molded body with respect to the first resin molded body.

Here, the “lead for supporting and fixing a semiconductor element” is a thin metal plate obtained by dividing a single lead frame, in which a plurality of semiconductor packages are disposed at specific positions, in the process of manufacturing a semiconductor device. The first resin molded body and the second resin molded body are each molded by an upper die and a lower die disposed above and below the lead. Therefore, in the case where a resin is injected in a state in which relative positional deviation has occurred between the upper die and the lower die in the semiconductor device manufacturing process, there is a risk that the first resin molded body and the second resin molded body will end up being molded while their relative positions have shifted.

This relative positional deviation between the first resin molded body and the second resin molded body may cause problems such as deviation of the bending position of the terminal provided to part of the lead, deviation of the disposition of the semiconductor element, or the like. Therefore, detection and management of relative positional deviation between the first resin molded body and the second resin molded body are important in a semiconductor device manufacturing process.

With this semiconductor device, the first resin molded body and the second resin molded body, which are molded so as to sandwich the lead from above and below, are molded so that one is in left and right symmetry and the other is in left and right asymmetry. Accordingly, in a state in which the first resin molded body and the second resin molded body are accurately molded relative to one another, a portion where part of the first resin molded body is visible and a portion where it cannot be seen, in the case where viewed from the second resin molded body side, can be provided.

Therefore, in the case where the first resin molded body and the second resin molded body are molded with relative displacement due to positional deviation between the upper and lower dies, the portions where part of the first resin molded body can and cannot be seen from the second resin molded body side will change.

That is, in the case where there is relative positional deviation between the first resin molded body and the second resin molded body, changes may occur, such as in the case where the part of the first resin molded body that was visible when viewed from the second resin molded body side is no longer visible, or in the case where the part that could not be seen now becomes visible.

As a result, any relative positional deviation between the first resin molded body and the second resin molded body can be easily detected by detecting whether or not there has been a change in the portions of the first resin molded body that can and cannot be seen as viewed from the second resin molded body side.

The semiconductor device according to the second aspect is the semiconductor device according to the first aspect, wherein the first resin molded body has a gate mark.

Here, the first resin molded body formed such that its outer shape is in left and right symmetry is molded by a die on the gate side where the resin is injected.

Consequently, usually the bending of the lead terminal can be properly detected by easily detecting and managing the positioning accuracy of the first resin molded body disposed on the gate side, which is the starting point side where the lead terminal is bent.

The semiconductor device according to the third aspect is the semiconductor device according to the first or second aspect, wherein the second resin molded body defines a recess in which the semiconductor element is placed.

Here, a recess for mounting a semiconductor element is provided to the second resin molded body.

Consequently, a semiconductor device with high accuracy can be manufactured by easily detecting and managing the relative positional deviation between the first resin molded body and the second resin molded body that make up a semiconductor device having the light emitting portion on the second resin molded body side.

The semiconductor device according to the fourth aspect is the semiconductor device according to the third aspect, wherein the recess opens on a side surface of the semiconductor device.

Here, the recess for placing the semiconductor element is provided to a side surface of the semiconductor device.

Here, the “side surface” of the semiconductor device refers to a surface of the second molded body intersecting a mounting surface of the semiconductor device.

This allows positional deviation of a side-emission semiconductor device having a semiconductor element on a side surface to be easily detected.

The semiconductor device according to the fifth aspect is the semiconductor device according to the third aspect, wherein the recess opens on an upper surface of the semiconductor device.

Here, the recess for placing the semiconductor element is provided to the upper surface of the semiconductor device.

Here, the “upper surface” of the semiconductor device refers to the surface of the second molded resin body on the opposite side from the surface facing the lead (i.e., the surface on the opposite side of the mounting surface of the semiconductor device).

This allows any positional deviation of a top-emission semiconductor device having a semiconductor element on its upper surface to be easily detected.

The semiconductor device according to the sixth aspect is the semiconductor device according to any of the first to fifth aspects, wherein the lead further has a terminal that is configured to be connected to external wiring.

Here, a terminal that is configured to be connected to external wiring is provided as part of the lead.

This makes it possible to easily detect and manage whether or not the first resin molded body and the second resin molded body, which are disposed so as to sandwich the lead from above and below, are accurately positioned, so the dimensions of the terminal can be controlled and bending of the terminal can be carried out properly, for example.

As a result, it is possible to effectively eliminate product thickness variance, uneven light emission, variance in the orientation of the light emitting surface, substrate mounting defects during soldering, and other such problems attributable to variance in the dimensions of the terminal.

The method for manufacturing a semiconductor device according to the seventh aspect is a method for manufacturing the semiconductor device according to any of the first to sixth aspects, said method including the steps of setting a lead frame in a die, injecting a resin into the die, and curing the resin to form the first resin molded body and the second resin molded body.

Here, in the above method for manufacturing a semiconductor device, after the lead frame has been placed in the molding die, resin is injected into the cavity of the molding die to mold the first resin molded body and the second resin molded body so as to sandwich the lead frame, and then the resin is cured.

Here, the molding die includes, for example, an upper die for molding the first resin molded body and a lower die for molding the second resin molded body, with these dies disposed so as to sandwich the lead frame.

This makes it possible to manufacture a semiconductor device with which relative positional deviation between the first resin molded body and the second resin molded body attributable to positional deviation of the molding dies can be easily detected.

The method for manufacturing a semiconductor device according to the eighth aspect is the method for manufacturing a semiconductor device according to the seventh aspect, wherein the first resin molded body and the second resin molded body are molded by injection molding or transfer molding.

Here, the resin portions (the first resin molded body and the second resin molded body) that make up the semiconductor device are molded by injection molding or transfer molding.

Consequently, it is possible to manufacture, by using injection molding or transfer molding, a semiconductor device with which relative positional deviation between the first resin molded body and the second resin molded body can be easily detected.

With the semiconductor device according to the above described aspects, a relative positional deviation of the resin molded bodies disposed so as to sandwich the lead can be easily detected.

DETAILED DESCRIPTION OF THE INVENTION

The semiconductor device according to an embodiment of the present invention is will now be described through reference toFIGS. 1A to 5andFIG. 13.

The semiconductor device10according to the present embodiment is a light emitting device, and is a so-called side view (side light emission) type of LED (light emitting diode) having its light emitting surface on a side surface.

As shown inFIGS. 1A and 1B, the semiconductor device10primarily includes a semiconductor element15and a package18having two leads11aand11bthat function as a pair of positive and negative electrodes and a resin molded body17that integrally holds the two leads11aand11b.

The resin molded body17has a second resin molded body13that is formed on the second surface (upper surface) side of the leads11aand11b(the lead frame11in the manufacturing process) and includes a portion that becomes a recess14that opens on a side surface, and a first resin molded body12that is formed on the first surface (lower surface) side (gate side) of the leads11aand11b(the lead frame11in the manufacturing process).

The first resin molded body12and the second resin molded body13are integrally formed so as to sandwich the first and second surfaces of the two leads11aand11b. The inner surface of the recess14of the package18is composed of the second resin molded body13, and the bottom surface of the recess14is composed of a part of the two leads11aand11band of the second resin molded body13that is in between these leads. In other words, the leads11aand11bare exposed from the second resin molded body13at the bottom of the recess14.

The semiconductor element15is disposed on the bottom surface of the recess14and is electrically connected to the leads11aand11bby wires or the like. Parts of the leads11aand11bextend to the outside of the resin molded body17and function as terminals.

As shown inFIGS. 1A and 1B, with this semiconductor device10, a package group is prepared in which a plurality of packages18having the recess14are disposed at predetermined positions, semiconductor elements15, etc., are attached in the recesses14, and finally this product is separated into individual packages.

In this package group18, a plurality of resin molded bodies17are arranged in a matrix on a single lead frame11including a plurality of holes16for forming the leads11aand11band hanger leads11cand11d.

During molding, as shown inFIG. 3, the first resin molded body12is on the lower side and the second resin molded body13is on the upper side. During forming, the first resin molded to body12may be on the upper side and the second resin molded body13may be on the lower side. Furthermore, when the semiconductor device is disposed, the semiconductor device may be manufactured with the first resin molded body12on the lower side and the second resin molded body13on the upper side. That is, since the semiconductor device is attached so that the opening of the recess14faces up, in the description of the process, the opening side of the recess14, which becomes the light emission surface, shall be described as the upper side.

The lead frame11is a thin metal plate, a plurality of holes16are formed at predetermined positions, and the portion left by the holes16becomes the leads11aand11bthat function as terminals and the hanger leads11cand11dthat function as supports in the final form of the product shown inFIG. 13. Also, the lead frame11is sandwiched from above and below (with the second surface side up and the first surface side down) by the first resin molded body12and the second resin molded body13, and has the two leads11aand11bthat function as electrodes of the semiconductor device10. Furthermore, the lead frame11has a frame portion (not shown) that surrounds the lead frame11, and the hanger leads11cand11dthat connect the lead frame11and the frame portion, parts of which are embedded in the resin molded body17and thereby serve as supports that hold the package18.

A part of the lead frame11includes a portion that is exposed on the bottom surface of the recess14and a portion that extends outward from the first resin molded body12and the second resin molded body13. The leads11aand11b, which are a part of the lead frame11extended to the outside, are bent as shown inFIG. 13and used as terminals that are connected to external wiring.

The first resin molded body12is a resin portion disposed on the first surface (lower surface) side (gate side) of the lead frame11in the manufacturing process, and resin is injected into and molded in the cavity of a molding die20in which the lead frame11has been placed (seeFIG. 3). The first resin molded body12is molded in a lower die21having a gate21aconstituting the molding die20(discussed below), and has a gate mark12athat is connected to the gate21a.

As shown inFIG. 2, the first resin molded body12is disposed such that its outer shape is in left and right symmetry with respect to the center axis C-C in plan view.

In this embodiment, the center axis C-C is disposed along the up and down direction inFIG. 2.

The second resin molded body13is a resin portion disposed on the second surface (upper surface) side of the lead frame11in the manufacturing process, and resin is injected into and molded in the cavity of the molding die20in which the lead frame11has been placed (seeFIG. 3). The second resin molded body13is molded in an upper die22constituting the molding die20(discussed below), and the recess14is formed in which the semiconductor element15is disposed after molding.

As shown inFIG. 2, the outer shape of the second resin molded body13is in left and right asymmetry with respect to the center axis C-C in plan view. More specifically, in the case where the A portion and the B portion of the second resin molded body13inFIG. 2are compared, the sizes of the steps on the side surface are different. As in the front view shown inFIG. 1A, the recess14of the package18, which is wider than it is tall, has an opening width at the central part (the width in the up and down direction) that is greater than the opening width (the width in the up and down direction) on the left and right sides flanking the central part. In a front view of the package18, the thickness of the package18at the lower end of the right side surface is greater than the thickness of the package18at the lower end of the left side surface.

Consequently, in the case where viewed from the first resin molded body12side, the overlapping portion of the first resin molded body12and the second resin molded body13looks different in the case where viewed on the right and left. That is, as shown inFIG. 2, a comparison of the A portion and the B portion reveals that in the A portion there is a portion (first determination component13a) where part of the second resin molded body13can be seen, and with the B portion, there is a portion (second determination component13b) where the second resin molded body13cannot be seen.

FIG. 2shows a state in which the first resin molded body12and the second resin molded body13are disposed in the proper positions.

Also, the molding die20used for molding the first resin molded body12and the second resin molded body13actually molds a plurality of packages18to form a plurality of semiconductor devices10with respect to the lead frame11, to simplify the description,FIG. 3illustrates the molding of just one package18.

As shown inFIG. 2, with the package18of the semiconductor device10in this embodiment, in the case where the first resin molded body12and the second resin molded body13are disposed at appropriate positions so as to sandwich the leads11aand11b, this results in a state in which either the left or right end (the first determination component13a) of the second resin molded body13is visible, and the other one (the second determination component13b) is not visible, in the case where viewed from the first resin molded body12side.

That is, the second resin molded body13has the first determination component13aand the second determination component13bat the left and right ends in order to detect whether there is any relative positional deviation between the first resin molded body12and the second resin molded body13.

A method for detecting relative positional deviation between the first resin molded body12and the second resin molded body13will be described in detail below.

The semiconductor element15is an LED (light emitting diode), and is fixed to the bottom of the recess14formed in the package18. The semiconductor element15emits light in the case where a voltage is applied to terminals formed by bending part of the leads11aand11bextending to the outside from the resin molded body17.

Checking Relative Positional Deviation Between First Resin Molded Body12and Second Resin Molded Body13

As described above, with the package18of the semiconductor device10in this embodiment, the outer shape of the first resin molded body12is in left and right symmetry around the center axis C-C, and the outer shape of the second resin molded body13is in left and right asymmetry around the center axis C-C, so that relative positional deviation between the first resin molded body12and the second resin molded body13, which have been molded so as to sandwich the leads11aand11b, can be easily checked.

Therefore, in the case where the first resin molded body12and the second resin molded to body13are molded at the appropriate positions, as shown inFIG. 4A, the first determination component13a(the hatched portion in the drawing) of the second resin molded body13can be seen at the A portion, and the second determination component13bis hidden by the first resin molded body12and cannot be seen at the B portion, as viewed from the first resin molded body12side.

Here, the A portion and the B portion are boundary portions between the first resin molded body12and the second resin molded body13and the leads11aand11b, and are the starting points of the bends in the leads11aand11bthat are worked into terminals. Therefore, it is particularly important to make the bends by accurately managing the size (length) of the leads11aand11bfunctioning as the terminals in the A and B portions.

On the other hand, in the case where the second resin molded body13is molded so as to be displaced to the lower side in the drawing with respect to the first resin molded body12, as shown inFIG. 4B, this results in a state in which the first determination component13a(the hatched portion in the drawing) of the second resin molded body13becomes prominently visible at the A portion, and the second determination component13b(the hatched portion in the drawing) is also visible at the B portion, as viewed from the first resin molded body12side.

Therefore, in the proper positions, the first determination component13ais visible at the A portion and the second determination component13bis not visible in the B portion, but in the case where a state is detected in which the second determination component13bis visible at the B portion, this makes it easy to determine that there is relative positional deviation between the first resin molded body12and the second resin molded body13.

Furthermore, in the case where the second resin molded body13is molded so as to be displaced to the upper side in the drawing with respect to the first resin molded body12, as shown inFIG. 4C, the first determination component13aof the second resin molded body13cannot be seen at the A portion, and the second determination component13balso cannot be seen at the B portion, as viewed from the first resin molded body12side.

Accordingly, in the proper positions, the first determination component13acan be seen at the A portion and the second determination component13bcannot be seen at the B portion, but in the case where a state is detected in which neither the first determination component13aat the B portion nor the second determination component13bat the B portion is visible, this makes it easy to determine that there is relative positional deviation between the first resin molded body12and the second resin molded body13.

With the package18of the semiconductor device10in this embodiment, as described above, in the case where the first resin molded body12disposed on the gate side is in the proper position, the A portion (the first determination component13a) of the second resin molded body13is not hidden by the first resin molded body12and can be seen in the case where the second resin molded body13disposed on the cavity side is viewed from the gate side near the leads11aand11bfunctioning as terminals. On the other hand, the B portion (the second determination component13b) of the second resin molded body13is hidden by the first resin molded body12and cannot be seen in this state.

That is, in this embodiment, in the case where the first resin molded body12and the second resin molded body13are molded so that they are in their proper positions relative to one another, the first determination component13aof the A portion can be seen, but the second determination component13bof the B portion cannot, and this state is used as a reference.

Consequently, a change from this reference state, such as a state in which the first determination component13aof the A portion cannot be seen, or in which the second determination component13bof the B portion can be seen, can be detected through image processing or the like, which makes it easy to determine whether there is any relative positional deviation between the first resin molded body12and the second resin molded body13.

More specifically, it can be determined that the first resin molded body12has been displaced upward in the drawing (see the arrow) by detecting the state shown inFIG. 4Bin which the first determination component13aof the A portion is visible and the second determination component13bof the B portion is also visible, from the reference state shown inFIG. 4A(in which the first determination component13aof the A portion is visible and the second determination component13bof the B portion is not visible).

It can be determined that the first resin molded body12has been displaced downward in the drawing (see the arrow) by detecting the state shown inFIG. 4Cin which the first determination component13aof the A portion cannot be seen and the second determination component13bof the B portion also cannot be seen, from the reference state shown inFIG. 4A(in which the first determination component13aof the A portion is visible and the second determination component13bof the B portion is not visible).

As a result, any relative positional deviation between the first resin molded body12and the second resin molded body13attributable to relative positional deviation (mismatching) between the upper die22and the lower die21constituting the molding die20can be easily detected.

This allows the occurrence of defective products due to relative positional deviation between the first resin molded body12and the second resin molded body13to be strictly managed.

Also, with the semiconductor device10in this embodiment, the upper die22and the lower die21constituting the molding die20are such that the shape of the upper die22disposed on the opposite side from the lower die21on the gate side, which serves as the bending start point of the leads11aand11bfunctioning as terminals, is in left and right asymmetry (shape offset).

Consequently, as described above, it is possible to provide the semiconductor device10with which relative positional deviation between the first resin molded body12and the second resin molded body13can be easily detected and managed.

The left and right asymmetry of the second resin molded body13provided for positional deviation detection and determination may be used as a mark (cathode mark) for polarity determination.

Furthermore, as described above, the semiconductor device10in this embodiment is a so-called side view (side-surface light emission) type of LED in which the semiconductor element15attached to a side surface emits light.

Therefore, the relative positional deviation between the first resin molded body12and the second resin molded body13in the up and down direction inFIG. 4Aleads to variance in the length of the terminals formed by bending the leads11aand11b, and may be a factor in variance in the orientation of the light emitting surface, variance in the thickness of the product, and other such problems. Thus, management of positional deviation in the up and down direction in the drawing is particularly important in this embodiment.

Method for Manufacturing Semiconductor Device10

With the method for manufacturing the semiconductor device10in this embodiment, the above-mentioned semiconductor device10is manufactured according to the flowchart shown inFIG. 5.

That is, as described above, with the semiconductor device10in this embodiment, in order to easily detect the relative positional deviation between the first resin molded body12and the second resin molded body13formed so as to sandwich the leads11aand11b(the lead frame11in the manufacturing process) from above and below using the molding die20shown inFIG. 3, the outer shape of the first resin molded body12is formed in left and right symmetry around the center axis C-C shown inFIG. 2in plan view, and the outer shape of the second resin molded body13is formed in left and right asymmetry around the center axis C-C shown inFIG. 2.

More specifically, in step S11, the lead frame11is placed at a predetermined position in the molding die20(lower die21) (seeFIG. 3).

Next, in step S12, the lower die21and the upper die22of the molding die20are closed, after which resin is injected into the molding die20from the gate21aof the lower die21.

Next, in step S13, once the injection of the resin from the gate21aof the lower die21is complete, the die20is cooled to solidify the injected resin, for example.

Next, in step S14, the first resin molded body12and the second resin molded body13molded in a state of being integrated with the lead frame11are taken out of the molding die20.

Next, in step S15, the semiconductor element15is attached in the recess14formed on the upper surface of the second resin molded body13.

Next, in step S16, after sealing, the individual semiconductor devices10are separated from the lead frame11.

With the semiconductor device10in this embodiment, the result of the above process is that the outer shape of the first resin molded body12is formed in left and right symmetry around the center axis C-C in plan view, and the outer shape of the second resin molded body13is formed in left and right asymmetry around the center axis C-C.

Consequently, a semiconductor device10can be manufactured with which the relative positional deviation between the first resin molded body12and the second resin molded body13can easily detected.

A semiconductor device30according to another embodiment of the present invention will now be described with reference toFIGS. 6A to 7B.

The semiconductor device30in this embodiment differs from Embodiment 1, which described a side view (side emission) type of LED in which the light emission surface is arranged on the side surface intersecting the mounting surface of the semiconductor device10, in that it is a so-called top view (top emission) type of LED (light emitting diode) in which a semiconductor element35(light emitting element) is disposed on the upper surface so that the light emission surface is arranged on the opposite side of the mounting surface.

The semiconductor device30according to this embodiment is a light emitting device, and is a so-called top view (top emission) type of LED (light emitting diode) having the light emitting surface on its upper surface. As shown inFIGS. 6A and 6B, the semiconductor device30mainly includes a semiconductor element35and a package38having two leads31aand31bfunctioning as a pair of positive and negative electrodes and a resin molded body37that integrally holds the leads31aand31b.

The leads31aand31band the semiconductor element35have substantially the same functions as those of the leads11aand11band the semiconductor element15in Embodiment 1 above, and therefore will not be described again in detail.

The resin molded body37has a second resin molded body33that is formed on the second surface (upper surface) side of the leads31aand31b(a lead frame31in the manufacturing process) and has a portion that becomes a recess34that opens on a top surface, and a first resin molded body32that is formed on the first surface (lower surface) side (gate side) of the leads31aand31b(the lead frame31in the manufacturing process).

The first resin molded body32and the second resin molded body33are integrally formed so as to sandwich the first surface and the second surface of the two leads31aand31b. The inner surface of the recess34of the package38is composed of the second resin molded body33, and the bottom of the recess34is composed of a part of the two leads31aand31band the second resin molded body33in between these leads. In other words, the leads31aand31bare exposed from the second resin molded body33at the bottom of the recess34.

The semiconductor element35is disposed on the bottom of the recess34, and is to electrically connected to the leads31aand31bvia wires or the like. Parts of the leads31aand31bextend to the outside of the resin molded body37and function as terminals.

As shown inFIGS. 6A and 6B, with this semiconductor device30, a package group is prepared in which a plurality of packages38having the recess14are disposed at predetermined positions, semiconductor elements35, etc., are attached in the recesses34, and finally this product is separated into individual packages.

In this package group38, a plurality of resin molded bodies37are arranged in a matrix on a single lead frame31including a plurality of holes36for forming the leads31aand31band hanger leads31cand31d.

The first resin molded body32is a resin portion disposed on the gate side with respect to the leads31aand31b(the lead frame31in the manufacturing process), and is molded by injecting resin into the molding die20in which the lead frame31has been placed (seeFIG. 3). The first resin molded body32has a gate mark32aconnected to the gate21aof the molding die20.

As shown inFIGS. 6A and 6B, the outer shape of the first resin molded body32is substantially square in plan view, and the first resin molded body32is disposed in left and right symmetry with respect to the center axis C′-C′.

InFIGS. 6A and 6B, the center axis C′-C′ is disposed along the left and right direction, so in the drawings the components are depicted in top and bottom symmetry (linear symmetry) around the center axis C′-C′. In the drawings, linear symmetry (top and bottom symmetry) centering on the center axis disposed along the left and right direction is referred to as “left and right symmetry,” and linear asymmetry (top and bottom asymmetry) is referred to as “left and right asymmetry.”

The second resin molded body33is a resin portion disposed on the cavity side with respect to the leads31aand31b(the lead frame31in the manufacturing process), and is molded by injecting resin into the molding die20in which the lead frame31has been placed (seeFIG. 3). The recess34in which the semiconductor element35is placed is formed in the second resin molded body33after molding.

As shown inFIGS. 6A and 6B, the second resin molded body33is disposed such that its outer shape is in left and right asymmetry with respect to the center axis C′-C′ in plan view. More specifically, the second resin molded body33is such that in the case where the A portion and the B portion inFIG. 6Bare compared, the B portion is different in that it is cut away.

Consequently, in the case where viewed from the first resin molded body32side, the overlapping portion of the first resin molded body32and the second resin molded body33looks different on the right and left. That is, as shown inFIG. 6B, a comparison of the A portion and the B portion reveals that in the A portion there is a portion (first determination component33a) where part of the second resin molded body33can be seen, and in the B portion, there is a portion (second determination component33b) where the second resin molded body33cannot be seen.

FIG. 6Bshows a state in which the first resin molded body32and the second resin molded body33are disposed in the proper positions.

With the semiconductor device30in this embodiment, as shown inFIG. 6B, in the case where the first resin molded body32and the second resin molded body33are disposed in the proper positions so as to sandwich the leads31aand31b(the lead frame31in the manufacturing to process), this results in a state in which either the left or right end of the second resin molded body33centered on the center axis C′-C′ (the first determination component33a) is visible, and the other one (the second determination component33b) is not visible, in the case where viewed from the first resin molded body32side.

That is, the second resin molded body33has the first determination component33aand the second determination component33bat the left and right ends around the center axis C′-C′ in order to detect whether there is any relative positional deviation between the first resin molded body32and the second resin molded body33.

The recess34is a recess portion formed on the upper surface of the second resin molded body33, that is, a surface of the second resin molded body33that is substantially parallel to the leads31aand31b, and the semiconductor element35is placed in this recess34.

Checking Relative Positional Deviation Between First Resin Molded Body32and Second Resin Molded Body33

As described above, with the semiconductor device30in this embodiment, the outer shape of the first resin molded body32is in left and right symmetry around the center axis C′-C′, and the outer shape of the second resin molded body33is in left and right asymmetry around the center axis C′-C′, so that any relative positional deviation between the first resin molded body32and the second resin molded body33disposed so as to sandwich the leads31aand31b(the lead frame31in the manufacturing process) can be easily checked.

Therefore, in the case where the first resin molded body32and the second resin molded to body33are molded at the proper positions, as shown inFIG. 6B, at the A portion the first determination component33a(the hatched part in the drawing) of the second resin molded body33can be seen, but at the B portion the second determination component33bis hidden by the first resin molded body32and cannot be seen, as viewed from the first resin molded body32side.

Here, the A and B portions are boundary portions between the first resin molded body32and the second resin molded body33and the lead31afunctioning as a terminal, and serve as the starting points of bending of the lead31a. Therefore, it is particularly important to accurately manage and bend the size (length) of the terminal formed by bending the lead31ain the A and B portions.

On the other hand, in the case where the first resin molded body32is molded so as to be displaced to the right side in the drawing (see the arrow) with respect to the second resin molded body33, as shown inFIG. 7A, in the case where viewed from the first resin molded body32side, the first determination component33a(the hatched portion in the drawing) of the second resin molded body33looks large in the A portion, and the second determination component33b(the hatched portion in the drawing) is also visible in the B portion.

Therefore, in the proper positions, the first determination component33ais visible in the A portion and the second determination component33bis not visible in the B portion, but in the case where a state is detected in which the second determination component33bis visible in the B portion, this makes it easy to determine that there is relative positional deviation between the first resin molded body32and the second resin molded body33.

Furthermore, in the case where the first resin molded body32is molded so as to be displaced to the left side in the drawing (see the arrow) with respect to the second resin molded body33, as shown inFIG. 7B, the first determination component33aof the second resin molded body33cannot be seen at the A portion, and the second determination component33balso cannot be seen at the B portion, as viewed from the first resin molded body32side.

Accordingly, in the proper positions, the first determination component33acan be seen at the A portion and the second determination component33bcannot be seen at the B portion, but in the case where a state is detected in which neither the first determination component33aat the A portion nor the second determination component33bat the B portion is visible, this makes it easy to determine that there is relative positional deviation between the first resin molded body32and the second resin molded body33.

With the semiconductor device30in this embodiment, as described above, in the case where the first resin molded body32disposed on the gate side is in the proper position, the A portion (the first determination component33a) of the second resin molded body33is not hidden by the first resin molded body32and can be seen in the case where the second resin molded body33disposed on the cavity side is viewed from the gate side near the lead31afunctioning as a terminal. On the other hand, the B portion (the second determination component33b) of the second resin molded body33is hidden by the first resin molded body32and cannot be seen.

That is, in this embodiment, in the case where the first resin molded body32and the second resin molded body33are molded at their proper positions relative to one another, a state in which the first determination component33aof the A portion can be seen and the second determination component33bof the B portion cannot be seen is used as a reference for the proper position.

Consequently, whether or not there is any relative positional deviation between the first resin molded body32and the second resin molded body33can be easily determined by detecting a change from this reference state, such as a state in which the first determination component33aof the A portion cannot be seen, or the second determination component33bof the B portion can be seen.

Also, with the semiconductor device30in this embodiment, the upper die22and the lower die21constituting the molding die20are such that the shape of the upper die22disposed on the opposite side from the lower die21on the gate side, which serves as the bending start point of the leads31aand31bfunctioning as a terminal, is in left and right asymmetry (shape offset).

Consequently, as described above, it is possible to provide the semiconductor device30with which relative positional deviation between the first resin molded body32and the second resin molded body33can be easily detected and managed.

As in Embodiment 1 above, the left and right asymmetry of the second resin molded body33provided for positional deviation detection and determination may be used as a mark (cathode mark) for polarity determination.

Furthermore, as described above, the semiconductor device30in this embodiment is a so-called top view (top emission) type of LED in which the semiconductor element35attached to the top surface emits light.

Therefore, the relative positional deviation between the first resin molded body32and the second resin molded body33in the left and right direction inFIG. 7A, etc. leads to variance in the length of the terminals formed by bending the lead31a, and may be a factor in causing a difference in height between the left and right terminals, variance in the orientation of the light emitting surface during substrate mounting, and other such problems. Thus, management of positional deviation in the left and right direction in the drawing is particularly important in this embodiment.

A semiconductor device40according to yet another embodiment of the present invention will now be described with reference toFIGS. 8A to 9B.

The semiconductor device40in this embodiment is the same as in Embodiment 2 in that it is a so-called top view (top emission) type of LED (light emitting diode) in which a semiconductor element45(light emitting element) is disposed on the upper surface. On the other hand, this embodiment differs from Embodiment 2 in that notches of different sizes are provided at two locations (above and below) of a second resin molded body43that is formed in left and right asymmetry around the center axis C′-C′.

The semiconductor device40according to this embodiment is a light emitting device, and is a so-called top view (top emission) type of LED (light emitting diode) having the light emitting surface on its upper surface. As shown inFIGS. 8A and 8B, the semiconductor device40mainly includes a semiconductor element45and a package48having two leads41aand41bfunctioning as a pair of positive and negative electrodes and a resin molded body47that integrally holds the leads41aand41b.

The leads41aand41band the semiconductor element45have substantially the same functions as those of the leads11aand11band the semiconductor element15in Embodiment 1 above, and will therefore not be described again in detail.

The resin molded body47has a second resin molded body43that is formed on the second surface (upper surface) side of the leads41aand41b(the lead frame41in the manufacturing process) and is provided with a portion that will become a recess44that opens on the upper surface, and a first resin molded body42that is formed on the first surface (lower surface) side (gate side) of the leads41aand41b(the lead frame41in the manufacturing process).

The first resin molded body42and the second resin molded body43are integrally formed so as to sandwich the first surface and the second surface of the two leads41aand41b. The inner side surface of the recess44of the package48is composed of the second resin molded body43, and the bottom surface of the recess44is composed of a part of the two leads41aand41band the second resin molded body43in between them. In other words, the leads41aand41bare exposed from the second resin molded body43at the bottom of the recess44.

The semiconductor element45is disposed on the bottom of the recess44, and is electrically connected to the leads41aand41bvia wires or the like. Parts of the leads41aand41brespectively extend to the outside of the resin molded body47and function as terminals.

As shown inFIGS. 8A and 8B, with this semiconductor device40, a package group in which a plurality of packages48having the recess44are disposed at specific locations is prepared, the semiconductor elements45and the like are attached in the recesses44, and finally the packages are separated from each other.

In the group of packages48, a plurality of resin molded bodies47are disposed in a matrix on one lead frame41including a plurality of holes46for forming the leads41aand41band the hanger leads41cand41d.

The first resin molded body42is a resin portion disposed on the gate side with respect to the leads41aand41b(the lead frame41in the manufacturing process), and is molded by injecting resin into the molding die20in which the lead frame41has been placed (seeFIG. 3). The first resin molded body42has a gate mark42aconnected to the gate21aof the molding die20.

As shown inFIGS. 8A and 8B, the outer shape of the first resin molded body42is substantially square in plan view, and is disposed in left and right symmetry with respect to the center axis C′-C′.

InFIGS. 8A and 8B, the center axis C′-C′ is disposed along the left and right direction.

The second resin molded body43is a resin portion disposed on the cavity side with respect to the leads41aand41b(the lead frame41in the manufacturing process), and is molded by injecting resin into the molding die20in which the lead frame41has been placed (seeFIG. 3). Also, a recess44in which the semiconductor element45is placed after molding is formed in the second resin molded body43.

As shown inFIGS. 8A and 8B, the second resin molded body43is disposed such that its outer shape is in left and right asymmetry with respect to the center axis C′-C′ in plan view. More specifically, the A portion and the B portion of the second resin molded body43inFIG. 8Bdiffer in the size of the notched portions.

As a result, in the case where viewed from the first resin molded body42side, the overlapping portions of the first resin molded body42and the second resin molded body43look different on the left and right. That is, in the case where the A portion and the B portion are compared, as shown inFIG. 8B, in the A portion there is a part where the second resin molded body43can be seen (the first determination component43a), and in the B portion there is a portion where the second resin molded body43cannot be seen (the second determination component43b).

FIG. 8Bshows a state in which the first resin molded body42and the second resin molded body43are disposed in the proper positions.

With the semiconductor device40in this embodiment, as shown inFIG. 88, in the case where the first resin molded body42and the second resin molded body43are disposed in the proper positions so that they sandwich the leads41aand41b(the lead frame41in the manufacturing process), then either the left or the right end of the second resin molded body43(the first determination component43a) centered on the center axis C′-C′ can be seen, and the other end (the second determination component43b) cannot be seen.

That is, in order to detect whether there is any relative positional deviation between the first resin molded body42and the second resin molded body43, the second resin molded body43has left and right the first determination component43aand the second determination component43bat its left and right ends centering on the center axis C′-C′.

The recess44is a recess portion formed on the upper surface of the second resin molded body43, that is, a surface substantially parallel to the leads41aand41b(the lead frame41in the manufacturing process) of the second resin molded body43, and the semiconductor element45is mounted in this recess.

Checking for Relative Positional Deviation Between First Resin Molded Body42and Second Resin Molded Body43

As described above, with the semiconductor device40in this embodiment, the first resin molded body42is formed in left and right symmetry around the center axis C′-C′, and the second resin molded body43is formed in left and right asymmetry around the center axis C′-C′, so as to make it easy to check for relative positional deviation between the first resin molded body42and the second resin molded body43, which are disposed so as to sandwich the leads41aand41b(the lead frame41in the manufacturing process).

Therefore, in the case where the first resin molded body42and the second resin molded body43are molded in their proper positions, as shown inFIG. 8B, viewed from the first resin molded body42side, at the A portion the first determination component43a(the hatched portion in the drawing) of the second resin molded body43can be seen, but at the B portion the second determination component43bis hidden by the first resin molded body42and cannot be seen.

Here, the A and B portions are boundary portions between the first resin molded body42and the second resin molded body43and the lead41afunctioning as a terminal, and serve as starting points for bending of the lead41a. Therefore, it is particularly important to accurately manage the size (length) of the terminal formed by bending the lead41ain the A and B portions.

On the other hand, in the case where the first resin molded body42is molded so as to be displaced to the right side in the drawing (see the arrow) with respect to the second resin molded body43, as shown inFIG. 9A, viewed from the first resin molded body42side, in the A portion the first determination component43a(the hatched portion in the drawing) of the second resin molded body43is plainly visible, and in the B portion the second determination component43b(the hatched portion in the drawing) is also visible.

Therefore, in the proper positions, the first determination component43ais visible in the A portion and the second determination component43bis not visible in the B portion, but in the case where a state is detected in which the second determination component43bis visible in the B portion, it can be easily determined that there is relative positional deviation between the first resin molded body42and the second resin molded body43.

Furthermore, in the case where the first resin molded body42is molded so as to be displaced to the left side in the drawing (see the arrow) with respect to the second resin molded body43, as shown inFIG. 9B, viewed from the first resin molded body42side, in the A portion the first determination component43aof the second resin molded body43cannot be seen, and in the B portion the second determination component43balso cannot be seen.

Accordingly, in the proper positions, in the A portion the first determination component43ais visible and in the B portion the second determination component43bis not visible, but in the case where a state is detected in which the first determination component43ain the A portion and the second determination component43bin the B portion cannot both be seen, it can be easily determined that there is relative positional deviation between the first resin molded body42and the second resin molded body43.

With the semiconductor device40in this embodiment, as described above, in the case where the first resin molded body42disposed on the gate side is in the proper position, then in the case where the second resin molded body43disposed on the cavity side is viewed from the gate side, the A portion (the first determination component43a) of the second resin molded body43is not hidden by the first resin molded body42and can be seen. On the other hand, the B portion (the second determination component43b) of the second resin molded body43is hidden by the first resin molded body42and cannot be seen.

That is, in this embodiment, in the case where the first resin molded body42and the second resin molded body43are molded in their proper positions relative to each other, a state in which the first determination component43aof the A portion can be seen and the second determination component43bof the B portion cannot be seen is used as a reference for the proper positions.

Consequently, whether or not there is any relative positional deviation between the first resin molded body42and the second resin molded body43can be easily determined by detecting a change from this reference state, such as a state in which the first determination component43aof the A portion cannot be seen or in which the second determination component43bof the B portion can be seen.

Also, with the semiconductor device40in this embodiment, in regard to the upper die22and the lower die21constituting the molding die20, the shape of the upper die22disposed on the opposite side from the lower die21on the gate side, which serves as the bending starting point for the leads41aand41bfunctioning as a terminal, is in left and right asymmetry (shape offset).

Consequently, as discussed above, it is possible to provide a semiconductor device40with which relative positional deviation between the first resin molded body42and the second resin molded body43can be easily detected and managed.

As in Embodiment 1 above, the left/right asymmetrical shape of the second resin molded body43provided for positional deviation detection and determination may be used as a mark for polarity determination (cathode mark).

Furthermore, as mentioned above, the semiconductor device40of this embodiment is a so-called top view (top emission) type of LED in which the semiconductor element45attached to the upper surface emits light, just as in Embodiment 2 above.

Therefore, relative positional deviation between the first resin molded body42and the second resin molded body43in the left and right direction shown inFIG. 9A, etc., can lead to variance in the length of the terminals formed by bending the leads41aand41b, and there is the risk that there will be a difference in height between the left and right terminals, which may cause problems such as variance in the orientation of the light emitting surface in substrate mounting. Therefore, in this embodiment, management of positional deviation in the left and right direction in the drawing is particularly important.

A semiconductor device50according to yet another embodiment of the present invention will now be described with reference toFIGS. 10A to 11B.

The semiconductor device50in this embodiment differs from the semiconductor devices10,30, and40in Embodiments 1 to 3, in which the first resin molded body and the second resin molded body are formed by injection molding, in that a first resin molded body52and a second resin molded body53are transfer-molded LEDs that have been molded by transfer molding.

As shown inFIGS. 10A and 10B, the semiconductor device50in this embodiment mainly includes a semiconductor element55(not shown) and a package58having two leads51aand51bfunctioning as a pair of positive and negative electrodes and a resin molded body57that integrally holds the leads51aand51b. The resin molded body57has a lens54.

The semiconductor element55has substantially the same function as the semiconductor element15in Embodiment 1, and therefore will not be described in detail here.

Also, although not shown inFIG. 10A, etc., the recess in which the semiconductor element55is attached shall be assumed to be disposed at the position included by the lens54. Recesses are provided to the leads51aand51bthemselves.

The resin molded body57has the second resin molded body53that is formed on the second surface (upper surface) side of the leads51aand51b(the lead frame51in the manufacturing process), and the first resin molded body52formed on the first surface (lower surface) side (gate side) of the leads51aand51b(the lead frame51in the manufacturing process).

The first resin molded body52and the second resin molded body53are integrally formed so as to sandwich the first surface and the second surface of the two leads51aand51b. The inner side surface of the recess of the package58consists of the lead51aor the lead52a.

The semiconductor element55is disposed on the bottom of a recess and is electrically connected to the leads51aand51bby wires or the like. Parts of the leads51aand51bextend to the outside of the resin molded body57and function as terminals.

As shown inFIGS. 10A and 10B, with this semiconductor device50, a package group is prepared in which a plurality of packages58having recesses are disposed at specific positions, and semiconductor elements55, etc., are attached in the recesses, and the group is finally separated into units.

In the group of packages58, a plurality of resin molded bodies57are disposed in a matrix.

As shown inFIGS. 10A and 10B, the outer shape of the first resin molded body52is substantially rectangle in plan view, and the first resin molded body52is disposed in left and right symmetry with respect to the center axis C′-C′.

InFIGS. 10A and 10B, the center axis C′-C′ is disposed in the left and right direction.

As shown inFIGS. 10A and 10B, the outer shape of the second resin molded body53is in left and right asymmetry with respect to the center axis C′-C′ in plan view. More specifically, the second resin molded body53is different in that in the case where the A and B portions inFIG. 10Bare compared, a cutout is provided in the A portion.

Consequently, in the case where viewed from the first resin molded body52side, the overlapping portion of the first resin molded body52and the second resin molded body53looks different on the left and right. That is, in the case where the A portion and the B portion are compared, as shown inFIG. 10B, in the A portion there is a portion where part of the second resin molded body53can be seen (a first determination component53a), and in the B portion there is a portion where the second resin molded body53cannot be seen (a second determination component53b).

FIG. 10Bshows the state in the case where the first resin molded body52and the second resin molded body53are disposed in their proper positions.

With the semiconductor device50in this embodiment, as shown inFIG. 10B, in the case where the first resin molded body52and the second resin molded body53are disposed in their proper positions so as to sandwich the leads51aand51b(the lead frame51in the manufacturing process), viewed from the first resin molded body52side, one of the left and right ends of the second resin molded body53centered on the center axis C′-C′ (the first determination component53a) can be seen, and the other (the second determination component53b) cannot be seen.

That is, in order to detect whether or not there is any relative positional deviation between the first resin molded body52and the second resin molded body53, the second resin molded body53has the first determination component53aand the second determination component53bat the left and right ends centering on the center axis C′-C′.

The lens54is provided to the upper surface of the second resin molded body53, that is, to a surface of the second resin molded body53that is substantially parallel to the leads51aand51b(the lead frame51in the manufacturing process).

Confirmation of Relative Positional Deviation Between First Resin Molded Body52and Second Resin Molded Body53

As described above, with the semiconductor device50in this embodiment, the outer shape of the first resin molded body52is in left and right symmetry around the center axis C′-C′, and the outer shape of the second resin molded body53is in left and right asymmetry around the center axis C′-C′, to make it easy to check for relative positional deviation between the first resin molded body52and the second resin molded body53disposed so as to sandwich the leads51aand51b(the lead frame51in the manufacturing process).

Therefore, in the case where the first resin molded body52and the second resin molded body53are molded in their proper positions, as shown inFIG. 10B, viewed from the first resin molded body52side, in the A portion the first determination component53a(the hatched portion in the drawing) of the second resin molded body53can be seen, and in the B portion the second determination component53bis hidden by the first resin molded body52and cannot be seen.

Here, the A and B portions are boundary portions between the first resin molded body52and the second resin molded body53and the lead51afunctioning as a terminal, and serve as starting points for the bending of the lead51a. Therefore, it is particularly important to accurately manage the size (length) of the terminal formed by bending the lead51ain the A and B portions.

On the other hand, in the case where the first resin molded body52is molded so as to be displaced to the right side in the drawing (see the arrow) with respect to the second resin molded body53, as shown inFIG. 1IA, viewed from the first resin molded body52side, in the A portion the first determination component53a(the hatched portion in the drawing) of the second resin molded body53is plainly visible, and in the B portion the second determination component53b(the hatched portion in the drawing) is also visible.

Therefore, in the proper positions, the first determination component53ais visible in the A portion and the second determination component53bis not visible in the B portion, but in the case where a state in which the second determination component53bis visible in the B portion is detected, this makes it easy to determine that there is relative positional deviation between the first resin molded body52and the second resin molded body53.

Furthermore, in the case where the first resin molded body52is molded so as to be displaced to the left side (see the arrow) with respect to the second resin molded body53, as shown inFIG. 11B, viewed from the first resin molded body52side, in the A portion the first determination component53aof the second resin molded body53cannot be seen, and in the B portion the second determination component53balso cannot be seen.

For this reason, in the proper positions, in the A portion the first determination component53acan be seen, and in the B portion the second determination component53bcannot be seen, but in the case where a state is detected in which neither the first determination component53ain the A portion nor the second determination component53bin the B portion is visible, this makes it easy to determine that there is relative positional deviation between the first resin molded body52and the second resin molded body53.

With the semiconductor device50in this embodiment, as described above, in the case where the first resin molded body52disposed on the gate side is in the proper position, in the case where the second resin molded body53disposed on the cavity side in the vicinity of the lead51afunctioning as a terminal is viewed from the gate side, the A portion (first determination component53a) of the second resin molded body53is not hidden by the first resin molded body52and can be seen. On the other hand, the B portion (the second determination component53b) of the second resin molded body53is hidden by the first resin molded body52and cannot be seen.

That is, in this embodiment, in the case where the first resin molded body52and the second resin molded body53are molded in their proper positions, a state in which the first determination component53ain the A portion can be seen and the determination component53bin the B portion cannot be seen is used as a reference for the proper position.

Consequently, a change from this reference state, such as a state in which the first determination component53aof the A portion cannot be seen, or in which the second determination component53bof the B portion can be seen, can be detected, which makes it easy to determine whether there is any relative positional deviation between the first resin molded body52and the second resin molded body53.

Also, with the semiconductor device50in this embodiment, the upper die22and the lower die21constituting the molding die20are such that the shape of the upper die22disposed on the opposite side from the lower die21on the gate side, which serves as the bending start point of the leads51a,51bfunctioning as a terminal, is in left and right asymmetry (shape offset).

Consequently, as described above, it is possible to provide the semiconductor device50with which relative positional deviation between the first resin molded body52and the second resin molded body53can be easily detected and managed.

As in Embodiment 1 above, the left and right asymmetry of the second resin molded body53provided for positional deviation detection and determination may be used as a mark (cathode mark) for polarity determination.

Furthermore, as described above, the semiconductor device50in this embodiment is a transfer molded type of LED.

Therefore, the relative positional deviation between the first resin molded body52and the second resin molded body53in the left and right direction inFIG. 11A, etc., leads to variance in the length of the leads51aand51bfunctioning as terminals, and may be a factor in causing a difference in height between the left and right terminals, variance in the orientation of the light emitting surface during substrate mounting, and other such problems. Thus, management of positional deviation in the left and right direction in the drawing is particularly important in this embodiment.

Method for Manufacturing Semiconductor Device50

With the method for manufacturing the semiconductor device50in this embodiment, the above-mentioned transfer molded type of semiconductor device50is manufactured according to the flowchart shown inFIG. 12.

That is, as described above, the semiconductor device50in this embodiment is such that in order to easily detect relative positional deviation between the first resin molded body52and the second resin molded body53, which are molded so as to sandwich the lead frame51from above and below using the molding die20shown inFIG. 4, in plan view, the outer shape of the first resin molded body52is formed in left and right symmetry around the center axis C-C, and the outer shape of the second resin molded body53is formed in left and right asymmetry around the center axis C-C.

More specifically, in step S21a semiconductor element is attached to the recess of the lead frame51.

Next, in step S22the lead frame51is placed at a specific position in the molding die20(lower die21) (seeFIG. 3).

Next, in step S23the lower die21and the upper die22of the molding die20are closed, after which resin is injected from the gate21aof the lower die21into the molding die20.

Next, in step S24, after the injection of the resin from the gate21aof the lower die21is complete, the molding die20is cooled to solidify the injected resin, for example.

Next, in step S25the first resin molded body52and the second resin molded body53molded in a state of being integrated with the lead frame51are taken out of the molding die20.

Next, in step S26the individual semiconductor elements55are cut away from the lead frame51into units.

With the semiconductor device50in this embodiment, in the above steps, in plan view, the outer shape of the first resin molded body52is formed in left and right symmetry around the center axis C′-C′, and the outer shape of the second resin molded body53is formed in left and right asymmetry around the center axis C′-C′.

Consequently, a semiconductor device50can be manufactured with which relative positional deviation between the first resin molded body52and the second resin molded body53can be easily detected.

Other Embodiments

Embodiments of the present invention were described above, but the present invention is not limited to or by these embodiments, and various modifications are possible in a range which does not depart from the gist of the invention.

In the above embodiments, an example was given in which two determination components (a first determination component and a second determination component) were provided to a second resin molded body in left and right asymmetry in order to detect relative positional deviation between the first resin molded body and the second resin molded body. However, the present invention is not limited to this.

For instance, the determination components used to determine positional deviation are not limited to two as in Embodiments 1 to 4, and instead just one may be used, or three or more may be used.

In the above embodiments, an example was given in which, in the proper positions serving as a reference, the first determination component was visible and the second determination component was not visible, and this made it possible for even the direction of positional deviation to be specified between the first resin molded body and the second resin molded body. However, the present invention is not limited to this.

For instance, in the case where it is not necessary to specify the direction of positional deviation, the first determination component and the second determination component may both be visible at the proper positions serving as a reference, or neither the first determination component nor the second determination component may be visible.

In the above embodiments, an example was given in which the semiconductor device was such that a semiconductor element was placed on the side of the second resin molded body that was molded in left and right asymmetry around the center axis. However, the present invention is not limited to this.

For instance, the configuration may be such that a semiconductor element is placed on the side of the first resin molded body that is molded in left and right symmetry.

In the above embodiments, an example was given of a semiconductor device in which a gate mark for injecting the resin was provided on the side of the first resin molded body that was molded in left and right symmetry around the center axis has been described as an example. However, the present invention is not limited to this.

For instance, the gate mark may be provided on the side of the second resin molded body that is molded in left and right asymmetry.

In the above embodiments, an example was given of the configuration of a semiconductor device in which the leads11aand11b, etc., were bent and used as terminals. However, the present invention is not limited to this.

For instance, the present invention may be applied to a semiconductor device having a configuration in which leads are not bent as terminals.

In the above embodiments, an LEI) or other such light-emitting device was given as an example of a semiconductor device to which this invention is applied. However, the present invention is not limited to this.

For instance, the present disclosure can be broadly applied to semiconductor devices including a first resin molded body and a second resin molded body disposed on both surfaces of a lead frame.

The semiconductor device of the present disclosure has the effect of allowing relative positional deviation between resin molded bodies disposed so as to sandwich a lead frame to be easily detected, and therefore can be broadly applied to semiconductor devices that include lead frames.