SEMICONDUCTOR DEVICE

According to one embodiment, a semiconductor device includes: a first frame; a first chip on the first frame; a second frame spaced apart from the first frame in a first direction; a second chip on the second frame; and a first joint terminal above the second chip. The first frame includes a first terminal portion extending toward the second frame. The first joint terminal includes a second terminal portion extending toward the first frame. The second terminal portion includes first and second projecting portions each of which projects toward the first frame and which are spaced apart from each other in a second direction. An end portion of the first projecting portion and an end portion of the second projecting portion are each joined on the first terminal portion.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is based upon and claims the benefit of priority from Japanese Patent Application No. 2022-048217, filed Mar. 24, 2022, the entire contents of which are incorporated herein by reference.

FIELD

BACKGROUND

A semiconductor device using a lead frame is known.

DETAILED DESCRIPTION

In general, according to one embodiment, a semiconductor device includes: a first frame; a first chip provided on the first frame; a second frame spaced apart from the first frame in a first direction; a second chip provided on the second frame; and a first joint terminal provided above the second chip and electrically coupled to the second chip. The first frame includes a first terminal portion extending toward the second frame. The first joint terminal includes a second terminal portion extending toward the first frame. The second terminal portion includes a first projecting portion and a second projecting portion each of which projects toward the first frame and which are spaced apart from each other in a second direction intersecting the first direction. An end portion of the first projecting portion and an end portion of the second projecting portion are each joined on the first terminal portion.

Hereinafter, embodiments will be described with reference to the accompanying drawings. In the following description, constituent elements having substantially the same function and configuration will be assigned the same reference numeral or symbol and repetitive descriptions may be omitted. All of the descriptions of an embodiment are applicable as descriptions of another embodiment, unless explicitly or self-evidently excluded.

1. First Embodiment

A semiconductor device according to a first embodiment will be described. Hereinafter, a semiconductor device using a lead frame will be described as an example. The semiconductor device is used for, e.g., a transistor package.

1.1 Configuration of Semiconductor Device

The configuration of the semiconductor device according to the present embodiment will be described with reference toFIG.1andFIG.2.FIG.1is a plan view showing an example of a configuration of a semiconductor device. In the example shown inFIG.1, a resin is indicated by the solid line. The internal constituent elements covered with the resin are indicated by the broken line. The outside of the resin (a part not covered with the resin) is indicated by the solid line.FIG.2is a plan view showing an example of the internal configuration of the semiconductor device. The example shown inFIG.2omits the resin.

As shown inFIG.1, a semiconductor device1includes a lead frame10, a chip11, an electrode12, an electrode12a, a joint member13, a joint terminal14, an electrode terminal15, an interconnect16, an electrode terminal17, a lead frame20, a chip21, an electrode22, an electrode22a, a joint member23, a joint terminal24, an electrode terminal25, an interconnect26, and a resin30. In the following description, an X direction is substantially parallel to a surface of the lead frame10and corresponds to, for example, a direction from the lead frame10to the lead frame20(the direction from the electrode terminal17to the electrode terminal15). A Y direction is substantially parallel to the surface of the lead frame10and corresponds to, for example, a direction from the lead frame10to the electrode terminal17. A Z direction is substantially perpendicular to the surface of the lead frame10and corresponds to a direction from the lead frame10to the chip11.

The resin30is, for example, an epoxy resin. Part of the lead frame10, all of the chip11, all of the electrode12, all of the electrode12a, all of the joint member13, all of the joint terminal14, part of the electrode terminal15, all of the interconnect16, part of the electrode terminal17, part of the lead frame20, all of the chip21, all of the electrode22, all of the electrode22a, all of the joint member23, all of the joint terminal24, part of the electrode terminal25, and all of the interconnect26are covered with the resin30.

As shown inFIG.2, the lead frame10is a frame configured to support and fix the chip11. The lead frame10is, for example, a drain electrode. The lead frame10is formed into, for example, a plate shape. The end far from the electrode terminal17of ends in the Y direction of the lead frame10extends in the Y direction. The lead frame10is formed of a conductive material and may be, for example, a metal material. The lead frame10will be described later in detail.

The chip11is, for example, an integrated circuit (IC) chip. The chip11is provided on the lead frame10.

The electrode12is, for example, a gate electrode. The electrode12is provided on the chip11. The electrode12is formed of a conductive material and may be, for example, a metal material. The electrode12may include, for example, a joint terminal.

The electrode12ais, for example, a source electrode. The electrode12ais formed into, for example, a substantially letter L shape when viewed from a top (when viewed from the top of the drawing sheet ofFIG.2). The electrode12ais provided on the chip11. The electrode12ais formed of a conductive material and may be, for example, a metal material.

The joint member13is, for example, a solder joint. The joint member13is formed into, for example, a substantially letter L shape when viewed from the top. The joint member13is provided on the electrode12a. The joint member13electrically couples the electrode12ato the joint terminal14.

The joint terminal14electrically couples, for example, the electrode12ato the electrode terminal17. The joint terminal14is formed into, for example, a substantially letter L shape when viewed from the top. The joint terminal14is provided on the joint member13. The joint terminal14is electrically coupled to the chip11with the joint member13and the electrode12aintervening therebetween. The joint terminal14is formed of a conductive material and may be, for example, a metal material. The joint terminal14will be described later in detail.

The electrode terminal15is, for example, a gate terminal. The electrode terminal15is spaced apart from the lead frame10in the Y direction. The end far from the lead frame10of ends in the Y direction of the electrode terminal15extends in the Y direction. The electrode terminal15is formed of a conductive material and may be, for example, a metal material.

The electrode terminal15includes a base portion15a, a bending portion15b, and a joint portion15c. For example, the electrode terminal15is bent upward on the boundary between the base portion15aand the bending portion15b, and is bent in the Y direction on the boundary between the bending portion15band the joint portion15c. The surface of the base portion15aand the surface of the joint portion15care substantially parallel to each other. The surface of the joint portion15cis positioned above the surface of the base portion15a. In other words, the electrode terminal15has a step in the Y direction.

The interconnect16is, for example, a bonding wire. One end of the interconnect16is joined to the electrode12. The other end of the interconnect16is joined to the joint portion15cof the electrode terminal15. The interconnect16electrically couples the electrode12to the electrode terminal15. The interconnect16is formed of a conductive material and may be, for example, a metal material. In the case of the electrode12having a joint terminal, the joint terminal of the electrode12, instead of the interconnect16, may be electrically coupled to the electrode terminal15.

The electrode terminal17is, for example, a source terminal. The electrode terminal17is spaced apart from the electrode terminal15in the X direction. The electrode terminal17is spaced apart from the lead frame10in the Y direction. The end far from the lead frame10of ends in the Y direction of the electrode terminal17extends in the Y direction. The electrode terminal17is formed of a conductive material and may be, for example, a metal material.

The electrode terminal17includes a base portion17a, a bending portion17b, and a joint portion17c. For example, the electrode terminal17is bent upward on the boundary between the base portion17aand the bending portion17b, and is bent in the Y direction on the boundary between the bending portion17band the joint portion17c. The surface of the base portion17aand the surface of the joint portion17care substantially parallel to each other. The surface of the joint portion17cis positioned above the surface of the base portion17a. In other words, the electrode terminal17has a step in the Y direction.

The lead frame20is a frame configured to support and fix the chip21. The lead frame20is, for example, a drain electrode. The lead frame20is formed into, for example, a plate shape. The lead frame20is spaced apart from the lead frame10in the X direction. The end far from the electrode terminal25of ends in the Y direction of the lead frame20extends in the Y direction. The lead frame20is formed of a conductive material and may be, for example, a metal material.

The chip21is, for example, an IC chip. The chip21is provided on the lead frame20.

The electrode22is, for example, a gate electrode. The electrode22is provided on the chip21. The electrode22is formed of a conductive material and may be, for example, a metal material. The electrode22may include, for example, a joint terminal.

The electrode22ais, for example, a source electrode. The electrode22ais formed into, for example, a substantially letter L shape when viewed from the top. The electrode22ais provided on the chip21. The electrode22ais formed of a conductive material and may be, for example, a metal material.

The joint member23is, for example, a solder joint. The joint member23is formed into, for example, a substantially letter L shape when viewed from the top. The joint member23is provided on the electrode22a. The joint member23electrically couples the electrode22ato the joint terminal24.

The joint terminal24electrically couples, for example, the electrode22ato the lead frame10. The joint terminal24is formed into, for example, a substantially letter L shape when viewed from the top. The joint terminal24is provided on the joint member23. The joint terminal24is electrically coupled to the chip21with the joint member23and the electrode22aintervening therebetween. The joint terminal24is formed of a conductive material and may be, for example, a metal material. The joint terminal24will be described later in detail.

The electrode terminal25is, for example, a gate terminal. The electrode terminal25is spaced apart from the electrode terminal15in the X direction. The electrode terminal25is spaced apart from the lead frame20in the Y direction. The end far from the lead frame20of ends in the Y direction of the electrode terminal25extends in the Y direction. The electrode terminal25is formed of a conductive material and may be, for example, a metal material.

The electrode terminal25includes a base portion25a, a bending portion25b, and a joint portion25c. For example, the electrode terminal25is bent upward on the boundary between the base portion25aand the bending portion25b, and is bent in the Y direction on the boundary between the bending portion25band the joint portion25c. The surface of the base portion25aand the surface of the joint portion25care substantially parallel to each other. The surface of the joint portion25cis positioned above the surface of the base portion25a. In other words, the electrode terminal25has a step in the Y direction.

The interconnect26is, for example, a bonding wire. One end of the interconnect26is joined to the electrode22. The other end of the interconnect26is joined to the joint portion25cof the electrode terminal25. The interconnect26electrically couples the electrode22to the electrode terminal25. The interconnect26is formed of a conductive material and may be, for example, a metal material. In the case of the electrode22having a joint terminal, the joint terminal of the electrode22, instead of the interconnect26, may be electrically coupled to the electrode terminal25.

The joint terminal14will be described in detail with reference toFIG.2.

As shown inFIG.2, the joint terminal14includes a base portion14aand a terminal portion T1. The terminal portion T1is positioned on a side close to the electrode terminal17in the Y direction of the joint terminal14. The terminal portion T1is formed into, for example, a substantially rectangular shape when viewed from the top. The terminal portion T1includes a bending portion14b, a bridge portion14c, a bending portion14d, and a joint portion14e.

For example, the joint terminal14is bent upward on the boundary between the base portion14aand the bending portion14b, and is bent in the Y direction on the boundary between the bending portion14band the bridge portion14c. For example, the joint terminal14is bent downward on the boundary between the bridge portion14cand the bending portion14d, and is bent in the Y direction on the boundary between the bending portion14dand the joint portion14e. The surface of the base portion14a, the surface of the bridge portion14c, and the surface of the joint portion14eare substantially parallel to each other. The surface of the bridge portion14cis positioned above the surface of the base portion14aand the surface of the joint portion14e. In other words, the joint terminal14has a step in the Y direction.

As shown inFIG.2, the terminal portion T1is provided on the electrode terminal17. More specifically, the joint portion14eof the joint terminal14is joined on the joint portion17cof the electrode terminal17. This electrically couples the terminal portion T1to the electrode terminal17. In other words, the joint terminal14is electrically coupled to the electrode terminal17with the terminal portion T1intervening therebetween.

The lead frame10will be described in detail with reference toFIG.3.FIG.3is an enlarged view showing some of the internal configuration of the semiconductor device1(the enlarged view of the region R1inFIG.2). The example shown inFIG.3omits the chips11and21, the electrodes22and22a, and the joint member23.

As shown inFIG.3, the lead frame10includes a base portion10aand a terminal portion T2. The terminal portion T2is positioned on a side close to the joint terminal24(close to the lead frame20) in the X direction of the lead frame10. The terminal portion T2extends toward the joint terminal24. The terminal portion T2is formed into, for example, a substantially letter U shape when viewed from the top. The terminal portion T2includes a bending portion10band a joint portion10c.

For example, the lead frame10is bent upward on the boundary between the base portion10aand the bending portion10b, and is bent in the X direction on the boundary between the bending portion10band the joint portion10c. The surface of the base portion10aand the surface of the joint portion10care substantially parallel to each other. The surface of the joint portion10cis positioned above the surface of the base portion10a. In other words, the lead frame10has a step in the X direction.

The terminal portion T2includes projecting portions10dand10eeach of which projects toward the joint terminal24(the lead frame20). In other words, the end close to the joint terminal24of ends in the X direction of the terminal portion T2is divided into two parts. The projecting portion10dand the projecting portion10eare spaced apart from each other in the Y direction. The terminal portion T2may include three or more projecting portions. In this case, these projecting portions are spaced apart from each other in the Y direction.

The joint terminal24will be described in detail with reference toFIG.3.

As shown inFIG.3, the joint terminal24includes a base portion24aand a terminal portion T3. The terminal portion T3is positioned on a side close to the lead frame10in the X direction of the joint terminal24. The terminal portion T3extends toward the lead frame10. The terminal portion T3is formed into, for example, a substantially letter Y shape when viewed from the top. The terminal portion T3includes a bending portion24b, a bridge portion24c, bending portions24fand24g, and joint portions24hand24i.

For example, the joint terminal24is bent upward on the boundary between the base portion24aand the bending portion24b, and is bent in the X direction on the boundary between the bending portion24band the bridge portion24c. For example, the joint terminal24is bent downward on the boundary between the bridge portion24cand the bending portion24f, and is bent in the X direction on the boundary between the bending portion24fand the joint portion24h. For example, the joint terminal24is bent downward on the boundary between the bridge portion24cand the bending portion24g, and is bent in the X direction on the boundary between the bending portion24gand the joint portion24i. The surface of the base portion24a, the surface of the bridge portion24c, the surface of the joint portion24h, and the surface of the joint portion24iare substantially parallel to each other. The surface of the bridge portion24cis positioned above the surface of the base portion24a, the surface of the joint portion24h, and the surface of the joint portion24i. In other words, the joint terminal24has a step in the X direction.

The terminal portion T3includes projecting portions24dand24eeach of which projects toward the lead frame10. In other words, the end close to the lead frame10of ends in the X direction of the terminal portion T3is divided into two parts. Projecting portions24dand24eare spaced apart from each other in the Y direction. The projecting portion24dincludes part of the bridge portion24c, all of the bending portion24f, and all of the joint portion24h. The projecting portion24eincludes part of the bridge portion24c, all of the bending portion24g, and all of the joint portion24i. The terminal portion T3may include three or more projecting portions. In this case, these projecting portions are spaced apart from each other in the Y direction.

As shown inFIG.3, the terminal portion T3is provided on the terminal portion T2. More specifically, the joint portion24hof the terminal portion T3is joined on the joint portion10cof the terminal portion T2. The joint portion24iof the terminal portion T3is joined on the joint portion10cof the terminal portion T2. In other words, the end portion of the projecting portion24dof the terminal portion T3is joined on the projecting portion10dof the terminal portion T2. The end portion of the projecting portion24eof the terminal portion T3is joined on the projecting portion10eof the terminal portion T2. That is, the terminal portion T3and the terminal portion T2are joined together via two joint surfaces. Hereinafter, a combination of the joint surfaces, the end portion of the terminal portion T2in contact with the joint surfaces, and the end portion of the terminal portion T3in contact with the joint surfaces will be referred to as a “joint part”. This electrically couples the terminal portion T3to the terminal portion T2. In other words, the joint terminal24is electrically coupled to the lead frame10with the terminal portions T3and T2intervening therebetween.

For example, the lead frame10, the electrode terminals15and17, the lead frame20, and the electrode terminal25shown inFIG.2correspond to part of a lead frame (not shown), and also correspond to the remainder of the lead frame (not shown) cut and removed through a manufacturing process.

FIG.4is a perspective view showing some of the internal configuration of the semiconductor device1(the perspective view of the region R1inFIG.2). The example shown inFIG.4omits the electrode22.

As shown inFIG.4, the end portion of the projecting portion24dis provided on the projecting portion10d. The end portion of the projecting portion24dis joined to the projecting portion10dvia the joint member27formed on the upper surface of the projecting portion10d. The joint member27is, for example, a solder joint. The joint member27electrically couples the terminal portion T2to the terminal portion T3. The end portion of the projecting portion24eis provided on the projecting portion10e. The end portion of the projecting portion24eis joined to the projecting portion10evia a joint member27formed on the upper surface of the projecting portion10e.

An end surface of the terminal portion T3(the surface of the terminal portion T3, the surface being sandwiched between the projecting portions24dand24eand facing the lead frame10(this surface will be also referred to as a “surface P2”)) is positioned closer to the lead frame20as compared to an end surface of the terminal portion T2(the surface of the terminal portion T2, the surface being sandwiched between the projecting portions10dand10eand facing the lead frame20(this surface will also be referred to as a “surface P1”)).

With the above structure, an upper part of a space (hereinafter, also referred to as a “space S1”) surrounded by the terminal portion T2, the joint member27, the terminal portion T3, the joint member23, the electrode22a, the chip21, and the lead frame20is not blocked by the terminal portions T2and T3. While the projecting portion24dhas a surface which faces the projecting portion24eand is referred to as a “surface P3” and the projecting portion24ehas a surface which faces the projecting portion24dand is referred to as a “surface P4”, the semiconductor device1has a region surrounded by the surfaces P1, P2, P3, and P4. In other words, the terminal portions T2and T3(the projecting portions10d,10e,24d, and24e) form an opening (hereinafter, also referred to as an “opening OP1”). That is, the semiconductor device1has the opening OP1formed by the terminal portions T2and T3. A region surrounded by the surfaces P1, P2, P3, and P4corresponds to the opening OP1. Both ends in the Y direction of the space S1are not blocked.

A cross-sectional structure of the semiconductor device1will be described with reference toFIG.5.FIG.5is a cross-sectional view (the cross-sectional view taken along the line I-I inFIG.1) showing an example of a structure of the semiconductor device1.

As shown inFIG.5, the bending portion10benables the lead frame10to be bent in such a manner that the surface of the joint portion10cis positioned above the surface of the base portion10a. The chip11is provided on the lead frame10. The electrode12ais provided on the chip11. The joint member13is provided on the electrode12a. The joint terminal14is provided on the joint member13.

The chip21is provided on the lead frame20. The electrode22ais provided on the chip21. The joint member23is provided on the electrode22a. The joint terminal24is provided on the joint member23. The bending portions24band24fenable the joint terminal24to be bent in such a manner that the surface of the bridge portion24cis positioned above the surface of the base portion24aand the surface of the joint portion24h.

The joint portion24his provided on the joint portion10c. The joint portion24his joined to the joint portion10cvia the joint member27.

The lead frame10, the chip11, the electrode12a, the joint member13, the joint terminal14, the lead frame20, the chip21, the electrode22a, the joint member23, and the joint terminal24are covered with the resin30. The space S1is filled with the resin30.

1.2 Method of Manufacturing Semiconductor Device

A method of manufacturing the semiconductor device1will be described. In the present embodiment, a plurality of semiconductor devices1are formed using a single lead frame. Before the formation of the resin30, internal constituent elements (hereinafter, also referred to as “constituent element groups”) of the semiconductor device1shown inFIG.2are arranged in a matrix pattern on the single lead frame. These constituent element groups are sealed with the resin30. Hereinafter, a formation process of the resin30will be described with reference toFIG.6.FIG.6is a diagram illustrating a formation process of the resin30. The example inFIG.6shows a method (the transfer method) of forming the resin30using a mold50with respect to a plurality of constituent element groups provided in a row in the X direction on the lead frame40.

As shown inFIG.6, the resin30is injected from an injection port of the mold50. The resin30flows in the X direction (the direction from the left side of the drawing sheet ofFIG.6toward the right side of the drawing sheet ofFIG.6) from the injection port of the mold50to the distal end of the mold50. By this, the plurality of constituent element groups provided on the lead frame40are sealed with the resin30between the injection port of the mold50and the distal end of the mold50.

After the formation of the resin30, the lead frame40is cut and removed, thereby resulting in the formation of the plurality of semiconductor devices1.

A flow of the resin30during its formation will be described with reference toFIG.7.FIG.7is a diagram illustrating a flow of the resin30. In the example shown inFIG.7, a flow of the resin30being injected in order to cover the constituent element groups of the semiconductor device1shown inFIG.2and heading to the space S1is indicated by an arrow.

As shown inFIG.7, the resin30is injected from the X direction side (the side close to the lead frame10). The resin30travels by detouring along the outside of the projecting portion24dto flow into the space S1. The resin30travels by detouring along the outside of the projecting portion24eto flow into the space S1. The resin30travels downward through the opening OP1formed by the terminal portions T2and T3, and flows into the space S1.

1.3 Advantageous Effect of Present Embodiment

The configuration according to the present embodiment can improve the yield of the semiconductor device. Hereinafter, the advantageous effects will be described.

With the configuration in which the end portion of the terminal portion T3of the joint terminal24is joined on the terminal portion T2via the joint member27formed on the upper surface of the terminal portion T2of the lead frame10, a residual stress of the joint member27becomes larger as an area of the joint member27formed on the upper surface of the terminal portion T2(the area of the joint member27in contact with the terminal portions T2and T3) increases. For this reason, depending on the area of the joint member27formed on the upper surface of the terminal portion T2, the residual stress of the joint member27may increase a strain of the joint part between the terminal portion T2and the terminal portion T3. In addition, peeling between the terminal portion T2and the terminal portion T3at the joint part may occur.

On the other hand, in the present embodiment, the terminal portion T2includes the projecting portions10dand10eprojecting toward the joint terminal24. The projecting portion10dand the projecting portion10eare spaced apart from each other in the Y direction. The terminal portion T3includes projecting portions24dand24eeach of which projects toward the lead frame10. The projecting portion24dand the projecting portion24eare spaced apart from each other in the Y direction.

The end portion of the projecting portion24dof the terminal portion T3is joined on the projecting portion10dvia the joint member27formed on the upper surface of the projecting portion10dof the terminal portion T2. Therefore, the area of the joint member27formed on the upper surface of the projecting portion10dis smaller than the area of the joint member27that is formed on the upper surface of the terminal portion T2in the case of the terminal portion T3having no projecting portion. For this reason, the residual stress of the joint member27formed on the upper surface of the projecting portion10dis smaller than the residual stress of the joint member27that is formed on the upper surface of the terminal portion T2in the case of the terminal portion T3having no projecting portion.

The end portion of the projecting portion24eof the terminal portion T3is joined on the projecting portion10evia the joint member27formed on the upper surface of the projecting portion10eof the terminal portion T2. Therefore, the area of the joint member27formed on the upper surface of the projecting portion10eis smaller than the area of the joint member27that is formed on the upper surface of the terminal portion T2in the case of the terminal portion T3having no projecting portion. For this reason, the residual stress of the joint member27formed on the upper surface of the projecting portion10eis smaller than the residual stress of the joint member27that is formed on the upper surface of the terminal portion T2in the case of the terminal portion T3having no projecting portion.

This can suppress the strain of the joint part between the terminal portions T2and T3and also suppress the occurrence of peeling between the terminal portions T2and T3at the joint part.

With a configuration in which the terminal portions T2and T3extend in the direction in which the resin30is injected and the end portion of the terminal portion T3is joined on the terminal portion T2, the resin30travels by detouring along the outside of the terminal portion T3to flow into the space S1. However, the terminal portions T2and T3extending in the direction in which the resin30is injected may obstruct the flow of the resin30, thereby causing a void in the space S1or resulting in the space S1not being filled with the resin30.

On the other hand, in the present embodiment, the end portion of the projecting portion24dof the terminal portion T3is provided on the projecting portion10dof the terminal portion T2. The end portion of the projecting portion24eof the terminal portion T3is provided on the projecting portion10eof the terminal portion T2. The surface P2of the terminal portion T3, which is the surface which is sandwiched between the projecting portions24dand24eand faces the lead frame10, is positioned closer to the lead frame20as compared to the surface P1of the terminal portion T2, which is the surface which is sandwiched between the projecting portions10dand10eand faces the lead frame20. In other words, the semiconductor device1has the opening OP1formed by the terminal portions T2and T3. Accordingly, during the formation process of the resin30, the resin30not only travels by detouring along the outside of the projecting portions24dand24eto flow into the space S1but also travels downward through the opening OP1to flow into the space S1. This can improve the filling property of the resin30. This enables a resin whose curing time is relatively short to be used as the resin30, for example.

A difference in elongation due to heat between the terminal portion T2and the resin30becomes larger as an area of the resin30covering the terminal portion T2(the area of the resin30in contact with the terminal portion T2) increases. Therefore, depending on the area of the resin30covering the terminal portion T2, peeling between the terminal portion T2and the resin30may occur due to heat. With respect to the terminal portion T3, similarly, depending on the area of the resin30covering the terminal portion T3(the area of the resin30in contact with the terminal portion T3), peeling between the terminal portion T3and the resin30may occur due to heat.

On the other hand, in the present embodiment, the semiconductor device1has the opening OP1formed by the terminal portions T2and T3. Accordingly, the area of the resin30covering the terminal portion T2is smaller than the area of the resin30that covers the terminal portion T2in the case of the semiconductor device1having no opening. Accordingly, a difference in elongation due to heat between the terminal portion T2and the resin30becomes smaller as compared to such a difference in the case of the semiconductor device1having no opening. The area of the resin30covering the terminal portion T3is smaller than the area of the resin30that covers the terminal portion T3in the case of the semiconductor device1having no opening. Accordingly, a difference in elongation due to heat between the terminal portion T3and the resin30becomes smaller as compared to such a difference in the case of the semiconductor device1having no opening. This can suppress peeling between the terminal portion T2and the resin30and peeling between the terminal portion T3and the resin30.

1.4 First Modification

A semiconductor device according to a first modification of the first embodiment will be described. The semiconductor device1according to the first modification of the first embodiment differs from that of the first embodiment in terms of a shape of the terminal portion T2of the lead frame10. The following will omit a description of a configuration similar to that of the first embodiment and will mainly provide a description of a configuration different from that of the first embodiment.

1.4.1 Configuration of Semiconductor Device

The configuration of the semiconductor device1according to the present modification will be described with reference toFIG.8.FIG.8is a perspective view showing some of the internal configuration of the semiconductor device1(the view corresponding toFIG.4showing the first embodiment). The example shown inFIG.8omits the electrode22.

As shown inFIG.8, the terminal portion T2is formed into, for example, a substantially rectangular shape when viewed from the top. The end close to the joint terminal24of ends in the X direction of the terminal portion T2is not divided into two or more parts.

The end portion of the projecting portion24dis joined on the terminal portion T2. More specifically, the end portion of the projecting portion24dis joined on the terminal portion T2via the joint member27formed on the upper surface of the terminal portion T2. The end portion of the projecting portion24eis joined on the terminal portion T2. More specifically, the end portion of the projecting portion24eis joined on the terminal portion T2via the joint member27formed on the upper surface of the terminal portion T2. That is, the terminal portion T3and the terminal portion T2are joined together via two joint surfaces.

An end surface of the terminal portion T3(the surface P2of the terminal portion T3, the surface being sandwiched between the projecting portions24dand24eand facing the lead frame10) is positioned closer to the lead frame20as compared to an end surface of the terminal portion T2(the surface of the terminal portion T2, the surface facing the lead frame20(this surface will also be referred to as a “surface P5”)).

With the above structure, the upper part of the space S1is not blocked by the terminal portions T2and T3. The semiconductor device1includes a region surrounded by the surfaces P2, P3, P4, and P5. In other words, the terminal portions T2and T3(the terminal portion T2and the projecting portions24dand24e) form the opening OP1. That is, the semiconductor device1has the opening OP1formed by the terminal portions T2and T3. A region surrounded by the surfaces P2, P3, P4, and P5corresponds to the opening OP1. Both ends in the Y direction of the space S1are not blocked.

1.4.2 Advantageous Effect of Present Modification

The present modification produces advantageous effects similar to those of the first embodiment.

1.5 Second Modification

A semiconductor device according to a second modification of the first embodiment will be described. The semiconductor device1according to the second modification of the first embodiment differs from that of the first embodiment in terms of a shape of the terminal portion T3of the joint terminal24. The following will omit a description of a configuration similar to that of the first embodiment and will mainly provide a description of a configuration different from that of the first embodiment.

1.5.1 Configuration of Semiconductor Device

The configuration of the semiconductor device1according to the present modification will be described with reference toFIG.9.FIG.9is a perspective view showing some of the internal configuration of the semiconductor device1(the view corresponding toFIG.4showing the first embodiment). The example shown inFIG.9omits the electrode22.

As shown inFIG.9, the terminal portion T3is formed into, for example, a substantially rectangular shape when viewed from the top. The terminal portion T3includes the bending portion24b, the bridge portion24c, a bending portion24j, and a joint portion24k.

For example, the joint terminal24is bent upward on the boundary between the base portion24aand the bending portion24b, and is bent in the X direction on the boundary between the bending portion24band the bridge portion24c. For example, the joint terminal24is bent downward on the boundary between the bridge portion24cand the bending portion24j, and is bent in the X direction on the boundary between the bending portion24jand the joint portion24k. The surface of the base portion24a, the surface of the bridge portion24c, and the surface of the joint portion24kare substantially parallel to each other. The surface of the bridge portion24cis positioned above the surface of the base portion24aand the surface of the joint portion24k. In other words, the joint terminal24has a step in the X direction.

The end close to the lead frame10of ends in the X direction of the terminal portion T3is not divided into two or more parts.

The end portion of the terminal portion T3is joined on the projecting portion10d. More specifically, the end portion of the terminal portion T3is joined on the projecting portion10dvia the joint member27formed on the upper surface of the projecting portion10d. The end portion of the terminal portion T3is joined on the projecting portion10e. More specifically, the end portion of the terminal portion T3is joined on the projecting portion10evia the joint member27formed on the upper surface of the projecting portion10e. That is, the terminal portion T3and the terminal portion T2are joined together via two joint surfaces.

An end surface of the terminal portion T3(the surface of the terminal portion T3, the surface facing the lead frame10(this surface will be also referred to as a “surface P6”)) is positioned closer to the lead frame20as compared to an end surface of the terminal portion T2(the surface P1of the terminal portion T2, the surface being sandwiched between the projecting portions10dand10eand facing the lead frame20).

With the above structure, the upper part of the space S1is not blocked by the terminal portions T2and T3. While the projecting portion10dhas a surface which faces the projecting portion10eand is referred to as a “surface P7” and the projecting portion10ehas a surface which faces the projecting portion10dand is referred to as a “surface P8”, the semiconductor device1has a region surrounded by the surfaces P1, P6, P7, and P8. In other words, the terminal portions T2and T3(the projecting portions10dand10eand the terminal portion T3) form the opening OP1. That is, the semiconductor device1has the opening OP1formed by the terminal portions T2and T3. A region surrounded by the surfaces P1, P6, P7, and P8corresponds to the opening OP1. Both ends in the Y direction of the space S1are not blocked.

1.5.2 Advantageous Effect of Present Modification

The present modification produces advantageous effects similar to those of the first embodiment.

2. Second Embodiment

A semiconductor device according to a second embodiment will be described. The semiconductor device1according to the second embodiment differs from that of the first embodiment in terms of an internal configuration. The following will omit a description of a configuration similar to that of the first embodiment and will mainly provide a description of a configuration different from that of the first embodiment.

2.1 Configuration of Semiconductor Device

The configuration of the semiconductor device1according to the present embodiment will be described with reference toFIG.10andFIG.11.FIG.10is a plan view showing an example of a configuration of the semiconductor device1. In the example shown inFIG.10, a resin is indicated by the solid line. The internal constituent elements covered with the resin are indicated by the broken line. The outside of the resin is indicated by the solid line.FIG.11is a plan view showing an example of the internal configuration of the semiconductor device1. The example shown inFIG.11omits the resin.

As shown inFIG.10, the semiconductor device1includes the lead frame10, the chip11, the electrode12, the electrode12a, the joint member13, the joint terminal14, the electrode terminal15, the interconnect16, the electrode terminal17, and the resin30.

Part of the lead frame10, all of the chip11, all of the electrode12, all of the electrode12a, all of the joint member13, all of the joint terminal14, part of the electrode terminal15, all of the interconnect16, and part of the electrode terminal17are covered with the resin30.

As shown inFIG.11, the lead frame10is formed into, for example, a plate shape. The end far from the electrode terminal17of ends in the Y direction of the lead frame10extends in the Y direction.

The chip11is provided on the lead frame10.

The electrode12ais formed into, for example, a substantially letter L shape when viewed from a top (when viewed from the top of the drawing sheet ofFIG.11). The electrode12ais provided on the chip11.

The joint member13is formed into, for example, a substantially letter L shape when viewed from the top. The joint member13is provided on the electrode12a. The joint member13electrically couples the electrode12ato the joint terminal14.

The joint terminal14is formed into, for example, a substantially letter L shape when viewed from the top. The joint terminal14is provided on the joint member13. The joint terminal14will be described later in detail.

The electrode terminal17is spaced apart from the electrode terminal15in the X direction. The electrode terminal17is spaced apart from the lead frame10in the Y direction. The end far from the lead frame10of ends in the Y direction of the electrode terminal17extends in the Y direction. The electrode terminal17will be described later in detail.

The joint terminal14will be described in detail with reference toFIG.12.FIG.12is an enlarged view showing some of the internal configuration of the semiconductor device1(the enlarged view of the region R2inFIG.11). The example shown inFIG.12omits the chip11, the electrodes12and12a, and the joint member13.

As shown inFIG.12, the joint terminal14includes a base portion14aand a terminal portion T1. The terminal portion T1is positioned on a side close to the electrode terminal17in the Y direction of the joint terminal14. The terminal portion T1extends toward the electrode terminal17. The terminal portion T1is formed into, for example, a substantially letter Y shape when viewed from the top. The terminal portion T1includes the bending portion14b, the bridge portion14c, bending portions14fand14g, and joint portions14hand14i.

For example, the joint terminal14is bent upward on the boundary between the base portion14aand the bending portion14b, and is bent in the Y direction on the boundary between the bending portion14band the bridge portion14c. For example, the joint terminal14is bent downward on the boundary between the bridge portion14cand the bending portion14f, and is bent in the Y direction on the boundary between the bending portion14fand the joint portion14h. For example, the joint terminal14is bent downward on the boundary between the bridge portion14cand the bending portion14g, and is bent in the Y direction on the boundary between the bending portion14gand the joint portion14i. The surface of the base portion14a, the surface of the bridge portion14c, the surface of the joint portion14h, and the surface of the joint portion14iare substantially parallel to each other. The surface of the bridge portion14cis positioned above the surface of the base portion14a, the surface of the joint portion14h, and the surface of the joint portion14i. In other words, the joint terminal14has a step in the Y direction.

The terminal portion T1includes projecting portions14d2and14e2each of which projects toward the electrode terminal17. In other words, the end close to the electrode terminal17of ends in the Y direction of the terminal portion T1is divided into two parts. The projecting portions14d2and14e2are spaced apart from each other in the X direction. The projecting portion14d2includes part of the bridge portion14c, all of the bending portion14f, and all of the joint portion14h. The projecting portion14e2includes part of the bridge portion14c, all of the bending portion14g, and all of the joint portion14i. The terminal portion T1may include three or more projecting portions. In this case, these projecting portions are spaced apart from each other in the X direction.

The electrode terminal17will be described in detail with reference toFIG.12.

As shown inFIG.12, the electrode terminal17is formed into, for example, a substantially letter U shape when viewed from the top. The electrode terminal17includes a base portion17a, a bending portion17b, and a joint portion17c.

For example, the electrode terminal17is bent upward on the boundary between the base portion17aand the bending portion17b, and is bent in the Y direction on the boundary between the bending portion17band the joint portion17c. The surface of the base portion17aand the surface of the joint portion17care substantially parallel to each other. The surface of the joint portion17cis positioned above the surface of the base portion17a. In other words, the electrode terminal17has a step in the Y direction.

The electrode terminal17includes the projecting portions17dand17eeach of which projects toward the joint terminal14(toward the lead frame10). In other words, the end close to the joint terminal14of ends in the Y direction of the electrode terminal17is divided into two parts. The projecting portions17dand17eare spaced apart from each other in the X direction. The electrode terminal17may include three or more projecting portions. In this case, these projecting portions are spaced apart from each other in the X direction.

As shown inFIG.12, the end portion of the terminal portion T1is provided on the electrode terminal17. More specifically, the joint portion14hof the terminal portion T1is joined on the joint portion17cof the electrode terminal17. The joint portion14iof the terminal portion T1is joined on the joint portion17cof the electrode terminal17. In other words, the end portion of the projecting portion14d2of the terminal portion T1is joined on the projecting portion17dof the electrode terminal17. The end portion of the projecting portion14e2of the terminal portion T1is joined on the projecting portion17eof the electrode terminal17. That is, the terminal portion T1and the electrode terminal17are joined together via two joint surfaces. Hereinafter, a combination of the joint surfaces, the end portion of the terminal portion T1in contact with the joint surfaces, and the end portion of the electrode terminal17in contact with the joint surfaces will be referred to as a “joint part”. This electrically couples the terminal portion T1to the electrode terminal17. In other words, the joint terminal14is electrically coupled to the electrode terminal17with the terminal portion T1intervening therebetween.

The lead frame10and the electrode terminals15and17shown inFIG.11correspond to part of a lead frame (not shown), and also correspond to the remainder of the lead frame (not shown) cut and removed through a manufacturing process.

FIG.13is a perspective view (the perspective view of the region R2inFIG.11) showing some of the internal configuration of the semiconductor device1. The example shown inFIG.13omits the electrode12.

As shown inFIG.13, the end portion of the projecting portion14d2is provided on the projecting portion17d. The end portion of the projecting portion14d2is joined on the projecting portion17dvia the joint member18formed on the upper surface of the projecting portion17d. The joint member18is, for example, a solder joint. The joint member18electrically couples the terminal portion T1to the electrode terminal17. The end portion of the projecting portion14e2is provided on the projecting portion17e. The end portion of the projecting portion14e2is joined on the projecting portion17evia a joint member18formed on the upper surface of the projecting portion17e.

An end surface of the terminal portion T1(the surface of the terminal portion T1, the surface being sandwiched between the projecting portions14d2and14e2and facing the electrode terminal17(this surface will be also referred to as a “surface P9”)) is positioned closer to the lead frame10as compared to an end surface of the electrode terminal17(the surface of the electrode terminal17, the surface being sandwiched between the projecting portions17dand17eand facing the lead frame10(this surface will be also referred to as a “surface P10”)).

With the above structure, an upper part of a space (hereinafter, also referred to as a “space S2”) surrounded by the electrode terminal17, the joint member18, the terminal portion T1, the joint member13, the electrode12a, the chip11, and the lead frame10is not blocked by the terminal portion T1and the electrode terminal17. While the projecting portion14d2has a surface which faces the projecting portion14e2and is referred to as a “surface P11” and the projecting portion14e2has a surface which faces the projecting portion14d2and is referred to as a “surface P12”, the semiconductor device1has a region surrounded by the surfaces P9, P10, P11, and P12. In other words, the terminal portion T1and the electrode terminal17(the projecting portions14d2,14e2,17d, and17e) form an opening (hereinafter, also referred to as an “opening OP2”). That is, the semiconductor device1has the opening OP2formed by the terminal portion T1and the electrode terminal17. A region surrounded by the surfaces P9, P10, P11, and P12corresponds to the opening OP2. Both ends in the X direction of the space S2are not blocked.

A cross-sectional structure of the semiconductor device1will be described with reference toFIG.14.FIG.14is a cross-sectional view (the cross-sectional view taken along the line II-II inFIG.10) showing an example of a structure of the semiconductor device1.

As shown inFIG.14, the bending portion17benables the electrode terminal17to be bent in such a manner that the surface of the joint portion17cis positioned above the surface of the base portion17a.

The chip11is provided on the lead frame10. The electrode12ais provided on the chip11. The joint member13is provided on the electrode12a. The joint terminal14is provided on the joint member13. The bending portions14band14genable the joint terminal14to be bent in such a manner that the surface of the bridge portion14cis positioned above the surface of the base portion14aand the surface of the joint portion14i.

The joint portion14iis provided on the joint portion17c. The joint portion14iis joined on the joint portion17cvia the joint member18.

The lead frame10, the chip11, the electrode12a, the joint member13, the joint terminal14, and the electrode terminal17are covered with the resin30. The space S2is filled with the resin30.

2.2 Advantageous Effect of Present Embodiment

In the present embodiment, the terminal portion T1has a configuration similar to that of the terminal portion T3in the first embodiment. The electrode terminal17has a configuration similar to that of the terminal portion T2in the first embodiment. The terminal portion T1and the electrode terminal17are joined together in a similar manner to the terminal portion T2and the terminal portion T3joined together in the first embodiment. As with the first embodiment, this can suppress the strain of the joint part between the terminal portion T1and the electrode terminal17and also suppress the occurrence of peeling between the terminal portions T1and the electrode terminal17at the joint part.

In the present embodiment, the semiconductor device1has the opening OP2formed by the terminal portion T1and the electrode terminal17. Accordingly, during the formation process of the resin30, when the resin30is injected from the X direction side, the resin30not only flows directly into the space S2but also travels downward through the opening OP2to flow into the space S2. As with the first embodiment, this can improve the filling property of the resin30.

Furthermore, as with the first embodiment, the present embodiment can suppress peeling between the terminal portion T1and the resin30and peeling between the electrode terminal17and the resin30.

As described above, the configuration according to the present embodiment can improve the yield of the semiconductor device, as with the first embodiment.

2.3 First Modification

A semiconductor device according to a first modification of the second embodiment will be described. The semiconductor device1according to the first modification of the second embodiment differs from that of the second embodiment in terms of a shape of the electrode terminal17. The following will omit a description of a configuration similar to that of the second embodiment and will mainly provide a description of a configuration different from that of the second embodiment.

2.3.1 Configuration of Semiconductor Device

The configuration of the semiconductor device1according to the present modification will be described with reference toFIG.15.FIG.15is a perspective view showing some of the internal configuration of the semiconductor device1(the view corresponding toFIG.13showing the second embodiment). The example shown inFIG.15omits the electrode12.

As shown inFIG.15, the electrode terminal17is formed into, for example, a substantially rectangular shape when viewed from the top. The end close to the joint terminal14of ends in the Y direction of the electrode terminal17is not divided into two or more parts.

The end portion of the projecting portion14d2is joined on the electrode terminal17. More specifically, the end portion of the projecting portion14d2is joined on the electrode terminal17via the joint member18formed on the upper surface of the electrode terminal17. The end portion of the projecting portion14e2is joined on the electrode terminal17. More specifically, the end portion of the projecting portion14e2is joined on the electrode terminal17via the joint member18formed on the upper surface of the electrode terminal17. That is, the terminal portion T1and the electrode terminal17are joined together via two joint surfaces.

An end surface of the terminal portion T1(the surface P9of the terminal portion T1, the surface being sandwiched between the projecting portions14d2and14e2and facing the electrode terminal17) is positioned closer to the lead frame10as compared to an end surface of the electrode terminal17(the surface of the electrode terminal17, the surface facing the lead frame10(this surface will be also referred to as a “surface P13”)).

With the above structure, the upper part of the space S2is not blocked by the terminal portion T1and the electrode terminal17. The semiconductor device1includes a region surrounded by the surfaces P9, P11, P12, and P13. In other words, the terminal portion T1and the electrode terminal17(the projecting portions14d2and14e2and the electrode terminal17) form the opening OP2. That is, the semiconductor device1has the opening OP2formed by the terminal portion T1and the electrode terminal17. A region surrounded by the surfaces P9, P11, P12, and P13corresponds to the opening OP2. Both ends in the X direction of the space S2are not blocked.

2.3.2 Advantageous Effect of Present Modification

The present modification produces advantageous effects similar to those of the second embodiment.

2.4 Second Modification

A semiconductor device according to a second modification of the second embodiment will be described. The semiconductor device1according to the second modification of the second embodiment differs from that of the second embodiment in terms of a shape of the terminal portion T1of the joint terminal14. The following will omit a description of a configuration similar to that of the second embodiment and will mainly provide a description of a configuration different from that of the second embodiment.

2.4.1 Configuration of Semiconductor Device

The configuration of the semiconductor device1according to the present modification will be described with reference toFIG.16.FIG.16is a perspective view showing some of the internal configuration of the semiconductor device1(the view corresponding toFIG.13showing the second embodiment). The example shown inFIG.16omits the electrode12.

As shown inFIG.16, the terminal portion T1is formed into, for example, a substantially rectangular shape when viewed from the top. The terminal portion T1includes the bending portion14b, the bridge portion14c, a bending portion14j, and a joint portion14k.

For example, the joint terminal14is bent upward on the boundary between the base portion14aand the bending portion14b, and is bent in the Y direction on the boundary between the bending portion14band the bridge portion14c. For example, the joint terminal14is bent downward on the boundary between the bridge portion14cand the bending portion14j, and is bent in the Y direction on the boundary between the bending portion14jand the joint portion14k. The surface of the base portion14a, the surface of the bridge portion14c, and the surface of the joint portion14kare substantially parallel to each other. The surface of the bridge portion14cis positioned above the surface of the base portion14aand the surface of the joint portion14k. In other words, the joint terminal14has a step in the Y direction.

The end close to the electrode terminal17of ends in the Y direction of the terminal portion T1is not divided into two or more parts.

The end portion of the terminal portion T1is joined on the projecting portion17d. More specifically, the end portion of the terminal portion T1is joined on the projecting portion17dvia the joint member18formed on the upper surface of the projecting portion17d. The end portion of the terminal portion T1is joined on the projecting portion17e. More specifically, the end portion of the terminal portion T1is joined on the projecting portion17evia the joint member18formed on the upper surface of the projecting portion17e. That is, the terminal portion T1and the electrode terminal17are joined together via two joint surfaces.

An end surface of the terminal portion T1(the surface of the terminal portion T1, the surface facing the electrode terminal17(this surface will be also referred to as a “surface P14”)) is positioned closer to the lead frame10as compared to an end surface of the electrode terminal17(the surface P10of the electrode terminal17, the surface P10being sandwiched between the projecting portions17dand17eand facing the lead frame10).

With the above structure, the upper part of the space S2is not blocked by the terminal portion T1and the electrode terminal17. While the projecting portion17dhas a surface which faces the projecting portion17eand is referred to as a “surface P15” and the projecting portion17ehas a surface which faces the projecting portion17dand is referred to as a “surface P16”, the semiconductor device1has a region surrounded by the surfaces P10, P14, P15, and P16. In other words, the terminal portion T1and the electrode terminal17(the terminal portion T1and the projecting portions17dand17e) form the opening OP2. That is, the semiconductor device1has the opening OP2formed by the terminal portion T1and the electrode terminal17. A region surrounded by the surfaces P10, P14, P15, and P16corresponds to the opening OP2. Both ends in the X direction of the space S2are not blocked.

2.4.2 Advantageous Effect of Present Modification

The present modification produces advantageous effects similar to those of the second embodiment.

As described above, a semiconductor device (1) according to an embodiment includes: a first frame (10); a first chip (11) provided on the first frame; a second frame (20) spaced apart from the first frame in a first direction (X); a second chip (21) provided on the second frame; and a first joint terminal (24) provided above the second chip and electrically coupled to the second chip. The first frame (10) includes a first terminal portion (T2) extending toward the second frame (20). The first joint terminal (24) includes a second terminal portion (T3) extending toward the first frame (10). The second terminal portion (T3) includes a first projecting portion (24d) and a second projecting portion (24e) each of which projects toward the first frame (10) and which are spaced apart from each other in a second direction (Y) intersecting the first direction (X). An end portion of the first projecting portion (24d) and an end portion of the second projecting portion (24e) are each joined on the first terminal portion (T2).

The embodiments are not limited to those described in the above, and various modifications can be made.