Semiconductor component

A microcomputer module 21 and a memory module 31 are mounted on a mounting substrate 42 in such a manner that first outer leads 23 of the microcomputer module 21 and first outer leads 33 of the memory module 31 are connected together in an overlapped manner.

BACKGROUND OF THE INVENTION 
1. Field of the Invention 
The present invention relates to a semiconductor component. 
2. Description of the Prior Art 
Recently, home electric appliances and information devices have been made 
smaller in size in quick tempo up to the degree which permits the users to 
carry them. One of the factors which have promoted such reduction in size 
of home electric appliances and information devices is a single chip 
microcomputer. The single chip microcomputer comprises a central 
processing unit (hereinafter referred to as "CPU"), memories such as ROM 
and RAM, and such functional circuits as timers, all of which are formed 
on a single semiconductor chip. The use of the single chip microcomputer 
has promoted the reduction in size of a mounting substrate and of home 
electric appliances and information devices. 
However, for small-sized devices requiring large capacities of memories, 
which have recently been developed positively, there is adopted a method 
in which a CPU and a memory of a large capacity are mounted on separate 
semiconductor chips, then the semiconductor chip ("CPU chip" hereinafter) 
provided with the CPU is packaged into a microcomputer module, likewise 
the semiconductor chip ("memory chip" hereinafter) provided with the 
large-capacity memory is packaged into a large-capacity memory module 
("memory module" hereinafter), then the microcomputer module and the 
memory module are mounted onto a mounting substrate, and both modules are 
connected with each other through wiring formed on the upper surface of 
the mounting substrate. This is because as the memory capacity increases, 
the area occupied by memory becomes larger and it becomes impossible to 
provide both large-capacity memory and CPU on one semiconductor chip. 
FIG. 16 is a perspective view showing the construction of a conventional IC 
module, in which are illustrated both microcomputer module and memory 
module. In the same figure, the reference numeral 121 denotes a 
microcomputer module and the numeral 131 denotes a memory module. The 
microcomputer module 121 plays the role of controlling a small-sized 
device, while the memory module 131 plays the role of storing data 
necessary for the control of the small-sized device made by the 
microcomputer module 121. 
Numeral 122 denotes the body of the microcomputer module. Numeral 123 
denotes a first outer lead for connection between the modules, the first 
outer lead 123 being provided plurally on the microcomputer module body 
122 and drawn out to the exterior from a side face of the body 122 up to a 
position flush with the underside of the body 122. Numeral 124 denotes a 
second outer lead provided plurally on the microcomputer module body 122 
and drawn out to the exterior from side faces of the body 122 up to 
positions flush with the underside of the body 122. The first outer leads 
123 permit the microcomputer module 121 to receive data from the memory 
module 131 and permit the microcomputer module 121 to transmit a control 
signal to the memory module 131 for controlling the operation of the 
module 131. The second outer leads 124 permit the microcomputer module 121 
to be supplied with electric power and permit the same module to receive 
and transmit information signals from and to the exterior of the 
small-sized device. 
Numeral 132 denotes the body of the memory module. Numeral 133 denotes a 
first outer lead for connection between both modules, the first outer lead 
133 being provided plurally on the memory module body 132 and drawn out to 
the exterior from a side face of the body 132 up to a position flush with 
the underside of the body 132. Numeral 134 denotes a second outer lead 
provided plurally on the memory module body 132 and drawn out to the 
exterior from side faces of the body 132 up to positions flush with the 
underside of the body 132. The first outer leads 133 permit the memory 
module 131 to receive a control signal from the microcomputer module 121 
and transmit data to the module 121. The second outer leads 134 permit the 
memory module 131 to be supplied with electric power and permit the same 
module to receive an information signal from the exterior of the 
small-sized device. 
The CPU chip sealed in the microcomputer module body 122 and the first and 
second outer leads 123, 124 are electrically connected with each other. 
Likewise, the memory chip sealed in the memory module body 132 and the 
first and second outer leads 133, 134 are electrically connected with each 
other. 
FIG. 17 is a perspective view showing the construction of a conventional 
semiconductor component. The semiconductor component shown therein 
comprises the microcomputer module and the memory module both illustrated 
in FIG. 16 and both mounted on a mounting substrate. The numeral 141 in 
FIG. 17 represents the semiconductor component. 
Numeral 142 denotes a mounting substrate. Numeral 143 denotes a connecting 
wire formed on the upper surface of the mounting substrate 142. The 
connecting wire 143 connects the portion where the first outer leads 123 
of the microcomputer module 121 contacts the upper surface of the mounting 
substrate 142 with the portion where the first outer leads 133 of the 
memory module 131 opposed thereto contacts the upper surface of the 
substrate 142. The other constituent elements are the same as those 
indicated by the same reference numerals in FIG. 16, so detailed 
explanations thereof are here omitted. 
The conventional semiconductor component 141 illustrated in FIG. 17 is 
constructed as follows. The microcomputer module 121 and the memory module 
131 are mounted on the substrate 142 at the shortest distance between both 
modules. Then, the portion where the first outer leads 123 of the 
microcomputer module 121 contacts the upper surface of the substrate 142 
and the portion where the outer leads 133 of the memory module 131 opposed 
thereto contact the upper surface of the substrate 142 are connected with 
each other by using the connecting wires 143 formed on the upper surface 
of the substrate 142. 
Reference will be made below to the operation of such conventional 
semiconductor component. 
Main operations are as follows. The microcomputer module 121 transmits a 
control signal for controlling the operation of the memory module 131 to 
the memory module through the first outer leads 133. The memory module 131 
receives the control signal through the first outer leads 133. In 
accordance with this control signal the memory module 121 operates and 
transmits data to the microcomputer module 121 through the first outer 
leads 133, which data is necessary for the microcomputer module 121 to 
control the small-sized device. The microcomputer module 121 receives the 
data through the first outer leads 123. In accordance with this data the 
microcomputer module 121 controls the small-sized device and transmits an 
information signal to the exterior of the device through the second outer 
leads 124. 
SUMMARY OF THE INVENTION 
The conventional IC modules are constructed as above, so in the case where 
two IC modules are mounted on a mounting substrate to constitute a 
semiconductor component, the portion where the first outer leads of one IC 
module contact the upper surface of the mounting substrate and the portion 
where the first outer leads of the other IC module opposed thereto contact 
the upper surface of the substrate are connected with each other using 
connecting wires formed on the substrate upper surface. Therefore, it is 
necessary to ensure a space for the connecting wires on the upper surface 
of the substrate. This connecting wire area has so far been a great 
obstacle to a further reduction in size of home electric appliances and 
information devices. 
The conventional semiconductor components are constructed as above, 
therefore, it is necessary to form connecting wires on the upper surface 
of the mounting substrate. These connecting wires have so far been a great 
obstacle to a further reduction in size of home electric appliances and 
information devices. 
A method for solving the above-mentioned problem is disclosed, for example, 
in JP-A No. 2-63150. FIG. 18 is a perspective view showing the 
construction of a conventional IC module which is shown in JP-A No. 
2-63150. In the same figure, the numeral 151 denotes an IC module. 
Further, the numeral 152 denotes the body of the IC module. Numeral 153 
denotes a first outer lead provided plurally on one of two opposed side 
faces of the IC module body 152. The first outer leads 153 are drawn out 
to the exterior from the one side face of the body 152 and their front 
ends are bent upward. Numeral 154 denotes a second outer lead provided 
plurally on the other side face of the IC module body 152. The second 
outer leads 154 are drawn out to the exterior from the other side face and 
their front ends are bent downward. 
FIG. 19 is a side view showing the construction of a conventional 
semiconductor component disclosed in JP-A No. 2-63150. In FIG. 19 there is 
shown a semiconductor component assembled by mounting three such IC 
modules as shown in FIG. 18 onto a mounting substrate. In the same figure, 
the numeral 161 represents the semiconductor component. 
Numeral 162 denotes a mounting substrate, and numeral 163 denotes an 
electric connection connected to the first and second outer leads 153, 
154. The other constituent elements are the same as those indicated by the 
same reference numerals in FIG. 18, so detailed explanations thereof are 
here omitted. 
According to the construction of the conventional semiconductor component 
161 shown in FIG. 19, the IC modules 151 are mounted on the mounting 
substrate 162 in such a manner that the first outer leads 153 of one of 
two adjacent IC modules and the second outer leads 154 of the other IC 
module are engaged and connected with each other on the electric 
connection 163 formed on the upper surface of the mounting substrate 162, 
and the engaged and connected portion of both leads 153 and 154 is 
connected to the electric connection 163 using solder for sample. 
Since the conventional IC module disclosed in JP-A No. 2-63150 is 
constructed as above, it is not necessary to ensure the space for the 
connecting wires on the surface of the mounting substrate. Therefore, the 
foregoing problem ascribable to the connecting wire area does not occur. 
However, in the case where two such conventional IC modules as shown in 
JP-A No. 2-63150 are mounted onto a mounting substrate to constitute a 
semiconductor component, the portion ("outer lead connection" hereinafter) 
where the first outer leads of one IC module and the second outer leads of 
the other IC module are engaged and connected with each other is connected 
to an electric connection formed on the upper surface of the mounting 
substrate, using solder for example. Therefore, in the case of mounting 
the two IC modules onto the substrate to constitute a semiconductor 
component, there is a fear that solder or the like may flow on the upper 
surface of the substrate and that consequently adjacent outer lead 
connections may be connected together. There has been the same fear also 
in the case of correcting a poor connection between the first outer leads 
of one IC module and the second outer leads of the other IC module. 
Since the conventional semiconductor component disclosed in JP-A No. 
2-63150 is constructed as above, it is not necessary to form connecting 
wires on the upper surface of the mounting substrate and hence there does 
not arise the foregoing problem based on connecting wires. According to 
the conventional semiconductor component in question, however, the portion 
(outer lead connection) where the first outer leads of one of two adjacent 
IC modules and the second outer leads of the other IC module is connected 
to an electric connection provided on the upper surface of the mounting 
substrate by the use of solder or the like. Consequently, there is a fear 
that adjacent outer lead connections may be connected together. There has 
been the same fear also in the case of correcting a poor connection 
between the first outer leads of one of two IC modules and the second 
outer leads of the other IC module. 
The present invention has been accomplished for solving the above-mentioned 
problems and it is an object of the invention to provide a semiconductor 
component capable of contributing to a further reduction in size of home 
electric appliances and information devices. 
It is another object of the present invention to provide a semiconductor 
component high in reliability of the connection between two IC modules and 
capable of easily correcting a poor connection between two IC modules. 
It is a further object of the present invention to provide an IC module 
capable of contributing to a further reduction in size of home electric 
appliances and information devices. 
It is a still further object of the present invention to provide an IC 
module capable of constituting a semiconductor component high in 
reliability of the connection between two IC modules and capable of easily 
correcting a poor connection between two IC modules. 
According to the present invention, in the first aspect thereof, there is 
provided a semiconductor component comprising an IC module and a mounting 
substrate with the IC module mounted thereon, the IC module comprising an 
IC module body with two semiconductor chips sealed therein, interchip 
connecting inner leads disposed between the two semiconductor chips and 
connected electrically to the chips, and outer leads drawn out from two or 
more of our or more side faces of the IC module body up to positions flush 
with the underside of the IC module body. 
The semiconductor component in the first aspect of the present invention 
can contribute to a further reduction in size of home electric appliances 
and information devices. 
In the second aspect of the present invention there is provided a 
semiconductor component comprising two IC modules and a mounting substrate 
with the IC modules mounted thereon, the IC modules each comprising an IC 
module body with a semiconductor chip sealed therein, first outer leads 
for connection between the IC modules, the first outer leads being drawn 
out horizontally to the exterior of the IC module body from one or more of 
four or more side faces of the IC module body, and second outer leads 
drawn out to the exterior of the IC module body up to positions flush with 
the underside of the IC module body from two or more of the other side 
faces than the side faces from which the first outer leads are drawn out, 
the first outer leads of the IC modules being connected with each other in 
the air. 
The semiconductor component in the second aspect of the invention can 
contribute to a further reduction in size of home electric appliances and 
information devices. Further, the reliability of connection between the 
two IC modules is high and it is easy to correct a poor connection between 
the two IC modules. 
In the third aspect of the present invention there is provided an IC module 
comprising an IC module body with two semiconductor chips sealed therein, 
interchip connecting inner leads disposed between the two semiconductor 
chips and connected electrically to the chips, and outer leads drawn out 
from two or more of four or more side faces of the IC module body up to 
positions flush with the underside of the IC module body. 
The IC module in the third aspect of the invention can contribute to a 
further reduction in size of home electric appliances and information 
devices. 
In the fourth aspect of the present invention there is provided an IC 
module comprising an IC module body with semiconductor chips sealed 
therein, first outer leads for intermodule connection drawn out 
horizontally to the exterior of the IC module body from one or more of 
four or more side faces of the IC module body, and second outer leads 
drawn out to the exterior of the IC module body up to positions flush with 
the IC module body from two or more of the other side faces than the side 
faces from which the first outer leads are drawn out. 
The IC module in the fourth aspect of the invention can contribute to a 
further reduction in size of home electric appliances and information 
devices. Moreover, the reliability of connection between two such IC 
modules is high and it is easy to correct a poor connection between the 
two IC modules.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
Embodiments of the present invention will be described hereinunder. 
First Embodiment 
FIGS. 1A and 1B are a construction diagram showing an IC module according 
to the first embodiment of the present invention. The IC module 
illustrated in FIGS. 1A and 1B are a combined module obtained by packaging 
a CPU chip and a memory chip. FIG. 1A is a perspective view and FIG. 1B is 
a sectional view taken on line I--I in FIG. 1A. In FIGS. 1A and 1B, the 
reference numeral 1 denotes a combined module (IC module), numeral 5 
denotes a CPU chip (semiconductor chip), and numeral 8 denotes a memory 
chip (semiconductor chip). The CPU chip 5 plays the role of controlling a 
small-sized device, while the memory chip 8 plays the role of storing data 
necessary for the CPU chip 5 to control the small-sized device. 
Numeral 2 denotes a combined module body (IC module body). Numeral 3 
denotes an inner lead for connection between the chips, the inner lead 3 
being disposed between the CPU chip 5 and the memory chip 8 and sealed in 
the combined module body 2. Numeral 4 denotes an outer lead, the outer 
lead 4 being provided on the combined module body 2 and drawn out to the 
exterior from four side faces of the combined module body 2 up to 
positions flush with the underside of the body 2. Numerals 6 and 7 denote 
substrates for the chips 8 and 5, respectively. Numeral 9 denotes a 
bonding wire for connecting together the CPU chip 5 and the inner leads 3 
both sealed in the combined module body 2. Numeral 10 denotes a bonding 
wire for connection between the CPU chip 5 sealed in the combined module 
body 2 and the outer leads 4. Numeral 11 denotes a bonding wire for 
connection between the memory chip 8 sealed in the combined module body 2 
and the inner leads 3. Numeral 12 denotes a bonding wire for connection 
between the memory chip 8 sealed in the combined module body 2 and the 
outer leads 4. The inner leads 3 are provided for permitting the CPU chip 
5 to receive data from the memory chip 8 and transmit a control signal to 
the memory chip 8 to control the operation of the memory chip 8 and for 
permitting the memory chip 8 to receive the control signal from the CPU 
chip 5 and transmit data to the CPU chip. The outer leads 4 are provided 
for permitting the CPU chip 5 to be supplied with electric power and 
receive and transmit an information signal from and to the exterior of the 
small-sized device and for permitting the memory chip 8 to be supplied 
with electric power and receive and transmit an information signal from 
and to the exterior of the small-sized device. 
FIG. 2 is a perspective view showing the construction of a semiconductor 
component according to the first embodiment of the present invention, 
which is constituted by mounting the combined module shown in FIGS. 1A and 
1B onto a mounting substrate. The numeral 13 in FIG. 2 denotes the 
semiconductor component. 
Numeral 14 denotes a mounting substrate. The other constituent elements are 
the same as those indicated by the same reference numerals as in FIGS. 1A 
and 1B, so detailed explanations thereof are here omitted. 
The semiconductor component 13 is assembled by mounting the combined module 
1 onto the mounting substrate 14. 
The operation of the semiconductor component 13 will be described below. 
Main operations are as follows. The CPU chip 5 transmits a control signal 
to the memory chip 8 through the inner leads 3 to control the operation of 
the memory chip 8. The memory chip 6 receives the control signal through 
the inner leads 3. In accordance with this control signal the memory chip 
8 operates and transmits data to the CPU chip 5 through the inner leads 3, 
which data is necessary for the CPU chip 5 to control the small-sized 
device. The CPU chip 5 receives the data through the inner leads 3. In 
accordance with the data the CPU chip 5 controls the small-sized device 
and transmits an information signal to the exterior of the small-sized 
device through the outer leads 4. 
Thus, the IC module according to the first embodiment comprises an IC 
module body with two semiconductor chips sealed therein and the inner 
leads disposed between the two semiconductor chips and connected 
electrically to the chips. Therefore, unlike the prior art, it is not 
necessary to ensure a space for connecting wires on the supper surface of 
the mounting substrate, and there can be obtained an effect contributing 
to the reduction in size of home electric appliances and information 
devices. 
Besides, since the IC module is of a construction wherein two semiconductor 
chips are connected together using inner leads disposed between the 
semiconductor chips, there is obtained an affect that the reliability of 
connection between the two semiconductor chips is high. 
Moreover, according to the construction of the IC module, outer leads are 
drawn out to the exterior from four side faces of the IC module up to 
positions flush with the underside of the IC module body. Thus, there is 
obtained an effect that the stability of the IC module as mounted on the 
mounting substrate is high. Such an effect is attained if outer leads are 
drawn out to the exterior from at least two side faces of the IC module 
body up to positions flush with the underside of the IC module body. 
The semiconductor component according to the first embodiment is 
constituted by mounting an IC module onto a mounting substrate, the IC 
module comprising an IC module body with two semiconductor chips sealed 
therein and inner leads disposed between the two semiconductor chips and 
connected electrically to the chips. Therefore, unlike the prior art, it 
is not necessary to form bonding wires on the upper surface of the 
mounting substrate, and such a semiconductor component can contribute to 
the reduction in size of home electric appliances and information devices. 
Further, since the semiconductor component is of a construction wherein an 
IC module comprising two semiconductor chips connected together using 
inner leads disposed between the chips is mounted on a mounting substrate, 
there can be attained a high reliability of connection between the two 
semiconductor chips. 
Further, according to the construction of the semiconductor component, an 
IC module having outer leads drawn out to the exterior from four side 
faces of the IC module body up to positions flush with the underside of 
the IC module body is mounted on a mounting substrate. Thus, there can be 
attained a high stability of the IC module on the substrate. Such an 
affect is obtained if the IC module mounted on the substrate is of a 
construction wherein outer leads are drawn out to the exterior from at 
least two side faces of the IC module body up to positions flush with the 
underside of the IC module body. 
If the combined module according to the first embodiment is divided into 
the CPU chip and the memory chip, it can be used as both a microcomputer 
module and a memory module. FIG. 3 shows a state divided along the 
position indicated with a dotted line in FIGS. 1A and 1B. In this case, it 
is necessary that outer leads for connection between the microcomputer 
module and the memory module be provided beforehand on side faces of the 
combined module so as to permit connection between both modules after the 
division through wires provided on the upper surface of the mounting 
substrate. 
Second Embodiment 
FIG. 4 is a perspective view showing the construction of IC modules 
according to the second embodiment of the present invention, in which are 
illustrated a microcomputer module (IC module) 21 and a memory module (IC 
module) 31. The microcomputer 21 plays the role of controlling a 
small-sized device, while the memory module 31 plays the role of storing 
data necessary for the microcomputer module 21 to control the small-sized 
device. 
In FIG. 4, the numeral 22 denotes a microcomputer module body (IC module 
body), numeral 23 denotes a first outer lead for connection between both 
modules, the first outer lead 23 being drawn out horizontally to the 
exterior from one side face of the microcomputer module body 22, and 
numeral 24 denotes a second outer lead drawn out to the exterior from 
three side faces of the microcomputer module body 22 up to positions flush 
with the underside of the body 22. The first outer leads 23 are for 
permitting the microcomputer module 21 to receive data from the memory 
module 31 and transmit a control signal to the memory module 31 to control 
the operation of the memory module. The second outer leads 2, are for 
permitting the microcomputer module 21 to be supplied with electric power 
and receive and transmit an information signal from and to the exterior of 
the small-sized device. 
The numeral 32 denotes a memory module body (IC module body), numeral 33 
denotes a first outer lead for connection between both modules, the first 
outer lead 33 being provided on the memory module body 32 and drawn out 
horizontally to the exterior from one side face of the memory module body 
32, and numeral 3, denotes a second outer lead provided on the memory 
module body 32 and drawn out to the exterior from three side faces of the 
memory module body 32 up to positions flush with the underside of the 
memory module body 32. The first outer leads 33 are for permitting the 
memory module 31 to receive a control signal from the microcomputer module 
21 and transmit data to the microcomputer module 21. The second outer 
leads 34 are for permitting the memory module 31 to be supplied with 
electric power and receive an information signal from the exterior of the 
small-sized device. 
The CPU chip sealed in the microcomputer module body 22 and the first and 
second outer leads 23, 24 are electrically connected with each other. 
Likewise, the memory chip sealed in the memory module body 32 and the 
first and second outer leads 33, 34 are electrically connected with each 
other. 
FIG. 5 is a perspective view showing the construction of a semiconductor 
component according to the second embodiment of the present invention, 
which component is constituted by mounting the microcomputer module and 
the memory module both shown in FIG. 4 onto a mounting substrate. In FIG. 
5, the numeral 41 represents the semiconductor component and numeral 42 
represents the mounting substrate. The other constituent elements are the 
same as those indicated by the same reference numerals in FIG. 4, so 
detailed explanations thereof are here omitted. 
The semiconductor component 41 is assembled by mounting the microcomputer 
module 21 and the memory module 31 onto the substrate 42 so that the first 
outer leads 23 of the microcomputer module 21 and the first outer leads 33 
of the memory module 31 opposed thereto are connected together in an 
overlapped manner. Alternatively, the microcomputer module 21 and the 
memory module 31 are mounted on the substrate 42 so that the respective 
first outer leads 23 and 33 are connected together in an overlapped 
manner, then the overlapped portions of both outer leads are bonded 
together using solder or the like. 
The operation of the semiconductor component according to the second 
embodiment will be described below. 
Main operations are as follows. The microcomputer module 21 transmits a 
control signal to the memory module 31 through the outer leads 23 to 
control the operation of the memory module 31. The memory module 31 
receives the control signal through the outer leads 33. In accordance with 
this control signal the memory module 31 operates and transmits data to 
the microcomputer module 21 through the first outer leads 33, which data 
is necessary for the microcomputer module 21 to control the small-sized 
device. The microcomputer module 21 receives the data through the first 
outer leads 23. In accordance with the data thus received the 
microcomputer module 21 controls the small-sized device and transmits a 
control signal to the exterior of the small-sized device through the 
second outer leads 24. 
Thus, the IC modules according to the second embodiment each comprise an IC 
module body with a semiconductor chip sealed therein and first outer leads 
drawn out horizontally to the exterior of the IC module body from one side 
face of the same body. Therefore, unlike the prior art, it is not 
necessary to ensure the space for connecting wires on the upper surface of 
the mounting substrate. Thus, the IC modules in question can contribute to 
the reduction in size of home electric appliances and information devices. 
Further, in assembling the semiconductor component of the embodiment, 
there is no fear that adjacent first outer lead connections may be 
connected together. In correcting a poor connection between both IC 
modules, therefore, there is attained a high reliability of connection 
between the IC modules. Thus, the semiconductor component in question 
permits easy correction of a poor connection between the two IC modules. 
Moreover, since the IC modules according to the second embodiment are each 
of a construction such that the second outer leads are drawn out to the 
exterior from three side faces of the IC module body up to positions flush 
with the underside of the IC module body, there is attained a high 
stability of the IC module when mounted on the substrate. Such an effect 
is obtained if the outer leads are drawn out to the exterior from at least 
tow side faces of the IC module body up to positions flush with the 
underside of the IC module body. 
According to the construction of the semiconductor component of the second 
embodiment, two IC modules each comprising an IC module body with a 
semiconductor chip sealed therein and first outer leads drawn out 
horizontally to the exterior of the IC module body from one side face of 
the IC module body are mounted on a mounting substrate, then the first 
outer leads of one IC module and the first outer leads o the other IC 
module opposed thereto are overlapped and connected with each other in the 
air. Therefore, unlike the prior art, it is not necessary to provide 
connecting wires on the mounting substrate, that is, the semiconductor 
component in question can contribute to the reduction in size of home 
electric appliances and information devices. Further, there is no fear 
that adjacent first outer lead connections may be connected together, so 
in the case of correcting a poor connection between the IC modules, there 
can be attained a highly reliable connection between the two IC modules 
and it is easy to correct a poor connection between the two IC modules. 
According to the construction of the semiconductor component in question, 
moreover, two IC modules are mounted on a substrate and each having second 
outer leads drawn out to the exterior from three side faces of the IC 
module body up to positions flush with the underside of the IC module 
body. This construction brings about the effect that the semiconductor 
component is highly stable when mounted on the substrate. Such an affect 
is obtained if only on a substrate are mounted two IC modules each of a 
construction such that outer leads are drawn out to the exterior from at 
least two side faces of the IC module body up to positions flush with the 
underside of the IC module body. 
Third Embodiment 
FIG. 6 is a perspective view showing the construction of IC modules 
according to the third embodiment of the present invention. FIG. 7 is a 
perspective view showing the construction of a semiconductor component 
according to the third embodiment of the present invention, which 
component has been assembled by mounting both microcomputer module and 
memory module shown in FIG. 6 onto a mounting substrate. In FIGS. 6 and 7, 
the numeral 23a denotes a first outer lead for connection between both 
modules, the first outer lead 23a being provided on a microcomputer module 
body 22 and drawn out horizontally to the exterior from one side face of 
the microcomputer module body, the first outer lead 23a having a concave 
front end. Numeral 33a denotes a first outer lead for connection between 
both modules, the first outer lead 33a being provided on a memory module 
body 32 and drawn out horizontally to the exterior from one side face of 
the memory module body, the first outer lead 33a having a convex front 
end. The other constituent elements are the same as or equal to those 
indicated by the same reference numerals in FIG. 4 or 5, so detailed 
explanations thereof are here omitted. 
A semiconductor component 41 according to the third embodiment of the 
present invention is shown in FIG. 7. The semiconductor component 41 is 
assembled by mounting the microcomputer module 21 and the memory module 31 
both shown in FIG. 6 onto a mounting substrate 42 in such a manner that 
the convex front end portions of the first outer leads 33a of the memory 
module 31 are fitted in and connected to the concave front end portions of 
the first outer leads 23a of the microcomputer module 21 opposed thereto. 
Alternatively, after the microcomputer module 21 and the memory module 31 
have been mounted on the substrate in the above manner, the front end 
portions of the first outer leads 33a and 23a connected together by 
fitting are bonded using solder or the like. 
Thus, according to the construction of the semiconductor component of the 
third embodiment, both IC module provided with first outer leads having 
convex front ends and IC module provided with first outer leads having 
concave front ends are mounted on a substrate, then the convex front end 
portions of the first outer leads of one IC module are fitted in the 
concave front end portions of the first outer leads of the other IC module 
opposed thereto, thus the outer leads of both IC modules are connected 
together in the air. 
According to this third embodiment there are obtained the same effects as 
in the second embodiment. 
Fourth Embodiment 
FIG. 8 is a perspective view showing the construction of a microcomputer 
module and a memory module as IC modules according to the fourth 
embodiment of the present invention, and FIG. 9 is a perspective view 
showing the construction of a semiconductor component according to the 
fourth embodiment of the present invention, which has been assembled by 
mounting the microcomputer module and the memory module both shown in FIG. 
8. In FIGS. 8 and 9, the numeral 23b denotes a first outer lead for 
connection between both modules, the first outer lead 23b being provided 
on a microcomputer module body 22 and drawn out horizontally to the 
exterior from one side face of the microcomputer module body, the first 
outer lead 23b having a convex or concave front end. Numeral 33b denotes a 
first outer lead provided on a memory module body 32 and drawn out 
horizontally to the exterior from one side face of the memory module body, 
the first outer lead 33b having convex or concave front end. The other 
constituent elements are the same as or equal to those indicated by the 
same reference numerals in FIG. 4 or 5, so detailed explanations thereof 
are here omitted. 
A semiconductor component 41 according to the fourth embodiment of the 
present invention is assembled by mounting the microcomputer module 21 and 
the memory module 31 both shown in FIG. 8 onto a mounting substrate 42 in 
such a manner that the convex front end portions of the first outer leads 
33b of the memory module 31 are fitted in and connected to the concave 
front end portions of the first outer leads 23b of the microcomputer 
module 21 opposed thereto, while the convex front end portions of the 
first outer leads 23b of the microcomputer module 21 are fitted in and 
connected to the concave front end portions of the first outer leads 33b 
of the memory module 31. Alternatively, after the microcomputer module 21 
and the memory module 31 have been mounted on the substrate 42 in the 
above manner, the fitted and connected portions between the convex and 
concave front end portions of the first outer leads 33b and 23b, 
respectively, of the memory module 31 and the microcomputer module 21, as 
well as the fitted and connected portions between the convex and concave 
front end portions of the first outer leads 23b and 33b, respectively, of 
the microcomputer module 21 and the memory module 31, are bonded together 
using solder or the like. 
Thus, according to the construction of the semiconductor component of the 
fourth embodiment, two IC modules each provided with first outer leads 
having convex front ends and first outer leads having concave front ends, 
both first outer leads being arranged in an alternate manner, are mounted 
on a substrate, then the convex front end portions of the first outer 
leads of one IC module are fitted in the concave front end portions of the 
first outer leads of the other IC module, while the convex front end 
portions of the first outer leads of the other IC module are fitted in the 
concave front end portions of the one IC module, thus the first outer 
leads of both IC modules are connected together in the air. 
According to this fourth embodiment there are obtained the same effects as 
in the second embodiment. 
Fifth Embodiment 
FIG. 10 is a perspective view showing the construction of IC modules 
according to the fifth embodiment of the present invention, the IC modules 
being a microcomputer module and a memory module. FIG. 11 is a perspective 
view showing the construction of a semiconductor component according to 
the fifth embodiment of the present invention. The semiconductor component 
has been assembled by mounting the microcomputer module and the memory 
module both shown in FIG. 10 onto a mounting substrate. In FIGS. 10 and 
11, the numeral 23c denotes a first outer lead for connection between both 
modules, the first outer lead 23c being provided on a microcomputer module 
body 22 and drawn out horizontally to the exterior from one side face of 
the microcomputer module body, the first outer lead 23c having a stepwise 
raised front end portion. Numeral 33c denotes a first outer lead for 
connection between both modules, the first outer lead 33c being provided 
on a memory module bode 32 and drawn out to the exterior horizontally from 
one side face of the memory module body. The other constituent elements 
are the same as or equal to those indicated by the same reference numerals 
in FIG. 4 or FIG. 5, so detailed explanations thereof are here omitted. 
According to the construction of the semiconductor component 41 of the 
fifth embodiment illustrated in FIG. 11, the microcomputer module 21 and 
the memory module 31 are mounted on the substrate 42 in such a manner that 
the front ends of the first outer leads 33c of the memory module 31 get 
into the space under the stepwise raised front end portions of the first 
outer leads 23c of the microcomputer module 21 opposed thereto and are 
connected to such front ends of the first outer leads 23c. Alternatively, 
after both modules have been mounted on the substrate in the above manner, 
the connected portions of both front end portions are bonded together 
using solder for example. 
Thus, the semiconductor component according to the fifth embodiment is 
constructed as follows. An IC module provided with first outer leads 
having front ends as drawn out horizontally and an IC module provided with 
first outer leads having stepwise raised front end portions are mounted on 
a substrate, then the front ends of the first outer leads of one IC module 
are brought into the space under the stepwise raised front and portions of 
the first outer leads of the other IC module, and the first outer leads of 
both IC modules are connected together in the air. 
According to this fifth embodiment there are obtained the same effects as 
in the second embodiment. 
Sixth Embodiment 
FIG. 12 is a perspective view showing the construction of IC modules 
according to the sixth embodiment of the present invention, the IC modules 
being a microcomputer module 21 and a memory module 31. FIG. 13 is a 
perspective view showing the construction of a semiconductor component 
according to this sixth embodiment of the invention, which has been 
assembled by mounting the microcomputer module and the memory module 31 
both shown in FIG. 12 onto a mounting substrate. In FIGS. 12 and 13, the 
numeral 23d denotes a first outer lead for connection between both 
modules, the first outer lead 23d being provided on a microcomputer module 
body 22 and drawn out to the exterior from one side face of the body 22, 
the first outer lead 23d having a stepwise lowered front end portion. 
Numeral 33d denotes a first outer lead for connection between both 
modules, the first outer lead 33d being provided on a memory module body 
32 and drawn out to horizontally to the exterior from one side face of the 
memory module body 32. The other constituent elements are the same as or 
equal to those indicated by the same reference numerals in FIG. 4 or 5, so 
detailed explanations thereof are here omitted. 
The semiconductor component 41 according to the sixth embodiment of the 
present invention is assembled by mounting the microcomputer module 21 and 
the memory module 31 on the substrate 42 in such a manner that the front 
ends of the first outer leads 33d of the memory module 21 get into the 
space above the stepwise lowered from end portions of the first outer 
leads 23d of the microcomputer module 21 opposed thereto and are connected 
thereto. Alternatively, after both modules have been mounted on the 
substrate 42 in the above manner, the front end portions of both first 
outer leads thus connected together are bonded using solder for example. 
Thus, the semiconductor component according to this sixth embodiment is 
assembled by mounting on a mounting substrate an IC module provided with 
first outer leads having front ends as drawn out horizontally and an IC 
module provided with first outer leads having stepwise lowered front end 
portions, then bringing the front ends of the first outer leads of one IC 
module into the space above the stepwise lowered front end portions of the 
first outer leads of the other IC module, and connecting together the 
first outer leads of both IC modules in the air. 
According to this sixth embodiment there are obtained the same effects as 
in the second embodiment. 
Seventh Embodiment 
FIG. 14 is a perspective view showing the construction of IC modules 
according to the seventh embodiment of the present invention, the IC 
modules being a microcomputer module 21 and a memory module 31. FIG. 15 is 
a perspective view showing the construction of a semiconductor component 
according to the seventh embodiment, which is assembled by mounting the 
microcomputer module and the memory module both shown in FIG. 14 onto a 
mounting substrate. In FIGS. 14 and 15, the numeral 23e denotes a first 
outer lead for connection between both modules, the first outer lead 23e 
being provided on a microcomputer module body 22 and drawn out to the 
exterior horizontally from one side face of the body 22, the first outer 
lead 23e having a stepwise raised or lowered front end portion. Numeral 
33e denotes a first outer lead for connection between both modules, the 
first outer lead 33e being provided on a memory module body 32 and drawn 
out to the exterior horizontally from one side face of the body 32. The 
other constituent elements are the same as or equal to those indicated by 
the same reference numerals in FIG. 4 or 5, so detailed explanations 
thereof are here omitted. 
The semiconductor component 41 according to this seventh embodiment 
illustrated in FIG. 15 is assembled by mounting the microcomputer module 
21 and the memory module 31 on the substrate 42 in such a manner that the 
front ends of the first outer leads 33e of the memory module 31 get into 
the space under the stepwise raised front end portions or the space above 
the stepwise lowered front end portions of the first outer leads 23e of 
the microcomputer module 21 opposed thereto. Alternatively, after the 
microcomputer module 21 and the memory module 31 have been mounted on the 
substrate 42 in the above manner, the connections of the front ends of the 
first outer leads 33e with the stepwise raised front ends of the first 
outer leads 23e and the connections thereof with the stepwise lowered 
front ends of the first outer leads 23e are bonded using solder for 
example. 
Thus, the semiconductor component according to the seventh embodiment is 
assembled by mounting on a substrate an IC module provided with first 
outer leads having front ends as drawn out horizontally and an IC module 
provided with first outer leads having stepwise raised front ends and 
first outer leads having stepwise lowered front ends in an alternate 
manner, than causing the front ends of the first outer leads of one IC 
module to get into the space under the stepwise raised front ends or the 
space above the stepwise lowered front ends of the first outer leads of 
the other IC module opposed thereto, and connecting together the first 
outer leads of both IC modules in the air. 
According to this seventh embodiment there are obtained the same effects as 
in the second embodiment. 
Although the foregoing first embodiment referred to both CPU chip and 
memory chip as semiconductor chips, and the second to seventh embodiments 
referred to both IC module and microcomputer module as IC modules, no 
limitation is placed on the type of semiconductor chips and that of IC 
modules. 
Further, although in the second to seventh embodiments the first outer 
leads are drawn out from one side face of the IC module body, they may be 
drawn out from two or more side faces if the second outer leads are drawn 
out from at least two side faces.