JP3091159B2 - Conversion module - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conversion module used when a semiconductor package such as a PGA (pin grid array) is signal-converted and mounted on a motherboard.

[0002]

2. Description of the Related Art A semiconductor package having a function as a CPU (central processing unit) is mounted on a motherboard in a personal computer. At present, such a semiconductor package has a large number of I / Os on one side.
The PGA (pin grid array) type in which / O pins are erected is most popular. In addition, this type of PGA is mounted by, for example, inserting each I / O pin into a through hole on the motherboard side and then soldering.

[0003] In some cases, a user of a personal computer desires to upgrade the personal computer for the purpose of speeding up processing. In this case, it is necessary to remove the existing CPU from the motherboard and mount a new high-performance CPU. As a result of considering the convenience in such a case, in recent years, it has become common to mount the PGA 51 on the motherboard 53 indirectly via the fixed socket 52 instead of directly mounting the PGA 51 (see FIG. 11). . The figure shows the state before the upgrade.

[0004] On the back surface of the fixed socket 52 shown in FIG. 11, a female socket pin 54 to be soldered to a through hole on the motherboard 53 side is provided upright. On the upper part of the female socket pin 54, the I /
An insertion hole into which the O pin 55 is inserted is provided. As a result of inserting the I / O pins 55 into the holes, the electrical connection between the motherboard 53 and the PGA 51 is established, and the PGA 51 is in an operable state.

FIGS. 12 and 13 show a state after the upgrade. In FIG.
And a PGA 61, a conversion module 57 is interposed. The conversion module 57 includes one conversion board 58
And one socket board 56. Socket board 5
6, a large number of female socket pins 60 are molded. Each female socket-shaped pin 60 protrudes from the back side of the socket board 56. The insertion holes of these female socket pins 60 are provided with I / O
The O pin 62 can be inserted and removed. The conversion board 58 is a multi-layer board (four-layer board), and is laminated by interposing one insulating base material (for example, prepreg) 69 between two double-sided boards 68. This multilayer board has via holes 66 on both front and back surfaces. The protruding end of the female socket-shaped pin 60 of the socket substrate 56 is fitted into the via hole 66 on the front surface side and soldered. A male pin 59 is inserted and soldered into the via hole 66 on the back side. Each male pin 59 can be inserted into and removed from the insertion hole of the female socket pin 54 of the fixed socket 52.
In an area where the socket board 56 does not exist in the conversion board 58, an IC 64 storing a signal conversion program is stored.
Also, a resistor 65 for converting a voltage and the like are mounted. The conductor layers on both sides of the conversion board 58 are electrically connected to each other through a mini via hole 67 having a smaller diameter than the via hole 66 for pin insertion.

[0006] Therefore, by using the conversion module 57 having the above configuration, the PGA 61 can be adapted to the motherboard 53, and the original performance of the PGA 61 is sufficiently exhibited.

[0007]

However, in the conversion module 57 shown in FIGS. 12 and 13, since a multilayer board having a complicated structure is used as the conversion board 58, manufacturing is troublesome and leads to an increase in cost. There was a problem that it was easy.

When the size of the conversion module 57 becomes large as a whole, it becomes difficult to accommodate the personal computer in a housing. Therefore, it has been considered that the conversion board 58 constituting the conversion module 57 should be formed as compact as possible.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a compact, low-cost conversion module having a simple configuration.

[0010]

In order to solve the above-mentioned problems, according to the present invention, there is provided a converter interposed between a semiconductor package having I / O pins and a motherboard on which the semiconductor package is mounted. A module, a socket substrate having male and female pins protruding on both front and back surfaces of the base material, a first pad formed on the front surface side of the double-sided plate and a second pad formed on the back surface side, The first pad has the I
A first female socket pin into which a / O pin can be inserted and withdrawn is soldered, and a second female socket pin for fitting the male pin into the second pad is soldered; A gist of the present invention is a conversion module including a conversion substrate formed with a mini-via hole for conducting between conductive layers on both sides of a double-sided board.

According to a second aspect of the present invention, there is provided a conversion module interposed between a semiconductor package having I / O pins and a mother board on which the semiconductor package is mounted, wherein the first pad is provided on the front side of the double-sided board. Is formed and a second pad is formed on the back surface side, and the I / O is formed on the first pad.
A female-type socket pin into which an O-pin can be inserted and removed is soldered, a male pin is soldered to the second pad, and a mini-via hole is formed to conduct the conductive layers on the front and back of the double-sided board. The gist is a conversion module including a conversion board.

According to a third aspect of the present invention, in the first or second aspect, the first and second pads are formed in a positional relationship at least overlapping when the double-sided board is projected in a thickness direction. It is assumed that the mini via hole is formed in a region where both pads overlap.

The "action" of the present invention will be described below. According to the first and second aspects of the present invention, the signal passing between the semiconductor package and the motherboard is converted by the conversion board, so that the original function of the semiconductor package is sufficiently exhibited and the processing speed is increased. You.

Further, since the conversion board is formed of a double-sided board, the structure is reliably simplified as compared with the case of a multi-layer board. In addition, it is not necessary to form a via hole for inserting a pin, and it is sufficient to form only a mini via hole for front and back conduction, so that the configuration is also simplified. Therefore, from the above two points, the production of the conversion module is facilitated and the cost is reduced.

Furthermore, the external dimensions of the conversion board can be reduced by eliminating the need for forming via holes for pin insertion. For this reason, the conversion module can be made compact.

According to the second aspect of the present invention, the following operation is obtained in addition to the above operation. That is, since the conversion module is reduced in height by omitting the socket substrate, it is possible to further reduce the size. Further, since the overall configuration is simplified, further cost reduction is achieved.

According to the third aspect of the present invention, conduction between the front and back surfaces of the double-sided board can be achieved without drawing out the wiring pattern from the first and second pads in the layer direction, so that the pitch of the pads can be reduced. The external dimensions of the conversion board can be reduced. Therefore, the conversion module can be made more compact. Further, since there is no obstacle in the space between the pads, pattern routing becomes easy, which is convenient for circuit design.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION

[First Embodiment] Hereinafter, a conversion module 1 according to an embodiment of the present invention will be described in detail with reference to FIGS.

As shown in FIGS. 1 to 3, the conversion module 1 of this embodiment includes a conversion board 2 and a socket board 3.
Consists of This conversion module 1 is for mounting a PGA 21 as a semiconductor package on a motherboard MB after signal conversion.

Double-sided board 1 constituting a main part of conversion board 2
4 is located below the socket board 3. The double-sided board 14 is rectangular and rigid, and has two conductor layers on both sides. As shown in FIGS. 4 and 5, a first pad 4, a second pad 5, wiring patterns 6, 7 and a mini via hole are provided in a first region of the double-sided board 14 which is hidden under the lower surface of the socket substrate 3. 8 are formed.
On the other hand, in the second area of the double-sided board 14 extending in the lateral direction,
Pads 9 and 10 for connecting electronic parts having a rectangular shape are formed respectively. The pad 9 is for mounting a DIP (dual in-line package) 11 on the surface. The pad 10 is for mounting the chip resistor 12 on the surface. The pad 10 is also formed on the lower surface side of the double-sided board 14. Both the chip resistor 12 and the DIP 11 are connected to the corresponding pads 9 and 10 via solder S1.

As shown in FIG. 5, the wiring patterns 6 and 7 on the surface layer of the double-sided board 14 electrically connect the first and second pads 4 and 5 and the lands of the mini via hole 8. ing. The wiring pattern 7 serving as a ground pattern is formed to be considerably thicker than the wiring pattern 6. The wiring pattern 7 connects a plurality of pads 4 and 5 in the same plane and lands of a plurality of mini via holes 8. In addition, some of the wiring patterns (not shown) electrically connect between the pads 4 and 5 and the electronic components 11 and 12 or between the electronic components 11 and 12.

As shown in FIG. 3, the first pad 4 is formed on the front side of the double-sided board 14, and the second pad 5 is formed on the back side of the double-sided board 14. As shown in FIG. 5, the pads 4 and 5 have a circular shape and are arranged in a staggered manner. The pads 4 and 5 are formed so as to overlap when the double-sided board 14 is projected in the thickness direction. The surface of the double-sided board 14 is provided with a solder resist 17 having an opening 17a at a predetermined position. The pads 4 and 5 are exposed from the opening 17a except for the outer periphery. That is, the diameter of both pads 4 and 5 (1.
1 mm) is the diameter of the opening 17a (1.0 m in the present embodiment).
m). This is because the pads 4 and 5 are less likely to peel off. The pads 9 and 10 for connecting the electronic components are also exposed from the opening 17a. The lands of the wiring patterns 6, 7 and the mini via hole 8 are not exposed from the solder resist 17,
It is protected by the solder resist 17.

As shown in FIG.
A large number of first female socket pins 15 are surface-mounted on the front side, and the second female socket pins 1 are mounted on the rear side.
6 are surface-mounted. The number of female socket pins 15, 16 is about 200 to 500 in the present embodiment. Both female socket pins 15 and 16 are substantially cylindrical members, and the insertion hole 15
a, 16a are formed. An I / O pin 24 protruding from the lower surface of the PGA 21 is removably inserted into the insertion hole 15a of the first female socket pin 15. The upper end 2 of the male pin 22 projecting from the upper surface of the socket board 3 is inserted into the insertion hole 16a of the second female socket pin 16.
2a is removably inserted. Female socket pin 1
The tapered portions 15b, 1 are provided at the tips of the I / O pins 24 or the male pins 22 so as to facilitate insertion and extraction of the I / O pins 24 or the male pins 22.
6b are formed. The tapered portions 15b and 16b are widened toward the distal end. The proximal end face of the first female socket pin 15 is soldered to the first pad 4, and the proximal end face of the second female socket pin 16 is soldered to the second pad 5. Fillets are formed on the peripheral surfaces of the base end portions of the female socket pins 15 and 16 and the surfaces of the pads 4 and 5 by solder S1. It is preferable that the diameter of the base ends of the female socket pins 15 and 16 be smaller than the diameter of the opening 17 a of the solder resist 17. The reason is to form a suitable fillet at the joint.

As shown in FIG. 3, the mini via hole 8 is formed so as to penetrate both sides of the double-sided board 14. Thus, the conductive layers (wiring patterns 6, 7 and the like) on the front side of the double-sided board 14 and the conductive layers (wiring patterns 6, 7 and the like) on the back side of the double-sided board 14 are electrically connected. Here, the mini-via hole 8 has a diameter smaller than that of a normal via hole (0.4 mm to 0.8 mm in diameter) for the purpose of inserting a pin, and is intended only to conduct conduction between the front and the back. Point to. In the present embodiment, specifically, the diameter 2
A mini via hole 8 of about 00 μm is formed.

As shown in FIGS. 1, 4 and the like, the socket substrate 3 is formed by molding male pins 22. The socket substrate 3 has a square shape, and its outer dimensions are substantially equal to the size of the PGA 21. The upper end 22a of each male pin 22 protrudes from the upper surface of a mold resin portion 23 as a base material. The lower end 22 b of each male pin 22 protrudes from the lower surface of the mold resin part 23. The upper end portion 22a of the male pin 22 is removably fitted into the insertion hole 16a of the second female socket pin 16.

As shown in FIG. 1, the motherboard MB
, A fixed socket 25 is fixed in advance by soldering so as not to be detachable. The fixed socket 25 has a number of female socket pins 26. In use,
The lower end 22b of the male pin 22 of the conversion module 1 is inserted into the insertion hole of the fixed socket 25 so as to be insertable and removable. Note that, for the sake of convenience when performing component replacement, no soldering is performed on the connection portion.

On the other hand, PGA21 which is a semiconductor package
Is mounted on the upper surface side of the double-sided board 14. At this time, PG
The I / O pin 24 of A21 is removably inserted into the insertion hole 15a of the first female socket pin 15. At this time, the PGA 21 side and the motherboard MB side are electrically connected via the conversion module 1. Therefore,
Signals and the like can pass between the PGA 21 and the motherboard MB. At that time, the signals and the like are appropriately converted by the electronic components 11 and 12 of the double-sided board 14 so that
The PGA 21 is in a state where its original function is sufficiently exhibited.

Next, an example of a method for manufacturing the conversion module 1 will be introduced. First, a copper-clad laminate in which copper foil is adhered to both sides of a glass epoxy insulating substrate is used as a starting material, and a copper foil is etched after forming a resist. As a result, pads 4, 5, 9, 10 and wiring patterns 6, 7 are formed on both surfaces of the insulating substrate. Next, Mini Via Hall 8
Is formed using a drill or the like. Furthermore, the via holes 8 are formed by performing electroless copper plating after providing the catalyst nuclei. Thereafter, a solder resist 17 is formed on both surfaces of the insulating substrate. In addition, instead of an insulating substrate made of glass epoxy,
An insulating substrate made of glass polyimide may be selected.

In the subsequent solder printing step, cream solder is double-sided printed on the first pad 4 and the second pad 5 by screen printing. The printing of the cream solder may be performed by a method other than the screen printing. As the cream solder, for example, one obtained by dispersing eutectic solder (Pb: Sn = 37: 63, melting point: 183 ° C.) in a vehicle is used.

Next, the first female socket pin 15
Is arranged so as to be in close contact with the first pad 4, and the proximal end face of the second female socket pin 16 is arranged so as to be in close contact with the second pad 5. In this case, it is preferable that the female socket pins 15 and 16 are supplied while being held by a sheet-shaped and resin-made spacing member. It is of course possible to adopt a method of supplying the female socket pins 15 and 16 in a separated state.

In the subsequent reflow step, after setting the double-sided board 14 in which the female socket pins 15 and 16 are temporarily fixed on both sides in a reflow furnace, the temperature in the furnace is raised to a temperature near the melting point of the cream solder. Let it. As a result of such heating, the female socket pins 15, 16 are joined to the pads 4, 5 by the molten solder S1. That is, according to this method, the first and second female socket pins 15 and 16 are collectively soldered to both surfaces of the double-sided board 14. Thereafter, the desired conversion module 1 is completed by individually soldering the electronic components 11 and 12 to the pads 9 and 10, respectively. Note that cream solder may be printed on the electronic component connecting pads 9 and 10 and soldered at the same time as the female socket pins 15 and 16 used in the reflow process.

The PGA 21 can be operated at high speed by mounting the PGA 21 mounted on the conversion module 1 thus manufactured in the fixed socket 25 of the motherboard MB.

Now, the characteristic effects of this embodiment will be listed below. (A) In the conversion module 1 of the present embodiment, the conversion board 2
Is composed of the double-sided plate 14, so that the configuration is reliably simplified as compared with the conventional one composed of the multilayer plate. Further, it is not necessary to form a normal via hole for pin insertion, and it is sufficient to form only the mini via hole 8 for front and back conduction, so that the configuration is also simplified. Therefore, the production of the conversion module 1 is facilitated from the above two points, and the cost can be reduced.

(B) Further, since it is not necessary to form a via hole for inserting a pin, the outer dimensions of the double-sided board 14 constituting the main part of the conversion board 2 can be reduced. For this reason, the conversion module 1 can be made compact. [Second Embodiment] Next, a conversion module 31 according to a second embodiment will be described with reference to FIGS.

As shown in FIGS. 6 to 8, the conversion module 31 of this embodiment comprises only the conversion board 32, and the socket board 3 is omitted. This conversion module 31 is also a PGA as a semiconductor package.
21 is to be mounted on the motherboard MB after signal conversion.

The double-sided board 14 constituting the main part of the conversion board 32 has the same structure as that used in the first embodiment. Therefore, a detailed description thereof will be omitted, and only common member numbers will be given.

As shown in FIG.
A large number of first female socket pins 15 are surface-mounted on the surface side of. This is the same as the first embodiment. However, in the second embodiment, the double-sided board 1
A large number of male pins 33 are mounted on the rear surface side of the 4 instead of the second female socket pins 16.

As shown in FIG. 8, each male pin 33
Are formed in a nail head shape. The reason why such a shape is adopted is that if the nail head portion 33a is provided on the base end side, the male pin 33 is prevented from coming off, so that the bonding strength is improved and, as a result, high reliability is secured. The nail head 33a is soldered to the second pad 5. As a result, a fillet is formed on the peripheral surface of the male pin 33 and the surface of the pad 5 by the solder S1. Note that the diameter of the nail head 33a is preferably smaller than the diameter of the opening 17a of the solder resist 17. The reason is to obtain a high joining strength by forming a suitable fillet at the joining portion. In the present embodiment, specifically, the nail head unit 3
The diameter of 3a is 0.7 mm and the diameter of opening 17a is 1.0 mm
Is set to The diameter of the male pin 33 other than the nail head 33a is set to 0.45 mm.

As shown in FIG. 8, the mini via hole 8 is formed so as to penetrate the front and back of the double-sided board 14. Thus, the conductive layers (wiring patterns 6, 7 and the like) on the front side of the double-sided board 14 and the conductive layers (wiring patterns 6, 7 and the like) on the back side of the double-sided board 14 are electrically connected. Also in this embodiment, the diameter of the mini via hole 8 is set to 20
It is set to 0 μm.

As shown in FIG. 6, the motherboard MB
, A fixed socket 25 is fixed in advance by soldering so as not to be detachable. The fixed socket 25 has a number of female socket pins 26.

In use, the distal end of the male pin 33 of the conversion module 31 is removably fitted into the insertion hole of the female socket pin 26 of the fixed socket 25. Note that, for the sake of convenience when performing component replacement, no soldering is performed on the connection portion. On the other hand, the PGA 21 is mounted on the front side of the double-sided board 14. At this time, the I / O pin 24 of the PGA 21 is removably inserted into the insertion hole 15a of the first female socket pin 15. At this time, the PGA 21 side and the motherboard MB side are electrically connected via the conversion module 31. Therefore, signals and the like can pass between the PGA 21 and the motherboard MB. At this time, the signals and the like are appropriately converted by the electronic components 11 and 12 of the double-sided board 14, so that the PGA 21 original function is sufficiently exhibited.

Next, an example of a method of manufacturing the conversion module 31 will be described. First, the double-sided board 14 is manufactured in the same procedure as in the embodiment. Next, by performing a pin setting step using a dedicated pin setting jig (not shown), a nail head-shaped male pin 33 in a separated state is formed.
Are aligned at predetermined intervals. At this time, the nail head 33a of each male pin 33 is arranged upward.

Further, the cream solder is printed on one side of the second pad 5 by performing the first solder printing step. Then, the double-sided board 1 on which the single-sided printing is performed
4 is superimposed on the jig, so that the male pin 33
Is brought into close contact with the pin second pad 5. The male mold pin 33 may be supplied while being held by a sheet-shaped and resin-made spacing member.

In the subsequent second solder printing step, the single-sided printing is performed on the double-sided board 14 fixed to the jig, so that the cream solder is attached to the first pad 4. Next, the base face of the first female socket pin 15 is arranged so as to be in close contact with the first pad 4. In this case, the female socket pins 15 may be supplied while being held by the spacing holder, or may be supplied in a discrete state.

In the subsequent reflow step, after setting the double-sided plate 14 together with the jig in the reflow furnace, the temperature in the furnace is raised to a temperature near the melting point of the cream solder. As a result of this heating, the female socket pin 15 is joined to the pad 4 by the molten solder S1, and the male pin 3
3 is joined to the pad 5. That is, according to this method,
The first female socket pin 15 and the male pin 33 are collectively soldered to both surfaces of the double-sided board 14. Thereafter, the desired conversion module 31 is completed through individual soldering of the electronic components 11 and 12.

The PGA 21 mounted on the conversion module 31 thus manufactured is mounted on the fixed socket 25 of the motherboard MB.
Can be operated at high speed.

Now, the characteristic effects of the present embodiment will be enumerated below. (A) In the conversion module 31 of the present embodiment, since the conversion board 32 is formed of the double-sided board 14, the configuration is surely simplified as compared with a conventional module formed of a multilayer board. Further, it is not necessary to form a normal via hole for pin insertion, and it is sufficient to form only the mini via hole 8 for front and back conduction, so that the configuration is also simplified. Therefore, the manufacturing of the conversion module 31 is facilitated from the above two points, and the cost can be reduced.

(B) Further, since it is not necessary to form a via hole for inserting a pin, the outer dimensions of the double-sided board 14 constituting the main part of the conversion board 32 can be reduced. Therefore, the conversion module 31 can be made compact.

(C) In this embodiment, in particular, the conversion module 31 is reduced in height by omitting the socket board 3, so that it is possible to make it even more compact. Further, since the overall configuration is further simplified, further cost reduction can be achieved.

It should be noted that the present invention is not limited to the above-described embodiment, but can be modified to, for example, the following forms. A configuration such as another example of the conversion module 41 shown in FIG. 9 is also possible. That is, the first and second pads 4, 5
Are formed so as to overlap when the double-sided board 14 constituting the conversion board 42 is projected in the thickness direction. A mini via hole 8 is formed in a region where both pads 4 and 5 overlap. More specifically, the opening of the mini via hole 8 is located at the center of both pads 4 and 5. Therefore, according to this configuration, the first and second
Even if the wiring patterns 6 and 7 are not drawn out from the pads 4 and 5 in the layer direction, conduction between the front and back of the double-sided board 14 can be achieved. For this reason, the pitch of the pads 4 and 5 can be reduced, and the outer dimensions of the conversion board 42 can be further reduced. Therefore, the conversion module 41 can be made more compact. Also, pad 4,
Since there are no obstacles in the space between the five, pattern routing becomes easy, which is convenient for circuit design.

A configuration such as another conversion module 46 shown in FIG. 10 may be used. This conversion module 46 has the same basic configuration as the conversion module 41 of FIG. However, they differ in that the formation positions of the minivia holes 8 are different. That is, in the conversion module 46, the opening of the mini via hole 8 is located on the outer periphery of the pads 4 and 5. Therefore, the opening is located below the solder resist 17. Therefore, this conversion module 46 also has the same operation and effect as the other example of FIG. In addition, the mini via hole 46 has the solder resist 1
7, the reliability is also increased.

The male pin 33 used in the second embodiment is not limited to a nail head, but may have a simple shape, for example. However, a nail head shape is more advantageous for improving reliability as described above.

The insulating substrate forming the double-sided board 14 may not be rigid but may be flexible. ◎ Socket type pin 1 female with both sides batch reflow
Instead of the method of the first embodiment in which the solders 5 and 16 are soldered, a method of reflowing one surface at a time may be adopted. Similarly, for the second embodiment, a method of reflowing one surface at a time may be employed.

A first pad 4 and a second pad 5
May be formed so as to completely overlap when the double-sided plate 14 is projected in the thickness direction, or may be formed so as to partially overlap. In the case where it is not necessary to adopt the configuration shown in FIGS.
Do not necessarily have to be formed in an overlapping positional relationship.

The male pin 33 used in the second embodiment may be changed to a different type of connection terminal according to the structure of the motherboard MB. For example, a spherical or cylindrical bump may be used as a connection terminal, and the bump may be surface-mounted on the second pad 5 with solder S1. Further, instead of projecting the lower end 22b of the male pin 22 used in the first embodiment from the back surface, a different type of connection terminal may be provided on the back surface instead.

Instead of using the PGA 21 as the semiconductor package, another type of package (for example, BGA) may be used, and active components other than the semiconductor package may be used.

Here, in addition to the technical ideas described in the claims, the technical ideas grasped by the above-described embodiments are listed below together with their effects. (1) The conversion module according to any one of claims 1 to 3, wherein a diameter of the mini via hole is 200 µm or less. With this configuration, since the external dimensions of the conversion board can be reduced, the conversion module can be reliably made compact.

(2) In any one of the second to third aspects, the solder resist having an opening is formed on the conversion substrate, and the diameter of the opening is equal to that of the second pad. A diameter of the male pin is smaller than a diameter of the male pin; a region excluding an outer peripheral portion of the second pad is exposed from the opening; and a diameter of a base end of the male pin is smaller than a diameter of the opening. module. With this configuration, since a solder fillet having a suitable shape is formed at the joint portion, high reliability of the conversion module can be secured.

(3) The conversion module according to claim 2 or 3, wherein the male pin has a nail head shape. With this configuration, the presence of the nail head prevents the male pin from coming off, so that the bonding strength is improved and, as a result, the conversion module can have high reliability.

(4) In Claim 3, the opening of the mini-via hole is located on the outer periphery of the pad, and the opening is located below the solder resist formed on the conversion substrate. And a conversion module. With this configuration, the mini via hole is protected by the solder resist, thereby achieving high reliability.

The technical terms used in this specification are defined as follows. "Solder: Pb-Sn based solder containing lead and tin as main components such as eutectic solder, etc.
Pb-less solders such as n-based and Bi-based are also included. "

[0062]

As described in detail above, according to the first aspect of the present invention, it is possible to provide a compact, low-cost conversion module having a simple structure.

According to the second aspect of the present invention, further reduction in size can be achieved by reducing the height, and further reduction in cost can be achieved by simplifying the overall configuration.

According to the third aspect of the present invention, since the external dimensions of the conversion board can be reduced, the conversion module can be made more compact. In addition, the ease of pattern routing facilitates circuit design.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a use state of a conversion module according to a first embodiment of the present invention.

FIG. 2 is a schematic view showing a state in which a conversion board and a socket board which also constitute the conversion module are disassembled.

FIG. 3 is an enlarged sectional view of a main part of the conversion module.

FIG. 4 is a schematic plan view of the conversion module.

FIG. 5 is a partially enlarged plan view showing a pad, a wiring pattern, and a mini via hole of the conversion substrate.

FIG. 6 is a schematic diagram showing a use state of the conversion module according to the second embodiment.

FIG. 7 is a schematic diagram showing a conversion substrate.

FIG. 8 is an enlarged sectional view of a main part of the conversion module.

FIG. 9 is an enlarged sectional view of a main part of another conversion module.

FIG. 10 is an enlarged cross-sectional view of a main part of another conversion module.

FIG. 11 is a schematic diagram showing a state before an upgrade in a conventional technique.

FIG. 12 is a schematic diagram showing a state after an upgrade in the related art.

FIG. 13 is an enlarged sectional view of a main part of a conventional conversion module.

[Explanation of symbols]

1, 31, 41, 46 conversion module, 2, 32, 4
2 conversion board, 3 socket board, 4 first pad,
Reference numeral 5: second pad, 8: mini via hole, 14: double-sided board, 15: first female-type socket-like pin, 16: second female-type socket-like pin, 21: PGA as a semiconductor package, 22, 33: Male pin, 23: Mold resin part as base material, 24: I / O pin, MB: Motherboard.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-246887 (JP, A) JP-A-64-50551 (JP, A) JP-A-8-227970 (JP, A) 152267 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01L 23/32 H01L 25/00 H01R 33/76 H01L 23/12 H05K 1/14

Claims (3)

(57) [Claims] 1. A conversion module interposed between a semiconductor package having I / O pins and a motherboard on which the semiconductor package is mounted, wherein the socket substrate has male and female pins protruding on both front and back surfaces of a base material. A first female socket having a first pad formed on the front side of the double-sided board and a second pad formed on the back side, and the I / O pin being insertable into and removable from the first pad; A pin is soldered, a second female socket-like pin for fitting the male pin into the second pad is soldered, and a mini-via for conducting the conductive layers on the front and back of the double-sided board. A conversion module comprising: a conversion substrate having holes formed therein. 2. A conversion module interposed between a semiconductor package having I / O pins and a motherboard on which the semiconductor package is mounted, wherein a first pad is formed on a front side of a double-sided board and a back side is formed. A second pad is formed, a female socket pin into which the I / O pin can be inserted and removed is soldered to the first pad, a male pin is soldered to the second pad, A conversion module comprising a conversion substrate formed with mini-via holes for conducting the conductive layers on the front and back. 3. The first and second pads are formed in a positional relationship at least overlapping when the double-sided board is projected in the thickness direction, and the mini-via hole is formed in a region where both pads overlap. The conversion module according to claim 1, wherein the conversion module is formed.