JP2003322483A - Plate type heat pipe and method for manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plate type heat pipe having a plurality of continuously arranged cavity parts formed of extruded materials for easily opening fitting holes to fit a heat generating body or the like, and a method for manufacturing the same. <P>SOLUTION: This plate type heat pipe comprises an upper plate part, a lower plate part, and a bulkhead part in a separable manner from each other, and has a plurality of cavity parts continuously arranged along the longitudinal direction, and communication parts to communicate the plurality of cavity parts with each other. The plate type heat pipe is formed of a sealed container having a joined part formed by joining a part of the upper plate part and the lower plate part with each other to form at least one of the plurality of cavity parts. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate-type heat pipe suitable for cooling a heating element of an electronic component such as a semiconductor chip or an optical component, and a manufacturing method thereof.

[0002]

2. Description of the Related Art Electronic components such as semiconductor devices mounted on electric and electronic devices such as CPUs of personal computers, laser light emitting diodes, power transistors, etc. are unavoidably heated to some extent due to their use. And the cooling is becoming an important technical issue. As a method of cooling the electric / electronic element that requires cooling, for example, a fan is attached to the equipment to lower the temperature of the air in the equipment housing, or a cooled body is attached to the cooled element to cool the cooled element. A method of directly cooling is typically known.

As a cooling body attached to the element to be cooled, a plate material made of a material having excellent heat conductivity such as a copper material or an aluminum material, or a plate heat pipe is often applied. The plate heat pipe is a plate heat pipe. As a material for the heat pipe, copper (C
1020, C1100, C1200), aluminum (A1010, A1100, A5000 series, A6000)
System, A7000 series) is used. Examples of the heat pipe manufacturing method include extrusion, forging, casting, and caulking after pressing.

The heat pipe will be briefly described. The heat pipe is a container having a hollow portion, and a working fluid (working fluid) is enclosed in the hollow portion. The cavity is evacuated so that the working fluid easily evaporates. As the working fluid, water, alcohol, CFC substitute, or the like is used in consideration of compatibility with the material of the container.

The operation of the heat pipe will be briefly described. That is, on the heat absorption side of the heat pipe, the working fluid evaporates due to the heat that has been transferred by heat conduction through the material of the container that constitutes the heat pipe, and the vapor moves to the heat radiation side of the heat pipe. On the heat radiation side, the vapor of the working fluid is cooled and returns to the liquid phase state again. Then, the working fluid that has returned to the liquid phase moves (refluxes) to the heat absorption side again.
Heat is transferred by such phase transformation and transfer of the working fluid.

The circulation of the working fluid is performed by gravity or a capillary phenomenon. In the case of a gravity type heat pipe, the working fluid recirculates by disposing the heat absorbing portion below the heat radiating portion. In the case of a heat pipe that recirculates the working fluid by capillarity, a groove is provided on the inner wall of the cavity, or a wick such as a metal mesh or a porous body is inserted inside the cavity, and the capillary fluid by the groove or wick causes the working fluid to flow. Reflux. As described above, in the heat pipe, a large amount of heat is transported by the phase transformation and movement of the working fluid enclosed in the closed cavity of the heat pipe. Of course, there is also heat that is carried by conducting heat through the container that makes up the heat pipe,
The amount is relatively small.

As a conventional plate heat pipe, there is a heat pipe using an extruded material such as aluminum. A plate-type heat pipe is thermally connected to the heating element mounted on the printed circuit board, and the plate-type heat pipe diffuses the heat of the heating element. Heat is dissipated by the heat sink that is placed as
FIG. 7 shows a plate heat pipe made of a conventional extruded material. As shown in FIG. 7, in the plate heat pipe 102, holes 104 each having a cross section of 1.4 × 3 mm and formed of an extruded material of aluminum are separated by partition walls, and a plurality of holes 104 are arranged in parallel in the lateral direction. It has a cavity portion formed individually and has a thickness of 1.9 mm and a width of 60 mm. Both ends thereof are joined to form a sealed body, and the hydraulic fluid is injected into the inside. The length of the plate heat pipe can be arbitrarily determined. Wick 105 such as wire if necessary
May be inserted into each hole 104. The conventional plate heat pipe thus formed is flat on both sides,
It is light, thin and can be bent. 8 and 9 show a conventional heat sink. FIG. 9 is a cross-sectional view taken along the line 9-9 in FIG. As shown in FIG. 8, a plate-shaped heat pipe is provided so as to contact the heating element 108 mounted on the substrate 107, and a radiation fin is provided on the plate-shaped heat pipe.

[0008]

However, the plate type heat pipe using an extruded material such as aluminum has the following problems. That is, it is difficult to form a mounting hole for mounting a heating element or the like on the plate heat pipe. When the mounting hole is processed, there is a problem in that a leak occurs in the processed portion of the heat pipe and the heat pipe does not function as a heat pipe. Further, even when the mounting hole is successfully processed and joined so as to prevent leakage, the portion where the mounting hole is formed does not function as a heat pipe because the cavity is divided in the middle. There is. Furthermore, when joining with the heating element,
There is a problem that a separate part is required and the structure becomes complicated. Therefore, an object of the present invention is to provide a plate heat pipe having a plurality of cavities arranged in parallel and formed by an extruded material, and a method for manufacturing the same, in which mounting holes for mounting a heating element or the like are easily processed. To do.

[0009]

The inventor has conducted extensive studies to solve the above-mentioned conventional problems. As a result, the upper plate part, the lower plate part, and the plurality of cavity parts that are separated from each other by the partition wall part and are arranged in parallel along the major axis direction, and the communication part that communicates the plurality of cavity parts are provided. Prepare,
Then, a part of the upper plate and the lower plate forming at least one of the plurality of cavities are joined to form a joint, and a mounting hole is formed in the joint to attach the heating element or the like. It was found that a plate-type heat pipe with easy mounting holes for forming is formed. In particular, if the width of the cavity having the joint is larger than the widths of the other cavities,
It turned out to be more effective.

The present invention has been made on the basis of the above-mentioned research results, and the first aspect of the plate heat pipe of the present invention is such that an upper plate portion, a lower plate portion, and a partition wall portion mutually provide A plurality of cavities that are separated and arranged in parallel along the long axis direction, and a communication part that communicates the cavities are formed, and at least one of the cavities is formed. It is a plate-type heat pipe including a sealed container having a joint formed by joining a part of an upper plate part and a lower plate part.

A second aspect of the plate-type heat pipe of the present invention is a plate-type heat pipe in which the flat surface of either the upper plate part or the lower plate part forming the joint is maintained flat.

A third aspect of the plate heat pipe of the present invention is a plate heat pipe having a mounting hole formed in at least one of the joints.

A fourth aspect of the plate heat pipe of the present invention is a plate heat pipe in which the width of the hollow portion having the joint portion is larger than the width of other hollow portions.

A fifth aspect of the plate heat pipe of the present invention is a plate heat pipe in which the joint portions have different sizes and shapes.

A sixth aspect of the plate heat pipe of the present invention is a plate heat pipe in which the container is made of extruded aluminum.

A seventh aspect of the plate heat pipe of the present invention is a plate heat pipe having a nut in the mounting hole.

In an eighth aspect of the plate heat pipe of the present invention, the joint portion is formed by bending both ends at predetermined positions and thermally connecting the heating element to one end of the both ends. And a mounting hole portion, and the plate-type heat pipe is provided with the joining portion for thermally connecting the heat sink to the other end portion of the both end portions and the mounting hole portion.

A first aspect of the method for producing a plate heat pipe of the present invention is a method for producing a plate heat pipe comprising the following steps:
A container having a plurality of cavities that are separated from each other by an upper plate portion, a lower plate portion, and a partition wall portion and are arranged in parallel along the longitudinal direction is formed, and the plurality of containers are provided at both end portions of the container. Forming a communicating portion that communicates the hollow portions of the upper plate portion and the lower plate portion forming at least one of the plurality of hollow portions to form a joint portion, and A wick is charged and a working fluid is enclosed to prepare a sealed container.

Another aspect of the method for manufacturing a plate heat pipe of the present invention is a plate heat pipe for forming the joint by maintaining the flat surface of one of the upper plate part and the lower plate part. Is a manufacturing method.

Another aspect of the method of manufacturing a plate heat pipe of the present invention is a method of manufacturing a plate heat pipe in which a mounting hole is formed in at least one of the joints.

Another aspect of the method for manufacturing a plate-type heat pipe of the present invention is a plate-type mold for forming the container so that the width of the cavity having the joint is larger than the width of the other cavity. It is a manufacturing method of a heat pipe.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION A plate heat pipe and a method for manufacturing the same according to the present invention will be described in detail with reference to the drawings.
The plate-type heat pipe of the present invention includes a plurality of cavities that are separated from each other by an upper plate part, a lower plate part, and a partition wall part and are arranged in parallel along the long axis direction, and the plurality of cavities. A sealed container having a communication part for communicating the parts and having a joint part formed by joining a part of an upper plate part and a lower plate part forming at least one of the plurality of cavity parts. Is a plate type heat pipe.

Further, in the plate heat pipe of the present invention, the flat surface of one of the upper plate portion and the lower plate portion forming the joint is maintained. Furthermore, it has a mounting hole formed in at least one of the joints. It is preferable that the width of the cavity having the above-mentioned joint is larger than the width of the other cavities.

FIG. 2 is a perspective view showing an aluminum extruded material used in the plate heat pipe of the present invention.
As shown in FIG. 2, the extruded aluminum material is separated from each other by the upper plate portion, the lower plate portion, and the partition wall portion,
It is provided with a plurality of cavities arranged in parallel along the long axis direction. The cavity comprises a hole 4 of normal size and a large hole 14. Further, as shown by the dotted line in FIG. 2, a plurality of cavities 4 and 14 are arranged in parallel. It is possible to connect the cavities by providing the communicating portions for communicating the cavities at both ends of the aluminum extruded material thus formed.

The method of manufacturing a plate heat pipe according to the present invention is a method of manufacturing a plate heat pipe comprising the following steps: namely, by an aluminum extruded material, by an upper plate part, a lower plate part, and a partition part. Separated from each other,
At least one of the plurality of cavities is formed by forming a container having a plurality of cavities arranged in parallel along the long axis direction, and forming a communication part for communicating the plurality of cavities at both ends of the container. Part of the upper plate part and the lower plate part that form one to form a joint part, and insert a wick into the cavity part,
Prepare a sealed container containing the working fluid.

FIG. 3 shows a method of forming mounting holes in the aluminum extruded material described above. First, an aluminum extruded material is used to form a container having a plurality of cavities that are separated from each other by an upper plate portion, a lower plate portion, and a partition wall portion and are arranged in parallel along the long axis direction.
That is, as shown in FIG. 3A, the aluminum extruded material has a cavity portion corresponding to a portion where the mounting hole is processed,
It is formed by a hole 14 having a laterally longer cross section than the normal hole 4. Usually, the container is formed by extrusion, but it may be formed by machining such as cutting if necessary.

Then, the upper plate portion and the lower plate portion forming at least one of the plurality of hollow portions are joined together to form a joined portion. As shown in FIG. 3B, at a predetermined position of the cavity formed by the horizontally long holes 14, one plate member (for example, the upper plate part) is maintained in a flat state while the other plate member (for example, the lower plate part) is maintained. Is pressed against the upper plate portion side to form a joint portion 5 of the upper plate portion and the lower plate portion. As described above, the joint portion 5 is formed by maintaining the flat state of the upper plate portion side as it is and deforming only the lower plate portion side. At that time, as shown in FIG. 3 (b), the hollow portion formed of the horizontally long hole has a smaller cross-sectional lateral width at the joint portion, forming a closed curve. Therefore, the horizontally long hollow portion in which the joint portion is formed at the predetermined position also remains sealed.

As a joining method, metal joining is desirable. Alternatively, bonding by adhesion may be used. At the time of joining, it is excellent in airtightness and a helium leaktight seal is required. Specific joining methods include pressure welding, ultrasonic welding, and a method using an epoxy adhesive. In the case of joining, when it becomes thinner than the plate thickness, for example, joining is performed so that the flat surface portion is located on the upper side as described above, or conversely,
Join so that the flat portion is located on the lower side.

Next, a mounting hole is formed in the joint thus formed. That is, as shown by the arrow in FIG. 3C, the mounting hole 6 having a predetermined size and a predetermined shape is formed in the formed joint portion 5. Even if the mounting hole is formed,
The cavity in which the joint is formed remains sealed. As described above, the contact surface can be kept flat by maintaining the flat state of any one surface of the container.

FIG. 4 is a view showing a portion of the container in which a joint portion and a mounting hole are formed and both ends thereof are closed. As shown in FIG. 4, the joint portion 5 and the joint portion 5 are formed along the major axis direction of the hollow portion having a cross section of the container 2 formed of a horizontally long hole.
The plus mounting hole 6 is formed at a predetermined position.
In the embodiment shown in FIG. 4, the upper plate portion is deformed toward the lower plate portion to form the joint portion 5. Figure 4
The lower plate portion of the container shown in Fig. 2 maintains a flat state.

By forming the joint portion in this manner, the pressure resistance of the hollow portion formed of a hole having a horizontally long cross section, that is, the ability to withstand the internal pressure of the hydraulic fluid is improved. Further, although the joint portion and the joint portion plus mounting hole are provided in the cavity portion having the laterally long hole as described above, the peripheral portion of the joint portion is opened and the inside of the cavity portion is communicated with the heat pipe. Function as.

FIG. 1 is a view showing a mounting example in which the plate heat pipe of the present invention is attached to a heat generating component mounted on a substrate. In the example shown in FIG. 1, in a container formed by extruding an aluminum material and having a hollow portion formed by a hole having an elongated cross section in a normal porous tube, as described above, the lower plate portion of the container is the upper plate portion. A joint portion 5 of the upper plate portion and the lower plate portion, which is formed by being deformed toward, and a mounting hole 6 further formed in the joint portion thus formed are provided.

The container thus formed is provided at both ends thereof with a communicating portion for communicating the hollow portion,
Inside the cavity, insert a wick and seal the working fluid,
After vacuuming, it was sealed. In the above-mentioned container, as shown in FIG. 4, a joint portion and a joint portion plus mounting hole are provided at predetermined positions along the long axis direction of the hollow portion having a laterally long cross section. As described above, the peripheral portion of the joint portion is opened, the inside of the hollow portion communicates with each other, and the communication portions at both ends communicate with each other to function as a heat pipe.

A heat sink 3 having a plurality of heat radiation fins is joined to one surface of the container. The heating element 8 mounted on the printed circuit board 7 is connected to the center of the other surface of the container via a heat conductive sheet. A threaded nut 10 is fitted in the lower portion of the mounting hole 6 of the container 2 between the container 2 and the printed circuit board 7. Further, the screw 9 is screwed into the threaded hole through the mounting hole 6 in the screw recess provided at a predetermined position of the heat sink. In this way, the container, one surface of which is closely connected to the heating element, can be fixed on the printed circuit board.

FIG. 5 is an enlarged view showing another example of a mounting method in which the plate heat pipe of the present invention is attached to a heat-generating component mounted on a substrate. In this aspect, as will be described later, a nut is provided in the mounting hole, and a screw is inserted from the back surface of the printed circuit board to fix the container in a state of being in close contact with the heating element. In the embodiment shown in FIG. 5 as well, in a container formed by extruding an aluminum material and having a hollow portion formed of a hole having a horizontally long cross section in a normal porous tube, as described above, the lower plate portion of the container is the upper plate portion. A joint portion 5 of the upper plate portion and the lower plate portion, which is formed by being deformed toward one side, and a mounting hole 6 further formed in the joint portion thus formed are provided.

The container thus formed is provided at both ends thereof with a communicating portion for communicating the hollow portion,
Inside the cavity, insert a wick and seal the working fluid,
After vacuuming, it was sealed. In the above-mentioned container, as shown in FIG. 4, a joint portion and a joint portion plus mounting hole are provided at predetermined positions along the long axis direction of the hollow portion having a laterally long cross section. As described above, the peripheral portion of the joint portion is opened, the inside of the hollow portion communicates with each other, and the communication portions at both ends communicate with each other to function as a heat pipe.

A heating element 8 mounted on the printed circuit board 7 is connected to the center of one surface of the container via a heat conductive sheet. A threaded nut 20 is fitted in the lower portion of the mounting hole 6 of the container 2 between the container 2 and the printed circuit board 7. In this aspect, the screw 19 is screwed into the threaded hole of the threaded nut from below the printed board through the through hole provided in the board. In this way, the container, one surface of which is closely connected to the heating element, can be fixed on the printed circuit board.

As the material of the plate-type heat pipe container, A1000 series is generally used, but copper series, iron series, ceramics and the like may also be used. Examples of the wick of the capillary structure include wire mesh, sintered metal, metal wool, glass fiber, carbon fiber, ceramic fiber and the like. As the groove formed on the inner wall, there are grooves along the axial direction and the circumferential direction, and grooves such as a rectangle, a trapezoid, and a triangle. As the working fluid sealed in the closed cavity, water, CFC substitute, Florina, cyclopentane, or the like is used depending on the compatibility with the material of the container.

As described above, the plate-type heat pipe which is in contact with the heating element 8 is provided with the cavity portion formed by the normal holes and the cavity portion formed by the horizontally elongated cross section. The cavities can communicate with each other, the working fluid is enclosed inside, and the working fluid evaporated by the heat of the heating element moves through the cavities of the heat pipe having a bottom surface wider than that of the heating element, and is equipped with a radiation fin. Transmitted to the heat sink. A fan is installed above the radiating fins to forcibly cool the heat transferred to the radiating fins.

FIG. 6 is a view showing another mounting example of the plate heat pipe of the present invention. In the plate-type heat pipe of this aspect, bending processing is performed at predetermined positions on both ends of the container, and a joint portion and a mounting hole portion for thermally connecting the heating element to one end portion of both end portions are provided. The other end of each end is provided with a joint and a mounting hole for thermally connecting the heat sink.

As shown in FIG. 6, the plate heat pipe is
An end portion 21 of the container 2 formed by an aluminum extruded material is composed of a container having a hollow portion formed of a hole of a normal perforated pipe and a hollow portion formed of a hole having a horizontally long cross section. Bending is applied to each 22. Each of the ends of the container has a joint formed by deforming one plate of the container toward the other plate, and a mounting hole further formed in the joint formed in this way. It is provided. At one end 22, the screw 9 is fitted into the mounting hole formed at the above-mentioned joint, and the heating element 8 mounted on the printed circuit board 7 and one surface of the plate heat pipe 2 are thermally heated. It is connected and fixed to.

At the other end 21 of the plate heat pipe 2, a screw 9 is fitted into the mounting hole formed at the above-mentioned joint, and a heat radiation fin is provided on one surface of the plate heat pipe 2. The heat sink is thermally connected and fixed. It should be noted that the central portion of the plate heat pipe 2, the vertical portion in FIG. 6, is provided with only a joint portion so as to withstand the internal pressure of the hydraulic fluid. The cavities of the heat pipe can communicate with each other, the working fluid is enclosed inside, and the working fluid evaporated by the heat of the heat generating element reaches the predetermined position in the cavity of the heat pipe that has a wider bottom surface than the heat generating element. Move
It is transmitted to a heat sink equipped with heat dissipation fins. By providing the fan above the heat radiation fins, the heat transferred to the heat radiation fins can be forcibly cooled.

As described above, according to the present invention, the mounting hole can be easily formed in the plate-shaped heat pipe formed of the extruded aluminum material, and the heating element can be easily fixed in a state in which the heating element is in close contact with the heat pipe. be able to. Further, when processing the mounting hole, it can be sealed with helium tight, and a sealed container can be obtained. It is possible to ensure the heat uniformity of the heat pipe, including the cavity that forms the joint and the attachment hole. Further, the formed joint can be used for positioning mounted components such as a heat sink.

[0044]

EXAMPLE A hole having a cross section of a size of 1 × 3 mm formed of an extruded material of aluminum A1050, separated by a partition wall, and having a plurality of cavities formed in parallel in the lateral direction, having a thickness of 1 A container having a width of 0.9 mm and a width of 60 mm was prepared. The above-mentioned container is provided with a cavity portion, which is a laterally long hole larger than the above-mentioned hole, along the major axis direction of the container in the portion where the hole processing is performed.
Of the container thus formed by the extruded material,
The lower plate portion forming the hollow portion formed of the horizontally long hole was deformed toward the upper plate portion to form a joint between the upper plate portion and the lower plate portion of the container. As shown in FIG. 4, in consideration of the position of the mounting hole for fixing to the printed circuit board, a plurality of joints are provided at predetermined positions along the long axis direction of the cavity formed by the horizontally long hole. It was Further, a mounting hole was formed in a part of the joint thus formed. In the cavity where the joint and the attachment hole are formed, the periphery of the joint is open and the inside of the cavity is in communication. In this way, connecting parts that connect the hollow parts to each other are provided at both ends of the container in which the joint part and the mounting hole are formed, and the container is sealed with helium tight to form a sealed body, and the working fluid is depressurized inside. Was injected to prepare a plate-type heat pipe. The above-mentioned joint portion was joined by ultrasonic welding, and a hole having a diameter of 3 mm was formed as a mounting hole. The plate heat pipe prepared as described above is connected to the heating element mounted on the printed circuit board via a heat transfer seal, a nut is placed in the mounting hole, and the plate heat pipe and printed circuit board are fixed with screws. did. As a result, it was possible to maintain the helium-tight tightness of the plate heat pipe prepared by the aluminum extrusion material and easily fix the plate heat pipe to the printed board. In addition, the plate heat pipe and the heating element were easily joined.

[0045]

According to the present invention, a plate-type heat pipe having a plurality of cavities arranged in parallel and formed by an extruded material, in which mounting holes for mounting a heating element or the like are easy, and a method of manufacturing the same. Can be provided.

[Brief description of drawings]

FIG. 1 is a sectional view showing a mounting example in which the plate-type heat pipe of the present invention is attached to a heat-generating component mounted on a substrate.

FIG. 2 is a perspective view showing an aluminum extruded material used for the plate heat pipe of the present invention.

FIG. 3 shows the aluminum extruded material described above,
A method of processing the mounting hole will be described.

FIG. 4 is a view showing a joint and a mounting hole formed;
It is a figure which shows the part of the container with which both ends were closed.

FIG. 5 is an enlarged view showing another example of a mounting method in which the plate heat pipe of the present invention is attached to a heat-generating component mounted on a substrate.

FIG. 6 is a diagram showing another mounting example of the plate heat pipe of the present invention.

FIG. 7 is a diagram showing a plate heat pipe made of a conventional extruded material.

FIG. 8 is a diagram showing a conventional heat sink.

9 is a cross-sectional view taken along the line AA ′ in FIG.

[Explanation of symbols]

2. Plate type heat pipe (container) 3. heatsink 4. Cavity 5. Joint 6. Mounting hole 7. Printed board 8. Heating element 9. screw 10. nut 14. Cavity with oblong cross section 20. nut 21. edge 22. edge 102. Container made of extruded material (perforated pipe) 104. Cavity 105. Wick 107. Printed board 108. Heating element (element)

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Takahiro Shimura             2-6-1, Marunouchi, Chiyoda-ku, Tokyo             Kawa Electric Industry Co., Ltd. F-term (reference) 5F036 AA01 BB60 BD03

Claims (9)

[Claims] 1. A plurality of cavities that are separated from each other by an upper plate portion, a lower plate portion, and a partition wall portion and are arranged in parallel along a long axis direction, and communicate the plurality of cavity portions. A plate mold made of a hermetically sealed container having a communication part and having a joint part formed by joining a part of an upper plate part and a lower plate part forming at least one of the plurality of cavity parts. heat pipe. 2. The plate heat pipe according to claim 1, wherein the flat surface of one of the upper plate portion and the lower plate portion forming the joint is maintained flat. 3. The plate heat pipe according to claim 1, further comprising a mounting hole formed in at least one of the joints. 4. The cavity according to claim 1, wherein a width of the hollow portion having the joint portion is larger than a width of another hollow portion.
The plate-type heat pipe according to item. 5. The plate heat pipe according to claim 1, wherein the joint portions have different sizes and shapes. 6. The plate heat pipe according to claim 1, wherein the container is made of extruded aluminum. 7. The plate heat pipe according to claim 3, wherein a nut is provided in the mounting hole. 8. A bending process is applied to predetermined positions of both ends, and one end of the both ends is provided with the joint portion and the mounting hole portion for thermally connecting a heating element. The joint portion and the mounting hole portion for thermally connecting a heat sink are provided at the other end portion of
The plate-type heat pipe according to. 9. A method of manufacturing a plate heat pipe comprising the following steps: an aluminum extruded material, an upper plate portion,
A container having a plurality of hollow portions separated from each other by the lower plate portion and the partition wall and arranged in parallel along the longitudinal direction is formed, and the plurality of hollow portions are provided at both ends of the container. A communication part is formed to communicate with each other, and a part of an upper plate part and a lower plate part forming at least one of the plurality of hollow parts are joined to form a joint part, and a wick is inserted into the hollow part. Then, a working fluid is enclosed to prepare a sealed container.