JPH08204073A - Heat radiating body fixing tool - Google Patents

Abstract

PURPOSE: To simplify the fixing work of a heat generating body and a heat radiating body by providing a structure which ensures, even when a fault occurs in any one of the heat generating body and heat radiating body, easier replacement of any defective one without replacing both bodies. CONSTITUTION: A heat radiating body fixing tool comprises main bodies 11 provided opposed to each other in parallel, elastic means 12 connecting the main bodies 11 and a heat radiating body holding means 14 and a heat generating body holding means 141 provided to the main bodies 11 and has the upper area, which is smaller than the upper area of the heat generating body, formed by the main bodies 11 and elastic bodies 12 provided opposed to each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixture for connecting and fixing a semiconductor element such as an LSI having a high heat generation density such as a high speed drive microcomputer and a heat sink for cooling them.

[0002]

2. Description of the Related Art In electric and electronic parts, heat is generated mainly in semiconductor elements due to device integration, product miniaturization, etc., which causes various problems such as product malfunction and device destruction. It is equipped with a heat sink or other radiator.
It actively diffuses and releases this heat. FIG. 8 shows an example of conventional means for adhering a heating element and a radiator. Figure 8 shows a heating element
A perspective view in which a radiator 90 such as a heat sink or a heat pipe is attached to a ceramic package microcomputer by a PGA (Pin Grid Array) 93 is shown. In FIG. 8, P serving as the heating element 93
A laminated heat sink 90 is mounted on the upper surface of the GA microcomputer, and the heating element 93 and the heat sink 90 are
It is adhered using an adhesive such as an epoxy resin.

[0003]

In the prior art described above, the semiconductor element such as a microcomputer as the heat generating element 93 and the heat radiating element 90 are adhered and fixed to each other with an adhesive.
When it is necessary to separate between 93 and the heat radiator 90, for example, replacement of the semiconductor element due to a failure of only the semiconductor element, conversely even if you want to replace only the heat radiator due to damage
Since the semiconductor element and the radiator are formed as a set of parts, it is necessary to replace both of them.

In the means for applying and fixing the adhesive, it is necessary to manage the resin and the adhesive, to perform operations such as application, and when the resin and the adhesive are used, some time is required until they are cured. The efficiency is low, the work is complicated, and the heat radiation effect is also effective because an adhesive agent or the like is interposed between the heat generating element 93 and the heat radiating element 90, which causes a loss in heat conduction between them. Heat dissipation is hindered.

Also, when mounting a semiconductor element on a printed wiring board, the height of the radiator 90 often hinders the mounting, and it is complicated to inspect each part after mounting the semiconductor element on the printed wiring board. Occurs.

The present invention has been made in view of the above problems, and even if a failure occurs in either the heat generating element 93 or the heat radiating element 90, one of the failed parts is not replaced without replacing both of them. Only the structure can be easily replaced,
The purpose is to simplify the work of fixing the heating element 93 and the radiator 90.

[0007]

In order to solve the above-mentioned problems, in the present invention, a main body portion 11 provided in parallel with each other,
An elastic portion 12 that joins each of the main body portions 11 and the main body portion
11 has a heat radiator pressing portion 14 and a heat generator pressing portion 141,
A space between the opposing main body portions 11 is shorter than one side of the heat generating body 93 located on the elastic portion 12 of the heat generating body 93. Elastic part 12
If insulation is required, the circumference of the elastic body may be covered with the tube 123.

Further, in a radiator fixing member 10 having a radiator 90 having a plate having an area substantially equal to the upper surface area of the heating element 93, and the radiator fixing member 10 for joining the radiator 90 and the heating element 93, the upper surface of the heating element 93. At least a part of one side of the main body 11 and the corner of the heat generating element 93 are provided in parallel with each other, and the main body 11 is provided with a heat radiating body pressing portion 14 and a heat generating body holding portion 141. The radiator fixing member may be joined by the elastic body 12 in which the interval between the main body portions 11 is shorter than one side of the heating element 93 when contracted and longer than one side of the heating element 93 when extended.

[Function] With the above configuration, the heating element 93 or the radiator 90
If either one of them fails or is damaged, applying heat to the side surface inward will allow the heat dissipation element to easily separate from the heat dissipation element due to the elasticity of the main body. Can be done. Therefore, there is no need for an adhesive that has been used in the past between the heat generating element and the heat radiating element, or a fixture with no versatility is required. Will be possible. It is also possible to newly add a heat radiator to the existing electronic component, and a heat radiator fixing tool with good versatility can be provided.

[0009]

1 is a top view of a radiator fixing member of the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a perspective view thereof. 1 and 2,
In FIG. 3, the radiator fixing member 10 has two main body portions 11 provided in parallel and two elastic portions 12 similarly provided in parallel. The main body portion 11 and the elastic portion 12 have four sides. Integrated to form a shape. In this embodiment, both longitudinal ends of the main body 11 are processed into L-shapes, and the elastic ends 12 are joined to the processed ends, and these are combined to form a quadrilateral. The length of the main body 11 in the longitudinal direction is designed to be the same as the length of the heat generating body and the heat radiating body arranged therein, and the inner walls of both ends of the L-shaped main body 11 are heat generating bodies. By aligning the heat radiator with the heat radiator, the gap after fixing both is prevented. In the above, the space formed by the main body portion 11-11 and the elastic portion 12-12 is adjusted to be smaller than the area of the heating element.

The main body 11 is made of a synthetic resin such as PBT, PBS, nylon or the like, or a material obtained by insulatingly coating a metal, and two wedge-shaped radiator pressing portions 14-14 are provided on each main body 11. The heating element pressing portion 1 is provided at the corner of the end portion.
41-141 are provided. As the elastic portion 12, the one as shown in FIGS. 5 and 6 is used. That is, the elastic portion 12 is composed of a tube 123 having a good insulating property and an elastic body covered with the tube 123. Here, for the elastic body, for example, the leaf spring 121 shown in FIG. 5, the coil spring 122 shown in FIG. 6, or an elastic rubber material can be used.

The radiator fixing tool 10 is attached to the heating element as follows. The two main body parts 11-11 are extended to the outside in the longitudinal direction of the elastic part 12, and the positions of the heat dissipating member and the heat dissipating member are adjusted so that the heat dissipating member retaining portion 14 and the heat dissipating member retaining portion 141 respectively hang on the heat dissipating member and the heat dissipating member. By the way, the main body 11-11
To the original state. As described above, the interval between the body portions 11-11 is adjusted to be shorter than the length of one side of the heating element by the expansion and contraction of the elastic portion 12-12. Acts in the direction of the heat radiating body and the heat generating body, and both are processed and integrated by the wedge-shaped heat radiating body pressing portion 14 and the heat generating body pressing portion 141.

FIG. 4 shows a diagram in which the heat radiator fixing tool 10 is mounted on a semiconductor element serving as a heating element on a printed wiring board.
In FIG. 4, a heating element 93 is provided on the printed wiring board 20, and a radiator 90 is provided on the heating element 93. In this embodiment, the heat radiator 90 is a multilayer heat sink in which a large number of heat radiation fins are stacked. Here, the heating element pressing portion 141 is arranged on the bottom surface of the heating element 93, and the radiator pressing portion 14 is arranged on the upper surface of the fin (plate) of the heat radiation element 90 on the heating element 93 side. By the action of the portion 141 and the heat radiating body pressing portion 14, the heat radiating body 90 and the heat generating body 93 are integrated.

In the present embodiment, the radiator pressing portion 14
It is sufficient that at least one is provided instead of two, and if this arrangement portion is provided not at the corner of the main body portion 11 but at a position where it can support the bottom side of the heating element 93 as shown in FIG. 7, for example. Similar effects are obtained. Further, in the present invention, since the heating element 93 is a semiconductor, the tube 123 is formed of an insulating material, but a metal material may be used as long as the heating element 93 does not require insulation measures. , Can be omitted altogether. Although a multi-layered heat sink is used for the heat radiator 90, if a part of the heat radiator has at least the opposite sides of the heat generator 93 having substantially the same length, it can be used for other types of heat sinks. Of course.

Further, in the above embodiment, the heating element pressing portion 141
Are arranged at the corners of the inner wall of the main body portion 11, and if this is a place to be caught on the lower surface of the heating element 93, the same effect can be obtained by providing one or more at any place on the main body portion 11.
If the heat generating element 93 and the heat radiating element 90 and the like are provided with a shift preventing process, the end of the main body 11 does not have to be L-shaped. Further, it is sufficient that at least one elastic portion 12 is provided on the main body portion 11, and the number of the elastic portions 12 can be appropriately changed according to usage conditions.

[0015]

With the above structure, if either the conventional heat generating element 93 or the heat radiating element 90 fails or is damaged, the two must be replaced at the same time.
Only the damaged one needs to be replaced, and the heat contact surfaces of the heat generating element 93 and the heat radiating element 90 do not have an adhesive or the like between them, so the heat transfer efficiency between the two becomes good and the function of the heat radiating element becomes effective. work.

Since the radiator fixing member 10 is composed of a small number of parts, it can be assembled and produced very easily and at a low cost. Further, since the radiator fixing tool 10 has a simple structure, the space can be effectively used even when the electric and electronic elements are arranged in the periphery.

[Brief description of drawings]

FIG. 1 is a top view of a radiator fixing tool of the present invention.

FIG. 2 is a side view of the radiator fixing tool of the present invention.

FIG. 3 is a perspective view of a radiator fixing tool of the present invention.

FIG. 4 is a partial side sectional view of the radiator fixing tool of the present invention attached to the radiator.

FIG. 5 is a diagram showing an embodiment of an elastic body of the radiator fixing tool of the present invention.

FIG. 6 is a diagram showing an embodiment of an elastic body of a radiator fixing tool of the present invention.

FIG. 7 is a perspective view of a radiator fixing tool showing another embodiment of the present invention.

FIG. 8 is a perspective view showing a connection between a conventional radiator and a heating element.

[Explanation of symbols]

 In the drawings, the same reference numerals indicate the same or corresponding parts. DESCRIPTION OF SYMBOLS 10 Radiator fixing tool 11 Main body part 12 Elastic part 14 Radiator holding part 141 Heating element holding part 90 Radiator 93 Heating element

Claims (3)

[Claims] 1. A main body which has a main body provided opposite to each other in parallel, an elastic portion for joining the respective main body portions, and a heat radiator pressing portion and a heat generator pressing portion in the main body portion, and the main body opposing each other. A radiator fixing tool having a shorter side of one side located at the elastic portion of the heating element. 2. A heat dissipator fixture comprising a heat dissipator upper surface area and a heat dissipating body having a plate having an area substantially equal to that of the heat dissipating body. A main body portion at which at least a part of one side abuts a corner of the heating element is provided in parallel with each other, and the main body portion is provided with a radiator pressing portion and a heating element holding portion. Is a heat-dissipating body fixture that is joined by an elastic body that is shorter than one side of the heat-generating body when contracted and is longer than one side of the heat-generating body when extended. 3. The radiator fixing tool according to claim 1, wherein the circumference of the elastic body is covered with a tube 123.