Heat sink

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Three cases of the heat sink

Heat sink on the motherboard

A heat sink (British: heat sink) is heat radiation, a part to do a part of the structure of the machine for the purpose of absorbing it.

Table of contents

Summary

Metal such as good aluminum, iron, copper of heat transfer properties is often used as materials mainly. Size, the shape is multifarious, and, by the use, as for the small thing, there is the big thing to around several hundred meters from number mm.

The performance of the heat sink is expressed by thermal resistance, and a thing having a small thermal resistance is high in performance in the general use. The thermal resistance is often molded as a shape (a pinholder form and the bellows form that a board and the stick called the fin generally grew) that surface area becomes large to give a rule, the performance of the heat sink by materials, size, the shape of the heat sink.

I may attach a fan for the purpose of increasing heat radiation, quantity to absorb.

Use

• Cooling of the semiconductor element
• Refrigerators such as a refrigerator, the air-conditioner
• Radiator of the car
• Condenser of heat, the nuclear power generation
• Vaporizers such as fuel or the liquid nitrogen

Special heat sink

Because it is in the high temperature that a lot of calorific value spends 100 degrees Celsius as for the power transistor for the high output motor control including the recent hybrid car, in addition, it is required from a semiconductor running a fever to a heat sink in cooling performance of heat sink in itself to be low thermal resistance. Therefore a ceramic material having high thermal conductivities such as aluminum nitride or the silicon nitride is used for an insulator. In addition, copper molybdenum alloy and aluminum - silicon carbide complex that coefficient of thermal expansion is near a semiconductor are used for a heat radiation board for prevention of destruction of an insulator and a semiconductor and the solder by thermal expansion differences and heat sink.

References

• For Investigation Committee for Takeshi Ogiso "heat design industry of the electronic circuit", 1,989 years, it is ISBN 4769310781

Allied item

• Cooling method of the electric apparatus
• ヒートスプレッダ
• Heat pipe
• Air-cooling

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It is acquired by "https://ja.wikipedia.org/w/index.php?title= heat sink &oldid=62550456"

This article is taken from the Japanese Wikipedia Heat sink

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