Heat-radiating base plate and heat sink using the same

Abstract

A heat-radiating base plate includes an aluminum-made upper base plate, a copper-made lower base plate, and a heat pipe unit. The upper base plate has a first face, an opposite second face, and a slotted pattern extended through the upper base plate in a thickness direction to communicate the first face with the second face. The heat pipe unit is set in the slotted pattern, and has a thickness equal to a depth of the slotted pattern. The heat pipe unit has a first and a second heat-conducting flat face flush with the first and the second face of the upper base plate, respectively. The second face and the second heat-conducting face are attached to the lower base plate, which has another flat face in contact with a heat-producing unit. A radiating fin assembly can be mounted to a top of the heat-radiating base plate to provide a heat sink.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a heat-radiating base plate, and more particularly to a weight-reduced heat-radiating base plate including an aluminum-made upper base plate formed of a slotted pattern for a heat pipe unit to set therein, and a copper-made lower base plate corresponding to and attached to the upper base plate without losing its flatness. The present invention also relates to a heat sink including a radiating fin assembly mounted to a top of the heat-radiating base plate.BACKGROUND OF THE INVENTION[0002]With the rapidly developed information, communication, and photoelectric industries, various highly advanced, lightweight and compact electronic products have been introduced into the market. Due to the demands for high operating speed and miniaturized volume, the electronic elements in the various electronic products produce more heat during the operation thereof to thereby have constantly increased heat density. Therefore, heat dissipatio...

AI Technical Summary

Benefits of technology

[0007]A primary object of the present invention is to provide a heat-radiating base plate that can be more easily manufactured without detriment to the flatness behind areas having been machined to form needed slotted pattern and can therefore ensure good contact of heat pipes set on the heat-radiating base plate with a heat-producing unit and radiating fins.

[0008]Another object of the present invention is to provide a heat-radiating base plate that includes an upper base plate made of an aluminum material to reduce an overall weight of the heat-radiating base plate and the use of copper material in forming the heat-radiating base plate.

[0009]A further object of the present invention is to provide a heat sink being formed by mounting a radiating fin assembly to a top of the heat-radiating base plate provided by the present invention, so as to enable good heat dissipation.

[0011]And, the heat sink according to the present invention includes a radiating fin assembly mounted to a top of the first face of the heat-radiating base plate of the present invention. The radiating fin assembly includes a plurality of stacked and spaced radiating fins. With the heat pipe unit set in the slotted pattern, the first face of the aluminum-made upper base plate attached to the radiating fin assembly, and the second face of the upper base plate attached to the copper-made lower base plate, the heat sink of the present invention can provide enhanced heat dissipation effect.

[0012]In brief, with the above arrangements, the present invention has the following advantages: (1) less copper material is used to manufacture the heat-radiating base plate; (2) the problem of overweight heat-radiating base plate caused by using too much copper material is solved; (3) no second-time machining is needed in forming the slotted pattern; and (4) flatness at areas of the lower base plate behind the slotted pattern can be maintained.

Problems solved by technology

In the prior art, when forming the S-shaped channel 111 and the U-shaped channel 112 on the base 11, it is uneasy to control the depth of the S-shaped channel 111 and the U-shaped channel 112 and therefore frequently results in the problem of error in size.

Furthermore, since a large quantity of copper material is used to manufacture the base 11, the base 11 is usually overweight.

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