High-pressure-resistant flat heat pipe and machining method thereof

Abstract

The invention provides a high-pressure-resistant flat heat pipe and a machining method thereof. The high-pressure-resistant flat heat pipe comprises an upper cover plate, a lower cover plate, capillary cavities and reinforcing ribs, wherein the upper cover plate is connected with the lower cover plate to form an airtight cavity, the reinforcing ribs arranged into a dot matrix are arranged on the upper cover plate and located in the airtight cavity, the upper cover plate is connected with the lower cover plate through the reinforcing ribs, communicated steam channels are arranged outside the reinforcing ribs, the capillary cavities are formed in the outer surfaces of the reinforcing ribs, and each capillary cavity is provided with a plurality of capillary core structures used for adsorbing liquid-phase working media. By arranging the cubic reinforcing ribs on the upper cover plate evenly, the pressure resistance of the flat heat pipe is improved. The inner surface is filled with the capillary cavities provided with the capillary core structures through sintering, and thus antigravity performance is realized.

Description

technical field [0001] The invention relates to heat dissipation of high-power electronic components, in particular to a flat heat pipe with high pressure resistance and a processing method thereof. Background technique [0002] With the rapid development of microelectronics technology, the miniaturization of electronic components has become the mainstream trend in the development of modern electronic equipment. The feature size of electronic devices continues to decrease, but the integration level, packaging density and operating frequency of chips continue to increase, all of which make the power consumption density higher and higher. However, the high connection density of the chip and the small available heat dissipation area lead to a sharp increase in the heat flux density, and a significant increase in the chip temperature seriously affects its working reliability and service life. The energy consumption and heat dissipation of the chip have become the key to restrict...

AI Technical Summary

Problems solved by technology

However, flat heat pipes using working fluids such as water and alcohol are constrained by the boiling point and condensation point of the working fluid, which severely limits the operating temperature range of flat heat pipes.

If ammonia is used as the working fluid, the operating temperature range of the flat heat pipe can be effectively widened (-50°C to 100°C), but compared with water, alcohol or even acetone, the saturated vapor pressure of ammonia is increased by several tens of times (the saturated vapor pressure of ammonia is more than 60 times that of water), which will bring serious pressure resistance problems to the flat heat pipe

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