Fujikura Limited

International Business Machines Corporation

Youji Kawahara

Koichi Mashiko

Yuji Saito

Masataka Mochizuki

Hiroaki Agata

Fumitoshi Kiyooka

Yuichi Yokoyama

Noriyuki Takada

Tetsuya Kobayashi

Mohammad Shahed Ahamed

Akihiro Takamiya

Thanhlong Phan

Tadashi Sano

In a heat spreading module, a plurality of hollow paths is formed in a thin plate-shaped main body so as to pass though the heating portion, and the hollow paths communicate with each other in a heating portion, a working fluid is enclosed in the hollow paths, a wick is disposed in each of the hollow paths such that a vapor flow path in which vapor of the working fluid flows is formed in each of the hollow paths, a part of each wick is positioned at the heating portion, and the vapor flow paths formed in the hollow paths communicate with each other in the heating portion.

Heat spreading module

A heat pipe wherein a condensable liquid phase working fluid is encapsulated in a container sealed in air-tight condition; wherein the wick composed of the porous body for refluxing the liquid phase working fluid by a capillary pressure is provided in the container; wherein a part of the container functions as an evaporating part for evaporating the working fluid by means of inputting the heat from outside; and wherein another part of the container functions as a condensing part for condensing a vapor of the working fluid by means of radiating the heat to the outside; comprises a direct reflux flow passage for flowing the liquid phase working fluid to the evaporating part, which has a flow cross-sectional area greater than that of a cavity formed in the porous body.

Heat pipe excellent in reflux characteristic

A vapor chamber, in which a condensable fluid, which evaporates and condenses depending on a state of input and radiation of a heat, is encapsulated in a hollow and flat sealed receptacle as a liquid phase working fluid; and in which the wick for creating the capillary pressure by moistening by the working fluid is arranged in said sealed receptacle, comprising: a wick for creating a great capillary pressure by being moistened by said working fluid, which is arranged on the evaporating part side where the heat is input from outside; and a wick having a small flow resistance against the moistening working fluid, which is arranged on the condensing part side where the heat is radiated to outside.

Vapor chamber

Growing community of inventors

Tokyo, Japan

Youji Kawahara