BOILING COOLING DEVICE AND ITS MANUFACTURING METHOD

To provide a boiling cooling device and its manufacturing method, capable of improving cooling performance while securing insulation quality to a heating element.SOLUTION: A boiling cooling device includes; a plate main body portion 1 having a first plate 11 receiving heat, a second plate 12 disposed in opposition to the first plate 11, and a rib portion 13 connecting the first plate 11 and the second plate 12, and forming a refrigerant flow channel 14 between the first plate 11 and the second plate 12; and a boiling acceleration portion 2 disposed on an opposite surface 11b of the first plate 11 and accelerating boiling of a refrigerant. The plate main body portion 1 is composed of ceramics powder for main body, and the boiling acceleration portion 2 is composed of ceramics powder for lamination, having a particle diameter larger than a particle diameter of the ceramics powder for main body. The plate main body portion 1 and the boiling accelerating portion 2 are integrally formed by being sintered, the plate main body portion 1 is a dense sintered body, and the boiling acceleration portion 2 is a particle laminate in which the ceramics powder for lamination is laminated in a particulate form.SELECTED DRAWING: Figure 1 【課題】発熱体に対する絶縁性を確保しつつ、冷却性能を向上できる沸騰冷却装置およびその製造方法を提供する。【解決手段】熱を受熱する第１プレート１１と、第１プレート１１と対向して配置される第２プレート１２と、第１プレート１１と第２プレート１２とを接続するとともに第１プレート１１と第２プレート１２との間に冷媒流路１４を形成するリブ部１３と、を有するプレート本体部１と、第１プレート１１の対向面１１ｂに配置されるとともに、冷媒の沸騰を促進する沸騰促進部２と、を備え、プレート本体部１は本体用セラミックス粉末からなり、沸騰促進部２は本体用セラミックス粉末の粒径よりも粒径の大きい積層用セラミックス粉末からなり、プレート本体部１および沸騰促進部２が焼結されることで一体的に形成されており、プレート本体部１は緻密質焼結体であり、沸騰促進部２は積層用セラミックス粉末が粒子状で積層された粒子積層体である。【選択図】図１