BOILING HEAT TRANSFER MEMBER, COOLER COMPRISING BOILING HEAT TRANSFER MEMBER, AND COOLING DEVICE COMPRISING BOILING HEAT TRANSFER MEMBER

To provide a boiling heat transfer member capable of controlling the dimension of a recess formed on a surface with which liquid-phase refrigerant is in contact, to boil the liquid-phase refrigerant smoothly.SOLUTION: A boiling heat transfer member 1 made of metal or ceramic, has a cooling surface 10 that is in contact with liquid-phase refrigerant and has a recess 30 on its surface, and a heating surface 20 facing the cooling surface 10, to which an object to be cooled is thermally connected to its surface. The cross section of the recess 30 in a direction parallel to a depth direction of the recess 30 has a first side wall 33 extending from one end of a bottom 32 toward the cooling surface 10, and a second side wall 34 extending from the other end of the bottom 32 toward the cooling surface 10.SELECTED DRAWING: Figure 1 【課題】液相の冷媒が接する面に形成された凹部の寸法を制御することで、液相の冷媒を円滑に沸騰させることができる沸騰伝熱部材を提供する。【解決手段】液相の冷媒と接し、表面に凹部３０を有する冷却面１０と、被冷却体が表面に熱的に接続される、前記冷却面１０と対向した加熱面２０とを有する、金属またはセラミックで形成された沸騰伝熱部材１であって、前記凹部３０の深さ方向に対し平行方向における前記凹部３０の断面が、底部３２の一端から冷却面１０方向へ延在した第１側壁部３３と、該底部３２の他端から冷却面１０方向へ延在した第２側壁部３４とを有する。【選択図】図１