Abstract: A wick sheet for a vapor chamber includes a first main body surface, second main body surface, frame, and plurality of lands. A vapor passage that extends through from the first main body surface to the second main body surface. The vapor passage through which vapor of a working fluid passes is formed. A liquid channel that communicates with the vapor passage and through which a liquid working fluid passes is formed on the second main body surface side of the lands. An end of the vapor passage in an extension direction is in contact with at least one land, and a first main body surface-side channel that communicates with the vapor passage is formed in a connection region that is on the first main body surface side of the land and in which the end of the vapor passage in the extension direction is in contact with the land.

Abstract: A wick sheet for a vapor chamber includes a first main body surface, a second main body surface located opposite the first main body surface, a frame body section, and a plurality of land sections apart from each other within the frame body section. A vapor path through which a vapor of a working fluid travels is between the plurality of land sections. A liquid flow channel section that communicates with the vapor path and through which the working fluid in a liquid form travels is at the second main body surface side of at least one of the land sections. A bridge that couples the land sections to the frame body section or that couples the land sections to each other is included. The bridge is reduced in thickness from at least one of the first main body surface side and the second main body surface side.