US 11,058,031 B2
Vapor chamber
Tatsuhiro Numoto, Nagaokakyo (JP); Takuo Wakaoka, Nagaokakyo (JP); Atsushi Kishimoto, Nagaokakyo (JP); and Osamu Chikagawa, Nagaokakyo (JP)
Assigned to MURATA MANUFACTURING CO., LTD, Nagaokakyo (JP)
Filed by Murata Manufacturing Co., Ltd., Nagaokakyo (JP)
Filed on Sep. 19, 2019, as Appl. No. 16/575,735.
Application 16/575,735 is a continuation of application No. PCT/JP2017/017043, filed on Apr. 28, 2017.
Application PCT/JP2017/017043 is a continuation of application No. PCT/JP2018/016939, filed on Apr. 26, 2018.
Prior Publication US 2020/0060044 A1, Feb. 20, 2020
Int. Cl. H05K 7/20 (2006.01); F28D 15/04 (2006.01); H01L 23/427 (2006.01)
CPC H05K 7/20336 (2013.01) [F28D 15/04 (2013.01); H01L 23/427 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A vapor chamber comprising:
a housing composed of a first sheet and a second sheet facing each other and having outer edge portions thereof joined to each other to define an internal space, the second sheet having a plurality of projecting portions on an inner surface thereof that faces the internal space;
a pillar between the first sheet and the second sheet and supporting the first sheet and the second sheet from the internal space;
a wick in the internal space of the housing; and
a working fluid in the internal space of the housing,
wherein a first flow path is formed between adjacent projecting portions of the plurality of projecting portions together with the wick,
as viewed in a plan view of the vapor chamber, a second flow path is formed in a terminal region between the pillar and the joined outer edge portions along at least one side of the housing, and the second flow path is surrounded by only the second sheet, the projecting portions, and an end of the wick, and
a cross-sectional area of the second flow path is larger than a cross-sectional area of the first flow path.