Patent ID: 11859913
Assignee: DAI NIPPON PRINTING CO., LTD.
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F  H | IPC F  H

Claim 0:
1. A wick sheet for a vapor chamber, in which a
working fluid is enclosed, the wick sheet comprising:
a sheet body having a first body surface and a second body surface provided on an opposite side from the first body surface;
a penetration space that penetrates the sheet body;
a first groove assembly provided on the second body surface, the first groove assembly communicating with the penetration space; and
a second groove assembly provided on the first body surface, the second groove assembly communicating with the penetration space, wherein
the first groove assembly includes:
a plurality of first mainstream grooves that extend in a first direction, and

a plurality of convex portions arranged between neighboring first mainstream grooves,
the second groove assembly includes:
a plurality of second mainstream grooves that extend in the first direction, and a plurality of convex portions arranged between neighboring second mainstream grooves,

a flow channel cross-sectional area of a second mainstream groove of the plurality of second mainstream grooves is greater than a flow channel cross-sectional area of a first mainstream groove of the plurality of first mainstream grooves, and

a total area of the second groove assembly on the first body surface is smaller than a total area of the first groove assembly on the second body surface in a plan view of the wick sheet.