Patent ID: 11859914
Assignee: PIMEMS, INC.
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F  H | IPC F

Claim 0:
1. A thermal ground plane comprising:
a metal substrate having a surface within a vapor chamber;
said vapor chamber in communication with said surface of said metal substrate;
an intermediate substrate within said vapor chamber having a first set of cross members in one direction and a second set of cross members in another direction connected to said first set of cross members, said first set of cross members being in a separate and adjacent plane from said second set of cross members, said first set of cross members defining channels between said cross members adjacent within said first set, and said second set of cross members defining channels between said cross members adjacent within said second set, said channels between said first set of cross members and said channels between said second set of cross members intersecting to form apertures bounded by said cross members;
a second intermediate substrate within said vapor chamber having a first set of cross members in one direction and a second set of cross members in another direction connected to said first set of cross members in said second intermediate substrate, said first set of cross members in said second intermediate substrate being in a separate and adjacent plane from said second set of cross members in said second intermediate substrate, said first set of cross members in said second intermediate substrate defining channels between said cross members adjacent within said first set within said second intermediate substrate, and said second set of cross members within said second intermediate substrate defining channels between said cross members adjacent within said second set within said second intermediate substrate, said channels between said first set of cross members in said second intermediate substrate and said channels between said second set of cross members in said second intermediate substrate intersecting to form second apertures bounded by said cross members in said second intermediate substrate, said second intermediate substrate being adjacent to said intermediate substrate and said second apertures in said second intermediate substrate being shifted from said apertures in said intermediate substrate to define a fluid path through said apertures in said first and second intermediate substrates, said fluid path being narrower than a narrowest dimension of either of said apertures in said first or second apertures in said second intermediate substrate; and
a fluid contained within said thermal ground plane for transporting thermal energy from a region of the said thermal ground plane to another region of the said thermal ground plane, wherein said fluid is driven by capillary forces in at least two directions along said channels between cross members of each said intermediate substrate.