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

Claim 5:
6. A thermal ground plane comprising:
a metal substrate having a surface within a vapor chamber;
a first intermediate substrate within said vapor chamber overlying said surface of said metal substrate and having a first set of cross members in one direction and a second set of cross members in another direction, 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 adjacent cross members within said first set, and said second set of cross members defining channels between adjacent cross members 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 first apertures bounded by said cross members;
a second intermediate substrate within said vapor chamber overlying said first intermediate substrate having a first set of cross members in one direction and a second set of cross members in another direction, 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 adjacent cross members within said first set, and said second set of cross members defining channels between adjacent cross members 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 second apertures bounded by said cross members, said apertures in said second intermediate substrate are offset from said apertures in said second 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 intermediate substrates; and
a fluid contained within said thermal ground plane for transporting thermal energy from a region of the 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 said intermediate substrates.