A vapor chamber that includes a housing having a first sheet and a second sheet facing each other, wherein at least a part of an outer edge of the housing has a step shape in which an end portion of the second sheet is positioned inside an end portion of the first sheet, and the housing has a bonded portion inside the end portion of the second sheet where the first sheet and the second sheet are bonded to each other; a protective film covering a boundary between the end portion of the second sheet and the first sheet at the step shape; a working fluid enclosed in the housing, and a wick on an inner wall surface of the first sheet or the second sheet.

Methods and apparatus for a cooling plate for solid state power amplifiers are provided herein. In some embodiments, a cooling plate of a solid state power amplifier includes a body having a rectangular shape, a first sidewall opposite a second sidewall, and a third sidewall opposite a fourth sidewall; a plurality of holes disposed on a first side of the body configured to mount a plurality of heat generating microelectronic components; and a channel having a plurality of segments disposed within the body and extending from a first port disposed on the first sidewall to a second port disposed on the first sidewall.

Methods and apparatus for a cooling plate for solid state power amplifiers are provided herein. In some embodiments, a cooling plate of a solid state power amplifier includes a body having a rectangular shape, a first sidewall opposite a second sidewall, and a third sidewall opposite a fourth sidewall; a plurality of holes disposed on a first side of the body configured to mount a plurality of heat generating microelectronic components; and a channel having a plurality of segments disposed within the body and extending from a first port disposed on the first sidewall to a second port disposed on the first sidewall.

The monolithic redundant loop cold plate core includes a core structure and a first cooling loop formed in the core structure. The first cooling loop including: a plurality of first cooling loop passageways extending across a heat exchanger core in one or more passes. The one or more passes include at least a first pass. The monolithic redundant loop cold plate core includes a second cooling loop formed in the core structure. The second cooling loop includes: a plurality of second cooling loop passageways extending across the heat exchanger core in the one or more passes. The plurality of first cooling loop passageways are intermixed in an alternating side-by-side arrangement with the plurality of second cooling loop passageways in a single cooling plane. The monolithic redundant loop cold plate core is a single piece including a unitary structure.

A monolithic redundant loop cold plate core includes a core structure and a first cooling loop formed in the core structure. The first cooling loop including one or more first cooling loop passageways extending across a heat exchanger core in one or more passes. The one or more passes include at least a first pass. The monolithic redundant loop cold plate core includes a second cooling loop formed in the core structure. The second cooling loop including one or more second cooling loop passageways extending across the heat exchanger core in the one or more passes. The one or more first cooling loop passageways are intermixed in an alternating side-by-side arrangement with the one or more second cooling loop passageways in a single cooling plane. The monolithic redundant loop cold plate core is a single piece including a unitary structure.

A cold plate apparatus that has an outlet plenum leading to an outlet opening includes an outlet transition that connects the outlet opening to the outlet plenum. The outlet transition defines a smoothly curving flow path from a direction along a long dimension of the outlet plenum, which is parallel to a plane defined by the outlet opening, to a direction along a centerline of the outlet opening, which is at an angle from the plane defined by the outlet opening. The outlet transition provides a smooth variation of cross-sectional area from the outlet plenum to the outlet opening.

A cold plate apparatus that has an outlet plenum leading to an outlet opening includes an outlet transition that connects the outlet opening to the outlet plenum. The outlet transition defines a smoothly curving flow path from a direction along a long dimension of the outlet plenum, which is parallel to a plane defined by the outlet opening, to a direction along a centerline of the outlet opening, which is at an angle from the plane defined by the outlet opening. The outlet transition provides a smooth variation of cross-sectional area from the outlet plenum to the outlet opening.

A temperature control body housing includes a monolithic housing middle portion penetrated by one or more than one fluid canal, each fluid canal being completely bounded on four sides by respective walls monolithically connected to outer walls of the housing middle portion; a first housing end cap and a second housing end cap between which the housing middle portion is disposed; wherein the first housing end cap has a first fluid port and either the first housing end cap or the second housing end cap has a second fluid port, and wherein the first fluid port and the second fluid port are fluidly connected to each other by means of the one or more fluid channels.

A temperature control body housing includes a monolithic housing middle portion penetrated by one or more than one fluid canal, each fluid canal being completely bounded on four sides by respective walls monolithically connected to outer walls of the housing middle portion; a first housing end cap and a second housing end cap between which the housing middle portion is disposed; wherein the first housing end cap has a first fluid port and either the first housing end cap or the second housing end cap has a second fluid port, and wherein the first fluid port and the second fluid port are fluidly connected to each other by means of the one or more fluid channels.

A three-dimensional heat transfer device includes a first thermally conductive casing, a second thermally conductive casing, a first capillary structure, a second capillary structure and a heat pipe. The second thermally conductive casing has a through hole. The second thermally conductive casing is mounted on the first thermally conductive casing so as to form a liquid-tight chamber. The first capillary structure is disposed on the first thermally conductive casing. The second capillary structure is disposed on the first thermally conductive casing. Projections of the first capillary structure and the second capillary structure on the outer surface and an extension surface of the outer surface are located in an extent of the outer surface, and the second capillary structure is located closer to the second thermally conductive casing than the second capillary structure. The heat pipe is disposed through the through hole and in contact with the second capillary structure.