Abstract: Method of manufacture, comprising forming a heat-transfer structure. Forming the heat-transfer structure includes forming a metallic planar substrate having a front surface and a back surface, the back surface being opposite the front surface. Forming the heat-transfer structure also includes forming an array of metallic raised features located directly on each of the front and back surfaces. Respective portions of the raised features are configured to be mechanically bend or buckle plastically deformable via a compressive force applied between a first substrate and a second substrate.

Abstract: An apparatus comprising a first substrate having a first surface, a second substrate having a second surface facing the first surface and an array of metallic raised features being in contact with the first surface to the second surface, a portion of the raised features having a mechanical bend or buckle plastic deformation produced therein via a compressive force. One or more of the metallic raised features has one or more surface singularities therein prior to the mechanical bend or the buckle plastic deformation produced by the compressive force.

Abstract: A circuit structure comprises a circuit board. An array of opto-electronic devices is provided on the circuit board. At least some of heat sinks are provided in thermal contact with a respective opto-electronic device. A face plate of the circuit structure comprises an array of openings configured to allow air to move along a path adjacent to an opto-electronic device and through a respective heat sink. An air moving device is located adjacent a heat sink and is operable to drive air through a respective opening on the face plate. A ducting structure is provided to direct the air driven by a corresponding air moving device.

Abstract: An apparatus 100 comprising a first substrate 130 having a first surface 125, a second substrate 132 having a second surface 127 facing the first surface and an array 170 of metallic raised features 170 being located on the first surface, each raised feature being in contact with the first surface to the second surface, a portion of the raised features being deformed via a compressive force 305.

Abstract: An apparatus comprising a first substrate having a first surface, a second substrate having a second surface facing the first surface and an array of metallic raised features being in contact with the first surface to the second surface, a portion of the raised features having a mechanical bend or buckle plastic deformation produced therein via a compressive force. One or more of the metallic raised features has one or more surface singularities therein prior to the mechanical bend or the buckle plastic deformation produced by the compressive force.

Abstract: A method and an apparatus are provided for cooling a heat source using a refrigerant flow in a heat exchanger. According to some embodiments, a flow property of the refrigerant as it flows through a heat exchanger is measured and based on the measurement a flow distribution rate for the flow of the refrigerant in the heat exchanger is determined. A valve is operated for adjusting the flow rate of the refrigerant in the heat exchanger according to the determined flow distribution rate.

Abstract: A heat sink comprising a base, a first row of metal fins and a second row of wedge-shaped vortex generators. The first row of metal fins can be connected to and raised above a surface of the base, long dimensions of the metal fins being substantially parallel to each other and to the surface. The second row of wedge-shaped vortex generators can be connected to and raised above the base, each of the wedge-shaped vortex generators having a long dimension that is substantially parallel to the long dimensions of others of the wedge-shaped vortex generators and to the surface. The first and second rows can be substantially opposed to each other such that first ends of the metal fins are staggered with respect to first ends of the wedge-shaped vortex generators.

Abstract: A method of manufacture comprising forming a plurality of cells on a substrate, wherein each of the cells has at least one dimension that is less than about 1 millimeter and is configured to hold a medium therein, and wherein each of the cells has walls that laterally enclose an area of a surface of the substrate and has a top opening. The method also comprises contacting the cells with a fluid and introducing a surfactant and a medium into the fluid to thereby form a foam layer contacting the walls of cells. Bubbles of the foam layer have fluid walls that include the surfactant, the bubbles are filled with the medium, and the bubbles remain substantially stationary on the top openings of the cells for a period on average of at least about 1 minute.

Abstract: An apparatus includes a heat sink with a complex 3D structure. The heat sink includes a stack of metal layers. The metal layers are mechanically connected together and being separated by physical interface regions. The stack has array of channels for carrying fluid through the stack. Each channel of the array has a lateral surface formed by portions of more than one of the metal layers.

Abstract: An apparatus, comprising a plurality of closed cells disposed on a surface of a substrate. Each of the closed cells has at least one dimension that is less than about 1 millimeter and are configured to hold a medium therein. The apparatus also comprises a foam that contacts the closed cells. The foam has fluid walls that include a surfactant, and bubbles of the foam layer are filled with the medium.

Abstract: A method of controlling the flow resistance of a fluid disposed on a surface of a substrate. The method comprises contacting a fluid with a plurality of cells on a substrate and adjusting amounts of a surfactant and a medium in the fluid to thereby form a foam layer contacting the walls of the cells. Each of the cells has at least one dimension that is less than about 1 millimeter and is configured to hold the medium therein. Each of the cells has walls that laterally enclose an area of a surface of the substrate and has a top opening. Bubbles of the foam layer have fluid walls that include a surfactant, are filled with the medium, and remain substantially stationary on the top openings of the cells for a period on average of at least about 1 minute.

Abstract: Heat sink comprising a base and a plurality of heat exchange elements. The elements are connected to and raised above, a surface of the base. There is a first row of the elements, with each of the elements having a long dimension that is substantially parallel to the long dimension of the other elements of the first row and to the surface. There is a second row of the elements, each of the elements having a long dimension that is substantially parallel to the long dimension of the other elements of the second row and to the surface. The first row and the second row are substantially opposed to each other such that one set of ends of the elements of the first row are staggered with respect to one set of ends of the elements of the second row.

Abstract: An apparatus comprising a heat sink and a plenum. The heat sink includes a base and a plurality of heat exchange elements, connected to and raised above, a surface of the base. The plenum is located above the heat exchange elements. The plenum includes a housing configured to hold a positive air-pressure therein, and openings in a surface of the housing. The opening are positioned such that air exiting the plenum through the openings is directed to the heat sink.

Abstract: Device including channel having channel input and output. Channel has interior channel surface extending along channel path from channel input to output. In one implementation, channel includes plurality of channel sections in serial communication along channel path. Each of channel sections includes first internal circumference spaced apart along channel path from second internal circumference, in each of channel sections the first and second internal circumferences being substantially different. Each of channel sections includes sub-surface of interior channel surface. At least region of sub-surface of each channel section includes distribution of raised micro-scale features. As another implementation, at least first region of interior channel surface includes distribution of raised micro-scale features interrupted by plurality of raised barriers spaced apart along channel path on interior channel surface.

Abstract: An apparatus 100 comprising a radiofrequency filter body housing 102. The radiofrequency filter body housing includes a polymeric composition 110 that includes at least one polymer foam 115 and filler material 120. The filler material is uniformly distributed and randomly oriented throughout the polymeric composition. The radiofrequency filter body housing also includes an electrically conductive material 125 coating the polymeric composition.

Abstract: Device having first wick evaporator including first membrane and plurality of first thermally-conductive supports. First membrane has upper and lower surfaces. First membrane also has plurality of pores with upper pore ends at upper surface of first membrane and with lower pore ends at lower surface of first membrane. Each of first thermally-conductive supports has upper and lower support ends. Upper support ends of first thermally-conductive supports are in contact with first membrane. Each of first thermally-conductive supports has longitudinal axis extending between the upper and lower support ends, average cross-sectional area along axis, and membrane support cross-sectional area at upper support end, the membrane support cross-sectional area effectively being smaller than average cross-sectional area. First thermally-conductive supports are configured to conduct thermal energy from lower support ends of first thermally-conductive supports to first membrane.

Abstract: An apparatus, comprising a plurality of closed cells disposed on a surface of a substrate. Each of the closed cells has at least one dimension that is less than about 1 millimeter and are configured to hold a medium therein. The apparatus also comprises a foam that contacts the closed cells. The foam has fluid walls that include a surfactant, and bubbles of the foam layer are filled with the medium.

Abstract: An apparatus, comprising a plurality of closed cells disposed on a surface of a substrate. Each of the closed cells has at least one dimension that is less than about 1 millimeter and are configured to hold a medium therein. The apparatus also comprises a foam that contacts the closed cells. The foam has fluid walls that include a surfactant, and bubbles of the foam layer are filled with the medium.

Abstract: An apparatus 100 comprising a first substrate 130 having a first surface 125, a second substrate 132 having a second surface 127 facing the first surface and an array 170 of metallic raised features 170 being located on the first surface, each raised feature being in contact with the first surface to the second surface, a portion of the raised features being deformed via a compressive force 305.

Abstract: An apparatus 100 comprising a radiofrequency filter body housing 102. The radiofrequency filter body housing includes a polymeric composition 110 that includes at least one polymer foam 115 and filler material 120. The filler material is uniformly distributed and randomly oriented throughout the polymeric composition. The radiofrequency filter body housing also includes an electrically conductive material 125 coating the polymeric composition.