2119 results about "Thermal transmittance" patented technology

An apparatus for heating a substrate of a semiconductor device includes a hot plate, on which a semiconductor substrate is placed, and a heater for heating the hot plate. The hot plate is preferably a composite plate including a plurality of plates having different thermal conductivities from each other. For example, a first plate adjacent to the heater can be made of aluminum, which has a relatively high thermal conductivity. A second plate, laminated on top of the first plate, can be made of titanium or stainless steel, which both have a thermal conductivity lower than aluminum. A composite hot plate as disclosed herein is better able to maintain a constant temperature and a uniform temperature distribution in order to more uniformly heat a substrate and to reduce an amount of energy required for the heating process. In addition, the reliability and productivity of the semiconductor device manufactured by the apparatus can be improved.

It is an object of the present invention to provide a semiconductor device capable of preventing deterioration due to penetration of moisture or oxygen, for example, a light-emitting apparatus having an organic light-emitting device that is formed over a plastic substrate, and a liquid crystal display apparatus using a plastic substrate. According to the present invention, devices formed on a glass substrate or a quartz substrate (a TFT, a light-emitting device having an organic compound, a liquid crystal device, a memory device, a thin-film diode, a pin-junction silicon photoelectric converter, a silicon resistance element, or the like) are separated from the substrate, and transferred to a plastic substrate having high thermal conductivity.

A thermally-conductive, electrically insulative interface for conductively cooling a heat-generating source, such as an electronic component, having an associated thermal dissipation member such as a heat sink. The interface is provided as a cured sheet of a curable material formulated as a blend of a curable silicone binder, and a particulate alumina, i.e., aluminum oxide (Al2O3), filler. The interface is observed to exhibit a thermal conductivity of at least about 0.8 W/m-K and a wet dielectric breakdown strength of at least about 475 Vac/mil.

It is to provide a filter for an exhaust gas having a high thermal conductivity irrespective of a relatively high porosity or showing characteristics that the whole of the filter containing a high refractive index substance or pigment is easily warmed but hardly cooled while making low the thermal conductivity of the filter as a whole. This filter is provided with a catalyst coat layer formed by carrying a catalyst active component on a surface of a porous ceramic carrier, in which a porosity of the porous ceramic carrier is 40-80% and a substance or a pigment indicating a thermal conductivity as the filter of 3-60 W/mk or having a large refractive index at a thermal conductivity of 0.3-3 W/mk.

A heat spreader for transferring heat from a heat source to a heat sink using a phase change coolant, includes an array of cells, each cell having at least one microporous wick for supporting flows of the coolant in the liquid phase, via capillary action, within the spreader from proximate the heat sink to proximate the source and at least one macroporous wick for supporting flows of the coolant, in the liquid and vapor phase, within the spreader from proximate the source to proximate the heat sink.

A light conversion device and high-intensity, solid-state light source utilize wavelength conversion elements with a thermal conductivity greater than 1 watt per meter per degree Kelvin (W/m-K). Exemplary materials that have high thermal conductivity include monocrystalline solids, polycrystalline solids, substantially densified ceramic solids, amorphous solids or composite solids. The light conversion device and high-intensity, solid-state light source have at least one heat sink that is in direct thermal contact with the wavelength conversion element. The heat sink quickly dissipates heat generated within the wavelength conversion element in order to prevent the wavelength conversion element from overheating and undergoing thermal quenching of the wavelength conversion and light emission.

A vertical, monolithic, thin-film thermoelectric device is described. Thermoelectric elements of opposing conductivity types may be coupled electrically in series and thermally in parallel by associated electrodes on a single substrate, reducing the need for mechanisms to attach multiple substrates or components. Phonon transport may be separated from electron transport in a thermoelectric element. A thermoelectric element may have a thickness less than an associated thermalization length. An insulating film between an electrode having a first temperature and an electrode having a second temperature may be a low-thermal conductivity material, a low-k, or ultra-low-k dielectric. Phonon thermal conductivity between a thermoelectric element and an electrode may be reduced without a significant reduction in electron thermal conductivity, as compared to other thermoelectric devices. A phonon conduction impeding material may be included in regions coupling an electrode to an associated thermoelectric element (e.g., a liquid metal).

A method for providing for thermal conduction using an array of carbon nanotubes (CNTs). An array of vertically oriented CNTs is grown on a substrate having high thermal conductivity, and interstitial regions between adjacent CNTs in the array are partly or wholly filled with a filler material having a high thermal conductivity so that at least one end of each CNT is exposed. The exposed end of each CNT is pressed against a surface of an object from which heat is to be removed. The CNT-filler composite adjacent to the substrate provides improved mechanical strength to anchor CNTs in place and also serves as a heat spreader to improve diffusion of heat flux from the smaller volume (CNTs) to a larger heat sink.

A diamond composite heat spreader having a low thermal mismatch stress can improve reliability and cost of diamond-based heat spreaders. A diamond composite heat spreader can have a thermally conductive base and a diamond film in thermal contact with the thermally conductive base. The diamond film and the thermally conductive base can have a residual thermal mismatch stress which is less than about 75% of a residual thermal mismatch stress which would result from forming the diamond film on the thermally conductive base using a high temperature deposition process at 700° C. The diamond film can be formed on the thermally conductive base using a low temperature vapor deposition process performed at a temperature from about 10° C to less than 700° C, and typically lower than about 450° C. The diamond films further have high thermal diffusivity and thermal conductivity which allow for dramatic improvements in heat transfer away from a heat source without the need for growing a thick diamond film. By providing a low temperature deposition of the diamond film, residual thermal mismatch stress can be significantly reduced, while allowing for use of well known heat spreaders such as standard copper heat spreaders and associated technologies.

A Peltier or Seebeck element has first and second conductive members having different Seebeck coefficients. To decrease the heat conduction from one to the other end of each of the conductive members, the cross-section area at the intermediate part in the length direction is smaller than those at both ends parts. In place of the decrease of the cross-section, the shape of the cross-section of the intermediate part of each of the conductive members may be changed by dividing the intermediate part into pieces, or amorphous silicon or the like having a heat conductivity lower than those of the materials of both end parts may be used for the material of the intermediate part. In such a way, a high-performance Peltier/Seebeck element such that the difference between the temperature of the heated portion of the Peltier/Seebeck element and the opposite portion can be kept to a predetermined temperature difference for a long time and its manufacturing method are provided.

The invention discloses fluororesin radiating paint and a preparation method thereof. The paint mainly comprises an electron transfer type organic compound, graphene, a carbon nanotube, titanium white, other additives and fluororesin, wherein the fluororesin is a paint brand having the highest comprehensive property at present; the electron transfer type organic compound can greatly enhance the thermal radiation rate of the paint; the graphene and the carbon nanotube can further accelerate thermal conduction; and the electron transfer type organic compound, the carbon nanotube and the graphene finally form a full three-dimensional network distribution of granules (electron transfer type organic compound), wires (carbon nanotube) and planes (graphene) in a fluid. The fluororesin radiating paint disclosed by the invention has high thermal radiation rate, high thermal conductivity and low thermal resistance, can realize radiation cooling, and simultaneously has the effects of self cleaning, acid/alkali resistance and super high insulativity, thereby having high practical value.

A light emitting module with improved optical functionality and reduced thermal resistance is described, which comprises a light emitting device (LED), a wavelength converting (WC) element and an inorganic optically-transmissive thermally-conductive (OTTC) element. The WC element is capable of absorbing light generated from the LED at a specific wavelength and re-emitting light having a different wavelength. The re-emitted light and any unabsorbed light exits through at least one surface of the module. The OTTC is in physical contact with the WC element and at least partially located in the optical path of the light. The OTTC comprises one or more layers of inorganic material having a thermal conductivity greater than that of the WC element. As such, a compact unitary integrated module is provided with excellent thermal characteristics, which may be further enhanced when the OTTC provides a thermal barrier for vertical heat propagation through the module but not lateral propagation.

It is an object of the present invention to provide a high thermal conductive element that has improved thermal conductivity in the layer direction while retaining the high thermal conductivity characteristics in the planar direction possessed by graphite. The present invention is a high thermal conductive element in which carbon particles are dispersed in a graphite-based matrix, wherein (1) the c axis of the graphene layers constituting the graphite are substantially parallel, (2) the thermal conductivity κ∥ in a direction perpendicular to the c axis is at least 400 W/m·k and no more than 1000 W/m·k, and (3) the thermal conductivity κ⊥ in a direction parallel to the c axis is at least 10 W/m·k and no more than 100 W/m·k.

Phononic crystals that have the ability to modify and control the thermal black body phonon distribution and the phonon component of heat transport in a solid. In particular, the thermal conductivity and heat capacity can be modified by altering the phonon density of states in a phononic crystal. The present invention is directed to phononic crystal devices and materials such as radio frequency (RF) tags powered from ambient heat, dielectrics with extremely low thermal conductivity, thermoelectric materials with a higher ratio of electrical-to-thermal conductivity, materials with phononically engineered heat capacity, phononic crystal waveguides that enable accelerated cooling, and a variety of low temperature application devices.

Body temperature measurements are obtained by scanning a thermal radiation sensor across the side of the forehead over the temporal artery. A peak temperature measurement is processed to compute an internal temperature of the body as a function of ambient temperature and the sensed surface temperature. The function includes a weighted difference of surface temperature and ambient temperature, the weighting being varied with target temperature through a minimum in the range of 96° F. and 100° F. The radiation sensor views the target surface through an emissivity compensating cup which is spaced from the skin by a circular lip of low thermal conductivity.

In one embodiment the present invention provides for a high thermal conductivity resin that comprises a host resin matrix 32 and a high thermal conductivity filler 30. The high thermal conductivity filler forms a continuous organic-inorganic composite with the host resin matrix, and the high thermal conductivity fillers are from 1-1000 nm in length and have an aspect ratio of between 3-100.

This invention relates to solar panels with improved encapsulants and backsheets for greater power output and/or increased efficiency by using materials with higher thermal conductivity than conventional solar panels. According to certain embodiments the improved materials include fillers while maintaining sufficient dielectric properties. According to certain other embodiments, the invention includes a solar panel with the improved encapsulant between solar cells and the improved backsheet. The invention also includes a method of making a solar panel including the improved materials.

A battery having at least one group of electric power-generating elements each comprising at least a positive electrode, a negative electrode and a separator; and a battery case containing the group of electric power-generating elements. The battery case is formed from a mixture which includes a matrix material selected from the group consisting of plastics, polymers, resins or combinations thereof. The mixture further includes a thermally conductive, electrically insulating material distributed throughout the matrix material. The thermally conductive material has a thermal conductivity at least one order of magnitude higher than the thermal conductivity of the matrix material. The present invention also includes battery cases (lids and containers) used in making the batteries and formed of the mixture.