68results about How to "Temperature variation" patented technology

An exposure system includes a liquid supply section for supplying an immersion liquid onto a resist film formed on a substrate; and an exposure section for irradiating the resist film with exposing light through a mask with the immersion liquid provided on the resist film. The liquid supply section includes an immersion liquid tank for circulating the immersion liquid during exposure.

A disk array system includes a plurality of disk drives and at least one unit box including the plurality of disk drives aligned in the thickness direction of the disk drive, each disk drive including a thin case accommodating a recording disk, a read/write head, and a driving mechanism for driving the recording disk and the read/write head, and a control board for controlling the driving mechanism, the control board being mounted on the thin case. In the disk array system, the thin case and the unit box are composed of a thermally-conductive material, the unit box includes surfaces parallel to the thickness direction of the plurality of disk drives, and at least one of the surfaces has a cold plate filled with a refrigerant. Heat generated at the disk drives is transferred to the cold plate, thereby improving cooling performance.

A radio transmitter includes a power control table, a power amplifier, and a power controller. The power control table includes a plurality of control values. The power amplifier amplifies an RF signal for transmission with an adjustable gain. The power controller adjusts the gain of the power amplifier based on the power control table and a temperature signal that is indicative of a temperature of at least a portion of the radio transmitter.

To reduce the width of variations in temperature of circulating liquid due to a variation in a heat load of an external device to a low level to stabilize the performance of the external device in a constant temperature liquid circulating device. In a constant temperature liquid circulating device that connects a piping of circulating liquid in an external device between a discharge port and a return port of a conduit for delivering the circulating liquid at a constant temperature by a pump, a flow amount sensor and temperature sensors for detecting discharge temperature (T₁) of the circulating liquid from the conduit and the return temperature (T₂) of the circulating liquid are provided in the conduit, so that the flow amount and the temperature of the circulating liquid is controlled by a controller according to the heat load of the external device obtained on the basis of the outputs from the temperature sensors. The control is such that when the difference between the discharge temperature and the return temperature is smaller than the preset value, the temperature of the circulating liquid is controlled corresponding to the heat load, and when the temperature difference is larger than the preset value, the temperature of the circulating liquid is controlled corresponding to the heat load by increasing the flow amount of the circulating liquid to the piping of the external device in addition to the temperature control described above.

An engine that has, in axial flow series, booster compressor, core compressor, combustion equipment, core turbine, and low-pressure turbine. Core turbine drives core compressor via an interconnecting high-pressure shaft. Low-pressure turbine drives booster compressor via an interconnecting low-pressure shaft. Low-pressure turbine also drives external load having a defined speed characteristic that dictates speed of the low-pressure turbine and booster compressor. Booster compressor has one or more rows of variable stator vanes. The method includes: scheduling variation in the angle of variable stator vanes as a function of speed of the booster compressor wherein the vanes open as booster compressor speed increases; measuring or setting one or more operational parameters which are determinative of temperature at entry to core turbine; and biasing scheduling of angle variation of variable stator vanes as a function of operational parameter(s) to reduce variation in temperature at entry to core turbine.

To prevent, in a multilayer wiring board to which a semiconductor chip is flip-chip bonded, occurrence of cracks in the board at portions adjacent to electrode pads due to a difference in thermal expansion coefficient between the semiconductor chip and the board. A multilayer wiring board (20) of the present invention has features that electrode pads (22) corresponding to electrodes of a semiconductor chip (25) located near an outer periphery (29) of the semiconductor chip each have an oblong shape, openings (35) of a solder resist (23) are each smaller than the oblong shape, and the center (B) of the opening is located to be offset from the center (A) of the oblong shape by a distance (L4) in a direction (30) toward the center of the semiconductor chip. Therefore, in the multilayer wiring board of the present invention, thermal stresses applied to portions (L3) of the electrode pads (22) on the board near the outer periphery of the semiconductor chip are relaxed. Consequently, the multilayer wiring board of the present invention can prevent occurrence of cracks in the board at portions adjacent to the electrode pads near the outer periphery of the semiconductor chip due to a difference in thermal expansion coefficient between the semiconductor chip and the board.

A field effect device is disclosed that provides a reduced variation in on-resistance as a function of junction temperature. The field effect device, having a source junction, gate junction and drain junction, includes a resistive thin film adjacent the drain junction wherein the resistive thin film comprises a material having a negative temperature coefficient of resistance. The material is selected from one or more materials from the group consisting of doped polysilicon, amorphous silicon, silicon-chromium and silicon-nickel, where the material properties, such as thickness and doping level, are chosen to create a desired resistance and temperature profile for the field effect device. Temperature variation of on-resistance for the disclosed field effect device is reduced from the temperature variation for a similar field effect device without the resistive thin film.

Provided is a light-bulb type LED lamp 10 including a plurality of LEDs 67-78, a base 12, a lighting circuit unit that converts commercial power provided through the base 12 into power for lighting the LEDs 67-78, and a heat radiation member 16 that includes a bowl-shaped portion 42. Two stages 46 and 48, extending inwards from an inner circumferential surface 44 of the bowl-shaped portion 42, are provided in a direction of a central axis X of the bowl-shaped portion 42. The LEDs 67-78 are mounted on the stages 46 and 48 in a circumferential direction around the central axis X.

A method of mixing a rubber composition includes a carbon introduction step and a uniform dispersion step. In the carbon introduction step, on the basis of a deviation between a rate of temperature increase of the rubber mixture (R) and a target value, at least one of a ram pressure (Pr) and a rotational speed (N) of the mixing rotor (2) is PID controlled so that the ultimate temperature of the rubber mixture (R) at the conclusion of the step is within a tolerance range. In the uniform dispersion step, the ram pressure (Pr) or the rotational speed (N) of the mixing rotor (2) is adjusted to reduce a deviation between a value based on successively detected data associated with a predetermined control target and a target value.

A concentrated cooling apparatus of a refrigerator is capable of improving the reliability of an infrared sensor by preventing moisture from being condensed onto the surface of the infrared sensor. The concentrated cooling apparatus includes a nozzle rotationally supported by a cold air guide path, the nozzle intensively jetting cold air to a high-temperature load region when a high-temperature load is placed inside a chilling chamber of the refrigerator. An infrared sensor is installed at the front of the nozzle, and the infrared sensor senses the high-temperature load region while being rotated together with the nozzle. A moisture removing device is formed at a side of the nozzle, the moisture removing device jetting cold air on the surface of the infrared sensor to remove moisture condensed on the surface of the infrared sensor.

A movable platen support structure includes: a linear guide mechanism via which a movable platen is provided for horizontal movement; a plurality of movable-platen height adjustment mechanisms provided in corresponding relation to leg sections of the platen, each of the height adjustment mechanisms including a flat plate placed on a corresponding slider of the guide mechanism, and an adjusting bolt screwed into the corresponding leg section of the slider and abutting at its distal end against the flat plate; and a plurality of fastening mechanisms provided in corresponding relation to the leg sections, each of the fastening mechanisms including a fastening bolt for, following the height adjustment by the adjusting bolts, fastening the corresponding leg section to the corresponding slider by being passed through the leg section and the flat plate so as to be screwed into the slider.