Abstract: Embodiments of the invention provide a magnetic disk drive and magnetic disk drive control method for unloading a head safely with a simple configuration when a positioning control signal cannot be detected due, for instance, to a seek error. In one embodiment, when a head cannot detect servo information prerecorded on a disk, a positioning control section resets and starts a time counting section, and switches to an unloading control section for causing the unloading control section to output a position control signal to a VCM driver. The time counting section counts tacho-pulses generated by a motor driver, and outputs time information. The unloading control section receives the time information from the time counting section. In accordance with the received time information, the unloading control section computes the position control signal that the positioning control section outputs to the VCM driver.

Abstract: A cooling module designed so that the following components are stacked above a CPU: a cooling jacket allowing a cooling liquid to absorb heat generated by the CPU, a pump causing the cooling liquid to circulate, a reserve tank used to provide a supplementary cooling liquid and to bleed air from the cooling liquid, and a first radiator that cools the cooling liquid, the cooling module being also designed so that a second radiator is located at a side of the first radiator to cool the cooling liquid, wherein the cooling liquid is driven by the pump so as to circulate from the cooling jacket, which absorbs heat generated by the CPU, through the radiators to the reserve tank.

Abstract: Embodiments of the invention provide a magnetic disk drive and magnetic disk drive control method for unloading a head safely with a simple configuration when a positioning control signal cannot be detected due, for instance, to a seek error. In one embodiment, when a head cannot detect servo information prerecorded on a disk, a positioning control section resets and starts a time counting section, and switches to an unloading control section for causing the unloading control section to output a position control signal to a VCM driver. The time counting section counts tacho-pulses generated by a motor driver, and outputs time information. The unloading control section receives the time information from the time counting section. In accordance with the received time information, the unloading control section computes the position control signal that the positioning control section outputs to the VCM driver.

Abstract: An electronic module which is detachably mounted on electronic equipment. The electronic module includes a board having a heat generator mounted on a surface thereof, and a cooling jacket which is integrally attached to the electronic module. The cooling jacket is thermally coupled to the heat generator and has a passage of a cooling fluid therewithin.

Abstract: A liquid cooling jacket and a system for use in an electronic apparatus, preferable in the cooling capacity or performance, with less in man-hour and manufacturing costs in need of process thereof, and applicable into a narrow space, wherein a plural number of lamination plates, each being formed through the punching process, are piled up in the width direction thereof, for each piece thereof, and are bonded with each other. A cooling liquid flows in a flow passage defined between the laminating plates, and the laminating plates themselves function as a cooling fin.

Abstract: A liquid cooling system, enabling protection from corrosion due to liquid coolant for a long time-period (5-10 years) while cooling a heat-generation body effectively, comprises a pump 108, a heat-receiving jacket 107, a radiator for radiating heat into an outside, being made up with a heat-radiation pipe 201 and a heat-radiation plate 202, and further a tank 203 for accumulating the liquid coolant 209 within an inside thereof, wherein those are connected in a closed-loop, so as to circulating the cooling liquid therein, thereby cooling the heat-generation of a CPU 106, being a heat-generation element, effectively, through the heat-receiving jacket 107, and further a water-permeable bag 204 is disposed in a portion of flow path of the cooling liquid, which receives microcapsules 10 therein, each enclosing in an inside thereof anti-corrosion agent 20 for suppressing the corrosion due to the cooling liquid, including such as, a water, etc.

Abstract: In a disk drive, since high-frequency repeatable runout (RRO) components own low correlative relationships between adjoining tracks, a servo control system of a magnetic head is followed to the high-frequency RRO components, and thus, in the worst case, there is a possibility that data which have been previously recorded on these tracks are destroyed. To avoid this problem, both a tracking type repetitive control unit which is followed to low-frequency RRO components, and a rejection type repetitive control unit which cancels the high-frequency RRO components are provided in a following control loop in order that the following control system is not unnecessarily followed to the high-frequency RRO.

Abstract: In a disk drive system, a data transducer control during a seek operation is based on the distance to be traversed. Acceleration of a motor coupled to the head initiates movement of the head. Deceleration of the motor is initiated based on the distance traversed by the head.

Abstract: An electronic apparatus includes a case mounting a semiconductor element therein, a heat-receiving member thermally connected with the semiconductor element, a heat-radiation member disposed on an inner side surface of the case, and a liquid driver which drives a liquid coolant between the heat-radiation member and the heat-receiving member. The apparatus further includes a tank accumulating the liquid coolant therein and having at least a predetermined volume of the coolant to delimit a coolant surface within the tank. The tank, the heat-radiation member and the heat-receiving member are connected with tubes, and a suction end portion of a suction pipe connected into the tank is located at a position which is always below the coolant surface irrespective of change of position of the tank.

Abstract: In a liquid cooling system, comprising: a heat-receiving jacket for receiving heat from a heat-generation body therein; a heat-radiator for radiating the heat therefrom, which is received within the heat-receiving jacket; and a tank for accumulating refrigerant therein, which is connected with the heat-receiving jacket and the heat-radiator through flow passages, thereby enclosing a refrigerant within the heat-receiving jacket, the heat-radiator and the tank, including the flow passages provided therebetween, and further comprising: a liquid transfer means for generating a circulation flow of the refrigerant enclosed therein, wherein the tank 14 is built up on one side surface of a substrate 15 having superior heat-conductivity and heat-resistance, defined between a flexible film or sheet 16 or 23 having superior heat-conductivity and heat-resistance, and the heat-radiator having a heat-radiation flow passage 9 on the other side surface thereof, defined between the flexible film or sheet 16 or 23 having super

Abstract: A liquid cooling jacket and a system for use in an electronic apparatus, preferable in the cooling capacity or performance, with less in man-hour and manufacturing costs in need of process thereof, and applicable into a narrow space, wherein a plural number of lamination plates, each being formed through the punching process, are piled up in the width direction thereof, for each piece thereof, and are bonded with each other. A cooling liquid flows in a flow passage defined between the laminating plates, and the laminating plates themselves function as a cooling fin.

Abstract: An electronic apparatus includes a case mounting a semiconductor element within an inside thereof, a heat-receiving member thermally connected with the semiconductor element, a heat-radiation member disposed on an inner side surface of the casing, and a liquid driver for driving a liquid coolant between the heat-radiation member and the heat-receiving member. The apparatus further includes a tank accumulating the liquid coolant therein with at least a predetermined volume of the coolant to delimit a coolant surface within the tank, wherein the tank, the heat-radiation member and the heat-receiving member are connected with tubes, and a suction end portion of a suction pipe connected into the tank is located at a position which is always below the coolant surface irrespective of change of position of the tank.

Abstract: In a liquid cooling system of low costs and being installable with high density into a server having a several kinds of predetermined heights of housings, each of devices building up the liquid cooling system is set to be within about 44 mm, being the standard height of a lack when installing into a cabinet for the server lack of lack-mount method, in particular, about from 40 mm to 36 mm, and this is combined with, thereby building up a liquid cooling system of low costs and enabling high density installation, for an electronic apparatus of lack-mount method having different heights.

Abstract: A cooling module designed so that the following components are stacked above a CPU: a cooling jacket allowing a cooling liquid to absorb heat generated by the CPU, a pump causing the cooling liquid to circulate, a reserve tank used to provide a supplementary cooling liquid and to bleed air from the cooling liquid, and a first radiator that cools the cooling liquid, the cooling module being also designed so that a second radiator is located at a side of the first radiator to cool the cooling liquid, wherein the cooling liquid is driven by the pump so as to circulate from the cooling jacket, which absorbs heat generated by the CPU, through the radiators to the reserve tank.

Abstract: A liquid cooling system for use in an electronic apparatus, being super small-sized and thin in the shape and being suitable for cooling a heat-generation part, such as, a semiconductor element having large amount of heat generation, for example, with maintaining the corrosion resistance thereof for a long time period, comprises: a pump for supplying a cooling liquid; a heat-receiving jacket, being supplied with the cooling liquid, for receiving heat from an electronic parts; a radiator, being supplied with the cooling liquid passing through the heat-receiving jacket, for radiation heat; and flow passages for circulating the cooling liquid in a route passing through the radiator back to said pump, wherein an ion exchange bag, having an ion exchange resin and a bag enclosing it therein, is disposed in a part of the constituent parts of the liquid cooling system, and/or the ion exchange bag is exchangeable.

Abstract: An electronic module which is detachably mounted on electronic equipment. The electronic module includes a board having a heat generator mounted on a surface thereof, and a cooling jacket which is integrally attached to the electronic module. The cooling jacket is thermally coupled to the heat generator and has a passage of a cooling fluid therewithin.

Abstract: An imaging device for a microscope comprises an electronic camera which images an observation image captured by the microscope, a display which displays an observation image imaged by the electronic camera and photograph information of the observation image, and a display setting portion which controls the display to set display of the photograph information.

Abstract: An electronic apparatus includes a case mounting a semiconductor element within an inside thereof, a heat-receiving member thermally connected with the semiconductor element, a heat-radiation member disposed on an inner side surface of the casing, and a liquid driver for driving a liquid coolant between the heat-radiation member and the heat-receiving member. The apparatus further includes a tank accumulating the liquid coolant therein with at least a predetermined volume of the coolant to delimit a coolant surface within the tank, wherein the tank, the heat-radiation member and the heat-receiving member are connected with tubes, and a suction end portion of a suction pipe connected into the tank is located at a position which is always below the coolant surface irrespective of change of position of the tank.

Abstract: A rack-mount server system of a liquid cooling system, in which a heat-generating component such as a CPU is cooled by a coolant has a plurality of server modules with heat-generating components which are cooled by the circulating coolant. The server modules are connected in parallel to a circulation coolant path through which the coolant to cool the server modules is circulated. In the middle of the coolant circulation path is a cooling unit that cools the coolant by radiating its heat to the outside air. Furthermore, a bypass route parallel to the server modules and going around the server modules is provided in the coolant circulation path, and the circulation quantity of the coolant is controlled in the bypass route. Alternatively, the flow quantity of the coolant is controlled in each of the server modules.

Abstract: A plurality of electronic apparatuses, each apparatus having a closed loop cooling system, are installed in a cabinet having another closed loop fluid cooling system. Each of the closed loop fluid cooling systems includes a heat receiver and a pump. A projection is mounted on the electronic apparatus and a switching valve is arranged on the cabinet to stop or start circulation of a cooling fluid.