Abstract: A memory includes: a magnet including a first and second portions adjacent in a first direction. The first portion has a first dimension in a second direction at a first position at which a dimension of the magnet in the second direction is maximum, the second direction perpendicular to the first direction, the second portion has a second dimension in the second direction at a second position at which a dimension of the magnet in the second direction is minimum, the second dimension smaller than the first dimension, the first portion is continuous to the second portion via a third position between the first and second positions, a curve corresponding to an outer of the magnet extends between the first and third positions, and the curve passes through a side closer to the central axis of the magnet than a straight line connecting the first and second positions.

Abstract: Provided is a self-aligning roller bearing for supporting a main shaft of a wind power generator, the self-aligning roller bearing including an inner ring, an outer ring, two rows of rollers, and retainers. Each of the rollers has an outer peripheral surface formed with a DLC coating having a multilayer structure. The DLC coating has a film thickness of 2.0 ?m or larger. A base material of each of the rollers has an external surface having a surface roughness of Ra?0.3 and R?q?0.05. The DLC coating having the multilayer structure includes layers having stepwisely increasing film hardnesses such that a layer situated closer to outside has a higher hardness.

Abstract: To provide a rolling bearing having a hard film on an inner ring raceway surface and an outer ring raceway surface of the rolling bearing that improves peeling resistance of the hard film, shows the original property of the hard film, and suppresses the attackability to a mating material. A rolling bearing 1 has an inner ring 2 having an inner ring raceway surface 2a on an outer circumference, an outer ring 3 having an outer ring raceway surface 3a on an inner circumference, and rolling elements 4 that roll between the inner ring raceway surface 2a and the outer ring raceway surface 3a. A hard film 8 includes a foundation layer formed directly on the inner ring raceway surface 2a or the outer ring raceway surface 3a and mainly formed of Cr and WC, a mixed layer having a gradient composition formed on the foundation layer and mainly formed of WC and DLC, and a surface layer formed on the mixed layer and mainly formed of DLC.

Abstract: Provided is a double-row self-aligning roller bearing including: an inner ring; an outer ring having a spherical raceway surface; and rollers arranged in two rows and interposed between the inner ring and the outer ring, wherein a ratio of a contact angle ?1 in one row to a contact angle ?2 in the other row falls within a range of 0.25??1/?2?0.5, and a ratio of distance B1 in a bearing width direction from an end face of the bearing on a side of the one of the rows to an intersection of two lines of action defining the contact angles of the two rows, relative to a distance B2 in the bearing width direction from an end face of the bearing on a side of the other of the rows to the intersection falls within a range of 0.5?B1/B2?0.6.

Abstract: Provided is a self-aligning roller bearing for supporting a main shaft of a wind power generator, the self-aligning roller bearing including an inner ring, an outer ring, two rows of rollers, and retainers. Each of the rollers has an outer peripheral surface formed with a DLC coating having a multilayer structure. The DLC coating has a film thickness of 2.0 ?m or larger. A base material of each of the rollers has an external surface having a surface roughness of Ra?0.3 and R?q?0.05. The DLC coating having the multilayer structure includes layers having stepwisely increasing film hardnesses such that a layer situated closer to outside has a higher hardness.

Abstract: To provide a rolling bearing having a hard film on an inner ring raceway surface and an outer ring raceway surface of the rolling bearing that improves peeling resistance of the hard film, shows the original property of the hard film, and suppresses the attackability to a mating material. A rolling bearing 1 has an inner ring 2 having an inner ring raceway surface 2a on an outer circumference, an outer ring 3 having an outer ring raceway surface 3a on an inner circumference, and rolling elements 4 that roll between the inner ring raceway surface 2a and the outer ring raceway surface 3a. A hard film 8 includes a foundation layer formed directly on the inner ring raceway surface 2a or the outer ring raceway surface 3a and mainly formed of Cr and WC, a mixed layer having a gradient composition formed on the foundation layer and mainly formed of WC and DLC, and a surface layer formed on the mixed layer and mainly formed of DLC.

Abstract: To provide a rolling bearing superior in its seizure resistance, wear resistance, and corrosion resistance by improving peeling resistance of a DLC film and by showing the original properties of the DLC film, even when the rolling bearing is brought into contact with another member under a condition of a high load or an inferior lubrication state causing sliding or a condition in which foreign matters are mixed. A deep groove ball bearing (1) includes an inner ring (2) having an inner ring raceway surface (2a) on an outer circumference, an outer ring (3) having an outer ring raceway surface (3a) on an inner circumference, rolling elements (4) that roll between the inner ring raceway surface (2a) and the outer ring raceway surface (3a), a cage (5) that retains the rolling elements (4), and a hard film (8) formed on the inner ring raceway surface (2a) or the like. The hard film (8) is brought into rolling contact and sliding contact with other bearing component.

Abstract: To provide a double-row self-aligning roller bearing and a wind power generation rotor shaft support device having the double-row self-aligning roller bearing being capable of preventing frictional wear on a lubrication surface even when being brought into contact with another member under a condition of an inferior lubrication state causing sliding and thereby being superior in long term durability. A double-row self-aligning roller bearing 5 has a hard film 18 including a foundation layer formed directly on a sliding contact surface of at least one bearing component selected from among an inner ring 11, an outer ring 12, and rollers 13a and 13b, a mixed layer formed on the foundation layer and mainly formed of WC and DLC, and a surface layer formed on the mixed layer and mainly formed of DLC. The hard film 18 is used to be brought into sliding contact with other bearing component in a boundary lubrication state. The content of hydrogen in the mixed layer is less than 10 atom %.

Abstract: Provided is a double-row self-aligning roller bearing including: an inner ring; an outer ring having a spherical raceway surface; and rollers arranged in two rows and interposed between the inner ring and the outer ring, wherein a ratio of a contact angle ?1 in one row to a contact angle ?2 in the other row falls within a range of 0.25??1/?2?0.5, and a ratio of distance B1 in a bearing width direction from an end face of the bearing on a side of the one of the rows to an intersection of two lines of action defining the contact angles of the two rows, relative to a distance B2 in the bearing width direction from an end face of the bearing on a side of the other of the rows to the intersection falls within a range of 0.5?B1/B2?0.6.

Abstract: A rolling bearing excellent in durability is provided. A rolling bearing includes an inner ring, an outer ring, a plurality of rolling elements, and a hard film. The hard film is formed on a surface of at least one selected from the group consisting of the inner ring, the outer ring, and the rolling elements. The hard film includes an underlying layer, a mixed layer, and a surface layer. The underlying layer is directly formed on the surface and mainly composed of Cr. The mixed layer is formed on the underlying layer and mainly composed of WC and DLC. The surface layer is formed on the mixed layer and mainly composed of DLC. The mixed layer is such a layer that a content of WC therein decreases and a content of DLC therein increases continuously or stepwise from a side of the underlying layer toward the surface layer.

Abstract: The present invention provides a hard film which has high wear resistance and excellent peeling resistance and can be prevented from peeling off a base material over a long period of time and a hard film formed body on which the hard film is formed. A hard film (8) has a structure composed of a first mixed layer (8a), consisting mainly of Cr and WC, which is formed directly on a raceway surface (2a) of an inner ring (2) (base material) of a rolling bearing, a second mixed layer (8b), consisting mainly of WC and DLC, which is formed on the first mixed layer (8a), and a surface layer (8c), consisting mainly of DLC, which is formed on the second mixed layer (8b). In the first mixed layer (8a), a content rate of the Cr becomes continuously or stepwise lower and that of the DLC becomes continuously or stepwise higher from a side of the base material toward a side of the second mixed layer (8b).

Abstract: The present invention provides a film formation method capable of forming a favorable amorphous carbon film under a low vacuum by using a bipolar-type PBII apparatus and the amorphous carbon film to be produced by the film formation method. The film formation method is carried out to form the amorphous carbon film under a low vacuum (1000 to 30000 Pa) by using a power source for the bipolar-type PBII apparatus. There are provided inside a chamber (1) a power source side electrode (3) connected to a power source (6) for the PBII apparatus and a grounding side electrode (4) opposed to the power source side electrode (3). A base material (2) is disposed on one of the power source side electrode (3) and the grounding side electrode (4). Plasma of a noble gas and that of a hydrocarbon-based gas are generated between the base material (2) and the electrode where the base material (2) is not disposed to form the amorphous carbon film on a surface of the base material (2).

Abstract: The present invention provides a hard film which has high wear resistance and excellent peeling resistance and can be prevented from peeling off a base material over a long period of time and a hard film formed body on which the hard film is formed. A hard film (8) has a structure composed of a first mixed layer (8a), consisting mainly of Cr and WC, which is formed directly on a raceway surface (2a) of an inner ring (2) (base material) of a rolling bearing, a second mixed layer (8b), consisting mainly of WC and DLC, which is formed on the first mixed layer (8a), and a surface layer (8c), consisting mainly of DLC, which is formed on the second mixed layer (8b). In the first mixed layer (8a), a content rate of the Cr becomes continuously or stepwise lower and that of the DLC becomes continuously or stepwise higher from a side of the base material toward a side of the second mixed layer (8b).

Abstract: A technique that makes it possible to enhance the reliability of a module using PCB as its module substrate is provided. Solder connection of a single-chip component 43, an integrated chip component 44, and a semiconductor chip IC2 by Pb-free solder is carried out by heat treatment at a temperature below 280° C. using a heat block. Solder connection of a semiconductor chip IC1 by high-melting point solder is carried out by heat treatment at a temperature of 280° C. or higher using a hot jet. Thus, the semiconductor chip IC1 can be solder connected to PCB 38 using high-melting point solder without the following troubles: damage to the PCB 38 due to heat, for example, burning of solder resist; and peeling of prepreg from a core material. Therefore, the semiconductor chip IC1 can be mounted over the PCB 38 with high connection strength.

Abstract: A technique that makes it possible to enhance the reliability of a module using PCB as its module substrate is provided. Solder connection of a single-chip component 43, an integrated chip component 44, and a semiconductor chip IC2 by Pb-free solder is carried out by heat treatment at a temperature below 280° C. using a heat block. Solder connection of a semiconductor chip IC1 by high-melting point solder is carried out by heat treatment at a temperature of 280° C. or higher using a hot jet. Thus, the semiconductor chip IC1 can be solder connected to PCB 38 using high-melting point solder without the following troubles: damage to the PCB 38 due to heat, for example, burning of solder resist; and peeling of prepreg from a core material. Therefore, the semiconductor chip IC1 can be mounted over the PCB 38 with high connection strength.

Abstract: A method of forming narrow-pitch flip-chip bonding electrodes and wire bonding electrodes at the same time is provided so as to reduce the cost of a substrate. In addition, a low-cost solder supply method and a flip-chip bonding method to a thin Au layer are provided. A stacked layer of a Cu layer 23 and a Ni layer 24 is employed as the electrode structure, and an Au layer 25 is plated on the outer periphery thereof. In the flip-chip bonding, dissolution of Au into the solder is minimized by employing a metal jet system in the soldering to the electrodes, so that the formation of Sn—Au having a high melting point is prevented, and at the same time, the wire-bondable Au layer 25 is ensured.

Abstract: The present invention relates to a solder paste composition used for precoating an electrode surface with solder. A first solder paste composition is contains a solder powder and a flux, and a metallic powder made by metallic species different from metallic species constituting the solder powder and metallic species constituting the electrode surface in a rate of 0.1% by weight or more and 20% by weight or less based on a total amount of the solder powder. When these solder paste compositions are evenly applied onto an electronic circuit substrate for precoating, such a solder that does not generate any swollen portion, solder-lacking portion and variability in a height thereof can be formed irrespective of a shape of a pad.

Abstract: A node terminal including an internal memory for saving a program transmitted from a server, a CPU for executing the program, a hash value calculating section for performing an operation of the program using a specified hash function when the execution of the program is completed, and a digital signature executing section for digitally signing the program operated using the hash function and the execution result of the program, using a secret key peculiar to the node and saved in a secret key storage, and a microprocessor capable of guaranteeing that the content of a memory is not unjustly falsified during the execution of the program.

Abstract: An imaging lens unit includes, from an object side, a diaphragm, a first lens, and a second lens placed on an image side of the first lens. The first lens is a positive meniscus lens convex toward the object side, and at least one side of the first lens has an aspherical surface. The second lens is a meniscus lens convex toward the image side, and at least one side of the second lens has an aspherical surface. Further, a maximum value of an angle between a tangent to a surface on the image side of the second lens and a normal to an optical axis is in a range of 65° to 90° within an effective diameter of the second lens.

Abstract: A sender (1) adds decoy photons to a secret photon having confidential information, then, subjects each photon to a different rotational manipulation, and passes the photons along a quantum channel (3) (S11 and S12). A receiver (2) receives those photons and then obtains information about the position of the decoy photons from the sender (1) through a classical channel (4). Using the information, the receiver (2) subjects each of the decoy and secret photons to a different rotational manipulation and transmits the photons in a rearranged order (S13 and S14). The receiver (1) obtains information about the position and manipulation quantities of the decoy photons from the receiver (2) and decodes the decoy photons. If the quantum state of the decoys is identical to their initial quantum state, the sender (1) determines that no eavesdropper (5) should be present (S15 and S16), cancels only the encryption of the secret photon performed by himself or herself in S12, and transmits the secret photon (S17).