Abstract: The present invention has for its object to provide an apparatus and a method for transferring boards, and a component mounting apparatus whereby a production efficiency can be improved in accordance with types of boards to be produced. For accomplishing the objective, there are arranged a shift device capable of moving a mounted board from a process-finished board transfer path to an unprocessed board transfer path, a controller for controlling the moving, and further an identifying device. The arrangement enables switching the method of transferring boards in accordance with types of boards to be produced, and controlling the supply of board to the component mounting apparatus, so that the production efficiency is improved in accordance with types of boards.

Abstract: An electronic component mounting apparatus includes a plurality of pickup nozzles (1) which are attached to the periphery of a rotary table, that intermittently rotates. The apparatus also includes a cylindrical cam (105) having a cam groove (106, 107a, 107b) which allows the pickup nozzles (1) to move up and down. A first roller (5) is attached to a first slide portion (4a), which is equipped with the pickup nozzles 1. The first roller runs within the cam grooves (106, 107a, 107b) to make the pickup nozzles 1 move up and down. A second roller (6) is attached to a second slide portion 4b, which is attached to the pickup nozzles (1). The second roller runs within the cam grooves (106, 107a, 107b) to make the pickup nozzles move up and down together with the first roller. Also, springs (9) are provided for biasing the first and second rollers (5, 6) into contact with the two side surfaces, respectively, of the cam grooves (106, 107a, 107b).

Abstract: Electrophotographic transfer paper having a coating layer provided on at least one surface of base paper and pigments and adhesive agents as main components, wherein resistivity (VR) and surface resistivity (SV) of electrophotographic transfer paper after the humidity has adjusted to 10.degree. C., 30% RH for 12 hours satisfy the expression Log(VR/SR).ltoreq.1.5. Using such electrophotographic transfer paper, occurrence of discharge mark and occurrence of density irregularity in a high-density image region are prevented to thereby make it possible to provide electrophotographic transfer paper excellent in fixing characteristic, nonshowthrough, partial deletion and generation of paper dust.

Abstract: An electronic component feeder is provided for feeding electronic components in their stable position into an electronic component mounting apparatus and allowing the taking up of a top tape with high stability thus increasing the speed of component mounting action. As the top tape (4) is being taken up on a reel (42), a shutter (34) moves backward together with a slit (51) provided integral on the shutter (34). The turning in the tape take-up direction of the reel (42) is driven by the restoring force of a return spring (39). When the reel (42) has completed its take-up motion, the electronic component (1) can be picked up at a component pick-up location with the shutter (34) staying backward. A stationary roller (31) is provided between the slit (51) and the reel (42) and a movable roller (32) is provided for keeping the length of the top tape (4) between the slit (51) and the stationary roller (31) substantially constant.

Abstract: Electrophotographic transfer paper having a coating layer provided on at least one surface of base paper and pigments and adhesive agents as main components, wherein resistivity (VR) and surface resistivity (SV) of electrophotographic transfer paper after the humidity has adjusted to 10.degree. C., 30% RH for 12 hours satisfy the expression Log(VR/SR).ltoreq.1.5. Using such electrophotographic transfer paper, occurrence of discharge mark and occurrence of density irregularity in a high-density image region are prevented to thereby make it possible to provide electrophotographic transfer paper excellent in fixing characteristic, nonshowthrough, partial deletion and generation of paper dust.

Abstract: Transfer paper for electrophotography of the present invention includes base paper; and a coating layer provided on at least one side of the base paper. The coating layer includes a pigment and a binder, has a solids content in the range of 2 to 10 g/m.sup.2, and has void-free areas containing no voids having a circle-equivalent diameter of equal to or more than 1 .mu.m and void area containing voids whose circle-equivalent diameter is equal to or more than 1 .mu.m. A proportion of void areas whose equivalent circle diameter is more than 20 .mu.m is not more than 2%, and the average equivalent circle diameter of the void areas and that of the void-free areas as observed on the surface of the coating layer satisfy at least one of the following conditions: (1) the average equivalent circle diameter of the void areas and that of the void-free areas are each from 1.5 to 10 .mu.m; (2) the average equivalent circle diameter of the void areas and that of the void-free areas are each 0.2 to 1.

Abstract: Electrophotographic transfer paper of the present invention satisfies at least one of expression of L.sub.MD /H.sub.MD .gtoreq.60 and L.sub.CD /H.sub.CD .gtoreq.35, where MD represents a paper direction parallel to the movement direction of a paper machine, L.sub.MD (cm) represents stiffness in MD, CD represents a paper direction perpendicular to the movement direction of the paper machine, and H.sub.CD (%) represents expansivity in CD.

Abstract: A video signal processing apparatus is arranged to process a composite information signal which is formed by multiplexing first and second information signals having different frequency bands. When the composite information signal recorded on a recording medium is reproduced, the first information signal is extracted from the reproduced composite information signal and a first detection signal is obtained by subjecting the extracted first information signal to a detection process. The second information signal is also extracted from the reproduced composite information signal and a second detection signal is obtained by subjecting the extracted second information signal to a detection process. The first and second detection signals are compared with each other. A correction process is performed on the composite information signal reproduced from the recording medium according to the result of comparison. The reproduced composite information signal can be adequately corrected by virtue of the arrangement.

Abstract: A mounting apparatus for mounting electronic components, includes a component feeding section wherein plural component feeding units accommodating plural components and sequentially supplying components to a predetermined component take-out position are arranged on a moving table along a moving direction, a positioning mechanism of a mounting member to which one component is to be mounted, and a mounting device for holding one component at a predetermined position in the feeding section and mounting the component onto the mounting member. The mounting device includes a movable member which is vertically movable and has a gas groove which is formed at an inside part of the movable member, and a rotary member which is rotatable around a vertical axis of the movable member and has at its inside part a gas groove which is formed at an inside part of the rotary member and is communicated with the groove of the movable member so as to transmit gas between the grooves during operation.

Abstract: A component placement machine for mounting, on a substrate placed in position by an XY-table, a first electronic component supplied from an electronic component-supply section, includes an electronic component-holding portion for holding the first electronic component and being vertically movable; and a device for setting a movement-prohibiting time period of the XY-table by calculating a period of time in which there is a possibility that the first electronic component and a second electronic component mounted on the substrate may interfere with each other, based on a height of the first electronic component and a maximum height of the second electronic component.

Abstract: Recently, there has been the tendency to increasingly use optical machinery and devices which utilize optical parts made of synthetic resin. Since an antireflection coating film for these synthetic resin optical parts is high in adhesive strength and is hard, it is advantageous to use silicon oxide. Particularly, silicon monoxide (SiO) varies in refractive index by varying the evaporation condition, and therefore, it is possible to make use of such properties to produce a multi-layered antireflection coating film from a single evaporation material by varying the evaporation conditions.

Abstract: In a two or three anti-reflection coating, a .lambda..degree./2 layer is replaced by a composite layer.The composite layer is characterized by a higher equivalent inhomogeneity .phi.' than the inhomogeneity .phi. of the .lambda..degree./2 layer.

Abstract: The mask blank is provided with a transparent coating layer interposed between a transparent substrate and a mask metal layer. The transparent coating layer is made of material which is resistant to an etching solution.

Abstract: The photomask blank comprises a transparent substrate, a chromium film directly formed on the substrate and having a thickness of less than 15 m.mu., an intermediate layer formed on the chromium film and containing chromium oxide and a metal mask layer made of chromium and formed on the intermediate layer. The intermediate layer comprises a single chromium oxide film or a composite layer of a chromium oxide film and a pure chromium film or a mixture of chromium and chromium oxide. The photomask is prepared by etching the chromium film, the intermediate layer and the mask layer of the photomask blank described above.

Abstract: The photomask blank comprises a transparent substrate, a first chromium film formed on the substrate by sputtering, a second chromium film formed on the first chromium film by vacuum evaporation and a chromium oxide film by vacuum evaporation. The relative thickness of the two chromium films and the chromium oxide film is adjusted to improve resolution of a pattern and to decrease reflectance.