Abstract: Perspective viewing inspection system comprises a stage for holding a printed circuit board (PCB) mounted with electronic parts, teaching means for teaching position data and pose data of the PCB during inspection and also part electrode's addresses on the PCB, means for making an inspection program including layout of inspection areas, means for imaging the inspection areas of the PCB, means for evaluating part-mounting and soldering quality or means for displaying images captured therewith, and means for coordinating the whole system operations. The means for imaging involves an active vision system consisting of an active mirror, an active objective, an ocular, a zoom leans, and an imaging device enabling gaze at solder joints and capture of bird's eye perspective view images thereof. The stage is equipped with a PCB pose controller to orient the PCB at directions wherewith the means for imaging obtains the solder joint's angular perspective view images.

Abstract: A method of producing a paraffin wax for aqueous dispersion polymerization of TFE which allows high speed aqueous dispersion polymerization of TFE with excellent polymerization behavior such as excellent dispersion stability and consistent production of PTFE having excellent physical properties, and a method of producing PTFE using the paraffin wax. Aqueous dispersion polymerization of tetrafluoroethylene (hereinafter referred to as TFE) is conducted in the presence of a paraffin wax, a polymerization initiator and an emulsifier at least once and then the paraffin wax is recovered. The recovered paraffin wax is used for aqueous dispersion polymerization of TFE in the presence of a polymerization initiator and an emulsifier.

Abstract: The method and apparatus are provided for preparing a slurry for a CMP apparatus with simple configuration with which mixing accuracy for the slurry is improved and measurement is automatically accomplished for as a small amount of additive. A slurry preparation apparatus for a CMP apparatus comprises a tank for preparing the slurry, a weight sensor provided to the tank, and a stock solution feeder for the slurry which feeds a stock solution for the slurry into the tank. The weight sensor measures the weight of the tank, and the amount of the slurry to be supplied is controlled according to the measurements.

Abstract: The apparatus is provided for preparing and/or supplying a slurry for a CMP apparatus in which a device is adopted to avoid drying a slurry thereby eliminating coagulation and solidification of the slurry. A slurry preparation apparatus comprises a tank for preparing and/or supplying the slurry, a humidity sensor located inside the tank, a humidifying air supply device for supplying humidifying air into the tank. Humidity in the tank is measured by the humidity sensor, and the amount of humidifying air to be supplied from the humidifying air supply device is controlled according to the measurements, thereby conditioning inside the tank to a desired humidity.

Abstract: The method and apparatus are provided for preparing a slurry for a CMP apparatus with which mixing accuracy for a slurry is improved and accurate measurement is automatically accomplished for H2O2 as a small amount of additive. A slurry preparation apparatus for a CMP apparatus comprises a tank for preparing the slurry, a stock solution feeder for the slurry which feeds a stock solution for the slurry into the tank, and a concentration measurement instrument located outside the tank, which is capable of measuring an additive concentration in the slurry in the tank. The concentration measurement instrument measures the additive concentration in the slurry in the tank, and the amount of the stock solution for the slurry to be supplied is controlled according to the measurements.

Abstract: A process for producing a tetrafluoroethylene polymer, which comprises polymerizing tetrafluoroethylene in an aqueous medium in the presence of a water-soluble initiator, wherein the water used for the polymerization is regulated to have a TOC of 100 ppb or lower and/or an electrical conductivity of 1.0 &mgr;S/cm or lower. When this process for producing a tetrafluoroethylene polymer is employed, a decrease or fluctuation in the polymerization rate during the polymerization of tetrafluoroethylene will be minimal, and a deterioration in the physical properties of the obtained tetrafluoroethylene polymer will be minimal.

Abstract: A tetrafluoroethylene polymer is produced by polymerizing tetrafluoroethylene in the presence of an aqueous medium and a polymerization initiator, wherein the content of impurities (e.g. a saturated compound such as CH2F2 or CHF3 and an unsaturated compound such as CF2═CFH, CF2═CH2, CF2═CFCl or CF2═CHCl) in the tetrafluoroethylene is not more than 100 ppm. By this method, PTFE which is uniform and stretchable at a high stretch ratio and which is excellent in the fibrillation property and has a high break strength, can be obtained.

Abstract: A PTFE composition comprising a dispersion-polymerized polytetrafluoroethylene (PTFE) and a filler, wherein the powder irregular shape ratio of the PTFE is at most 50%, and a PTFE granulated product obtained by granulating the PTFE composition. The composition is produced by jetting high pressure water to a mixture comprising the dispersion-polymerized PTFE and the filler. The dispersion-polymerized PTFE composition and granulated product thus obtained are suitable for molding.

Abstract: A tetrafluoroethylene polymer having high stretchability, a fibrillatable character and a non-melt fabricable quality, which has a standard specific gravity of at most 2.160, and a tensile break strength of from 32.0N (3.26 kgf) to 49.0N (5.0 kgf) or an endothermic ratio of at most 0.15 as calculated from the measurement by differential thermal analysis. The tetrafluoroethylene polymer is suitable for stretching operation after paste extrusion.

Abstract: A composition comprising from 30 to 65 wt % of fine particles of PTFE, and, based on PTFE, from 2 to 12 wt % of C10H21CH(CH3)CH2O(C2H4O)9C3H6OH and at least 0.01 wt % and less than 1 wt % of a polyethylene oxide having an average molecular weight of from 100,000 to 2,000,000.

Abstract: A process for producing a tetrafluoroethylene polymer, which comprises polymerizing tetrafluoroethylene in an aqueous medium in the presence of a dispersant, a stabilizer and a polymerization initiator, wherein the polymerization initiator is a redox polymerization initiator comprising a halogen acid salt YXO3/a sulfite Z2SO3 wherein X is a chlorine atom, a bromine atom or an iodine atom, Y is a hydrogen atom, ammonium, an alkali metal or an alkaline earth metal, and Z is ammonium, an alkali metal or an alkaline earth metal. By this process, it is possible to obtain a tetrafluoroethylene polymer which is suitable for a stretching operation after paste extrusion.

Abstract: A tetrafluoroethylene polymer having high stretchability, a fibrillatable character and a non-melt fabricable quality, which has a standard specific gravity of at most 2.160, and a tensile break strength of from 32.0 N (3.26 kgf) to 49.0 N (5.0 kgf) or an endothermic ratio of at most 0.15 as calculated from the measurement by differential thermal analysis. The tetrafluoroethylene polymer is suitable for stretching operation after paste extrusion.

Abstract: A method of producing a paraffin wax for aqueous dispersion polymerization of TFE which allows high speed aqueous dispersion polymerization of TFE with excellent polymerization behavior such as excellent dispersion stability and consistent production of PTFE having excellent physical properties, and a method of producing PTFE using the paraffin wax. Aqueous dispersion polymerization of tetrafluoroethylene (hereinafter referred to as TFE) is conducted in the presence of a paraffin wax, a polymerization initiator and an emulsifier at least once and then the paraffin wax is recovered. The recovered paraffin wax is used for aqueous dispersion polymerization of TFE in the presence of a polymerization initiator and an emulsifier.

Abstract: A PTFE composition comprising a dispersion-polymerized polytetrafluoroethylene (PTFE) and a filler, wherein the powder irregular shape ratio of the PTFE is at most 50%, and a PTFE granulated product obtained by granulating the PTFE composition. The composition is produced by jetting high pressure water to a mixture comprising the dispersion-polymerized PTFE and the filler. The dispersion-polymerized PTFE composition and granulated product thus obtained are suitable for molding.

Abstract: Multi-modal soldering inspection system comprises means for automatic inspection involving imaging means for acquiring solder joint images, mode-selecting means for selecting auto mode, review mode, or eye mode, means for integrating inspection data obtained in the auto and the review modes, replay means for replaying images acquired with the imaging means to display them, input means for inputting the review data, and storage for storing the inspection data.

Abstract: An X stage (21) arranged on the front edge of a table (11) is movable in the X-axis direction along a rail (23). The X stage (21) supports a light projecting device (70) for illuminating a printed circuit board (PCB) and an imaging device (80) for imaging an inspection area illuminated by the light projecting device (70). An image obtained by the imaging device (80) is displayed on a display device (13). A Y stage (41) is movably provided along a rail (33) on a base (10). A board supporting member (50) for supporting the board (PCB) is pivotably attached to the Y stage (41) at front portion thereof. An inspector judges whether or not soldering is acceptable while seeing the image displayed on the display device (13). When it is judged that soldering is unacceptable, the inspector can correct an unacceptable soldered portion by drawing out the Y stage (41) forward and obliquely raising the board supporting member (50).

Abstract: A pair of folding orthogonal mirrors is disclosed, including first and second plates, each provided on a face thereof with a surface mirror; hinges, attached to the first and second plates to movably join the two together, so that the plates are movable from an unfolded position, in which the surface mirrors on each of the plates are arranged orthogonally, to a folded position, in which the surface mirrors on each of the plates face one another. The pair of folding orthogonal mirrors is provided with a magnet assembly, attached to the first and second plates, for maintaining the plates in the unfolded position by magnetic attraction; and include means for adjusting the angle between the surface mirrors in the unfolded position.

Abstract: To provide a method and an instrument capable of easily and accurately measuring a size of an affected part present in a body of a patient, there is provided a measuring instrument 1 including at least four sheets of acrylic plates having indices of a substance of X-ray image forming performance of metal balls 2 and 3, metal wires and the like in which sets of two sheets of the acrylic plates are arranged in parallel to each other and a space defined by the sets of acrylic plates arranged in parallel, is provided with an interval capable of receiving a part of a patient to be measured, such as the head or the like.

Abstract: An air ventilation or supply system includes a blower for generating a primary flow and an induction nozzle for inducing a secondary flow produced by entrainment of the primary flow. An inlet of the blower and an inlet for the induction nozzle are adjacent each other.

Abstract: An operator actuates keyboard (22) to register board name of a board for teaching (ST11), sets a reference board (1S) on a Y-axis table unit (4) to actuate a start key (ST12), inputs reference points of the reference board (1S) to be set to an original position (ST13), takes a picture of a predetermined area on the reference board to teach a mounting position (ST14), and reads data about component image and its decision criteria of the corresponding component from a component kind table (19) to be stored as teaching data (ST15). This operation is repeatedly executed until all components are taught to a mounted component inspection device which inspects mounting qualities of a plurality of components mounted on an inspected board.