Abstract: An insulation layer forming-composition including boehmite, a binder, and an organic solvent, wherein when a thermogravimetric analysis is performed on the boehmite and measurement is conducted at a temperature elevation rate of 10° C./min under an air flow, the weight reduction percentage in a range of 200-450° C. is 10.0 mass % or less, and the weight reduction percentage in a range of 450-600° C. is 5.0-13.5 mass %.

Abstract: In a thermo-physical property measurement instrument, a light shield that shields from light except for an aperture is provided facing the front surface of a sample thin film of a sample. Heating light of repeated pulse that is output from a heating laser irradiates the sample thin film through the light shield. Temperature measurement light of continuous light that is output from a temperature measurement laser is applied to a measurement position a predetermined distance away from a heating light irradiation position on the sample thin film. A photodetector detects reflected light of the temperature measurement light off the sample thin film, and a computer acquires a thermo-reflectance signal that was digitally converted by an AD converter. The computer calculates a thermo-physical property value in the in-plane direction of the sample thin film of the sample on the basis of the acquired thermo-reflectance signal.

Abstract: In a thermo-physical property measurement instrument, a light shield that shields from light except for an aperture is provided facing the front surface of a sample thin film of a sample. Heating light of repeated pulse that is output from a heating laser irradiates the sample thin film through the light shield. Temperature measurement light of continuous light that is output from a temperature measurement laser is applied to a measurement position a predetermined distance away from a heating light irradiation position on the sample thin film. A photodetector detects reflected light of the temperature measurement light off the sample thin film, and a computer acquires a thermo-reflectance signal that was digitally converted by an AD converter. The computer calculates a thermo-physical property value in the in-plane direction of the sample thin film of the sample on the basis of the acquired thermo-reflectance signal.

Abstract: This physical property value measurement device irradiates a specimen with a heating beam arrived at through intensity-pulse modulation of output light of a heating laser and irradiates the specimen with a temperature probe beam that is output light from a temperature probe laser and is delayed relative to the heating beam. The component of a detection signal for the reflected light of the temperature probe beam that is synchronous with the frequency of the intensity-pulse modulation is amplified using a lock-in amplifier, and a computer that performs regression analysis on the thermoreflectance signal obtained from the lock-in amplifier.

Abstract: This physical property value measurement device irradiates a specimen with a heating beam arrived at through intensity-pulse modulation of output light of a heating laser and irradiates the specimen with a temperature probe beam that is output light from a temperature probe laser and is delayed relative to the heating beam. The component of a detection signal for the reflected light of the temperature probe beam that is synchronous with the frequency of the intensity-pulse modulation is amplified using a lock-in amplifier, and a computer that performs regression analysis on the thermoreflectance signal obtained from the lock-in amplifier.

Abstract: The present invention provides a method for measuring thermophysical properties that includes: rapid resistive self-heating of a specimen by using a heating current; emitting a light to the specimen heated by the rapid resistive self-heating of the specimen; measuring a temperature change of the specimen induced by emitting the light to the specimen; and deriving a thermal diffusivity of the specimen from the temperature change induced by emitting the light to the specimen.

Abstract: A measuring method eliminates the limitation of the observation time scale controlled of the optical path length, and expands the range of samples of the thermoreflectance method using a pulse laser. The method irradiates an extremely fast light pulse to a sample as a pump light pulse to excite the sample and a probe light pulse to the sample, and observes the temperature variation of the sample by detecting a reflected light from the sample. The method prepares for electrically controllable two pulse lasers: one for exciting the sample, another one for probing, separately. By electrically controlling the difference between the time at which the exciting light irradiates the sample and the time at which the probing light irradiates the sample, the method detects a signal that varies depending on the time difference between the pump pulse and the probe pulse.

Abstract: The present invention provides a method for measuring thermophysical properties that includes: rapid resistive self-heating of a specimen by using a heating current; emitting a light to the specimen heated by the rapid resistive self-heating of the specimen; measuring a temperature change of the specimen induced by emitting the light to the specimen; and deriving a thermal diffusivity of the specimen from the temperature change induced by emitting the light to the specimen.

Abstract: A polishing film includes a plastic film and a polishing layer formed on its surface, having a mixture of a first group of silica particles with a first average diameter and a second group of silica particles with a second average diameter fixed in a resin binder, the first average diameter and the second diameter being different from each other and both within a range of 0.001-10 ?m. The mixture of the two groups of silica particles has a granularity distribution curve with two peaks at two different diameter values corresponding to the first and second average diameters.

Abstract: It is an object of the present invention to to realize heat capacity measurement per unit area of a thin film with a thickness of 1 micrometer or less which is formed a substrate. According to the present invention, a ratio of a heat capacity per unit area of the thin film formed on a substrate and a thermal effusivity of the substrate is measured and regarding a thermal effusivity of the substrate as a known value, a heat capacity per unit area of the thin film is measured.

Abstract: An optical system including an objective lens applies five light beams (31 to 35) generated by an optical pickup to a plurality of adjacent tracks on a signal plane of a CD-ROM. Light beams reflected from the signal plane are detected with photodetectors (PD1, to PD6), and in accordance with the detection outputs of the photodetectors (PD1 to PD5), a record data read system reads at the same time data recorded on respective tracks applied with the light beams (31 to 35), and outputs to read data in the record order of CD-ROM by preventing the read data from being duplicated or omitted. Prior to reading record data, a system controller performs an offset bias adjustment of a focus servo system.

Abstract: A polishing film includes a plastic film and a polishing layer formed on its surface, having a mixture of a first group of silica particles with a first average diameter and a second group of silica particles with a second average diameter fixed in a resin binder, the first average diameter and the second diameter being different from each other and both within a range of 0.001-10 &mgr;m. The mixture of the two groups of silica particles has a granularity distribution curve with two peaks at two different diameter values corresponding to the first and second average diameters.

Abstract: Optical fiber connectors each with a plurality of optical fibers protruding from the front surface of a main body by improved and uniform distances are produced by being subjected to an etching step in which a textile pad free of abrading particles and a slurry containing abrading particles of a relatively larger size are used and thereafter to a final fine polishing step in which a polishing pad with a porous and compressive sponge-like material without affixed abrading particles and a slurry of another kind containing relatively smaller abrading particles are used. The sponge-like material may be polyurethane and is required to have hardness and pores with sizes within specified ranges.

Abstract: A polishing film includes a plastic film and a polishing layer formed on its surface, having a mixture of a first group of silica particles with a first average diameter and a second group of silica particles with a second average diameter fixed in a resin binder, the first average diameter and the second diameter being different from each other and both within a range of 0.001-10 &mgr;m. The mixture of the two groups of silica particles has a granularity distribution curve with two peaks at two different diameter values corresponding to the first and second average diameters.

Abstract: The measuring method of the invention eliminates the limitation of the observation time scale controlled of the optical path length, and expands the range of samples of the thermoreflectance method using a pulse laser. The method irradiates an extremely fast light pulse to a sample as a light pulse to excite the sample and a probe light pulse to the sample, and observes the temperature variation of the sample by detecting a reflected light from the sample. The method prepares for electrically controllable two pulse lasers: one for exciting the sample, another one for probing, separately. By electrically controlling the difference between the time at which the exciting light irradiates the sample and the time at which the probing light irradiates the sample, the method detects a signal that varies depending on the time difference between the pump pulse and the probe pulse.

Abstract: Optical fiber connectors each with a plurality of optical fibers protruding from the front surface of a main body by improved and uniform distances are produced by being subjected to an etching step in which a textile pad free of abrading particles and a slurry containing abrading particles of a relatively larger size are used and thereafter to a final fine polishing step in which a polishing pad with a porous and compressive sponge-like material without affixed abrading particles and a slurry of another kind containing relatively smaller abrading particles are used. The sponge-like material may be polyurethane and is required to have hardness and pores with sizes within specified ranges.

Abstract: An apparatus and method for measuring thermophysical property value of a specimen. The apparatus includes a heating laser and probe laser for measuring at least one characteristic on the surface of the specimen. A detector detects the reflected probe laser beam, and a computer calculates the thermophysical property value of the specimen based on the reflected probe laser beam.

Abstract: A non-metal film whose thermophysical properties are unknown is disposed between a first metal film and a second metal film, thereby forming a sample having a three-layer structure. The metal films have predetermined known thermophysical properties, belong to the same sort of substance and have the same thickness. The three-layer substance is disposed on a transparent substrate and is heated from below the second metal film, using a picosecond light pulse coming from below and passing through the transparent substrate. The light pulse used in the irradiation is converted into heat in the second metal film during only one picosecond, with such heat diffusing through interface/non-metal film layer/interface and thus arriving at the first metal film. By measuring a temperature change on the surface of the first metal film, it is possible to perform correct measurement by using the thermoreflectance method formerly suggested in a patent application by the inventors of the present invention.

Abstract: Optical fiber connectors each with a plurality of optical fibers protruding from the front surface of a main body by improved and uniform distances are produced by being subjected to an etching step in which a textile pad free of abrading particles and a slurry containing abrading particles of a relatively larger size are used and thereafter to a final fine polishing step in which a polishing pad with a porous and compressive sponge-like material without affixed abrading particles and a slurry of another kind containing relatively smaller abrading particles are used. The sponge-like material may be polyurethane and is required to have hardness and pores with sizes within specified ranges.

Abstract: An apparatus and method for measuring thermophysical property value of a specimen. The apparatus includes a heating laser and probe laser for ? on the surface of the specimen. A detector detects the reflected probe laser beam, and a computer calculates the thermophysical property value of the specimen based on the reflected probe laser beam.