Canon Kabushiki Kaisha

Naoyuki Koketsu

Akira Sugiyama

Yoshinori Kotani

Kenji Takashima

Zuyi Zhang

Akiko Takei

Motokazu Kobayashi

Tetsuo Hino

Fumio Uchida

Minako Nakasu

Chiemi Shimizu

Provided is a coating liquid for forming a piezoelectric thin film containing lead zirconate titanate, the coating liquid including a complex precursor containing at least three kinds of metal elements of Pb, Ti, and Zr, the coating liquid being free from an exothermic peak at a temperature of 450&#xb0; C. or more, or having a heat generation amount at a temperature of from 400&#xb0; C. to 450&#xb0; C., which is larger than a heat generation amount at a temperature of from 450&#xb0; C. to 500&#xb0; C., in differential thermal analysis of the coating liquid.

Coating liquid for forming piezoelectric thin film, method of producing coating liquid for forming piezoelectric thin film, piezoelectric thin film, method of manufacturing piezoelectric thin film, and liquid ejection head

Provided is a glass composition having an infrared absorbing function, water resistance, heat resistance, and a low expansion coefficient, the glass composition including the following components (a) to (c): (a) 0.1 wt % or more to 14.0 wt % or less of an intermediate oxide; (b) 0.1 wt % or more to 14.0 wt % or less of CuO; and (c) 80.0 wt % or more to 99.8 wt % or less of silica, in which a total of a content ratio of the intermediate oxide and a content ratio of the CuO is from 0.2 wt % or more to 20 wt % or less.

Glass composition and method of manufacturing the same, and glass member and image pickup device

Provided is a sliding member, which is reduced in friction under sliding conditions of high load and high speed under an oilless condition, and is excellent in wear resistance. The sliding member includes: a shaft; and at least one intervening member, in which: the at least one intervening member is located between the shaft and a bearing, and is operable independently of the shaft; and at least one surface of the at least one intervening member on a shaft side includes a sliding surface under one of a radial load and an axial load.

Sliding member and sliding mechanism

A piezoelectric thin film is manufactured by sequentially executing: a step of coating a substrate by applying a coating solution containing an organic solvent and a piezoelectric thin film precursor to form a coating layer; a step of evaporating the organic solvent from the coating layer in a windless environment to obtain a dried coating layer containing the piezoelectric thin film precursor; and a step of heating the dried coating layer to form a piezoelectric thin film from the dried coating layer containing the piezoelectric thin film precursor.

Piezoelectric thin film, method of manufacturing the same, piezoelectric thin film manufacturing apparatus and liquid ejection head

To provide, between separated first sliding surfaces (DLC), a material of which frictional coefficient is higher than that of DLC at a temperature of 25&#xb0; C. and a humidity of 45% as a second sliding surface.

Sliding member, sliding device including sliding member, and electrophotographic image forming apparatus including sliding device

An optical member including a porous glass layer on a base member is provided, wherein the reflectance is reduced and a ripple is suppressed. The optical member is provided with a base member and a glass layer holding a transparent material in the inside of a porous structure disposed on the base member, wherein in the thickness direction of the glass layer, the porosity in the base member side with respect to the center line of the glass layer in the thickness direction is smaller than the porosity in the side opposite to the base member with respect to the center line of the glass layer in the thickness direction.

Optical member, image pickup apparatus, and method for manufacturing optical member

The present invention provides an optical member having a high transmittance, wherein a composition change of a phase-separable base material glass film is suppressed. A method for manufacturing an optical member provided with a porous glass film on the base member includes the steps of forming a glass powder film containing a glass powder on the base member, forming a phase-separable base material glass film on the base member by heating and fusing the glass powder film in an atmosphere having an oxygen concentration of more than 20%, forming a phase-separated glass film on the base member by heating the base material glass film, and forming a porous glass film on the base member by subjecting the phase-separated glass film to an etching treatment.

Method for manufacturing a porous glass film

The present invention provides an optical member including a porous glass film on a base member, wherein a ripple is suppressed. The optical member includes the base member and the porous glass film disposed on the base member, wherein the porosity increases in the direction from the base member toward the porous glass film in an interfacial region between the base member and the porous glass film and the porosity is continuous in the film thickness direction from the base member to the surface of the porous glass film in the optical member.

An imaging apparatus for imaging a subject image from a lens on an imaging element through an optical filter has a porous body having pores which three dimensionally communicate with each other at least at a side opposite to the imaging element of the optical filter.

Imaging apparatus and image forming apparatus having continuous pores in three dimensions in porous body

The present invention provides a method for producing a porous glass layer easily, wherein a ripple is suppressed. A method for manufacturing an optical member provided with a porous glass layer on a base member includes the steps of forming an intermediate layer containing at least one of silicon, potassium, and aluminum on the base member, forming a phase-separable glass layer on the intermediate layer, forming a phase-separated glass layer on the base member by heating the intermediate layer and the phase-separable glass layer at a temperature higher than or equal to the glass transition temperature of the phase-separable glass layer, and forming a porous glass layer on the base member by subjecting the phase-separated glass layer to an etching treatment.

Method for manufacturing optical member

A method for manufacturing a porous glass includes: forming a phase-separated glass by heating at a temperature in a range of 300 to 500 degrees Celsius for 3 to 50 hours for phase separation of a glass body in which the concentration of SiOis 50 to 70 percent by weight, the concentration of BOis 15 to 40 percent by weight, the concentration of LiO is 1.0 to 8.0 percent by weight, the concentration of NaO is 2.0 to 8.0 percent by weight, the concentration of KO is 0.3 to 5.0 percent by weight, the total concentration of LiO, NaO, and KO is 3.5 to 15 percent by weight, and the ratio of the concentration of KO to the total concentration of LiO, NaO, and KO is 0.10 to 0.30; and forming a porous glass by etching the phase-separated glass.

Method for manufacturing porous glass, and method for manufacturing optical element

This invention provides a porous glass with a varied porous structure that shows an excellent optical performance. A method of manufacturing a porous glass comprising: a first step of forming a surface layer containing a boron compound and an alkali metal compound as main ingredients on a matrix glass containing a silicon oxide, a boron oxide and an alkali metal oxide; a second step of heat treatment the matrix glass and the surface layer for phase separation to form a phase-separated glass; and a third step of acid treatment the phase-separated glass to form the porous glass having pores.

Growing community of inventors

Tokyo, Japan

Naoyuki Koketsu