Toray Industries, Inc.

Olympus Medical Systems Corporation

Osaka Gas Company Limited

Soda Aromatic Co., Ltd.

Atsushi Niwa

Masahiro Sato

Hiroaki Kinoshita

Shinzo Imamura

Makoto Hanabata

Akio Hasebe

Satsuki Kitajima

Junko Katayama

Ito Nobuhiko

An immersion solution for a microscope, the immersion solution including a metal-halogeno complex anion containing bromine or iodine and one or more types of metal elements M selected from Sn, In, Bi, Sb, Zn and Al, and an imidazolium cation, a pyridinium cation, a pyrrolidinium cation or an ammonium cation. The immersion solution includes an ionic liquid that transmits light having a predetermined wavelength, has a refractive index of no less than 1.60 and is used for a fluorescence microscope.

Immersion solution for microscope

A photoactive compound is used in combination with a photosensitizer, represented by the following formula (1):A-[(J)-(X-Pro)]&#x2003;&#x2003;(1)wherein A represents a hydrophobic unit comprising at least one kind of hydrophobic groups selected from a hydrocarbon group and a heterocyclic group, J represents a connecting group, X-Pro represents a hydrophilic group protected by a protective group Pro which is removable by light exposure, m represents 0 or 1, and n represents an integer of not less than 1. The protective group Pro may be removable by light exposure in association with the photosensitizer (especially, a photo acid generator), or may be a hydrophobic protective group. The hydrophilic group may be a hydroxyl group or a carboxyl group. The photoactive compound has high sensitivity to a light source of short wavelength beams, for resist application, therefore, the photoactive compound is advantageously used for forming a pattern with high resolution.

Optically active compound and photosensitive resin composition

Method for producing alkyl carboxylates by multi-stage esteridication

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Kyoto, Japan

Atsushi Niwa