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公开(公告)号：JPH0549036B2
公开(公告)日：1993-07-23
申请号：JP11793388
申请日：1988-05-14
Applicant: HOYA CORP
Inventor： YOKOTA RYOSUKE , YOSHIDA SHUJI
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公开(公告)号：JPH05174423A
公开(公告)日：1993-07-13
申请号：JP33875791
申请日：1991-12-20
Applicant: HOYA CORP
Inventor： MIYAZONO YASUSHI , YOSHIDA SHUJI
Abstract: PURPOSE:To provide the reloadable optical information recording medium which can stably repeat recording and erasing having a high contrast ratio >=10 times. CONSTITUTION:This reloadable optical information recording medium has a substrate, an substrate protective layer which is deposited on this substrate and contains Y2O3, a recording layer which is deposited on this substrate protective layer and is expressed by general formula: [(GeTe)x(Sb2Te3)1-x]100-ASbA. (where A is
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公开(公告)号：JPH05174422A
公开(公告)日：1993-07-13
申请号：JP33875391
申请日：1991-12-20
Applicant: HOYA CORP
Inventor： MIYAZONO YASUSHI , YOSHIDA SHUJI
Abstract: PURPOSE:To provide the reloadable optical information recording medium which can stably repeat recording and erasing having a high contrast ratio >=10 times. CONSTITUTION:This reloadable optical information recording medium has a recording layer on a substrate. This recording layer contains the components expressed by general formula: [(GeTe)x(Sb2Te3)1-x]100-ASbA (where A is 20 to 80mol% and X is 0.25 to 1). In addition, the medium has a protective layer contg. Y2O3 on at least the front surface of this recording layer.
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公开(公告)号：JPH0397638A
公开(公告)日：1991-04-23
申请号：JP23185989
申请日：1989-09-07
Applicant: HOYA CORP
Inventor： OMI SHIGEAKI , YOSHIDA SHUJI
Abstract: PURPOSE:To increase the concn. of fine particles by specifying the compsn. and concn. of fine particles when a mixture contg. starting materials for multicomponent glass as a matrix and starting material for the fine particles to be deposited is converted into molten glass and the fine particles are deposited in the matrix glass. CONSTITUTION:A mixture contg. starting materials for multicomponent glass as a matrix and starting material for fine particles to be deposited is converted into molten glass and the fine particles are deposited in the matrix glass to obtain multicomponent glass contg. dispersed fine particles. At this time, crystalline fine particles of CdSxSeyTez (0
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公开(公告)号：JPH01302551A
公开(公告)日：1989-12-06
申请号：JP25334688
申请日：1988-10-07
Applicant: HOYA CORP
Inventor： YOKOTA RYOSUKE , YOSHIDA SHUJI , NAKAZAWA SHINJI
Abstract: PURPOSE:To increase the reflectivity in recording and erasing and to preserve the recording stably over a long period of time by using a material having a specific compsn. to form the recording layer of the rewritable phase change type optical memory medium. CONSTITUTION:The recording layer of the rewritable phase change type optical memory medium is constituted of a ternary alloy consisting of In-Sb-Te or quaternary alloy consisting of In-Sb-Te-Se and the ratios of the metal elements are limited as follows: a=4-28atomic%, b=17-4atomic%, content c of M (Te or Te+Se)=46-53atomic%. The erasing time is reduced to =20% if the (c) is limited to the above-mentioned value. In addition, the number of repetition of recording and erasing is increased and the recording is preserved stably over a long period of time.
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Patent Agency Ranking
公开(公告)号：JPH10188372A
公开(公告)日：1998-07-21
申请号：JP21625597
申请日：1997-08-11
Applicant: HOYA CORP
Inventor： YOKOTA RYOSUKE , YOSHIDA SHUJI , NAKAZAWA SHINJI
IPC: B41M5/26 , C01B19/04 , C23C14/14 , C30B29/46 , G11B7/00 , G11B7/0055 , G11B7/24 , G11B7/243 , G11B7/26 , G11B7/30
Abstract: PROBLEM TO BE SOLVED: To provide a process for producing a reloadable phase transition type optical memory medium capable of producing the reloadable phase transition type optical memory medium which is short in the erasing time of recorded information and is stable in a recording state. SOLUTION: A thin film consisting of a material which is an In-Sb-Te-base martial or an In-Sb-Te-Se-base martial formed by substituting part of the Te of this In-Sb-Te-base martial with Se and has the compsn. expressed by the general formula (In)a (Sb)b (M)c (where, an indicating the ratio of In is 4 to 28atm.%; b indicating the ratio of Sb is 17 to 44atm.%, M is Te, or Te+Se; c indicating the ratio of M is 46 to 63atm.% and the atom ratio of Se to the content of Te and Se is
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公开(公告)号：JPH09196853A
公开(公告)日：1997-07-31
申请号：JP778896
申请日：1996-01-19
Applicant: HOYA CORP
Inventor： YOSHIDA SHUJI
Abstract: PROBLEM TO BE SOLVED: To provide a gas sensor, which can detect toxic gas at high sensitivity, by using a merocyanine compound as gas sensitive material. SOLUTION: In this gas sensor, a base material is desirably coated with a merocyanine compound 2 as the sensitive material at two layers or more. The merocyanine compound 2 is a compound expressed by formula [1[, and in the formula, R means an alkyl group at 1-30 of the number of carbon, each of R , R , R , R means hydrogen atom, an alkyl group at 1-3 of the number of carbon or a halogen atom, and A means chalcogen atom, and (n) means an integer number of 1-3. A higher fatty acid and higher alcohol or the like is used as the fluorescence reinforcing agent for sharpening the fluorescence of the merocyanine compound as the sensitive material.
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公开(公告)号：JPH0560435B2
公开(公告)日：1993-09-02
申请号：JP8792087
申请日：1987-04-11
Applicant: HOYA CORP
Inventor： YOKOTA RYOSUKE , YOSHIDA SHUJI , NAKAZAWA SHINJI
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公开(公告)号：JPH01220236A
公开(公告)日：1989-09-01
申请号：JP4720388
申请日：1988-02-29
Applicant: HOYA CORP
Inventor： YOKOTA RYOSUKE , YOSHIDA SHUJI , MIYAZONO YASUSHI
Abstract: PURPOSE:To obtain a rewritable phase change type optical memory medium by using a Ge-Bi-Te-Se glass material having the compsn. existing in the compsn. region within 2atom.% from the straight line indicating the material expressed by the general formula (GeTe)x(Bi2Te3-ySey)1-x on a triangular compsn. diagram. CONSTITUTION:This rewritable phase change type optical memory medium contains the Ge-Bi-Te-Se glass material having the compsn. existing in the compsn. region within 2atom.% from the straight line indicating the material expressed by the general formula (GeTe)x(Bi2Te3-ySey)1-x (where x=0.1-0.6, y=0-1.5) on the triangular compsn. diagram when Ge, Bi, Te or Te+Se is taken at the respective vertexes. All of the various conditions regarded to be necessary in practicable use, for example, percentage modulation (>=20%), the number of rewritable times (>=10 times), long-term preservable property (>=10 years), and erasing time (
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公开(公告)号：JPS6489050A
公开(公告)日：1989-04-03
申请号：JP24621987
申请日：1987-09-30
Applicant: HOYA CORP
Inventor： MIYAZONO YASUSHI , YOKOTA RYOSUKE , YOSHIDA SHUJI , NAKAZAWA SHINJI
Abstract: PURPOSE:To highly maintain the preservable stability of recording and to enable the execution of high-speed erasing simultaneously by incorporating respectively specific ratios of a Te element, Si element and Sn element into the title material. CONSTITUTION:The Si element is added at 15atom.% as an upper limit with respect to >=75atom.% Te element which is the essential component of the recording film into the recording film. Sn is simultaneously incorporated therein at 10atom.% as the upper limit. The crystallization temp. is, therefore, increased and the phase change from the amorphous state to the crystalline state is simultaneously and rapidly executed. The recording film material which is not only extremely improved in the preservable stability of recording but is also extremely reducible in erasing time is thereby obtd. The material which is widely applicable to computers and recorders for image filing is thus obtd.
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