MAGNETO-OPTICAL RECORDING MEDIUM
PURPOSE:To attain alloying of a sputtering target and to improve productivity as well as the characteristics as a recording medium by using a specific alloy consisting of light rare earth metals in addition to heavy rare earth metals and transition metals. CONSTITUTION:The medium is constituted of &...
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| creator | FUNADA SHIN |
| description | PURPOSE:To attain alloying of a sputtering target and to improve productivity as well as the characteristics as a recording medium by using a specific alloy consisting of light rare earth metals in addition to heavy rare earth metals and transition metals. CONSTITUTION:The medium is constituted of >=1 kinds among the light rare earth metals Ce, Pr, Nd, Sm, and Eu, >=1 kinds among the heavy rare earth metals Tb, Dy and Gd including Tb invariably, and >=1 kinds among the transition metals Fe, Co and Ni, in which the total content of Tb is confined to =1 kinds among the light rare earth metals in addition to the heavy rare earth metals and the transition metals to the medium. The prepn. of the magneto-optical recording medium by a sputtering method using the alloy target which is made by a casting method and has an extremely low level of impurity concn. The degradation in the magnetic characteristics is thus prevented. |
| format | Patent |
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CONSTITUTION:The medium is constituted of >=1 kinds among the light rare earth metals Ce, Pr, Nd, Sm, and Eu, >=1 kinds among the heavy rare earth metals Tb, Dy and Gd including Tb invariably, and >=1 kinds among the transition metals Fe, Co and Ni, in which the total content of Tb is confined to <=20atom.%. The need for the temp. control of a casting mold at the time of melting and casting is eliminated and the production efficiency and yield of the sputtering target are improved by adding the elements of >=1 kinds among the light rare earth metals in addition to the heavy rare earth metals and the transition metals to the medium. The prepn. of the magneto-optical recording medium by a sputtering method using the alloy target which is made by a casting method and has an extremely low level of impurity concn. The degradation in the magnetic characteristics is thus prevented.</description><language>eng</language><subject>BASIC ELECTRIC ELEMENTS ; CHEMICAL SURFACE TREATMENT ; CHEMISTRY ; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL ; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL ; COATING MATERIAL WITH METALLIC MATERIAL ; COATING METALLIC MATERIAL ; DIFFUSION TREATMENT OF METALLIC MATERIAL ; ELECTRICITY ; INDUCTANCES ; INFORMATION STORAGE ; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER ; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL ; MAGNETS ; METALLURGY ; PHYSICS ; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES ; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION ; TRANSFORMERS</subject><creationdate>1988</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19881223&DB=EPODOC&CC=JP&NR=S63316341A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19881223&DB=EPODOC&CC=JP&NR=S63316341A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>FUNADA SHIN</creatorcontrib><title>MAGNETO-OPTICAL RECORDING MEDIUM</title><description>PURPOSE:To attain alloying of a sputtering target and to improve productivity as well as the characteristics as a recording medium by using a specific alloy consisting of light rare earth metals in addition to heavy rare earth metals and transition metals. CONSTITUTION:The medium is constituted of >=1 kinds among the light rare earth metals Ce, Pr, Nd, Sm, and Eu, >=1 kinds among the heavy rare earth metals Tb, Dy and Gd including Tb invariably, and >=1 kinds among the transition metals Fe, Co and Ni, in which the total content of Tb is confined to <=20atom.%. The need for the temp. control of a casting mold at the time of melting and casting is eliminated and the production efficiency and yield of the sputtering target are improved by adding the elements of >=1 kinds among the light rare earth metals in addition to the heavy rare earth metals and the transition metals to the medium. The prepn. of the magneto-optical recording medium by a sputtering method using the alloy target which is made by a casting method and has an extremely low level of impurity concn. The degradation in the magnetic characteristics is thus prevented.</description><subject>BASIC ELECTRIC ELEMENTS</subject><subject>CHEMICAL SURFACE TREATMENT</subject><subject>CHEMISTRY</subject><subject>COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL</subject><subject>COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL</subject><subject>COATING MATERIAL WITH METALLIC MATERIAL</subject><subject>COATING METALLIC MATERIAL</subject><subject>DIFFUSION TREATMENT OF METALLIC MATERIAL</subject><subject>ELECTRICITY</subject><subject>INDUCTANCES</subject><subject>INFORMATION STORAGE</subject><subject>INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER</subject><subject>INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL</subject><subject>MAGNETS</subject><subject>METALLURGY</subject><subject>PHYSICS</subject><subject>SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES</subject><subject>SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION</subject><subject>TRANSFORMERS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1988</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZFDwdXT3cw3x1_UPCPF0dvRRCHJ19g9y8fRzV_B1dfEM9eVhYE1LzClO5YXS3AyKbq4hzh66qQX58anFBYnJqXmpJfFeAcFmxsaGZsYmho7GxKgBAAFLIjc</recordid><startdate>19881223</startdate><enddate>19881223</enddate><creator>FUNADA SHIN</creator><scope>EVB</scope></search><sort><creationdate>19881223</creationdate><title>MAGNETO-OPTICAL RECORDING MEDIUM</title><author>FUNADA SHIN</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JPS63316341A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1988</creationdate><topic>BASIC ELECTRIC ELEMENTS</topic><topic>CHEMICAL SURFACE TREATMENT</topic><topic>CHEMISTRY</topic><topic>COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL</topic><topic>COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL</topic><topic>COATING MATERIAL WITH METALLIC MATERIAL</topic><topic>COATING METALLIC MATERIAL</topic><topic>DIFFUSION TREATMENT OF METALLIC MATERIAL</topic><topic>ELECTRICITY</topic><topic>INDUCTANCES</topic><topic>INFORMATION STORAGE</topic><topic>INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER</topic><topic>INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL</topic><topic>MAGNETS</topic><topic>METALLURGY</topic><topic>PHYSICS</topic><topic>SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES</topic><topic>SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION</topic><topic>TRANSFORMERS</topic><toplevel>online_resources</toplevel><creatorcontrib>FUNADA SHIN</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>FUNADA SHIN</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>MAGNETO-OPTICAL RECORDING MEDIUM</title><date>1988-12-23</date><risdate>1988</risdate><abstract>PURPOSE:To attain alloying of a sputtering target and to improve productivity as well as the characteristics as a recording medium by using a specific alloy consisting of light rare earth metals in addition to heavy rare earth metals and transition metals. CONSTITUTION:The medium is constituted of >=1 kinds among the light rare earth metals Ce, Pr, Nd, Sm, and Eu, >=1 kinds among the heavy rare earth metals Tb, Dy and Gd including Tb invariably, and >=1 kinds among the transition metals Fe, Co and Ni, in which the total content of Tb is confined to <=20atom.%. The need for the temp. control of a casting mold at the time of melting and casting is eliminated and the production efficiency and yield of the sputtering target are improved by adding the elements of >=1 kinds among the light rare earth metals in addition to the heavy rare earth metals and the transition metals to the medium. The prepn. of the magneto-optical recording medium by a sputtering method using the alloy target which is made by a casting method and has an extremely low level of impurity concn. The degradation in the magnetic characteristics is thus prevented.</abstract><oa>free_for_read</oa></addata></record> |
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| language | eng |
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| subjects | BASIC ELECTRIC ELEMENTS CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL ELECTRICITY INDUCTANCES INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL MAGNETS METALLURGY PHYSICS SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TRANSFORMERS |
| title | MAGNETO-OPTICAL RECORDING MEDIUM |
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