ETCHING METHOD FOR ELECTRODE FOIL OF ALUMINUM ELECTROLYTIC CAPACITOR
PURPOSE:To manufacture an electrode foil for an aluminum electrolytic capacitor having an area increasing magnification by 20% or more higher than a conventional one and to reduce in size and cost a product by etching the surface of the foil with a positive symmetrical waveform with 5ms or less of r...
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| creator | KOJIMA KOICHI KANZAKI NOBUYOSHI GEJIYOU AKIHIRO |
| description | PURPOSE:To manufacture an electrode foil for an aluminum electrolytic capacitor having an area increasing magnification by 20% or more higher than a conventional one and to reduce in size and cost a product by etching the surface of the foil with a positive symmetrical waveform with 5ms or less of rising time of maximum current value of each cycle of an AC current. CONSTITUTION:When the surface of an aluminum foil is etched with an AC current in hydrochloric acid solution containing 3-25% of aluminum chloride at 10-70 deg.C of liquid temperature, it is etched in solution containing acidic acid or ions of one or more types of nitric acid, sulfuric acid, phosphoric acid, oxalic acid as an additive with symmetrical positive and negative waveform having 5ms or less of rising time up to maximum current value of each cycle of an AC current. An etching current at the anode is abruptly raised at 5ms or less to generate an etching pitch uniformly from a defect of a strong film to obtain the foil having an area increasing magnification by approx. 20% higher than that of a conventional one. |
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CONSTITUTION:When the surface of an aluminum foil is etched with an AC current in hydrochloric acid solution containing 3-25% of aluminum chloride at 10-70 deg.C of liquid temperature, it is etched in solution containing acidic acid or ions of one or more types of nitric acid, sulfuric acid, phosphoric acid, oxalic acid as an additive with symmetrical positive and negative waveform having 5ms or less of rising time up to maximum current value of each cycle of an AC current. An etching current at the anode is abruptly raised at 5ms or less to generate an etching pitch uniformly from a defect of a strong film to obtain the foil having an area increasing magnification by approx. 20% higher than that of a conventional one.</description><language>eng</language><subject>APPARATUS THEREFOR ; BASIC ELECTRIC ELEMENTS ; CAPACITORS ; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE ; CHEMISTRY ; ELECTRICITY ; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES ; METALLURGY ; PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROMOBJECTS</subject><creationdate>1990</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=19900307&DB=EPODOC&CC=JP&NR=H0266925A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76290</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19900307&DB=EPODOC&CC=JP&NR=H0266925A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>KOJIMA KOICHI</creatorcontrib><creatorcontrib>KANZAKI NOBUYOSHI</creatorcontrib><creatorcontrib>GEJIYOU AKIHIRO</creatorcontrib><title>ETCHING METHOD FOR ELECTRODE FOIL OF ALUMINUM ELECTROLYTIC CAPACITOR</title><description>PURPOSE:To manufacture an electrode foil for an aluminum electrolytic capacitor having an area increasing magnification by 20% or more higher than a conventional one and to reduce in size and cost a product by etching the surface of the foil with a positive symmetrical waveform with 5ms or less of rising time of maximum current value of each cycle of an AC current. CONSTITUTION:When the surface of an aluminum foil is etched with an AC current in hydrochloric acid solution containing 3-25% of aluminum chloride at 10-70 deg.C of liquid temperature, it is etched in solution containing acidic acid or ions of one or more types of nitric acid, sulfuric acid, phosphoric acid, oxalic acid as an additive with symmetrical positive and negative waveform having 5ms or less of rising time up to maximum current value of each cycle of an AC current. An etching current at the anode is abruptly raised at 5ms or less to generate an etching pitch uniformly from a defect of a strong film to obtain the foil having an area increasing magnification by approx. 20% higher than that of a conventional one.</description><subject>APPARATUS THEREFOR</subject><subject>BASIC ELECTRIC ELEMENTS</subject><subject>CAPACITORS</subject><subject>CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE</subject><subject>CHEMISTRY</subject><subject>ELECTRICITY</subject><subject>ELECTROLYTIC OR ELECTROPHORETIC PROCESSES</subject><subject>METALLURGY</subject><subject>PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROMOBJECTS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1990</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZHBxDXH28PRzV_B1DfHwd1Fw8w9ScPVxdQ4J8ndxBfI8fRT83RQcfUJ9Pf1CfWFSPpEhns4Kzo4Bjs6eIf5BPAysaYk5xam8UJqbQcENZK5uakF-fGpxQWJyal5qSbxXgIeBkZmZpZGpozERSgABbyuY</recordid><startdate>19900307</startdate><enddate>19900307</enddate><creator>KOJIMA KOICHI</creator><creator>KANZAKI NOBUYOSHI</creator><creator>GEJIYOU AKIHIRO</creator><scope>EVB</scope></search><sort><creationdate>19900307</creationdate><title>ETCHING METHOD FOR ELECTRODE FOIL OF ALUMINUM ELECTROLYTIC CAPACITOR</title><author>KOJIMA KOICHI ; KANZAKI NOBUYOSHI ; GEJIYOU AKIHIRO</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JPH0266925A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1990</creationdate><topic>APPARATUS THEREFOR</topic><topic>BASIC ELECTRIC ELEMENTS</topic><topic>CAPACITORS</topic><topic>CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE</topic><topic>CHEMISTRY</topic><topic>ELECTRICITY</topic><topic>ELECTROLYTIC OR ELECTROPHORETIC PROCESSES</topic><topic>METALLURGY</topic><topic>PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROMOBJECTS</topic><toplevel>online_resources</toplevel><creatorcontrib>KOJIMA KOICHI</creatorcontrib><creatorcontrib>KANZAKI NOBUYOSHI</creatorcontrib><creatorcontrib>GEJIYOU AKIHIRO</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>KOJIMA KOICHI</au><au>KANZAKI NOBUYOSHI</au><au>GEJIYOU AKIHIRO</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>ETCHING METHOD FOR ELECTRODE FOIL OF ALUMINUM ELECTROLYTIC CAPACITOR</title><date>1990-03-07</date><risdate>1990</risdate><abstract>PURPOSE:To manufacture an electrode foil for an aluminum electrolytic capacitor having an area increasing magnification by 20% or more higher than a conventional one and to reduce in size and cost a product by etching the surface of the foil with a positive symmetrical waveform with 5ms or less of rising time of maximum current value of each cycle of an AC current. CONSTITUTION:When the surface of an aluminum foil is etched with an AC current in hydrochloric acid solution containing 3-25% of aluminum chloride at 10-70 deg.C of liquid temperature, it is etched in solution containing acidic acid or ions of one or more types of nitric acid, sulfuric acid, phosphoric acid, oxalic acid as an additive with symmetrical positive and negative waveform having 5ms or less of rising time up to maximum current value of each cycle of an AC current. An etching current at the anode is abruptly raised at 5ms or less to generate an etching pitch uniformly from a defect of a strong film to obtain the foil having an area increasing magnification by approx. 20% higher than that of a conventional one.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | APPARATUS THEREFOR BASIC ELECTRIC ELEMENTS CAPACITORS CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE CHEMISTRY ELECTRICITY ELECTROLYTIC OR ELECTROPHORETIC PROCESSES METALLURGY PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROMOBJECTS |
| title | ETCHING METHOD FOR ELECTRODE FOIL OF ALUMINUM ELECTROLYTIC CAPACITOR |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-30T05%3A03%3A16IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-epo_EVB&rft_val_fmt=info:ofi/fmt:kev:mtx:patent&rft.genre=patent&rft.au=KOJIMA%20KOICHI&rft.date=1990-03-07&rft_id=info:doi/&rft_dat=%3Cepo_EVB%3EJPH0266925A%3C/epo_EVB%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_id=info:pmid/&rfr_iscdi=true |