{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,19]],"date-time":"2026-01-19T12:16:54Z","timestamp":1768825014879,"version":"3.49.0"},"reference-count":13,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2012,4,10]],"date-time":"2012-04-10T00:00:00Z","timestamp":1334016000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Micromachines"],"abstract":"<jats:p>A novel capacitive tactile sensor using a polyurethane thin film is proposed in this paper. In previous studies, capacitive tactile sensors generally had an air gap between two electrodes in order to enhance the sensitivity. In this study, there is only polyurethane thin film and no air gap between the electrodes. The sensitivity of this sensor is higher than the previous capacitive tactile sensors because the polyurethane is a fairly flexible elastomer and the film is very thin (about 1 \u00b5m). The polyurethane film is formed by spin-coating and etched back from 6 \u00b5m to 1 \u00b5m using 48% sulfuric acid. As a result of evaluation, the sensitivity of the developed sensor (diameter is 1 mm) is 1.3 pF\/Pa (800 pF\/N considering the sensing area). Young\u2019s modulus of the thin polyurethane film was estimated to be 20 kPa.<\/jats:p>","DOI":"10.3390\/mi3020315","type":"journal-article","created":{"date-parts":[[2012,4,10]],"date-time":"2012-04-10T11:09:50Z","timestamp":1334056190000},"page":"315-324","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":17,"title":["Flexible Tactile Sensor Using Polyurethane Thin Film"],"prefix":"10.3390","volume":"3","author":[{"given":"Masato","family":"Suzuki","sequence":"first","affiliation":[{"name":"Faculty of Engineering Science, Kansai University, 3-3-35 Yamate-cho, Suita, Osaka 564-8680, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tomokazu","family":"Takahashi","sequence":"additional","affiliation":[{"name":"Faculty of Engineering Science, Kansai University, 3-3-35 Yamate-cho, Suita, Osaka 564-8680, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Seiji","family":"Aoyagi","sequence":"additional","affiliation":[{"name":"Faculty of Engineering Science, Kansai University, 3-3-35 Yamate-cho, Suita, Osaka 564-8680, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2012,4,10]]},"reference":[{"key":"ref_1","unstructured":"Maxwell, J.C. 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Today"},{"key":"ref_11","unstructured":"Available online:http:\/\/www.exseal.net\/data.html."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"246","DOI":"10.1541\/ieejsmas.128.246","article-title":"Development of an arrayed tactile sensor having four stories and recognition of contact using neural networks","volume":"128","author":"Ono","year":"2008","journal-title":"IEE J. Trans. Sens. Micromach."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"3342","DOI":"10.1088\/0022-3727\/34\/15\/102","article-title":"A novel technique for mechanical characterization of thin elastomeric membrane","volume":"34","author":"Liu","year":"2001","journal-title":"J. Phys. 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