{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,1]],"date-time":"2026-03-01T03:38:30Z","timestamp":1772336310599,"version":"3.50.1"},"reference-count":33,"publisher":"AIP Publishing","issue":"5","funder":[{"DOI":"10.13039\/501100002241","name":"Japan Science and Technology Agency","doi-asserted-by":"publisher","award":["ST262009TT"],"award-info":[{"award-number":["ST262009TT"]}],"id":[{"id":"10.13039\/501100002241","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2018,5,1]]},"abstract":"<jats:p>The measurement and control of trace moisture, where the water concentration is lower than 1 ppmv [\u221276.2 \u00b0C for the frost point (\u00b0CFP)], are essential for improving the yield rate of semiconductor devices and for ensuring their reliability. A ball surface acoustic wave (SAW) sensor with a sol-gel silica coating exhibited useful characteristics for a trace moisture analyzer (TMA) when the temperature drift of the delay time output was precisely compensated using two-frequency measurement (TFM), where the temperature-compensated relative delay time change (RDTC) was obtained by subtracting the RDTC at the fundamental frequency from that at the third harmonic frequency on an identical propagation path. However, the cost of the measurement circuit was a problem. In this study, a burst waveform undersampling (BUS) circuit based on the theory of undersampling measurement was developed as a practical means. The BUS circuit was useful for precise temperature compensation of the RDTC, and the ball SAW TMA was prototyped by calibrating the RDTC using a TMA based on cavity ring-down spectroscopy (CRDS), which is the most reliable method for trace moisture measurement. The ball SAW TMA outputted a similar concentration to that obtained by the CRDS TMA, and its response time at a set concentration in N2 with a flow rate of 1 l\/min was about half that of the CRDS TMA, suggesting that moisture of \u221280 \u00b0CFP was measured within only 1 min. The detection limit at a signal-to-noise ratio of 3 was estimated to be 0.05 ppbv, comparable with that of the CRDS TMA. From these results, it was demonstrated that a practical ball SAW TMA can be realized using the developed BUS circuit.<\/jats:p>","DOI":"10.1063\/1.4993928","type":"journal-article","created":{"date-parts":[[2018,5,21]],"date-time":"2018-05-21T15:09:44Z","timestamp":1526915384000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":7,"title":["Development of ball surface acoustic wave trace moisture analyzer using burst waveform undersampling circuit"],"prefix":"10.1063","volume":"89","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3663-4078","authenticated-orcid":false,"given":"Toshihiro","family":"Tsuji","sequence":"first","affiliation":[{"name":"Department of Materials Processing, Graduate School of Engineering, Tohoku University 1 , Sendai 980-8579, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Toru","family":"Oizumi","sequence":"additional","affiliation":[{"name":"Ball Wave, Inc. 2 , Sendai 980-8579, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hideyuki","family":"Fukushi","sequence":"additional","affiliation":[{"name":"Ball Wave, Inc. 2 , Sendai 980-8579, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nobuo","family":"Takeda","sequence":"additional","affiliation":[{"name":"Ball Wave, Inc. 2 , Sendai 980-8579, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shingo","family":"Akao","sequence":"additional","affiliation":[{"name":"Ball Wave, Inc. 2 , Sendai 980-8579, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yusuke","family":"Tsukahara","sequence":"additional","affiliation":[{"name":"Ball Wave, Inc. 2 , Sendai 980-8579, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kazushi","family":"Yamanaka","sequence":"additional","affiliation":[{"name":"Ball Wave, Inc. 2 , Sendai 980-8579, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"317","published-online":{"date-parts":[[2018,5,21]]},"reference":[{"key":"2023080508324865500_c1","doi-asserted-by":"publisher","first-page":"202","DOI":"10.1016\/j.sna.2005.12.049","volume":"128","year":"2006","journal-title":"Sens. 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