JP2014189408A - PNbZT強誘電体薄膜の形成方法 - Google Patents
PNbZT強誘電体薄膜の形成方法 Download PDFInfo
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Abstract
【解決手段】Nbを含まないPZT強誘電体薄膜を形成するための組成物を基板10に形成された下部電極11上に塗布し、仮焼した後、焼成して結晶化させることにより、厚さ45〜90nmの結晶化促進層12を形成し、上記形成した結晶化促進層12上に組成物に含まれるペロブスカイトBサイト原子(Zr、Ti)との合計100原子%中にNbが4〜10原子%含まれるPNbZT強誘電体薄膜を形成するための組成物を塗布してPNbZTの塗膜13aを形成し、この塗膜13aを、仮焼した後、焼成して結晶化させることにより、上記下部電極11上にPNbZT強誘電体薄膜を形成する。
【選択図】図1
Description
結晶化促進層を形成するためのPZT強誘電体薄膜形成用組成物として、金属組成比が115/53/47(Pb/Zr/Ti)であり、1−ブタノールを溶媒に用いて希釈した前駆体濃度(Pb源、Zr源、Ti源の合計)が酸化物換算で12質量%に調整されたPZTゾルゲル液(三菱マテリアル株式会社製 商品名:PZT−E1)を用意した。また、PNbZT強誘電体薄膜を形成するための組成物として、金属組成比が115/8/47.8/44.2(Pb/Nb/Zr/Ti)であり、1−ブタノールを溶媒に用いて希釈した前駆体濃度(Pb源、Nb源、Zr源、Ti源の合計)が酸化物換算で15質量%に調整されたPNbZTゾルゲル液(三菱マテリアル株式会社製 商品名:PNbZT−E1)を用意した。即ち、この組成物には、Bサイト原子(Zr、Ti)との合計100原子%中にNbが8原子%含まれる。
結晶化促進層の厚さが、以下の表1に示す厚さになるように、PZTゾルゲル液の塗布量を調整したこと以外は、実施例1−1と同様にして下部電極上にPNbZT強誘電体薄膜を形成した。なお、比較例1−1では、PZTゾルゲル液の塗布量を0、即ち結晶化促進層を形成せず、下部電極上にPNbZTゾルゲル液を直接塗布し、実施例1−1と同様の条件で仮焼、焼成等を行い、PNbZT強誘電体薄膜を形成した。
上記PNbZTゾルゲル液の製造時に仕込組成を変更することにより、結晶化促進層中のNb添加量を、以下の表1に示す割合に変更したこと以外は、実施例1−1と同様にして下部電極上にPNbZT強誘電体薄膜を形成した。
実施例1−1〜2−2及び比較例1−1〜2−2で形成したPNbZT強誘電体薄膜について、結晶化促進層とPNbZT強誘電体薄膜の厚さ、下部電極と結晶化促進層の結晶配向性、PNbZT強誘電体薄膜の膜組織(クラックの有無)、電気特性(比誘電率)、リーク電流密度を評価した。これらの結果を以下の表1に示す。
11 下部電極
12 結晶化促進層
13a PNbZTの塗膜
Claims (2)
- Nbを含まないチタン酸ジルコニウム酸鉛(PZT)系複合ペロブスカイト膜からなる強誘電体薄膜を形成するための組成物を基板に形成された下部電極上に塗布し、仮焼した後、焼成して結晶化させることにより、厚さ45〜90nmの結晶化促進層を形成し、
前記形成した結晶化促進層上に、Bサイト原子(Zr、Ti)との合計100原子%中にNbが4〜10原子%含まれるチタン酸ジルコニウムニオブ酸鉛(PNbZT)系複合ペロブスカイト膜からなる強誘電体薄膜を形成するための組成物を塗布してPNbZTの塗膜を形成し、
前記塗膜を仮焼した後、焼成して結晶化させることにより、前記下部電極上にPNbZT強誘電体薄膜を形成することを特徴とするPNbZT強誘電体薄膜の製造方法。 - 請求項1記載の方法により形成されたPNbZT強誘電体薄膜を有する薄膜コンデンサ、キャパシタ、IPD、DRAMメモリ用コンデンサ、積層コンデンサ、トランジスタのゲート絶縁体、不揮発性メモリ、焦電型赤外線検出素子、圧電素子、電気光学素子、アクチュエータ、共振子、超音波モータ、電気スイッチ、光学スイッチ又はLCノイズフィルタ素子の複合電子部品の製造方法。
Priority Applications (7)
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JP2013063179A JP6036460B2 (ja) | 2013-03-26 | 2013-03-26 | PNbZT強誘電体薄膜の形成方法 |
US14/181,542 US10005101B2 (en) | 2013-03-26 | 2014-02-14 | Method of forming PNbZT ferroelectric thin film |
EP14155334.7A EP2784802B1 (en) | 2013-03-26 | 2014-02-17 | Method of forming PNbZT ferroelectric thin film |
NO14155334A NO2784802T3 (ja) | 2013-03-26 | 2014-02-17 | |
TW103105197A TWI601706B (zh) | 2013-03-26 | 2014-02-18 | PNbZT強介電體薄膜之製造方法 |
KR1020140018263A KR102007543B1 (ko) | 2013-03-26 | 2014-02-18 | PNbZT 강유전체 박막의 제조 방법 |
CN201410057519.3A CN104072135B (zh) | 2013-03-26 | 2014-02-19 | PNbZT铁电薄膜的制造方法和复合电子部件 |
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JP2013063179A JP6036460B2 (ja) | 2013-03-26 | 2013-03-26 | PNbZT強誘電体薄膜の形成方法 |
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US (1) | US10005101B2 (ja) |
EP (1) | EP2784802B1 (ja) |
JP (1) | JP6036460B2 (ja) |
KR (1) | KR102007543B1 (ja) |
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CN110128169A (zh) * | 2019-05-10 | 2019-08-16 | 济南大学 | 采用钙离子掺杂的SiO2膜对压电陶瓷表面进行改性的方法及其应用 |
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US10242922B2 (en) * | 2014-01-09 | 2019-03-26 | Infineon Technologies Ag | Circuit and method for internally assessing dielectric reliability of a semiconductor technology |
US20170092841A1 (en) * | 2015-09-29 | 2017-03-30 | Canon Kabushiki Kaisha | Substrate for piezoelectric body formation, method for manufacturing the same, piezoelectric substrate, and liquid ejection head |
KR101910157B1 (ko) * | 2018-08-06 | 2018-10-19 | 영창케미칼 주식회사 | 유무기 하이브리드 포토레지스트 공정액 조성물 |
CN111505005B (zh) * | 2020-04-25 | 2021-05-18 | 中南大学 | 一种利用锆石快速判断脉状矿床成矿潜力的矿产勘查方法 |
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TW201446701A (zh) | 2014-12-16 |
KR20140117262A (ko) | 2014-10-07 |
TWI601706B (zh) | 2017-10-11 |
US10005101B2 (en) | 2018-06-26 |
KR102007543B1 (ko) | 2019-08-05 |
NO2784802T3 (ja) | 2018-03-17 |
EP2784802A1 (en) | 2014-10-01 |
JP6036460B2 (ja) | 2016-11-30 |
CN104072135A (zh) | 2014-10-01 |
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