JP5441877B2 - 圧電マクロ−ファイバー複合アクチュエータ及びその製造方法 - Google Patents
圧電マクロ−ファイバー複合アクチュエータ及びその製造方法 Download PDFInfo
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Description
図1において、本発明の方法の第1段階(第1ステップ)は、強誘電ウェハ20を準備することを含む。例えば、ウェハ20は、電極が付されてない圧電材料から形成される。一実施例として、PZT−5圧電セラミック材料を用いてウェハ20が形成される。しかしながら、その他の圧電材料を用いてウェハ20を製造できることは理解されるべきである。好ましい実施例において、圧電ウェハ20は、約0.002インチ(0.0051cm)〜約0.010インチ(0.025cm)の厚みを有する。
図9は本発明の別の実施例の圧電ファイバーアクチュエータ100を示す。せん断モードアクチュエータ100は、連続的な捩りモーメントが主体構造部、例えば、高縦横比構造体、ビーム、スパー(円材、spars)等に容易に生じせしめられ得るように構成される。せん断モードアクチュエータ100は、一般に、フィルム102,104及び圧電ファイバーを有する。フィルム102、104及びファイバー106は、前述したようなエポキシ材を用いて互いに接着される。圧電ファイバー106は分離スロット108を有し、これらの分離スロット108は、前述したように切断又はスライス加工により得られたものである。ファイバー106は、縦方向に延びる縦伸長側縁部110を形成している。スロット108は、縦伸長側縁部110に対して、所定の角度で形成されている。好ましくは、各スロット108は、縦伸長側縁部110に対し45°の角度をもって形成される。何故ならば、そのような配向角度とすることにより、主体構造部内に最適な圧電せん断応力を誘起するからである。しかしながら、スロット108は縦伸長側縁部110に対しその他の異なった角度をもって形成してもよい。
本発明の方法は、非常に多数の圧電ファイバーを製造しかつ個々に取り扱う必要性を実質的に省略できることである。したがって、当該圧電ファイバー複合アクチュエータの包装(パッケージ化、packaging)に関する製造時間及び処理コストが有意に低減される。本発明の方法は、容易に制御されかつ精密であり、製造されるアクチュエータの反復性及び均一性を大いに高める。本発明の方法は、アクチュエータ電極を損傷する危険性なく、断面四角形状のファイバーを製造して該ファイバーをアクチュエータ包装(パッケージ)内で容易に整列(アライメント)させることができる。したがって、四角形断面の圧電ファイバーの使用に関連した難点が実質的に解消される。丸形ファイバーに代わる本発明の断面四角形状のファイバーの使用により、アクチュエータ包装(パッケージ)内での圧電材料の体積分率(volume fraction)の増大が許容され、これにより、当該アクチュエータの作動応力性能(actuation stress capability)を改善することができる。また、液体エポキシ又は異方性導電接着剤により取付けられる、比較的厚い銅導電性パターンの使用により、圧電材料と電極との間に無妨害電気接続を施すことができる。その結果、アクチュエータ電極の電界転送効率が有意に改善され、したがって単位印加電圧当りの歪発生率が増大する。更に、方形又は矩形ファイバーは、電極に対し実質的に平坦な接触領域を有するという利点を有する。この平坦接触領域は、丸形ファイバーで達成される接触領域よりも比較的大きい。
22 ポリマー下敷きシート
24 スロット
26 圧電マクロ−ファイバー
28 絶縁性フィルム
30 厚膜銅導電性パターン又は電極
32 厚膜銅導電性パターン又は電極
34 縦伸長部分
36 交互配置電極
38 縦伸長部分
40 交互配置電極
42 エポキシ樹脂塗布(底)電極フィルム
44 厚膜銅導電性パターン又は電極
46 導電性パターン又は電極
50 交互配置電極
54 交互配置電極
56 矢印
68 導電性伸長部
70 導電性伸長部
100 アクチュエータ(第1実施例)
102 フィルム
104 フィルム
106 圧電ファイバー
108 スロット
110 縦伸長(側縁)部分
112 導電性パターン
114 導電性パターン
116 縦伸長部分
118 フィンガー又は電極
120 フィンガー又は電極
122 フィンガー又は電極
124 導電性パターン
126 導電性パターン
128 縦伸長部分
130 フィンガー又は電極
132 縦伸長部分
134 フィンガー又は電極
200 アクチュエータ(第2実施例)
202 圧電マクロ−ファイバー
204 スロット
206 フィルム
208 フィルム
210 異方性導電フィルム
212 異方性導電フィルム
218 縦伸長部分
220 電極又はフィンガー
222 縦伸長部分
224 電極又はフィンガー
226 導電性パターン
230 縦伸長部分
232 縦伸長部分
300 アクチュエータ(第3実施例)
302 厚膜圧電ウェハ
304 フィルム
306 フィルム
310 縦伸長部分
318 縦伸長部分
320 導電性パターン
322 縦伸長部分
322 縦伸長部分
324 フィンガー
326 フィンガー
328 縦伸長部分
400 アクチュエータ(第4実施例)
402 圧電ウェハ
404 スタック
410 薄厚圧電(ファイバー)シート
412 フィルム
414 フィルム
420 交互配置電極
422 導電性パターン
424 縦伸長部分
426 交互配置電極又はフィンガー
Claims (12)
- 圧電複合装置の製造方法にして、
圧電材料からなる複数のウェハを提供するステップと、
接着剤を用いて上記複数のウェハを互いに接着することにより、圧電材料と接着剤とが互い違いになる層からなる所定の厚さを有するスタックを形成する接着ステップと、
上記スタックの厚さに実質的に平行であり且つ上記層を横断する方向に上記スタックを通して切断する切断ステップであって、接着剤に対して並置された複数の圧電ファイバーからなる少なくとも1つの圧電ファイバーシートであって第1面と第2面とを有する少なくとも1つの圧電ファイバーシートを提供する、切断ステップと、
第1導電性パターンと第2導電性パターンとを有する第1フィルムを提供するステップであって、第1導電性パターンは第2導電性パターンから電気的に絶縁されており、第1導電性パターンと第2導電性パターンは、夫々、交互配置電極パターンを形成するように協働する複数の電極を備えた第1フィルムを提供するステップと、
第2フィルムを提供するステップと、
上記少なくとも1つの圧電ファイバーシートの第2面に第2フィルムを接着するステップと、
第1フィルムの上記導電性パターンが上記少なくとも1つの圧電ファイバーシートの圧電ファイバーと電気的に接するように、上記少なくとも1つの圧電ファイバーシートの第1面に第1フィルムを接着するステップと、を含む、製造方法。 - 上記圧電材料は、モノリシック圧電材料である、請求項1記載の製造方法。
- 上記圧電ファイバーは、夫々、実質的に矩形の断面形状を有する、請求項1記載の製造方法。
- 上記導電性パターンの少なくとも1つは、銅製である、請求項1記載の製造方法。
- 上記第2フィルムは、第1導電性パターンと第2導電性パターンとを有し、
第2フィルムの第1導電性パターンは、該第2フィルムの第2導電性パターンから電気的に絶縁されており、
第2フィルムの第1導電性パターンと第2導電性パターンは、夫々、交互配置電極パターンを形成するように協働する複数の電極を備え、
上記第1フィルムを接着するステップは、更に、第1フィルムの導電性パターンが第2フィルムの導電性パターンと実質的にアライメントされるように、第1フィルムを位置決めするステップを含む、請求項1記載の製造方法。 - 更に、上記第1フィルムの上記第1導電性パターンと上記第2導電性パターンに導電性伸長部を取り付けると共に、上記第2フィルムの上記第1導電性パターンと上記第2導電性パターンに導電性伸長部を取り付ける、ステップを含む、請求項5記載の製造方法。
- 上記第2フィルムを接着するステップは、更に、上記少なくとも1つの圧電ファイバーシートにエポキシ接着剤を塗布するステップを含む、請求項1記載の製造方法。
- 上記第1フィルムと上記第2フィルムは、夫々、長手方向に延びる長手軸を有し、
上記切断ステップにより、該長手軸の方向に延在する上記複数の圧電ファイバーからなる上記少なくとも1つの圧電ファイバーシートが形成される、請求項5記載の製造方法。 - 上記第1導電性パターンと上記第2導電性パターンの上記交互配置電極は、夫々、上記第1フィルムと上記第2フィルムの上記長手軸に対して実質的に直角である方向に延在すると共に、上記複数の圧電ファイバーが延在する長手方向に対して実質的に直角である方向に延在する、請求項8記載の製造方法。
- 上記第2フィルムは、第1面と第2面とを有し、
上記第2フィルムを接着するステップは、第2フィルムの第1面に接着剤層を適用するステップと、
該第2フィルムの第1面を上記少なくとも1つの圧電ファイバーシートの上記第2面上に載置するステップと、
上記接着剤層を硬化させるステップと、を含む、請求項1記載の製造方法。 - 上記第1フィルムは、第1面と第2面とを有し、
上記第1フィルムを接着するステップは、第1フィルムの第1面に第2接着剤層を適用するステップと、
該第1フィルムの第1面を上記少なくとも1つの圧電ファイバーシートの上記第1面上に載置するステップと、
上記第2接着剤層を硬化させるステップと、を含む、請求項10記載の製造方法。 - 更に、上記第1導電性パターンと上記第2導電性パターンに導電性伸長部を取り付けるステップを含む、請求項1記載の製造方法。
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KR101734292B1 (ko) * | 2015-06-23 | 2017-05-11 | 국방과학연구소 | 압전재료 적용 유니모프 작동기 |
JP2021515231A (ja) * | 2018-03-08 | 2021-06-17 | エルテック・ソチエタ・ペル・アツィオーニEltek S.P.A. | 機械応力センサ及び製造方法 |
JP7273051B2 (ja) | 2018-03-08 | 2023-05-12 | エルテック・ソチエタ・ペル・アツィオーニ | 機械応力センサ及び製造方法 |
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CA2831366A1 (en) | 2001-05-10 |
IL149169A0 (en) | 2002-11-10 |
EP1230689A1 (en) | 2002-08-14 |
US20030056351A1 (en) | 2003-03-27 |
EP1983584A2 (en) | 2008-10-22 |
EP1983584A3 (en) | 2009-05-06 |
IL166890A (en) | 2009-11-18 |
EP2267807B1 (en) | 2019-09-11 |
SG120162A1 (en) | 2006-03-28 |
JP4773659B2 (ja) | 2011-09-14 |
US6629341B2 (en) | 2003-10-07 |
EP2267807A3 (en) | 2014-08-27 |
ATE399370T1 (de) | 2008-07-15 |
IL149169A (en) | 2005-08-31 |
EP2267807A2 (en) | 2010-12-29 |
AU781033B2 (en) | 2005-04-28 |
CA2389146C (en) | 2014-01-07 |
WO2001033648A1 (en) | 2001-05-10 |
CA2389146A1 (en) | 2001-05-10 |
AU5780700A (en) | 2001-05-14 |
US20060016055A1 (en) | 2006-01-26 |
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