JP6284875B2 - 圧電体膜及びそれを備えた圧電素子、及び液体吐出装置 - Google Patents
圧電体膜及びそれを備えた圧電素子、及び液体吐出装置 Download PDFInfo
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- 239000007788 liquid Substances 0.000 title claims description 28
- 238000000034 method Methods 0.000 claims description 27
- 238000002441 X-ray diffraction Methods 0.000 claims description 21
- 239000013078 crystal Substances 0.000 claims description 21
- 229910052758 niobium Inorganic materials 0.000 claims description 14
- 238000003860 storage Methods 0.000 claims description 9
- 238000007740 vapor deposition Methods 0.000 claims description 9
- 230000005684 electric field Effects 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 6
- 229910052719 titanium Inorganic materials 0.000 claims description 5
- 229910052726 zirconium Inorganic materials 0.000 claims description 5
- 239000010408 film Substances 0.000 description 130
- 229910052451 lead zirconate titanate Inorganic materials 0.000 description 55
- 239000000976 ink Substances 0.000 description 43
- 239000000758 substrate Substances 0.000 description 32
- 239000012071 phase Substances 0.000 description 26
- 150000002500 ions Chemical class 0.000 description 18
- 230000015572 biosynthetic process Effects 0.000 description 17
- 229910052710 silicon Inorganic materials 0.000 description 16
- 238000007639 printing Methods 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 13
- 238000005245 sintering Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 11
- 239000000203 mixture Substances 0.000 description 11
- 238000010438 heat treatment Methods 0.000 description 8
- 238000004544 sputter deposition Methods 0.000 description 7
- 239000010409 thin film Substances 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 5
- 238000001947 vapour-phase growth Methods 0.000 description 5
- 238000002425 crystallisation Methods 0.000 description 4
- 230000008025 crystallization Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 238000000151 deposition Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
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- 230000002829 reductive effect Effects 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- NKZSPGSOXYXWQA-UHFFFAOYSA-N dioxido(oxo)titanium;lead(2+) Chemical compound [Pb+2].[O-][Ti]([O-])=O NKZSPGSOXYXWQA-UHFFFAOYSA-N 0.000 description 2
- 239000002019 doping agent Substances 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- HFGPZNIAWCZYJU-UHFFFAOYSA-N lead zirconate titanate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ti+4].[Zr+4].[Pb+2] HFGPZNIAWCZYJU-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000036961 partial effect Effects 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 229910052594 sapphire Inorganic materials 0.000 description 2
- 239000010980 sapphire Substances 0.000 description 2
- 238000003980 solgel method Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 229910052715 tantalum Inorganic materials 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000004876 x-ray fluorescence Methods 0.000 description 2
- 241000877463 Lanio Species 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910004121 SrRuO Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- -1 dona ions Chemical class 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
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- 239000011521 glass Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000001552 radio frequency sputter deposition Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 229910002076 stabilized zirconia Inorganic materials 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- VEALVRVVWBQVSL-UHFFFAOYSA-N strontium titanate Chemical compound [Sr+2].[O-][Ti]([O-])=O VEALVRVVWBQVSL-UHFFFAOYSA-N 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
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- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/015—Ink jet characterised by the jet generation process
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Description
下記一般式Pで表されるペロブスカイト型酸化物にSiが0.2mol%以上0.5mol%未満ドープされてなるペロブスカイト型酸化物を含み、
X線回折法により測定されるパイロクロア相がない。
A1+δ[(ZrxTi1−x)1−aNba]Oy・・・一般式P
但し、式P中、AはPbを主成分とするAサイト元素であり、Zr,Ti,及びNbはBサイト元素である。xは0超1未満、aは0.1以上0.2以下である。δ=0及びy=3が標準であるが、これらの値はペロブスカイト構造を取り得る範囲内で標準値からずれてもよい。
本発明の液体吐出装置は、上記本発明の圧電素子と、圧電素子に一体的にまたは別体として設けられた液体吐出部材とを備え、液体吐出部材は、液体が貯留される液体貯留室と、液体貯留室から外部に液体が吐出される液体吐出口とを有するものである。
下記一般式Pで表されるペロブスカイト型酸化物にSiが0.2mol%以上0.5mol%以下ドープされてなるペロブスカイト型酸化物を含み、
X線回折法により測定されたペロブスカイト相の(100)、(001)、(110)、(101)及び(111)の各面方位におけるピーク強度の総和(以下「ペロブスカイト相のX線回折ピーク強度の総和」と略す。)に対するパイロクロア相のピーク強度の比が0.25以下である。
A1+δ[(ZrxTi1−x)1−aNba]Oy・・・一般式P
但し、式P中、AはPbを主成分とするAサイト元素であり、Zr,Ti,及びNbはBサイト元素である。xは0超1未満、aは0.1以上0.3未満である。δ=0及びy=3が標準であるが、これらの値はペロブスカイト構造を取り得る範囲内で標準値からずれてもよい。
−0.2Ts+100<Vs−Vf(V)<−0.2Ts+130・・・(1)、
10≦Vs−Vf(V)≦35・・・(2)
図2を参照して、本発明に係る実施形態の圧電素子、及びこれを備えたインクジェット式記録ヘッド(液体吐出装置)の構造について説明する。図2はインクジェット式記録ヘッドの要部断面図である。視認しやすくするため、構成要素の縮尺は実際のものとは適宜異ならせてある。
上部電極50の主成分としては特に制限なく、下部電極30で例示した材料、Al,Ta,Cr,及びCu等の一般的に半導体プロセスで用いられている電極材料、及びこれらの組合せが挙げられる。
本実施形態の圧電素子1及びインクジェット式記録ヘッド2は、以上のように構成されている。
図3及び図4を参照して、上記実施形態のインクジェット式記録ヘッド2を備えたインクジェット式記録装置の構成例について説明する。図4は装置全体図であり、図4は部分上面図である。
ロール紙を使用する装置では、図3のように、デカール処理部120の後段に裁断用のカッター128が設けられ、このカッターによってロール紙は所望のサイズにカットされる。カッター128は、記録紙116の搬送路幅以上の長さを有する固定刃128Aと、固定刃128Aに沿って移動する丸刃128Bとから構成されており、印字裏面側に固定刃128Aが設けられ、搬送路を挟んで印字面側に丸刃128Bが配置される。カット紙を使用する装置では、カッター128は不要である。
印字検出部124は、印字部102の打滴結果を撮像するラインセンサ等からなり、ラインセンサによって読み取った打滴画像からノズルの目詰まり等の吐出不良を検出する。
大きめの用紙に本画像とテスト印字とを同時に並列にプリントする場合には、カッター148を設けて、テスト印字の部分を切り離す構成とすればよい。
インクジェット記録装置100は、以上のように構成されている。
本発明は上記実施形態に限定されるものではなく、本発明の趣旨を逸脱しない範囲内において、適宜設計変更可能である。
(実施例1)
成膜基板として、25mm角のSOI(Silicon on Insulater)基板上に、10nm厚のTi密着層と300nm厚のIr下部電極とが順次積層された電極付き基板を用意した。基板には、圧電定数評価のために、カンチレバーで評価できる領域を予め設けておいた。
XRDにより測定されたペロブスカイト相の(100)、(001)、(110)、(101)及び(111)の各面方位におけるピーク強度の総和に対するパイロクロア相のピーク強度の比(パイロクロア/ペロブスカイト比)が0.25以下のものであれば、良質なペロブスカイト酸化物と考えられる。
実施例1,2、比較例1〜3について、NbドープPZT膜上に100nm厚のPt上部電極を成膜し、圧電素子とした。各例のカンチレバー形成領域において、各々幅=2mm、長さ=24mm程の短冊状に加工してカンチレバーを作製した。なお、カンチレバーの長手方向がSi結晶の(110)方向に対応し、厚み方向は(100)方向に対応するようにした。
(1)周波数1kHz,10Vpp,オフセット電圧−5Vのsin波駆動電圧
(2)周波数1kHz,20Vpp,オフセット電圧−10Vのsin波駆動電圧
Si(110)方位:ヤング率YSi=169GPa、ポアソン比nSi=0.064
PZT: ヤング率YPZT=50GPa、ポアソン比nPZT=0.34
Ir(下部電極):ヤング率YIr=530GPa、ポアソン比nIr=0.26
Pt(上部電極):ヤング率YPt=168GPa、ポアソン比nPT=0.39
2、2K,2C,2M,2Y インクジェット式記録ヘッド(液体吐出装置)
20 基板
30、50 電極
40 圧電体膜
70 インクノズル(液体貯留吐出部材)
71 インク室(液体貯留室)
72 インク吐出口(液体吐出口)
100 インクジェット式記録装置
Claims (7)
- 気相成長法により成膜されてなる圧電体膜であって、
下記一般式Pで表されるペロブスカイト型酸化物にSiが0.2mol%以上0.5mol%未満ドープされてなるペロブスカイト型酸化物を含み、
X線回折法により測定されるパイロクロア相がない圧電体膜。
A1+δ[(ZrxTi1−x)1−aNba]Oy・・・一般式P
但し、式P中、AはPbを主成分とするAサイト元素であり、Zr,Ti,及びNbはBサイト元素である。xは0超1未満、aは0.1以上0.2以下である。δ=0及びy=3が標準であるが、これらの値はペロブスカイト構造を取り得る範囲内で標準値からずれてもよい。
- X線回折法の2θ/θ 測定によって測定されたペロブスカイト(200)のピーク位置がSiノンドープの前記一般式Pで表されるペロブスカイト型酸化物を含む圧電体膜の前記ピーク位置に比べ、高角側にシフトしている請求項1記載の圧電体膜。
- 前記ピーク位置の前記高角側へのシフト量が0°超0.5°以下である請求項2記載の圧電体膜。
- 多数の柱状結晶からなる柱状結晶膜である請求項1〜3いずれか1項記載の圧電体膜。
- 膜厚が1μm以上である請求項1〜4のいずれか1項記載の圧電体膜。
- 請求項1〜5いずれか1項記載の圧電体膜と、該圧電体膜に対して電界を印加する電極とを備えた圧電素子。
- 請求項6に記載の圧電素子と、該圧電素子に一体的にまたは別体として設けられた液体吐出部材とを備え、
該液体吐出部材は、液体が貯留される液体貯留室と、該液体貯留室から外部に前記液体が吐出される液体吐出口とを有するものである液体吐出装置。
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