US2008308762A1PendingUtilityA1

Piezoelectric laminate, surface acoustic wave device, thin-film piezoelectric resonator, and piezoelectric actuator

Assignee: SEIKO EPSON CORPPriority: Dec 6, 2005Filed: Jul 18, 2008Published: Dec 18, 2008

Est. expiryDec 6, 2025(expired)· nominal 20-yr term from priority

Inventors:Mayumi Ueno Takamitsu Higuchi Takeshi Kijima

H10N 30/8542H03H 9/02031H03H 9/02574H03H 9/64H03H 9/25B41J 2/14201H03H 9/145H10N 30/078H10N 30/708

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References

Claims

Abstract

A piezoelectric laminate including a base and a first piezoelectric layer formed above the base and including potassium sodium niobate. The first piezoelectric layer is shown by a compositional formula (K a Na 1-a ) x NbO 3 , “a” and “x” in the compositional formula being respectively 0.1<a<1 and 1≦x≦1.2.

Claims

exact text as granted — not AI-modified

1 . A piezoelectric film comprising (K a Na 1-a ) x NbO 3 , wherein “a” is 0.1&lt;a&lt;1 and “x” is 1≦x≦1.2. 
   
   
       2 . The piezoelectric film as defined in  claim 1 ,
 wherein “x” is 1&lt;x≦1.1.   
   
   
       3 . The piezoelectric film according to  claim 1 , wherein “a” is 0.2≦a≦0.7. 
   
   
       4 . The piezoelectric film according to  claim 2 , wherein “a” is 0.2≦a≦0.7. 
   
   
       5 . The piezoelectric film according to  claim 1 , wherein (K a Na 1-a ) x NbO 3  includes pseudocubic (100) orientation. 
   
   
       6 . The piezoelectric film according to  claim 2 , wherein (K a Na 1-a ) x NbO 3  includes pseudocubic (100) orientation. 
   
   
       7 . The piezoelectric film according to  claim 3 , wherein (K a Na 1-a ) x NbO 3  includes pseudocubic (100) orientation. 
   
   
       8 . The piezoelectric film according to  claim 4 , wherein (K a Na 1-a ) x NbO 3  includes pseudocubic (100) orientation. 
   
   
       9 . A surface acoustic wave device comprising the piezoelectric film as defined in  claim 1 . 
   
   
       10 . A piezoelectric resonator comprising the piezoelectric film as defined in  claim 1 .

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