(19)
(11) EP 1 040 923 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
08.11.2000 Bulletin 2000/45

(43) Date of publication A2:
04.10.2000 Bulletin 2000/40

(21) Application number: 00106070.6

(22) Date of filing: 29.03.2000
(51) International Patent Classification (IPC)7: B41J 2/14, B41J 2/16
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 29.03.1999 JP 8578899
17.03.2000 JP 2000076269

(71) Applicant: SEIKO EPSON CORPORATION
Shinjuku-ku, Tokyo 163-0811 (JP)

(72) Inventors:
  • Kitahara, Tsuyoshi
    Suwa-shi, Nagano 392-8502 (JP)
  • Arai, Hiroshi
    Suwa-shi, Nagano 392-8502 (JP)

(74) Representative: HOFFMANN - EITLE 
Patent- und Rechtsanwälte Arabellastrasse 4
81925 München
81925 München (DE)

   


(54) Inkjet recording head, piezoelectric vibration element unit, and method of manufacturing the piezoelectric vibration element unit


(57) A dummy piezoelectric element (7) is disposed at least at one of the ends of an array of piezoelectric vibration elements. A region not including internal electrodes is provided in the vicinity of the outer side surface of the dummy piezoelectric vibration element 7 to be formed. When the outer side surface of the dummy piezoelectric element 7 is cut, a shift of a cutting line from a correct cutting line, which is due to high hardness of the internal electrodes, is minimized.






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