(19)
(11) EP 1 005 987 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
02.11.2000 Bulletin 2000/44

(43) Date of publication A2:
07.06.2000 Bulletin 2000/23

(21) Application number: 99123858.5

(22) Date of filing: 01.12.1999
(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: 04.12.1998 JP 34581698

(71) Applicant: KONICA CORPORATION
Tokyo (JP)

(72) Inventors:
  • Nishi, Shinichi, c/o Konica Corporation
    Hino-shi, Tokyo (JP)
  • Komatsu, Katsuaki, c/o Konica Corporation
    Hino-shi, Tokyo (JP)
  • Yamaguchi, Takao, c/o Konica Corporation
    Hino-shi, Tokyo (JP)
  • Yamauchi, Kunihiro, c/o Konica Corporation
    Hino-shi, Tokyo (JP)
  • Takeuchi, Yoshio, c/o Konica Corporation
    Hino-shi, Tokyo (JP)
  • Ito, Kunio, c/o Konica Corporation
    Hino-shi, Tokyo (JP)
  • Nomori, Hiroyuki, c/o Konica Corporation
    Hino-shi, Tokyo (JP)
  • Namiki, Takemasa, c/o Konica Corporation
    Hino-shi, Tokyo (JP)
  • Kikugawa, Shozo
    Hino-shi, Tokyo (JP)

(74) Representative: Henkel, Feiler, Hänzel 
Möhlstrasse 37
81675 München
81675 München (DE)

   


(54) Ink jet head and method of manufacturing ink jet head


(57) An ink jet head (101) to jet ink from a nozzle hole (108) by applying an electric voltage to an electrode so as to deform a shape of a space forming an ink chamber, comprises two piezoelectric base plates (103) given polarization; two non-piezoelectric base plates (104), wherein the ink chamber (102) is formed by being enclosed by the two piezoelectric base plates (103) facing each other and the two non-piezoelectric base plates (104) facing each other; each of the two piezoelectric base plates (103) comprising at least two lamination layers made of a piezoelectric material (103a,103b), wherein the two lamination layers are laminated such that the laminated surface is substantially parallel to the non-piezoelectric base plates (104) and polarizing directions of the two lamination layers are opposite to each other; and electrodes (105,106) provided on surfaces of the piezoelectric base plates (103) and the non-piezoelectric base plates (104), wherein the surfaces face the ink chamber (102).






Search report