(19)
(11) EP 0 346 935 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
03.04.1991 Bulletin 1991/14

(43) Date of publication A2:
20.12.1989 Bulletin 1989/51

(21) Application number: 89111010.8

(22) Date of filing: 16.06.1989
(51) International Patent Classification (IPC)4: B41J 2/16
(84) Designated Contracting States:
DE ES FR GB IT

(30) Priority: 17.06.1988 JP 148173/88

(71) Applicant: CANON KABUSHIKI KAISHA
Tokyo (JP)

(72) Inventor:
  • Takahashi, Hiroto
    Yokohama-shi Kanagawa-ken (JP)

(74) Representative: Bühling, Gerhard, Dipl.-Chem. et al
Patentanwaltsbüro Tiedtke-Bühling-Kinne & Partner Bavariaring 4
80336 München
80336 München (DE)


(56) References cited: : 
   
       


    (54) Ink jet recording head and process for preparing a substrate for a recording head


    (57) An ink jet recording head comprises a discharging opening (101) for liquid discharge and an electricity-heat convertor (104A). The electricity-heat convertor has a region formed by oxidation of at least part of an electro-conductive material, and the region is adpated to generate heat.






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