(19)
(11) EP 0 594 120 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
26.07.1995 Bulletin 1995/30

(43) Date of publication A2:
27.04.1994 Bulletin 1994/17

(21) Application number: 93116867.8

(22) Date of filing: 19.10.1993
(51) International Patent Classification (IPC)5: H01C 7/10, H01C 17/30
(84) Designated Contracting States:
DE FR GB

(30) Priority: 20.10.1992 JP 281469/92
12.11.1992 JP 301965/92

(71) Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
Kadoma-shi, Osaka-fu, 571 (JP)

(72) Inventors:
  • Iga, Atsushi
    Takatsuki-shi, Osaka (JP)
  • Ito, Masahiro
    Hirakata-shi, Osaka (JP)
  • Okinaka, Hideyuki
    Toyonaka-shi, Osaka (JP)

(74) Representative: Marx, Lothar, Dr. 
Patentanwälte Schwabe, Sandmair, Marx Stuntzstrasse 16
81677 München
81677 München (DE)


(56) References cited: : 
   
       


    (54) A method for producing a ZnO Varistor


    (57) A method for producing a ZnO-based varistor includes the steps of: heat-treating a mixture of TiO₂ powders and Bi₂O₃ powders so as to prepare composite powders; and adding the composite powders to ZnO varistor materials.






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