(19)
(11) EP 1 076 345 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
07.03.2001 Bulletin 2001/10

(43) Date of publication A2:
14.02.2001 Bulletin 2001/07

(21) Application number: 00402278.6

(22) Date of filing: 11.08.2000
(51) International Patent Classification (IPC)7H01F 41/04, H01F 17/00, H01F 21/00
(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: 12.08.1999 JP 22887999

(71) Applicant: Murata Manufacturing Co., Ltd.
Nagaokakyo-shi Kyoto-fu 617-8555 (JP)

(72) Inventors:
  • Iida, Naoki, Murata Manufac. Co., Ltd.
    Nagaokakyo-shi, Kyoto-fu 617-8555 (JP)
  • Kawaguchi, Masahiko, Murata Manufac. Co., Ltd.
    Nagaokakyo-shi, Kyoto-fu 617-8555 (JP)

(74) Representative: Thévenet, Jean-Bruno et al
Cabinet Beau de Loménie 158, rue de l'Université
75340 Paris Cédex 07
75340 Paris Cédex 07 (FR)

   


(54) Variable inductance element


(57) A meandering inductor pattern (4) is formed on the upper surface of an insulating substrate (1). The inductor pattern (4) is formed by irradiating a conductor pattern (2) with a laser beam to form U-shaped trimming grooves (10) in the conductor pattern (2) in such a manner that two island-shape rectangular sections (3) are separated from the conductor pattern.







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