(19)
(11) EP 0 869 609 B8

(12) CORRECTED EUROPEAN PATENT SPECIFICATION
Note: Bibliography reflects the latest situation

(15) Correction information:
Corrected version no 1 (W1 B1)

(48) Corrigendum issued on:
02.01.2004 Bulletin 2004/01

(45) Mention of the grant of the patent:
06.08.2003 Bulletin 2003/32

(21) Application number: 97944141.7

(22) Date of filing: 16.10.1997
(51) International Patent Classification (IPC)7H03H 9/145, H03H 9/25
(86) International application number:
PCT/JP1997/003737
(87) International publication number:
WO 1998/018204 (30.04.1998 Gazette 1998/17)

(54)

SURFACE ACOUSTIC WAVE DEVICE

AKUSTISCHE OBERFLÄCHENWELLENANORDNUNG

DISPOSITIF DE TRAITEMENT DES ONDES ACOUSTIQUES DE SURFACE


(84) Designated Contracting States:
DE FR

(30) Priority: 18.10.1996 JP 29744096
12.12.1996 JP 35229596
12.12.1996 JP 35229696
12.12.1996 JP 35229796

(43) Date of publication of application:
07.10.1998 Bulletin 1998/41

(73) Proprietor: TDK Corporation
Chuo-ku, Tokyo 103-0027 (JP)

(72) Inventors:
  • INOUE, Kenji
    Chuo-ku, Tokyo 103 (JP)
  • SATO, Katsuo
    Chuo-ku, Tokyo 103 (JP)

(74) Representative: Sarup, David Alexander et al
Raworth, Moss & Cook, Raworth House, 36 Sydenham Road
Croydon, Surrey CRO 2EF
Croydon, Surrey CRO 2EF (GB)


(56) References cited: : 
JP-A- 2 290 315
JP-A- 62 040 812
JP-B- 2 007 525
JP-A- 61 269 410
JP-A- 62 078 904
JP-B- 2 009 485
   
  • IEEE ULTRASONICS SYMPOSIUM, No. 1, 1995, I.B. YAKOVKIN, R.M. TAZIEV, A.S. KOZLOV, "Numerical and Experimental Investigation Saw in Langasite", pages 389-392.
  • IEEE ULTRASONICS SYMPOSIUM, No. 1, 1995, K.S. ALEKSANDROV, B.P. SOROKIN, P.P. TURCHIN, S.I. BURKOV, D.A. GLUSHKOV, A.A. KARPOVICH, "Effects of Static Electric Field and of Mechanical Pressure on Surface Acoustic Waves Propagation in La3Ga5Si014 Piezoelectric Single Crystals", pages 409-412.
  • IEEE ULTRASONICS SYMPOSIUM, No. 1, 1992, J.G. GUALTIERI, J.A. KONINSKI and A. BALLATO, "Piezoelectric Materials of Saw Application", pages 403-412.
  • IEEE INT'L FREQUENCY CONTROL SYMPOSIUM, No. 1, 1993, I.M. SILVESTROVA, V.V. BEZDELKIN, P.A. SENYUSHENKOV, Yu.V. PISAREVSKY, "Present Stage of La3Ga5SiO14 Research", pages 348-350.
  • IEEE INT'L FREQUENCY CONTROL SYMPOSIUM, No. 1, 1993, A.N. GOTALSKAYA, D.I. DREZIN, V.V. BEZDELKIN, V.N. STASSEVICH, "Pecularities of Technology, Physical Properties and Applications of New Piezoelectric Material Langasite (La3Ga5SiO14)", pages 339-347.
  • IEEE INT'L FREQUENCY CONTROL SYMPOSIUM, No. 1, 1994, M.F. DUBOVIK, I.A. ANDREYEV, Yu.S. SHMALY, "Langasite(La3Ga5SiO14) an Optical Piezoelectric: Growth and Properties", pages 43-47.
   
Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).