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1. (WO2004095699) ELASTIC BOUNDARY WAVE DEVICE
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2004/095699 International Application No.: PCT/JP2004/000762
Publication Date: 04.11.2004 International Filing Date: 28.01.2004
IPC:
H03H 9/145 (2006.01) ,H03H 9/25 (2006.01)
H ELECTRICITY
03
BASIC ELECTRONIC CIRCUITRY
H
IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
9
Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
02
Details
125
Driving means, e.g. electrodes, coils
145
for networks using surface acoustic waves
H ELECTRICITY
03
BASIC ELECTRONIC CIRCUITRY
H
IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
9
Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
25
Constructional features of resonators using surface acoustic waves
Applicants: KANDO, Hajime[JP/JP]; JP (UsOnly)
MURATA MANUFACTURING CO., LTD.[JP/JP]; 10-1, Higashikotari 1-chome Nagaokakyo-shi, Kyoto 617-8555, JP (AllExceptUS)
Inventors: KANDO, Hajime; JP
Agent: MIYAZAKI, Chikara; Nishimura Bldg. 6-5, Tanimachi 1-chome Chuo-ku, Osaka-shi Osaka 5400012, JP
Priority Data:
2003-11459218.04.2003JP
Title (EN) ELASTIC BOUNDARY WAVE DEVICE
(FR) DISPOSITIF A ONDE LIMITE ELASTIQUE
(JA) 弾性境界波装置
Abstract:
(EN) An elastic boundary wave device ensuring good resonance characteristics and filter characteristics by effectively suppressing a spurious state caused by an elastic wave confined between a boundary surface on which an elastic boundary wave propagates and the surface of a medium layer. On the boundary between a first medium layer, i.e. an LiNbO3 substrate, having a relatively high sound velocity and a second medium layer, i.e. an SiO2 film, having a relatively low sound velocity, an IDT as an electroacoustic transducer and a reflector are arranged, and recesses and/or protrusions are provided on the upper surface of the SiO2 film by forming a plurality of grooves, thereby completing an elastic boundary wave device.
(FR) L'invention concerne un dispositif à onde limite élastique qui présente de bonnes caractéristiques de résonance et de filtrage, grâce à la suppression efficace d'un état parasite produit par une onde élastique confinée entre une surface limite, sur laquelle l'onde limite élastique se propage, et la surface d'une couche support. A la limite entre une première couche support, c.-à-d. un substrat de LiNbO3, qui présente une vitesse de propagation sonore relativement élevée, et une deuxième couche support, c.-à-d. un film de SiO2, qui présente une vitesse de propagation sonore relativement faible, un IDT comme transducteur électroacoustique et un réflecteur sont prévus ; et des creux et/ou éléments saillants sont prévus sur la surface supérieure du film de SiO2 par la formation d'une pluralité de rainures, ce qui permet de produire un dispositif à onde limite élastique.
(JA)  弾性境界波が伝搬する境界面と媒質層の表面との間で閉じ込められる弾性波に起因するスプリアスを効果的に抑圧することができ、良好な共振特性やフィルタ特性を得ることを可能とする弾性境界波装置を提供する。相対的に音速が速い第1の媒質層としてのLiNbO3基板と、相対的に音速が遅い第2の媒質層としてのSiO2膜との境界に、電気音響変換器としてのIDTと、反射器とが配置されており、SiO2膜の上面に、複数本の溝が形成されて凹部及び/または凸部が設けられている、弾性境界波装置。
front page image
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LS, MW, MZ, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (EPO) (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IT, LU, MC, NL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)