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1. WO2002045262 - ACOUSTIC WAVE DEVICE

Publication Number WO/2002/045262
Publication Date 06.06.2002
International Application No. PCT/JP2000/008427
International Filing Date 29.11.2000
IPC
H03H 3/08 2006.01
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
HIMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
3Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators
007for the manufacture of electromechanical resonators or networks
08for the manufacture of resonators or networks using surface acoustic waves
H03H 9/02 2006.01
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
HIMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
9Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
02Details
H03H 9/10 2006.01
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
HIMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
9Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
02Details
05Holders or supports
10Mounting in enclosures
CPC
H03H 3/08
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
HIMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
3Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators
007for the manufacture of electromechanical resonators or networks
08for the manufacture of resonators or networks using surface acoustic waves
H03H 9/0222
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
HIMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
9Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
02Details
0222of interface-acoustic, boundary, pseudo-acoustic or Stonely wave devices
H03H 9/02984
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
HIMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
9Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
02Details
02535of surface acoustic wave devices
02984Protection measures against damaging
Applicants
  • MITSUBISHI DENKI KABUSHIKI KAISHA [JP]/[JP] (AllExceptUS)
  • YOSHIDA, Kenji [JP]/[JP] (UsOnly)
  • MISU, Koichiro [JP]/[JP] (UsOnly)
  • IBATA, Koji [JP]/[JP] (UsOnly)
  • SAKAI, Atsushi [JP]/[JP] (UsOnly)
  • NAGATSUKA, Tsutomu [JP]/[JP] (UsOnly)
  • YAMADA, Akira [JP]/[JP] (UsOnly)
  • MAEDA, Chisako [JP]/[JP] (UsOnly)
Inventors
  • YOSHIDA, Kenji
  • MISU, Koichiro
  • IBATA, Koji
  • SAKAI, Atsushi
  • NAGATSUKA, Tsutomu
  • YAMADA, Akira
  • MAEDA, Chisako
Agents
  • SOGA, Michiteru
Priority Data
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) ACOUSTIC WAVE DEVICE
(FR) DISPOSITIF A ONDES SONORES
Abstract
(EN)
An acoustic wave device includes stripe-shaped electrodes (4, 5) of conductor on a piezoelectric substrate (1). Dielectric thin film (8) with a base of oxidation silicon is deposited on the electrodes (4, 5) and a reflector (9) of appropriately defined thickness. The dielectric thin film (8) of appropriate thickness protects the electrodes from fine metal particles, thus eliminating the need of airtight package sealing for preventing external influences.
(FR)
L'invention porte sur un dispositif à ondes sonores comportant des électrodes (4, 5) conductrices en bande disposées sur un substrat piézo-électrique (1) et sur lesquelles on forme un film mince (8) diélectrique à base de silicium oxydé, puis un réflecteur (9) d'épaisseur convenable. Le film mince (8) diélectrique protège les électrodes des fines particules de métal, ce qui rend inutile la présence de joints étanches à l'air protégeant des influences extérieures.
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