Title:
音響反射器を備える圧電性共振器装置
Document Type and Number:
Japanese Patent JP4037825
Kind Code:
B2
Abstract:
A resonator apparatus has a piezoelectric resonator as well as an acoustic reflector which has a layer having a high acoustic impedance and a layer having a low acoustic impedance. The thickness of one layer is set different from a quarter of the wavelength in this layer at the operating frequency due to technological limitations in the manufacturing of this layer, and the thickness of the other layer is set dependent from the one layer, such that a predetermined minimum quality of the acoustic reflector is attained.
Inventors:
Aigner, Norbert
Erbrecht, Lüder
Marc Steiner, Stephan
Time, Hans Jörg
Erbrecht, Lüder
Marc Steiner, Stephan
Time, Hans Jörg
Application Number:
JP2003518042A
Publication Date:
January 23, 2008
Filing Date:
June 04, 2002
Export Citation:
Assignee:
Infineon Technologies AG
International Classes:
H01L41/09; H01L41/187; H03H9/17; H03H9/02
Domestic Patent References:
| JP10270979A | ||||
| JP5167386A | ||||
| JP2002041052A | ||||
| JP2001177365A | ||||
| JP2000341077A | ||||
| JP9199978A |
Foreign References:
| US5821833 |
Attorney, Agent or Firm:
Kenzo Hara International Patent Office
Kenzo Hara
Ryuichi Kijima
Ichiro Kaneko
Kenzo Hara
Ryuichi Kijima
Ichiro Kaneko