Patents by Inventor Rei Kimachi

Rei Kimachi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Filter chip and filter device
    Patent number: 7145417
    Abstract: A filter chip includes multiple series-arm resonators arranged in series arms of a ladder arrangement, and multiple parallel-arm resonators arranged in parallel arms of the ladder arrangement. A common line is connected to first electrodes of at least two parallel-arm resonators among the multiple parallel-arm resonators. Second electrodes of said at least two parallel-arm resonators are connected to associated series-arm resonators among the multiple series-arm resonators.
    Type: Grant
    Filed: March 27, 2003
    Date of Patent: December 5, 2006
    Assignees: Fujitsu Limited, Fujitsu Media Devices Limited
    Inventors: Rei Kimachi, Tokihiro Nishihara, Takeshi Sakashita, Tsuyoshi Yokoyama, Tsutomu Miyashita
  • Thin-film piezoelectric resonator, band-pass filter and method of making thin-film piezoelectric resonator
    Publication number: 20040185594
    Abstract: A thin-film piezo-resonator includes a silicon substrate and a resonator assembly. The substrate is formed with a cavity or through-hole which is opened in the upper and the lower surfaces of the substrate. The resonator assembly, disposed at a location corresponding to the cavity, is composed of a first electrode contacting the upper surface of the substrate, a piezoelectric layer formed on the first electrode and a second electrode formed on the piezoelectric layer. The cavity has a side surface extending in a substantially perpendicular direction to the first surface.
    Type: Application
    Filed: January 27, 2004
    Publication date: September 23, 2004
    Applicants: Fujitsu Limited, Fujitsu Media Devices Limited
    Inventors: Tokihiro Nishihara, Takeshi Sakashita, Rei Kimachi, Tsuyoshi Yokoyama, Tsutomu Miyashita
  • Thin-film piezoelectric resonator, band-pass filter and method of making thin-film piezoelectric resonator
    Patent number: 6734763
    Abstract: A thin-film piezo-resonator includes a silicon substrate and a resonator assembly. The substrate is formed with a cavity or through-hole which is opened in the upper and the lower surfaces of the substrate. The resonator assembly, disposed at a location corresponding to the cavity, is composed of a first electrode contacting the upper surface of the substrate, a piezoelectric layer formed on the first electrode and a second electrode formed on the piezoelectric layer. The cavity has a side surface extending in a substantially perpendicular direction to the first surface.
    Type: Grant
    Filed: April 8, 2002
    Date of Patent: May 11, 2004
    Assignees: Fujitsu Limited, Fujitsu Media Devices Limited
    Inventors: Tokihiro Nishihara, Takeshi Sakashita, Rei Kimachi, Tsuyoshi Yokoyama, Tsutomu Miyashita
  • Filter chip and filter device
    Publication number: 20030186673
    Abstract: A filter chip includes multiple series-arm resonators arranged in series arms of a ladder arrangement, and multiple parallel-arm resonators arranged in parallel arms of the ladder arrangement. A common line is connected to first electrodes of at least two parallel-arm resonators among the multiple parallel-arm resonators. Second electrodes of said at least two parallel-arm resonators are connected to associated series-arm resonators among the multiple series-arm resonators.
    Type: Application
    Filed: March 27, 2003
    Publication date: October 2, 2003
    Applicants: FUJITSU MEDIA DEVICES LIMITED, FUJITSU LIMITED
    Inventors: Rei Kimachi, Tokihiro Nishihara, Takeshi Sakashita, Tsuyoshi Yokoyama, Tsutomu Miyashita
  • Thin-film piezoelectric resonator, band-pass filter and method of making thin-film piezoelectric resonator
    Publication number: 20030107456
    Abstract: A thin-film piezo-resonator includes a silicon substrate and a resonator assembly. The substrate is formed with a cavity or through-hole which is opened in the upper and the lower surfaces of the substrate. The resonator assembly, disposed at a location corresponding to the cavity, is composed of a first electrode contacting the upper surface of the substrate, a piezoelectric layer formed on the first electrode and a second electrode formed on the piezoelectric layer. The cavity has a side surface extending in a substantially perpendicular direction to the first surface.
    Type: Application
    Filed: April 8, 2002
    Publication date: June 12, 2003
    Applicants: Fujitsu Limited, Fujitsu Media Devices Limited
    Inventors: Tokihiro Nishihara, Takeshi Sakashita, Rei Kimachi, Tsuyoshi Yokoyama, Tsutomu Miyashita