Patents by Inventor Kirsi Tappura

Kirsi Tappura 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).

  • Publication number: 20220344561
    Abstract: According to an example aspect of the present invention, there is provided a detector comprising an optically absorbing membrane suspended over a cavity between the membrane and a substrate, the substrate comprised in the detector, and a thermoelectric transducer attaching the optically absorbing membrane over the cavity, wherein the optically absorbing membrane forms a contacting element between n-type and p-type thermoelectric elements of the thermoelectric transducer.
    Type: Application
    Filed: September 11, 2020
    Publication date: October 27, 2022
    Inventors: Aapo Varpula, Jonna Tiira, Kirsi Tappura, Grigoras Kestutis, Mika Prunnila
  • Patent number: 11402272
    Abstract: An absorber structure for a thermal detector, the absorber structure including edges defining a basic form, a plurality of first legs of electrically conducting material joined in an electrically conductive manner to form, between the edges of the absorber structure, a grid having openings, the first legs forming at least one continuous connection between the edges of the absorber structure; and a plurality of second legs of electrically conducting material joined in an electrically conductive manner to the first legs, wherein the second legs protrude from the first legs into the openings of the grid and terminate at points of termination located at a distance from adjacent first legs.
    Type: Grant
    Filed: October 30, 2019
    Date of Patent: August 2, 2022
    Assignee: Teknologian tutkimuskeskus VTT Oy
    Inventors: Kirsi Tappura, Aapo Varpula, Mika Prunnila
  • Publication number: 20220155150
    Abstract: According to an aspect, there is provided a structure comprising an absorbing layer for absorbing incident infrared radiation received via a receiving surface of the absorbing layer and a plurality of mushroom-shaped plasmonic elements for enhancing absorption of the incident infrared radiation into the absorbing layer. Said plurality of mushroom-shaped plasmonic elements have sub-wavelength dimensions and sub-wavelength spacings and are arranged along the receiving surface. Each of said plurality of mushroom-shaped plasmonic elements project out relative to the receiving surface.
    Type: Application
    Filed: March 23, 2020
    Publication date: May 19, 2022
    Inventors: Kirsi TAPPURA, Tomi HAATAINEN, Tapio MÄKELÄ
  • Publication number: 20210404880
    Abstract: An absorber structure for a thermal detector, the absorber structure including edges defining a basic form, a plurality of first legs of electrically conducting material joined in an electrically conductive manner to form, between the edges of the absorber structure, a grid having openings, the first legs forming at least one continuous connection between the edges of the absorber structure; and a plurality of second legs of electrically conducting material joined in an electrically conductive manner to the first legs, wherein the second legs protrude from the first legs into the openings of the grid and terminate at points of termination located at a distance from adjacent first legs.
    Type: Application
    Filed: October 30, 2019
    Publication date: December 30, 2021
    Applicant: Teknologian tutkimuskeskus VTT Oy
    Inventors: Kirsi TAPPURA, Aapo VARPULA, Mika PRUNNILA
  • Patent number: 10018563
    Abstract: A sample plate (1) and an analyzing method, wherein the sample plate (1) comprises a substrate (2), at least one sensor site (5) on a first surface (3) of the substrate (2) and at least one optical element (6) on a second surface (4) of the substrate (2). The sample plate (1) is further provided with a waveguide (7) on the second surface (4) for guiding an excitation signal to interact with the at least one sensor site (5). The method comprises bringing the sample in contact with at least one sensor site (5), exciting the sensor site (5) in order to obtain an emitted signal, and selectively collecting the emitted signal by means of at least one optical element (6) and utilizing a supercritical angle fluorescence method; and detecting the collected emitted signals by a detector. In the method, the sensor site (5) is excited by means of an evanescent field generated by the excitation signal propagating in a waveguide (7).
    Type: Grant
    Filed: February 27, 2014
    Date of Patent: July 10, 2018
    Assignee: Teknologian tutkimuskeskus VTT Oy
    Inventors: Kirsi Tappura, Hannu Välimäki
  • Publication number: 20160011112
    Abstract: A sample plate (1) and an analysing method, wherein the sample plate (1) comprises a substrate (2), at least one sensor site (5) on a first surface (3) of the substrate (2) and at least one optical element (6) on a second surface (4) of the substrate (2). The sample plate (1) is further provided with a waveguide (7) on the second surface (4) for guiding an excitation signal to interact with the at least one sensor site (5). The method comprises bringing the sample in contact with at least one sensor site (5), exciting the sensor site (5) in order to obtain an emitted signal, and selectively collecting the emitted signal by means of at least one optical element (6) and utilizing a supercritical angle fluorescence method; and detecting the collected emitted signals by a detector. In the method, the sensor site (5) is excited by means of an evanescent field generated by the excitation signal propagating in a waveguide (7).
    Type: Application
    Filed: February 27, 2014
    Publication date: January 14, 2016
    Inventors: Kirsi Tappura, Hannu Välimäki
  • Patent number: 8136403
    Abstract: The present invention relates to a micromechanical sensor for analyzing liquid samples and an array of such sensors. The invention also concerns a method for sensing liquid samples and the use of longitudinal bulk acoustic waves for analyzing liquid phase samples micromechanically. The sensor comprises a body and a planar wave guide portion spaced from the body. At least one electro-mechanical transducer element are used for excitation of longitudinal bulk acoustic waves to the wave guide portion in response to electrical actuation and for converting acoustic waves into electrical signals. The wave guide portion is provided with a sample-receiving zone onto which the sample can be introduced. By means of the invention, the sensitivity of micromechanical liquid sensors can be improved.
    Type: Grant
    Filed: July 4, 2006
    Date of Patent: March 20, 2012
    Assignee: Valtion Teknillinen Tutkimuskeskus
    Inventors: Heikki Seppa, Kirsi Tappura, Jussi Tuppurainen, Tomi Mattila, Ari Alastalo, Hannu Helle, Aarne Oja
  • Publication number: 20090277271
    Abstract: The present invention relates to a micromechanical sensor for analyzing liquid samples and an array of such sensors. The invention also concerns a method for sensing liquid samples and the use of longitudinal bulk acoustic waves for analyzing liquid phase samples micromechanically. The sensor comprises a body and a planar wave guide portion spaced from the body. At least one electro-mechanical transducer element are used for excitation of longitudinal bulk acoustic waves to the wave guide portion in response to electrical actuation and for converting acoustic waves into electrical signals. The wave guide portion is provided with a sample-receiving zone onto which the sample can be introduced. By means of the invention, the sensitivity of micromechanical liquid sensors can be improved.
    Type: Application
    Filed: July 4, 2006
    Publication date: November 12, 2009
    Applicant: VALTION TEKNILLINEN TUTKIMUSKESKUS
    Inventors: Heikki Seppa, Kirsi Tappura, Jussi Tuppurainen, Tomi Mattila, Ari Alastalo, Hannu Helle, Aarne Oja
  • Patent number: 6424843
    Abstract: The telecommunication device comprises a speaker (32) and a microphone (33) in order to use the telecommunication device as a telephone. Further it comprises a camera (91, 1101) having a certain photographing direction, and a display (38, 1102) having a certain displaying direction, in order to use the telecommunication device as an image generating means. The photographing direction is substantially different from the displaying direction.
    Type: Grant
    Filed: April 5, 2000
    Date of Patent: July 23, 2002
    Assignee: Nokia Oyj
    Inventors: Ilpo Reitmaa, Hannu Nieminen, Jyrki Kimmel, Kirsi Tappura, Mika V{overscore (a)}is{overscore (a)}nen, Timo Kolehmainen