Patents by Inventor Jyrki Kiihamäki
Jyrki Kiihamäki 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).
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Publication number: 20190112181Abstract: The invention provides a micromechanical device comprising a support structure and a deflecting element connected to the support structure, wherein the deflecting element comprises at least one deformable member adapted to deform extensionally, flexurally or torsionally with respect to a deformation axis for allowing deflection of the deflecting element with respect to the support structure. Further, there are means for statically deflecting the deflecting element or detecting the magnitude of static deflection of the deflecting element. According to the invention, the deformable member is made of silicon doped with an n-type doping agent to a doping concentration of at least 1.1*1020 cm?3. The invention allows for manufacturing micromechanical devices whose mechanical operation is not affected by prevailing temperature conditions.Type: ApplicationFiled: March 31, 2017Publication date: April 18, 2019Inventors: Antti JAAKKOLA, Tuomas PENSALA, Mika PRUNNILA, Panu PEKKO, Jyrki KIIHAMÄKI, Aarne OJA
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Patent number: 9462969Abstract: The application relates to microfluidic needles and their manufacturing methods. The microfluidic needle comprises an interface portion containing at least one fluid communication channel, an elongated needle portion (40) projecting away from the interface portion (44), the needle portion having a tip and sidewalls connecting the tip to the interface portion, and at least two microfluidic channels (43 A-B) within the needle portion in fluidic connection with the at least one communication channel, the microfluidic channels being at least partly oriented parallel to the elongated needle portion. According to the application, the microfluidic channels exit the needle portion at the sidewalls of the needle portion. The needle may be fabricated by ALD-assisted silicon micromachining. The needle can be used for injection and/or sampling fluids to/from tissue or individual cells.Type: GrantFiled: April 20, 2010Date of Patent: October 11, 2016Assignee: Teknologian tutkimuskeskus VTT OyInventors: Feng Gao, Jyrki Kiihamäki, Ari Hokkanen, Päivi Heimala
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Patent number: 8786166Abstract: The invention relates to a microelectromechanical resonators and a method of manufacturing thereof. The resonator comprises at least two resonator elements made from semiconductor material, the resonator elements being arranged laterally with respect to each other as an array, at least one transducer element coupled to said resonator elements and capable of exciting a resonance mode to the resonator elements. According to the invention, said at least one transducer element is a piezoelectric transducer element arranged laterally with respect to the at least two resonator elements between the at least two resonator elements and adapted to excite to the resonator elements as said resonance mode a resonance mode whose resonance frequency is dependent essentially only on the c44 elastic parameter of the elastic modulus of the material of the resonator elements. By means of the invention, electrostatic actuation and problems associated therewith can be avoided and accurate resonators can be manufactured.Type: GrantFiled: August 12, 2011Date of Patent: July 22, 2014Assignee: Teknologian Tutkimuskeskus VTTInventors: Antti Jaakkola, Tuomas Pensala, Jyrki Kiihamäki
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Patent number: 8236694Abstract: The present invention relates to a method for manufacturing an acceleration sensor. In the method, thin SOI-wafer structures are used, in which grooves are etched, the walls of which are oxidized. A thick layer of electrode material, covering all other material, is grown on top of the structures, after which the surface is ground and polished chemo-mechanically, thin release holes are etched in the structure, structural patterns are formed, and finally etching using a hydrofluoric acid solution is performed to release the structures intended to move and to open a capacitive gap.Type: GrantFiled: September 17, 2010Date of Patent: August 7, 2012Assignee: Valtion Teknillinen TutkimuskeskusInventors: Jyrki Kiihamäki, Hannu Kattelus
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Publication number: 20120058506Abstract: The application relates to microfluidic needles and their manufacturing methods. The microfluidic needle comprises an interface portion containing at least one fluid communication channel, an elongated needle portion (40) projecting away from the interface portion (44), the needle portion having a tip and sidewalls connecting the tip to the interface portion, and at least two microfluidic channels (43 A-B) within the needle portion in fluidic connection with the at least one communication channel, the microfluidic channels being at least partly oriented parallel to the elongated needle portion. According to the application, the microfluidic channels exit the needle portion at the sidewalls of the needle portion. The needle may be fabricated by ALD-assisted silicon micromachining. The needle can be used for injection and/or sampling fluids to/from tissue or individual cells.Type: ApplicationFiled: April 20, 2010Publication date: March 8, 2012Applicant: TEKNOLOGIAN TUTKIMUSKESKUS VTTInventors: Feng Gao, Jyrki Kiihamäki, Ari Hokkanen, Päivi Heimala
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Publication number: 20120038431Abstract: The invention relates to a microelectromechanical resonators and a method of manufacturing thereof. The resonator comprises at least two resonator elements made from semiconductor material, the resonator elements being arranged laterally with respect to each other as an array, at least one transducer element coupled to said resonator elements and capable of exciting a resonance mode to the resonator elements. According to the invention, said at least one transducer element is a piezoelectric transducer element arranged laterally with respect to the at least two resonator elements between the at least two resonator elements and adapted to excite to the resonator elements as said resonance mode a resonance mode whose resonance frequency is dependent essentially only on the c44 elastic parameter of the elastic modulus of the material of the resonator elements. By means of the invention, electrostatic actuation and problems associated therewith can be avoided and accurate resonators can be manufactured.Type: ApplicationFiled: August 12, 2011Publication date: February 16, 2012Applicant: TEKNOLOGIAN TUTKIMUSKESKUS VTTInventors: Antti JAAKKOLA, Tuomas PENSALA, Jyrki KIIHAMÄKI
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Patent number: 7882741Abstract: The present invention relates to a method for manufacturing an acceleration sensor. In the method, thin SOI-wafer structures are used, in which grooves are etched, the walls of which are oxidized. A thick layer of electrode material, covering all other material, is grown on top of the structures, after which the surface is ground and polished chemo-mechanically, thin release holes are etched in the structure, structural patterns are formed, and finally etching using a hydrofluoric acid solution is performed to release the structures intended to move and to open a capacitive gap.Type: GrantFiled: June 2, 2006Date of Patent: February 8, 2011Assignee: Valtion Teknillinen TutkimuskeskusInventors: Jyrki Kiihamäki, Hannu Kattelus
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Patent number: 6930366Abstract: The present publication discloses a method for forming cavities in prefabricated silicon wafers comprising a first silicon layer (1), a second monocrystalline silicon layer, or a so-called structural layer (3), oriented substantially parallel with said first silicon layer (1) and an insulating layer (2) situated between said first and second layers (1, 3). According to the method, in at least one of the conducting silicon layers (1, 3) are fabricated windows (4) extending through the thickness of the layer, and cavities are etched in the insulating layer (2) by means of etchants passed to the layer via said fabricated windows (4).Type: GrantFiled: September 27, 2002Date of Patent: August 16, 2005Assignee: Valtion Teknillinen TutkimuskeskusInventor: Jyrki Kiihamäki