Patents by Inventor Cornel P. Cobianu
Cornel P. Cobianu 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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Patent number: 9074983Abstract: The design and deposition of a sensing layer for room temperature SAW/BAW chemical sensors utilizing macrocyclic compounds in accordance with supra-molecular chemistry principles. The gas to be sensed is attached to the organic sensing film thus changing its visco-elastic properties and creating a mass increase of the film deposited on the surface of SAW/BAW devices. A direct printing method can be used as an additive, mask-less procedure to deposit metallic interdigital transducers and electrodes required for SAW/BAW devices, along with the deposition of a guiding layer and the organic films only on the location required by the sensing SAW/BAW principle of the sensor. Different thermal treatment solutions can be used for the consolidation of the gelly organic films deposited by the direct printing methods.Type: GrantFiled: March 23, 2007Date of Patent: July 7, 2015Assignee: Honeywell International Inc.Inventors: Bogdan Catalin Serban, Viorel V. Avramescu, Cornel P. Cobianu, Ion Georgescu, Nicolae Varachiu
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Patent number: 8980666Abstract: Some embodiments relate to method of fabricating a sensor. The method includes providing a substrate wafer that includes a suspended beam; adding an adhesive layer to the substrate wafer such that the adhesive layer covers portions of the substrate without covering the suspended beam; positioning a cover wafer onto the adhesive layer such that the suspend beam is exposed to ambient air through openings in the cover wafer; and functionalizing the suspended beam by contacting the suspended beam with materials through the opening in the cover wafer.Type: GrantFiled: December 1, 2011Date of Patent: March 17, 2015Assignee: Honeywell Romania s.r.l.Inventor: Cornel P. Cobianu
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Patent number: 8609427Abstract: A sulfur dioxide sensor comprising a first beam having a functionalized sensing surface capable of sensing sulfur dioxide, the first beam capable of producing a first resonant frequency; and a second beam having a functionalized reference surface not capable of sensing sulfur dioxide, the second beam capable of producing a second resonant frequency, wherein differential sensing of sulfur dioxide may be performed, further wherein the first beam is functionalized with a liquid phase of a first polymeric compound and the second beam is functionalized with a liquid phase of a second polymeric compound is provided. In one embodiment, the sensor is a nano-sensor capable of low drift accurately detecting sulfur dioxide levels at the zeptograms level. Methods of making and using a sulfur dioxide sensor are also provided.Type: GrantFiled: December 7, 2010Date of Patent: December 17, 2013Assignee: Honeywell Romania s.r.l.Inventors: Bogdan Catalin Serban, Cornel P. Cobianu, Mihai N. Mihaila, Viorel Georgel Dumitru
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Patent number: 8563319Abstract: A nitrogen dioxide sensor comprising a first beam having a first functionalized sensing surface capable of sensing nitrogen dioxide, the first beam capable of producing a first resonant frequency; and a second beam having a second functionalized reference surface not capable of sensing nitrogen dioxide, the second beam capable of producing a second resonant frequency, wherein differential sensing of nitrogen dioxide may be performed, further wherein the first beam and the second beam are each functionalized with one or more soft bases having comparable viscoelastic properties is provided. In one embodiment, the sensor is a nano-sensor capable of low drift and accurate detection of nitrogen dioxide levels at the zeptogram level. Methods of making and using a nitrogen dioxide sensor are also provided.Type: GrantFiled: December 7, 2010Date of Patent: October 22, 2013Assignee: Honeywell Romania S.R.L.Inventors: Bogdan Catalin Serban, Cornel P. Cobianu, Mihai N. Mihaila, Viorel Georgel Dumitru, Octavian Buiu
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Patent number: 8544314Abstract: A carbon dioxide sensor comprising a first beam that includes a functionalized surface and a second beam that includes a functionalized surface such that reduced-drift differential sensing of carbon dioxide may be performed by monitoring changes in the resonant frequency of the first beam relative to the resonant frequency of second beam.Type: GrantFiled: December 7, 2010Date of Patent: October 1, 2013Assignee: Honeywell Romania S.R.L.Inventors: Bogdan Catalin Serban, Cornel P. Cobianu, Mihai N. Mihaila, Viorel Georgel Dumitru
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Publication number: 20120142135Abstract: Some embodiments relate to method of fabricating a sensor. The method includes providing a substrate wafer that includes a suspended beam; adding an adhesive layer to the substrate wafer such that the adhesive layer covers portions of the substrate without covering the suspended beam; positioning a cover wafer onto the adhesive layer such that the suspend beam is exposed to ambient air through openings in the cover wafer; and functionalizing the suspended beam by contacting the suspended beam with materials through the opening in the cover wafer.Type: ApplicationFiled: December 1, 2011Publication date: June 7, 2012Applicant: HONEYWELL ROMANIA S. R. L.Inventor: Cornel P. COBIANU
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Publication number: 20110143447Abstract: A nitrogen dioxide sensor comprising a first beam having a first functionalized sensing surface capable of sensing nitrogen dioxide, the first beam capable of producing a first resonant frequency; and a second beam having a second functionalized reference surface not capable of sensing nitrogen dioxide, the second beam capable of producing a second resonant frequency, wherein differential sensing of nitrogen dioxide may be performed, further wherein the first beam and the second beam are each functionalized with one or more soft bases having comparable viscoelastic properties is provided. In one embodiment, the sensor is a nano-sensor capable of low drift and accurate detection of nitrogen dioxide levels at the zeptogram level. Methods of making and using a nitrogen dioxide sensor are also provided.Type: ApplicationFiled: December 7, 2010Publication date: June 16, 2011Applicant: Honeywell Romania S.R.L.Inventors: Bogdan Catalin Serban, Cornel P. Cobianu, Mihai N. Mihaila, Viorel Georgel Dumitru, Octavian Buiu
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Publication number: 20110138878Abstract: A carbon dioxide sensor comprising a first beam that includes a functionalized surface and a second beam that includes a functionalized surface such that reduced-drift differential sensing of carbon dioxide may be performed by monitoring changes in the resonant frequency of the first beam relative to the resonant frequency of second beam.Type: ApplicationFiled: December 7, 2010Publication date: June 16, 2011Applicant: Honeywell Romania S.R.L.Inventors: Bogdan Catalin Serban, Cornel P. Cobianu, Mihai N. Mihaila, Viorel Georgel Dumitru
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Publication number: 20110143448Abstract: A sulfur dioxide sensor comprising a first beam having a functionalized sensing surface capable of sensing sulfur dioxide, the first beam capable of producing a first resonant frequency; and a second beam having a functionalized reference surface not capable of sensing sulfur dioxide, the second beam capable of producing a second resonant frequency, wherein differential sensing of sulfur dioxide may be performed, further wherein the first beam is functionalized with a liquid phase of a first polymeric compound and the second beam is functionalized with a liquid phase of a second polymeric compound is provided. In one embodiment, the sensor is a nano-sensor capable of low drift accurately detecting sulfur dioxide levels at the zeptograms level. Methods of making and using a sulfur dioxide sensor are also provided.Type: ApplicationFiled: December 7, 2010Publication date: June 16, 2011Applicant: Honeywell Romania S.R.L.Inventors: Bogdan Catalin Serban, Cornel P. Cobianu, Mihai N. Mihaila, Viorel Georgel Dumitru
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Patent number: 7927906Abstract: Apparatus, methods, and systems for bonding a cover wafer to a MEMS threshold sensors located on a silicon disc. The cover wafer is trenched to form a region when bonded to the silicon wafer that produces a gap over the contact bond pads of the MEMS threshold sensor. The method includes a series of cuts that remove part of the cover wafer over the trenches to permit additional cuts that may avoid the contact bond pads of the MEMS threshold sensor. In addition the glass frit provides for isolation of the sensor with a hermetic seal. The cavity between the MEMS threshold sensor and the cover wafer may be injected with a gas such as nitrogen to influence the properties of the MEMS threshold sensor. The MEMS threshold sensor may be utilized to sense a threshold for pressure, temperature or acceleration.Type: GrantFiled: February 4, 2008Date of Patent: April 19, 2011Assignee: Honeywell International Inc.Inventors: Cornel P. Cobianu, Viorel-Georgel Dumitru, Ion Georgescu
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Patent number: 7913541Abstract: The design and synthesis of a matrix nanocomposite containing amino carbon nanotubes used as a functionalized sensing layer for carbon dioxide detection by means acoustic wave sensing devices, e.g., SAW/BAW devices. These sensing materials contain a type of amino carbon nanotubes (single walled or multi-walled) and a polymer (or other compounds) which are sensitive to carbon dioxide in the acoustic wave sensing device based gas sensors. The sensitivity of the matrix consisting of the amino carbon nanotubes and a polymer (or other compounds) is ensured by the presence of amino groups which can react at room temperature with CO2 in a reversible process to form carbamates.Type: GrantFiled: April 30, 2007Date of Patent: March 29, 2011Assignee: Honeywell International Inc.Inventors: Bogdan Catalin Serban, Cornel P. Cobianu, Mircea Bercu, Nicolae Varachiu, Mihai N. Mihaila, Cazimir G. Bostan, Stefan Ioan Voicu
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Patent number: 7867552Abstract: Methods can be adapted for design of a sensitive monolayer for detection of hydrogen sulphide at room temperature with SAW/BAW devices. The sensitive monolayer can be synthesized based on chemical compounds, which belongs to a class of thiacalix[n]arenas, mercapto halides, mercapto alcohols and chloromethylated thiacalix[n]arenas. The sensitive monolayer can be directly immobilized or anchored at the surface of a piezoelectric quartz substrate in a covalently bonded manner by means of direct printing process. The piezoelectric quartz substrate can be activated in basic medium or in acid medium before the immobilization of the sensitive monolayer in order to increase the population of OH groups. Thus, the synthesized sensitive monolayer exhibits a high site density, fast response and long-term stability for H2S sensing.Type: GrantFiled: May 7, 2008Date of Patent: January 11, 2011Assignee: Honeywell International Inc.Inventors: Bogdan-Catalin Serban, Viorel-Georgel Dumitru, Cornel P. Cobianu, Stefan-Dan Costea, Nicolae Varachiu, Stefan I. Voicu
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Patent number: 7784344Abstract: Apparatus, methods, and systems for sensing acceleration and magnetic fields in all three axes from a first capacitive bridge sensor having a first proof mass; and a second capacitive bridge sensor having a second proof mass located within the first proof mass. The second proof mass is coupled to the first proof mass by springs that permit movement in the second axis. Sensing of the remaining axis of interest may be done by a third and fourth capacitive bridge configured similar to that of the first and second capacitive bridge sensors. The third and fourth capacitive bridge sensors may be oriented 90 degrees off of the first and second capacitive bridge. An alternative is to locate a third capacitive bridge within the second proof mass.Type: GrantFiled: November 29, 2007Date of Patent: August 31, 2010Assignee: Honeywell International Inc.Inventors: Ioan Pavelescu, Ion Georgescu, Dana Elena Guran, Cornel P. Cobianu
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Patent number: 7723961Abstract: A battery protection and monitoring system includes a plurality of MAFET (Mechanically Actuated Field Effect Transistor) switches, wherein each MAFET switch among the MAFET switches is capable of switching from an open switch condition to a closed switch condition or vice versa, such that the plurality of MAFET switches are connectable to a battery. Such a system further includes one or more transistors associated with and which communicate electrically with at least one MAFET switch among the MAFET switches. A PPTC (Polymeric Positive Temperature Coefficient) device is also associated with the transistors and the MAFET switches, such that the PPTC device, the MAFET switches and the transistors operate in association with one another and the open switch condition or the closed switch condition of the plurality of MAFET switches to identify, monitor and thus prevent at least one dangerous condition associated with the battery.Type: GrantFiled: August 7, 2007Date of Patent: May 25, 2010Assignee: Honeywell International Inc.Inventors: Cornel P. Cobianu, Viorel-Georgel Dumitru, Ion Georgescu, Mihai Gologanu, Stefan D. Costea
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Patent number: 7695993Abstract: A method can be adapted for design and preparation of a matrix nanocomposite sensing film for hydrogen sulphide SAW/BAW detection at room temperature. A matrix nanocomposite can be synthesized by incorporating both single-wall and multi-wall thiolated carbon nanotubes into conductive organic polymers or ceramic nanocrystalline in a properly functionalized manner. A thin organic sensing film can be prepared based on the matrix nanocomposite. The matrix nanocomposite sensing film can be prepared on a surface of a SAW/BAW device by an additive process or a direct printing process. Finally, the sensing film can be consolidated by thermal annealing or laser annealing under ambient conditions in order to obtain the stable sensing film with higher sensitivity and electrical properties for a SAW/BAW based H2S sensor.Type: GrantFiled: May 7, 2008Date of Patent: April 13, 2010Assignee: Honeywell International Inc.Inventors: Bogdan-Catalin Serban, Stefan I. Voicu, Stefan-Dan Costea, Cornel P. Cobianu
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Patent number: 7651879Abstract: Improved SAW pressure sensors and manufacturing methods thereof. A SAW wafer including a number of SAW transducers disposed thereon may be provided. A cover wafer may also be provided, with a glass wall situated between the cover wafer and the SAW wafer. The cover wafer may be secured to the SAW wafer such that the glass wall surrounds the SAW transducers. In some instances, the glass wall may define, at least in part, a separation between the cover wafer and the SAW wafer. One or more contours may also be provided between the cover wafer and the SAW wafer such that at least one of the contours surrounds at least one of the SAW transducers when the cover wafer is disposed over and secured relative to the SAW wafer.Type: GrantFiled: December 7, 2005Date of Patent: January 26, 2010Assignee: Honeywell International Inc.Inventors: Cornel P. Cobianu, Ioan Pavelescu, Viorel V. Avramescu, James D. Cook, Leonard J. McNally
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Publication number: 20100012168Abstract: Solar cells and solar cell assemblies that may be tuned for greater sensitivity to particular ranges of energy within the electromagnetic spectrum. In some instances, a solar cell may include a tunable electron conductor that permits greater choices in quantum dots, thereby providing solar cells that can be constructed to utilize a larger fraction of the solar spectrum. In some cases, the electron conductor may include group III nitride-based materials. A solar cell assembly is also disclosed that may include a first quantum dot solar cell and a second quantum dot solar cell. The first and second quantum dot solar cells may be tuned for differing portions of the electromagnetic spectrum.Type: ApplicationFiled: July 16, 2009Publication date: January 21, 2010Applicant: HONEYWELL INTERNATIONALInventors: Mihai N. Mihaila, Viorel-Georgel Dumitru, Cornel P. Cobianu, Mircea Bercu, Bogdan-Catalin Serban
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Publication number: 20090280031Abstract: Methods can be adapted for design of a sensitive monolayer for detection of hydrogen sulphide at room temperature with SAW/BAW devices. The sensitive monolayer can be synthesized based on chemical compounds, which belongs to a class of thiacalix[n]arenas, mercapto halides, mercapto alcohols and chloromethylated thiacalix[n]arenas. The sensitive monolayer can be directly immobilized or anchored at the surface of a piezoelectric quartz substrate in a covalently bonded manner by means of direct printing process. The piezoelectric quartz substrate can be activated in basic medium or in acid medium before the immobilization of the sensitive monolayer in order to increase the population of OH groups. Thus, the synthesized sensitive monolayer exhibits a high site density, fast response and long-term stability for H2S sensing.Type: ApplicationFiled: May 7, 2008Publication date: November 12, 2009Inventors: Bogdan-Catalin Serban, Viorel-Georgel Dumitru, Cornel P. Cobianu, Stefan-Dan Costea, Nicolae Varachiu, Stefan I. Voicu
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Publication number: 20090280593Abstract: A method can be adapted for design and preparation of a matrix nanocomposite sensing film for hydrogen sulphide SAW/BAW detection at room temperature. A matrix nanocomposite can be synthesized by incorporating both single-wall and multi-wall thiolated carbon nanotubes into conductive organic polymers or ceramic nanocrystalline in a properly functionalized manner. A thin organic sensing film can be prepared based on the matrix nanocomposite. The matrix nanocomposite sensing film can be prepared on a surface of a SAW/BAW device by an additive process or a direct printing process. Finally, the sensing film can be consolidated by thermal annealing or laser annealing under ambient conditions in order to obtain the stable sensing film with higher sensitivity and electrical properties for a SAW/BAW based H2S sensor.Type: ApplicationFiled: May 7, 2008Publication date: November 12, 2009Inventors: Bogdan-Catalin Serban, Stefan I. Voicu, Stefan-Dan Costea, Cornel P. Cobianu
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Publication number: 20090194828Abstract: Apparatus, methods, and systems for bonding a cover wafer to a MEMS threshold sensors located on a silicon disc. The cover wafer is trenched to form a region when bonded to the silicon wafer that produces a gap over the contact bond pads of the MEMS threshold sensor. The method includes a series of cuts that remove part of the cover wafer over the trenches to permit additional cuts that may avoid the contact bond pads of the MEMS threshold sensor. In addition the glass frit provides for isolation of the sensor with a hermetic seal. The cavity between the MEMS threshold sensor and the cover wafer may be injected with a gas such as nitrogen to influence the properties of the MEMS threshold sensor. The MEMS threshold sensor may be utilized to sense a threshold for pressure, temperature or acceleration.Type: ApplicationFiled: February 4, 2008Publication date: August 6, 2009Inventors: Cornel P. Cobianu, Viorel-Georgel Dumitru, Ion Georgescu