Patents by Inventor Stefan Heberer

Stefan Heberer 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: 20120083188
    Abstract: Aqueous dispersion comprising cerium oxide and silicon dioxide, obtainable by first mixing a cerium oxide starting dispersion and a silicon dioxide starting dispersion while stirring, and then dispersing at a shear rate of 10000 to 30000 s?1, wherein a) the cerium oxide starting dispersion—contains 0.5 to 30% by weight of cerium oxide particles as the solid phase, —a d5o of the particle size distribution of 10 to 100 nm—and has a pH of 1 to 7, and b) the silicon dioxide starting dispersion—contains 0.1 to 30% by weight of colloidal silicon dioxide particles as the solid phase, has a d5o of the particle size distribution of 3 to 50 nm and has a pH of 6 to 11.5, d) with the proviso that the d5o of the particle size distribution of the cerium oxide particles is greater than that of the silicon dioxide particles, the cerium oxide/silicon dioxide weight ratio is >1 and the amount of cerium oxide starting dispersion is such that the zeta potential of the dispersion is negative.
    Type: Application
    Filed: May 18, 2010
    Publication date: April 5, 2012
    Applicants: BASF SE, EVONIK DEGUSSA GMBH
    Inventors: Michael Kroell, Wolfgang Lortz, Stefan Heberer, Mario Brands, Yuzhuo Li, Bettina Drescher, Diana Franz
  • Patent number: 8008201
    Abstract: Aqueous cerium oxide dispersion Aqueous cerium oxide dispersion, containing 5 to 60% by weight cerium oxide. It can be used to polish SiO2 in the semiconductor industry.
    Type: Grant
    Filed: March 8, 2006
    Date of Patent: August 30, 2011
    Assignee: Evonik Degussa GmbH
    Inventors: Michael Kröll, Stefan Heberer, Stipan Katusic, Michael Krämer, Wolfgang Lortz
  • Publication number: 20100171069
    Abstract: A dispersion comprising particles of cerium oxide and sheet silicate and one or more aminocarboxylic acids and/or salts thereof, where the zeta potential of sheet silicate particles is negative and that of the cerium oxide particles is positive or equal to zero, and the zeta potential of the dispersion is negative overall, the mean diameter of the•cerium oxide particles is not more than 200 nm•sheet silicate particles is less than 100 nm, the content, based in each case on the total amount of the dispersion, of•cerium oxide particles is from 0.1 to 5% by weight•sheet silicate particles is from 0.01 to 10% by weight and•aminocarboxylic acid or salt thereof is from 0.01 to 5% by weight and the pH of the dispersion is from 7.5 to 10.5.
    Type: Application
    Filed: May 5, 2008
    Publication date: July 8, 2010
    Applicant: Evonik Degussa GmbH
    Inventors: Michael Kroell, Stefan Heberer, Katharina Dauth
  • Publication number: 20100163785
    Abstract: A dispersion comprising particles of cerium oxide and colloidal silicon dioxide and in each case one or more aminocarboxylic acids and/or salts thereof, where the zeta potential of the silicon dioxide particles is negative and that of the cerium oxide particles is positive or equal to zero, and the zeta potential of the dispersion is negative overall, the mean diameter of the • cerium oxide particles is not more than 200 nm silicon dioxide particles is less than 100 nm, the content, based in each case on the total amount of the dispersion, of • cerium oxide particles is from 0.1 to 5% by weight silicon dioxide particles is from 0.01 to 10% by weight and • aminocarboxylic acid or salt thereof is from 0.01 to 5% by weight and —the pH of the dispersion is from 7.5 to 10.5.
    Type: Application
    Filed: May 5, 2008
    Publication date: July 1, 2010
    Applicant: EVONIK DEGUSSA GMBH
    Inventors: Michael Kroell, Stefan Heberer, Katharina Dauth
  • Publication number: 20100102268
    Abstract: A dispersion comprising cerium oxide particles and colloidal silicon dioxide particles, where—the zeta potential of the silicon dioxide particles is negative and that of the cerium oxide particles is positive or equal to zero, and the zeta potential of the dispersion is negative overall, and—the mean particle diameter of the cerium oxide particles is not more than 200 nm and that of the silicon dioxide particles is not more than 100 nm, the mean particle diameter of the cerium oxide particles being greater than that of the silicon dioxide particles—the cerium oxide/silicon dioxide weight ratio is from 1.1:1 to 100:1 and—the pH of the dispersion is from 7.5 to 10.5.
    Type: Application
    Filed: November 9, 2007
    Publication date: April 29, 2010
    Applicant: Evonik Degussa GmbH
    Inventors: Michael Kroell, Stefan Heberer, Katharina Dauth
  • Publication number: 20100083584
    Abstract: A dispersion comprising cerium oxide particles and particles of one or more sheet silicates, where the zeta potential of the sheet silicate particles is negative and that of the cerium oxide particles is positive or equal to zero, and the zeta potential of the dispersion is negative overall, the mean particle diameter of the cerium oxide particles and the mean particle diameter of the sheet silicate particles is not more than 100 nm and the pH of the dispersion is from 7.5 to 10.5, preferably from 9 to 10.
    Type: Application
    Filed: December 19, 2007
    Publication date: April 8, 2010
    Applicant: EVONIK DEGUSSA GmbH
    Inventors: Michael Kroell, Stefan Heberer, Katharina Dauth
  • Publication number: 20100029080
    Abstract: Aqueous cerium oxide dispersion Aqueous cerium oxide dispersion, containing 5 to 60% by weight cerium oxide. It can be used to polish SiO2 in the semiconductor industry.
    Type: Application
    Filed: March 8, 2006
    Publication date: February 4, 2010
    Inventors: Michael Kröll, Stefan Heberer, Stipan Katusic, Michael Krämer, Wolfgand Lortz
  • Patent number: 7569624
    Abstract: The invention concerns an adhesive composition for producing thermoset products, capable of being heated by means of an electric field, a magnetic field, an electromagnetic field or an alternating electromagnetic field, and containing filler particles which are metallic, ferromagnetic, ferrimagnetic, superparamagnetic or paramagnetic. Said adhesive composition can be hardened under the action of heat to form a high-resistance stable adhesive assembly, said resulting adhesive assemblies capable of being likewise dissociated under the action of heat.
    Type: Grant
    Filed: November 12, 2002
    Date of Patent: August 4, 2009
    Assignees: Degussa AG, Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung E.V.
    Inventors: Jana Kolbe, Thomas Kowalik, Matthias Popp, Monika Sebald, Oliver Schorsch, Stefan Heberer, Markus Pridoehl, Guido Zimmermann, Andreas Hartwig, Erwin Born
  • Patent number: 7553465
    Abstract: Cerium oxide powder having carbonate groups and made of crystalline primary particles containing cerium oxide and having carbonate groups on the surface and in a region close to the surface, and having a BET surface area of from 25 to 150 m2/g, a mean diameter of from 5 to 50 nm, a carbonate concentration in the region close to the surface decreasing inwardly from the surface, a carbon content due to carbonate groups on the surface of from 5 to 50% by area, a carbon content due to carbonate groups at a depth of about 5 nm in a region close to the surface of from 0 to 30% by area, a content of cerium oxide calculated as CeO2 and based on the powder of at least 99.5% by weight and a content of organic and inorganic carbon of from 0.01 to 0.3% by weight. A dispersion containing this powder.
    Type: Grant
    Filed: August 11, 2006
    Date of Patent: June 30, 2009
    Assignee: Degussa AG
    Inventors: Stipan Katusic, Michael Kroell, Michael Kraemer, Stefan Heberer, Edwin Staab, Guenther Michael
  • Patent number: 7438836
    Abstract: The present invention provides a dispersion, which contains nano-sized zinc oxide particles, a coating preparation containing the dispersion, a process for the production of the dispersion, and a coating preparation containing the dispersion, and a use of the coating preparation.
    Type: Grant
    Filed: January 24, 2005
    Date of Patent: October 21, 2008
    Assignee: Evonik Degussa GmbH
    Inventors: Guenther Michael, Stefan Heberer, Ruediger Mertsch, Robert Maier, Simone Jetton, Frans De Peuter
  • Patent number: 7365101
    Abstract: A dispersion of pyrogenically produced cerium oxide, which does not contain any particles larger than 1 ?m, is produced by dispersing a pyrogenically produced cerium oxide in water by means of a dissolver, centrifuging it, separating the supernatant from the bottom product, and again dispersing the supernatant by means of ultrasound. The dispersion can be used for chemical-mechanical polishing (CMP).
    Type: Grant
    Filed: September 15, 2004
    Date of Patent: April 29, 2008
    Assignee: Degussa AG
    Inventors: Michael Kröll, Günther Michael, Rainer Hahn, Stipan Katusic, Stefan Heberer, Ralph Brandes
  • Patent number: 7264787
    Abstract: Polycrystalline cerium oxide powder in the form of aggregates of primary particles with a specific surface of between 70 and 150 m2/g, an average primary particle diameter of between 5 and 20 nm and an average, projected aggregate diameter of between 20 and 100 nm. It is produced in that an aerosol is reacted in a flame obtained from a hydrogen-containing combustible gas and primary air and the solid obtained is then separated from the gaseous substances.
    Type: Grant
    Filed: July 12, 2004
    Date of Patent: September 4, 2007
    Assignee: Degussa AG
    Inventors: Stipan Katusic, Stefan Heberer, Michael Kraemer, Peter Kress, Michael Kroell, Edwin Staab
  • Publication number: 20070199477
    Abstract: A paste is provided having as solid phase at least one nanoscale powder and as liquid phase at least one dispersant, wherein the fraction of the nanoscale powder is 30% to 95% by weight and the fraction of the liquid phase is at least 5% by weight, based in each case on the total amount of the paste, the paste has a water content of less than 3% by weight of water and the liquid phase has a VOC content of less than 10 g/l, and the use of the paste in preparing dispersions, the dispersions prepared thereby, and use in a variety of other enduses.
    Type: Application
    Filed: August 25, 2006
    Publication date: August 30, 2007
    Applicant: DEGUSSA AG
    Inventors: Sven Hill, Kathrin Lehmann, Pedro Cavaleiro, Stefan Heberer, Markus Pridoehl
  • Publication number: 20070172406
    Abstract: Aggregated, crystalline silicon powder with a BET surface of more than 50 m2/g. The powder is produced by continuously feeding at least one vaporous or gaseous silane and optionally at least one vaporous or gaseous doping substance and an inert gas into a reactor and mixing the components there, wherein the proportion of silane is between 0.1 and 90 wt. % referred to the sum total of silane, doping substance and inert gas, the mixture is caused to react by input of energy, wherein a plasma is produced by the input of energy by means of electromagnetic radiation in the microwave range at a pressure of 10 to 1100 mbar, the reaction mixture is allowed to cool and the reaction product is separated in the form of a powder from gaseous substances. The powder may be used for the production of electronic components.
    Type: Application
    Filed: November 13, 2004
    Publication date: July 26, 2007
    Applicant: Degussa AG
    Inventors: Markus Pridoehl, Paul Roth, Hartmut Wiggers, Peter Kress, Guido Zimmermann, Stefan Heberer, Frank-Martin Petrat
  • Publication number: 20070149395
    Abstract: Composite particles useful for absorbing in the UV-A and UV-B regions contain a zinc oxide matrix and cerium oxide domains, wherein the domains are located in and on the matrix, wherein a fraction of zinc oxide is 80 to 98% by weight and a fraction of cerium oxide is 2 to 20% by weight, in each case based on the composite particles, and wherein a BET surface area of said composite particles is from 5 to 100 m2/g.
    Type: Application
    Filed: December 13, 2006
    Publication date: June 28, 2007
    Applicant: DEGUSSA AG
    Inventors: Michael Kroell, Stipan Katusic, Guido Zimmermann, Stefan Heberer
  • Publication number: 20070048205
    Abstract: Cerium oxide powder having carbonate groups and made of crystalline primary particles containing cerium oxide and having carbonate groups on the surface and in a region close to the surface, and having a BET surface area of from 25 to 150 m2/g, a mean diameter of from 5 to 50 nm, a carbonate concentration in the region close to the surface decreasing inwardly from the surface, a carbon content due to carbonate groups on the surface of from 5 to 50% by area, a carbon content due to carbonate groups at a depth of about 5 nm in a region close to the surface of from 0 to 30% by area, a content of cerium oxide calculated as CeO2 and based on the powder of at least 99.5% by weight and a content of organic and inorganic carbon of from 0.01 to 0.3% by weight. A dispersion containing this powder.
    Type: Application
    Filed: August 11, 2006
    Publication date: March 1, 2007
    Applicant: DEGUSSA AG
    Inventors: Stipan Katusic, Michael Kroell, Michael Kraemer, Stefan Heberer, Edwin Staab, Guenther Michael
  • Publication number: 20050182174
    Abstract: The present invention provides a dispersion, which contains nano-sized zinc oxide particles, a coating preparation containing the dispersion, a process for the production of the dispersion, and a coating preparation containing the dispersion, and a use of the coating preparation.
    Type: Application
    Filed: January 24, 2005
    Publication date: August 18, 2005
    Applicant: Degussa AG
    Inventors: Guenther Michael, Stefan Heberer, Ruediger Mertsch, Robert Maier, Simone Jetton, Frans De Peuter
  • Publication number: 20050074610
    Abstract: A dispersion of pyrogenically produced cerium oxide, which does not contain any particles larger than 1 ?m, is produced by dispersing a pyrogenically produced cerium oxide in water by means of a dissolver, centrifuging it, separating the supernatant from the bottom product, and again dispersing the supernatant by means of ultrasound. The dispersion can be used for chemical-mechanical polishing (CMP).
    Type: Application
    Filed: September 15, 2004
    Publication date: April 7, 2005
    Inventors: Michael Kroll, Gunther Michael, Rainer Hahn, Stipan Katusic, Stefan Heberer, Ralph Brandes
  • Publication number: 20050036928
    Abstract: Polycrystalline cerium oxide powder in the form of aggregates of primary particles with a specific surface of between 70 and 150 m2/g, an average primary particle diameter of between 5 and 20 nm and an average, projected aggregate diameter of between 20 and 100 nm. It is produced in that an aerosol is reacted in a flame obtained from a hydrogen-containing combustible gas and primary air and the solid obtained is then separated from the gaseous substances.
    Type: Application
    Filed: July 12, 2004
    Publication date: February 17, 2005
    Applicant: DEGUSSA AG
    Inventors: Stipan Katusic, Stefan Heberer, Michael Kraemer, Peter Kress, Michael Kroell, Edwin Staab
  • Publication number: 20040249037
    Abstract: The invention concerns an adhesive composition for producing thermoset products, capable of being heated by means of an electric field, a magnetic field, an electromagnetic field or an alternating electromagnetic field, and containing filler particles which are metallic, ferromagnetic, ferrimagnetic, superparamagnetic or paramagnetic. Said adhesive composition can be hardened under the action of heat to form a high-resistance stable adhesive assembly, said resulting adhesive assemblies capable of being likewise dissociated under the action of heat.
    Type: Application
    Filed: April 21, 2004
    Publication date: December 9, 2004
    Inventors: Jana Kolbe, Thomas Kowalik, Matthias Popp, Monika Sebald, Oliver Schorsch, Stefan Heberer, Markus Pridohl, Guido Zimmermann, Andreas Hartwig, Erwin Born