Patents by Inventor Mathieu J. E. Ulenaers

Mathieu J. E. Ulenaers 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).

  • Patent number: 6125027
    Abstract: A component includes a substrate layer (1) of glass or Al.sub.2 O.sub.3, an anti-reaction layer (2) or a levelling layer (2), two electrode layers (3, 5) and a dielectric layer (4) as well as such a capacitor. Manufacture a component which provides for cost-effective, surface-mountable (SMD). The anti-reaction layer (2) on the glass substrate (1) or the levelling layer (2) on the Al.sub.2 O.sub.3 -substrate (1) is made of at least one specific material. An anti-reaction layer or a levelling layer (2) of one of the above-mentioned substances or a combination of several substances, enables a dielectric layer (4) to be provided by means of which a high capacitance value is achieved.
    Type: Grant
    Filed: July 30, 1997
    Date of Patent: September 26, 2000
    Assignee: U.S. Philips Corporation
    Inventors: Mareike Klee, Wolfgang Brand, Wilhelm Hermann, Mathieu J. E. Ulenaers, Gijsbertus A. C. M. Spierings, Hendrikus J. J. M. Van Haren
  • Patent number: 5554559
    Abstract: A semiconductor device in which a capacitor (2) is provided on a surface (10) of a semiconductor body (3) with a semiconductor element (1) in which a lower electrode (11), an oxidic ferroelectric dielectric (12) and an upper electrode (13) are provided in that order, the upper electrode not covering an edge of the dielectric, after which an insulating layer (14) with superimposed metal conductor tracks is provided. According to the invention, the edge of the dielectric (12) not covered by the upper electrode (13) is coated with a coating layer (14, 20, or 30) practically imperviable to hydrogen, after which the device is heated in a hydrogen-containing atmosphere. Heating in a hydrogen atmosphere neutralizes dangling bonds which arise during deposition of the conductor tracks on the insulating layer, while the coating layer protects the dielectric from attacks by hydrogen. The semiconductor device then has a shorter access time.
    Type: Grant
    Filed: November 29, 1994
    Date of Patent: September 10, 1996
    Assignee: U.S. Philips Corporation
    Inventors: Robertus A. M. Wolters, Poul K. Larsen, Mathieu J. E. Ulenaers
  • Patent number: 5396095
    Abstract: A semiconductor device in which a capacitor (2) is provided on a surface (10) of a semiconductor body (3) with a semiconductor element (1) in which a lower electrode (11), an oxidic ferroelectric dielectric (12) and an upper electrode (13) are provided in that order, the upper electrode not covering an edge of the dielectric, after which an insulating layer (14) with superimposed metal conductor tracks is provided. According to the invention, the edge of the dielectric (12) not covered by the upper electrode (13) is coated with a coating layer (14, 20, or 30) practically imperviable to hydrogen, after which the device is heated in a hydrogen-containing atmosphere. Heating in a hydrogen atmosphere neutralizes dangling bonds which arise during deposition of the conductor tracks on the insulating layer, while the coating layer protects the dielectric from attacks by hydrogen. The semiconductor device then has a shorter access time.
    Type: Grant
    Filed: March 4, 1994
    Date of Patent: March 7, 1995
    Assignee: U.S. Philips Corporation
    Inventors: Robertus A. M. Wolters, Poul K. Larsen, Mathieu J. E. Ulenaers
  • Patent number: 5122477
    Abstract: A method of manufacturing a semiconductor device comprising a semiconductor body (3) with a surface (10) on which capacitors (2) are provided, which form memory elements, with a lower electrode (11) including platinum, a ferroelectric dielectric material (12) and an upper electrode (13) is presented. In the method according to the invention, the electrodes (11, 13) including platinum are formed by the successive deposition on a surface of a first layer (19, 26) comprising a metal from the group titanium, zirconium, hafnium or an alloy of these metals, a second layer (20, 27) comprising platinum, and a third layer (21, 28) comprising a metal from the group titanium, zirconium, hafnium, or an alloy of these metals, upon which the semiconductor body is heated in an atmosphere containing oxygen. The first metal layer ensures a good adhesion of the electrode, the second layer acts as the electrode proper, while the third metal layer counteracts adverse effects of the first layer.
    Type: Grant
    Filed: February 25, 1991
    Date of Patent: June 16, 1992
    Assignee: U.S. Philips Corporation
    Inventors: Robertus A. M. Wolters, Mathieu J. E. Ulenaers