Patents by Inventor Karel M. Van Der Waarde

Karel M. Van Der Waarde 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).

  • Structure comprising platinum layer bound to a surface of a silicon oxide layer
    Patent number: 5969419
    Abstract: By treating the silicon-oxide insulating layer of a semiconductor device with an aqueous metal-salt solution of a metal of an ion radius of less than 0.110 nm, for example, Sc, La or Zr, before a platinum electrode layer is provided on the insulating layer, the platinum layer shows excellent adhesive properties.
    Type: Grant
    Filed: September 8, 1994
    Date of Patent: October 19, 1999
    Assignee: U.S. Philips Corporation
    Inventors: Rudolf P. Tijburg, Karel M. Van Der Waarde
  • Electric lamp with SiO.sub.2 vessel and seal therefor
    Patent number: 5159239
    Abstract: The electric lamp has a quartz glass lamp vessel having tungsten current supply conductors extending through the wall of the lamp vessel to an electric element arranged in the lamp vessel. The current supply conductors have a continuous coating of quartz glass where they extend through the envelope wall from the interior to the exterior of the lamp vessel. The coating forms with the current supply conductor a glass/metal interface forming a gas-tight seal. The glass of the coating adjoining the interface contains thorium, hafnium, chromium, aluminum, titanium, tantalum, magnesium, calcium, strontium, barium, zirconium, lanthanum, scandium, lanthanides, niobium, boron and yttrium. The coating has a very strong adhesion to the metal and; the lamp vessel at the gas-tight seal has a great strength.
    Type: Grant
    Filed: August 27, 1991
    Date of Patent: October 27, 1992
    Assignee: U.S. Philips Corporation
    Inventors: Tjepke H. Ekkelboom, Karel M. Van Der Waarde