Patents by Inventor Albericus A. M. Hoevenaars

Albericus A. M. Hoevenaars 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).

  • Optical information carrier
    Patent number: 5790512
    Abstract: A method for manufacturing optical information carriers, in which a photoresist layer (20) on a master disc (5) is exposed by a radiation beam (19). The intensity of the radiation beam is controlled by a modulator (14) and a control device (10) in such a manner that the exposure dose has a constant predetermined value over the length of a recorded area, which value is independent of the length of the area.
    Type: Grant
    Filed: November 25, 1996
    Date of Patent: August 4, 1998
    Assignee: U.S. Philips Corporation
    Inventors: Paul L. M. Put, Albericus A. M. Hoevenaars
  • Method of maufacturing a master disc and an apparatus for carrying out the method
    Patent number: 5605782
    Abstract: A method for manufacturing optical information carriers, in which a photoresist layer (20) on a master disc (5) is exposed by a radiation beam (19). The intensity of the radiation beam is controlled by a modulator (14) and a control device (10) in such a manner that the exposure dose has a constant predetermined value over the length of a recorded area, which value is independent of the length of the area.
    Type: Grant
    Filed: December 22, 1994
    Date of Patent: February 25, 1997
    Assignee: U.S. Philips Corporation
    Inventors: Paul L. M. Put, Albericus A. M. Hoevenaars