Patents by Inventor Hermanus J. Borg

Hermanus J. Borg 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).

  • Method and device for writing an optical record carrier
    Patent number: 6285647
    Abstract: A method for writing an optical record carrier, in which a mark representing recorded data is written in the record carrier by a sequence of radiation pulses. The radiation power has a different level in between the pulses of a sequence and immediately after the last pulses of a sequence. This allows an independent control of the leading and trailing edge jitter of the marks written.
    Type: Grant
    Filed: October 13, 1998
    Date of Patent: September 4, 2001
    Assignee: U.S. Philis Corporation
    Inventors: Roel Van Woudenberg, Johan P. W. B. Duchateau, Hermanus J. Borg
  • Rewritable optical information medium
    Patent number: 6040066
    Abstract: A rewritable optical information medium has a phase-change recording layer (3) on the basis of an alloy of Ge-Sb-Te-O, having the composition (Ge.sub.a Sb.sub.b Te.sub.c).sub.1-d O.sub.d, wherein:a+b+c=10.0001 a d a 0.035The addition of oxygen considerably speeds up the crystallization rate of Ge-Sb-Te materials. Such a medium is suitable for high speed recording (i.e. at least eight times the CD-speed), such as for DVD-RAM and optical tape. The amount of oxygen in the recording layer (3) can be used to tune the crystallization rate to the desired value.
    Type: Grant
    Filed: December 7, 1998
    Date of Patent: March 21, 2000
    Assignee: U.S. Philips Corporation
    Inventors: Guo-Fu Zhou, Bernardus A.J. Jacobs, Johannes C.N. Rijpers, Hermanus J. Borg