Patents by Inventor Klaas Prijs

Klaas Prijs 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 of manufacturing a glass-bonded magnetic head having diffusion barriers
    Patent number: 4665612
    Abstract: A magnetic head (32) having a magnet core (30) of ferrite and a layer of a bonding material (28) consisting of glass in the gap-forming area of the magnet core (38). In order to ensure that on the one hand the ferrite be not attacked by the glass during the bonding process and that on the other hand the temperature adjustment during the bonding process is not too critical, double layer diffusion barriers are provided between the layer of bonding material (28) and the core parts (10) and (10'), respectively, which barriers are formed by a layer of silicon nitride (26) on the side of the bonding layer (28) and a layer of silicon oxide (24) on the side of the core parts (10) and (10'), respectively.
    Type: Grant
    Filed: April 7, 1986
    Date of Patent: May 19, 1987
    Assignee: U.S. Philips Corporation
    Inventors: Johannes P. M. Damen, Klaas Prijs, Cornelis H. M. Witmer, Gijsbertus de With
  • Glass-bonded magnetic head having diffusion barriers
    Patent number: 4600957
    Abstract: A magnetic head (32) includes a magnet core (30) of ferrite and a layer of a bonding material (28) consisting of glass in the gap-forming area of the magnet core (38). In order to ensure that the ferrite is not attacked by the glass during the bonding process and that the temperature adjustment during the bonding process is not too critical, double layer diffusion barriers are provided between the layer of bonding material (28) and the core parts (10), (10'), respectively. Each barrier is formed by a layer of silicon nitride (26) on the side of the bonding layer (28) and a layer of silicon oxide (24) on the side of the core.
    Type: Grant
    Filed: May 2, 1983
    Date of Patent: July 15, 1986
    Assignee: U. S. Philips Corporation
    Inventors: Johannes P. M. Damen, Klaas Prijs, Cornelis H. M. Witmer, Gijsbertus de With