Patents by Inventor Rolf Beatus Schaefer

Rolf Beatus Schaefer 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 for producing multiple magnetic layers of materials with known thickness and composition using a one-step electrodeposition process
    Patent number: 7569131
    Abstract: A method for multi-layer electrodeposition in a single bath is also provided. A substrate is immersed in a bath. An electrodeposition operation is initiated for depositing a first layer of material on the substrate. The electrodeposition operation includes agitating the bath and applying current pulses. The electrodeposition operation is later altered for depositing a second layer of material on the first layer, where the second layer is of a different composition than the first layer. In the altered mode, the current density is changed for altering a composition of material deposited on the substrate, the duration and/or frequency of the current pulses are altered, and the bath is agitated at a different rate of agitation.
    Type: Grant
    Filed: August 12, 2002
    Date of Patent: August 4, 2009
    Assignee: International Business Machines Corporation
    Inventors: April Dawn Hixon-Goldsmith, Matthew Walter Last, Murali Ramasubramanian, Rolf Beatus Schaefer