Patents by Inventor Takako Nakadai

Takako Nakadai 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).

  • Device simulation method and device simulator
    Patent number: 5684723
    Abstract: A simulation method for obtaining internal information at discrete points within a semiconductor device to be analyzed based on information related to the semiconductor device by forming a coefficient matrix A having matrix equation A.multidot.X=b with respect to each of the discrete points within the semiconductor device and solving the matrix equation. X denotes a matrix of physical quantities to be obtained and b is a known matrix. The device simulation method includes the steps of (a) assigning a rectangular work region to the semiconductor device regardless of its shape so that it fits within the work region, (b) forming a matrix of elements with respect to each of the discrete points within the analyzing region and dummy elements with respect to each of the discrete points within a non-analyzing region at least within the work region.
    Type: Grant
    Filed: October 13, 1994
    Date of Patent: November 4, 1997
    Assignee: Fujitsu Limited
    Inventor: Takako Nakadai