Patents by Inventor Noritsugu Kakegawa

Noritsugu Kakegawa 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).

  • System for manufacturing a thin film magnetic head
    Patent number: 6678939
    Abstract: A system for manufacturing a thin-film magnetic head having a means for cutting a wafer into bars, each bar having a plurality of thin-film magnetic head sliders which are sequentially coupled with each other, a means for identifying the bar to be worked to generate an identification signal which indicates identity of said bar, a means for obtaining data of said bar in a unit of bar depending upon said identification signal, and a means for processing at least one working of said bar on the basis of said obtained data of said bar.
    Type: Grant
    Filed: February 6, 2001
    Date of Patent: January 20, 2004
    Assignee: TDK Corporation
    Inventors: Tomoyuki Yoshida, Noritsugu Kakegawa
  • Method for controlling machining process of workpiece
    Patent number: 6330488
    Abstract: A method for controlling a machining process of a workpiece includes a step of measuring amounts of machining of the workpiece by a plurality of sensors located at different positions on the workpiece, the sensors providing detection signals which represent the respective measured amounts, a step of removing the detection signal when the detection signal has an abnormal value which is extremely different in comparison with values of the other detection signals by using a smoothing method, and a step of controlling the machining of the workpiece depending upon the remaining detection signals from the sensors.
    Type: Grant
    Filed: October 27, 1998
    Date of Patent: December 11, 2001
    Assignee: TDK Corporation
    Inventors: Tomoyuki Yoshida, Noritsugu Kakegawa
  • Method for manufacturing thin-film magnetic head and manufacturing system of the head
    Publication number: 20010004800
    Abstract: A method for manufacturing a thin-film magnetic head includes a step of cutting a wafer into bars, each bar having a plurality of thin-film magnetic head sliders which are sequentially coupled with each other, a step of identifying the bar to be worked to generate an identification signal which indicates identity of the bar, a step of obtaining data of the bar in a unit of bar depending upon the identification signal, and a step of processing at least one working of the bar on the basis of the obtained data of the bar.
    Type: Application
    Filed: February 6, 2001
    Publication date: June 28, 2001
    Applicant: TDK Corporation
    Inventors: Tomoyuki Yoshida, Noritsugu Kakegawa
  • Method for manufacturing thin-film magnetic head
    Patent number: 6212761
    Abstract: A method for manufacturing a thin-film magnetic head includes a step of cutting a wafer into bars, each bar having a plurality of thin-film magnetic head sliders which are sequentially coupled with each other, a step of identifying the bar to be worked to generate an identification signal which indicates identity of the bar, a step of obtaining data of the bar in a unit of bar depending upon the identification signal, and a step of processing at least one working of the bar on the basis of the obtained data of the bar.
    Type: Grant
    Filed: October 20, 1998
    Date of Patent: April 10, 2001
    Assignee: TDK Corporation
    Inventors: Tomoyuki Yoshida, Noritsugu Kakegawa