Patents by Inventor David C. Klem

David C. Klem 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).

  • Patent number: 4813732
    Abstract: In order to manipulate semiconductor wafers with high functional reliability, a tactile sensor based wafer handling apparatus designed to attach to a commercially available industrial robotic arm is herein described. The apparatus has three rod-like projections called fingers, one finger of which is extendable, the other which are fixed. All fingers are instrumented with strain gauge sensors in order to allow the monitoring of all forces applied to the fingers during wafer handling operations. All sensors provide proportional data. The wafer handling apparatus enables a monitoring computer to direct the motions of a satisfactorily equipped robot arm to operate in the following modes of operation. Force controlled grasping of the wafer can be provided to insure adequate grasp for transport and to limit forces exerted on the wafer. Force monitoring while releasing a wafer can be provided to insure safe hand off to another device or surface thus minimizing the likelihood of dropping a wafer.
    Type: Grant
    Filed: April 9, 1987
    Date of Patent: March 21, 1989
    Assignee: Epsilon Technology, Inc.
    Inventor: David C. Klem