Patents by Inventor Wolfgang Cramer

Wolfgang Cramer 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 seal testing capacitive sensors
    Patent number: 6675633
    Abstract: 1. Method for testing the tightness of capacitive sensors 2.1. Known methods of seal testing cannot be used because of the extremely small volume of the sensor cavity or on wafer level. Other known methods of seal testing are only possible with high expenditure on safety because, for example, radio isotopes are used. 2.2. Method for testing the tightness of capacitive sensors arranged in a hermetically sealed enclosure, in which the processed sensors are arranged in the form of a wafer, wherein the already sawn wafer bearing the sensors is immersed in a test fluid under defined conditions, the capacitance of each sensor is then measured and compared with the capacitance of reference sensors. 2.3. The invention is especially suitable for testing the tightness of capacitive, hermetically sealed sensors.
    Type: Grant
    Filed: July 3, 2002
    Date of Patent: January 13, 2004
    Assignee: Conti Temic microelectronic GmbH
    Inventor: Wolfgang Cramer
  • Method for seal testing capacitive sensors
    Publication number: 20030019282
    Abstract: 1.
    Type: Application
    Filed: July 3, 2002
    Publication date: January 30, 2003
    Applicant: Conti Temic microelectronic GmbH
    Inventor: Wolfgang Cramer