Patents by Inventor Winfried Baron

Winfried Baron 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).

  • Developer for positive photoresists
    Patent number: 4576903
    Abstract: A developer suitable for use with positive photoresists is based on a buffered aqueous-alkaline solution containing non-ionic surfactants and contains in the solution 1-100 ppm of the surfactants, preferably of the ethoxylated-alkylphenol type. The resultant photoresist shows outstanding properties with respect to the resolution and edge sharpness obtainable in the developed resist image and with respect to its developing activity, developing capacity and stability.
    Type: Grant
    Filed: December 21, 1984
    Date of Patent: March 18, 1986
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Winfried Baron, Kurt Marquard, Hans-Joachim Merrem, Raimund Sindlinger, Klaus-Peter Thiel