Patents by Inventor Sigurd Hagen

Sigurd Hagen 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).

  • Negatively acting photoresist composition based on polyimide precursors
    Patent number: 6010825
    Abstract: A negatively operating photoresist composition comprising: (a) a polyimide precursor containing repeating structural units of formula (1) ##STR1## the composition comprises in all as many structural units of formula (I), which have residues R.sub.2, that the composition can be developed by means of aqueous-alkaline developers for photoresists, which are free of organic solvents.
    Type: Grant
    Filed: September 10, 1998
    Date of Patent: January 4, 2000
    Assignee: Olin Microelectronics Chemicals, Inc.
    Inventors: Sigurd Hagen, Nadia Reichlin