Patents by Inventor Maria D. Skowronska-Ptasinska

Maria D. Skowronska-Ptasinska 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).

  • Process for manufacturing a REFET or a CHEMFET, and the manufactured REFET or CHEMFET
    Patent number: 4882292
    Abstract: The invention relates to a process for manufacturing a REFET and/or CHEMFET, comprising: (a) covalent bonding of a hydrophilic polymer layer to an isolator layer applied to a semiconductor material; (b) the absorption of water or a watery solution into said hydrophilic polymer layer; and (c) the binding of a hydrophobic polymer layer to the water holding hydrophilic polymer layer. It is advantageous that this water holding hydrophilic polymer layer also contains an electrolyte and/or a buffer.Preferably an ion to be measured with the CHEMFET also forms part of the electrolyte.
    Type: Grant
    Filed: September 4, 1987
    Date of Patent: November 21, 1989
    Assignee: Stichting Centrum voor Micro-Elektronics Twente
    Inventors: Ernst J. Sudholter, Maria D. Skowronska-Ptasinska, Peter D. Van der Wal, Albert Van den Berg, David N. Reinhoudt