Patents by Inventor Fredrick J. Axon

Fredrick J. Axon 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).

  • Dry film photoresist for forming a conformable mask and method of application to a printed circuit board or the like
    Patent number: 5213945
    Abstract: A dry film for forming a solder mask includes a cover sheet, a photoimageable composition layer which is curable to form a solder mask and a top coat interposed between the cover sheet and the photoimageable composition layer which is selectively adherent to the photoimageable composition layer. The dry film is applied to a surface of a printed circuit board with a minor portion of the area of the photoimageable composition layer tacked to the printed circuit board. The cover sheet is peeled away. With heat and vacuum, the photoimageable composition layer is laminated to the irregular surface of the printed circuit board, conforming the photoimageable composition layer to the contours thereof and leaving the top coat as a protective covering over the photoimageable composition layer. The photoimageable composition layer is exposed to patterned actinic radiation, developed and cured to form a hard, permanent solder mask.
    Type: Grant
    Filed: July 25, 1991
    Date of Patent: May 25, 1993
    Assignee: Morton International, Inc.
    Inventors: Leo Roos, Fredrick J. Axon, James J. Briguglio
  • Method of forming a conformable mask on a printed circuit board
    Patent number: 4889790
    Abstract: A dry film for forming a solder mask includes a cover sheet, a photoimageable composition layer which is curable to form a solder mask and a top coat interposed between the cover sheet and the photoimageable composition layer which is selectively adherent to the photoimageable composition layer. The dry film is applied to a surface of a printed circuit board with a minor portion of the area of the photoimageable composition layer tacked to the printed circuit board. The cover sheet is peeled away. With heat and vacuum, the photoimageable composition layer is laminated to the irregular surface of the printed circuit board, conforming the photoimageable composition layer to the contours thereof and leaving the top coat as a protective covering over the photoimageable composition layer. The photoimageable composition layer is exposed to patterned actinic radiation, developed and cured to form a hard, permanent solder mask.
    Type: Grant
    Filed: February 26, 1988
    Date of Patent: December 26, 1989
    Assignee: Morton Thiokol, Inc.
    Inventors: Leo Roos, Fredrick J. Axon, James J. Briguglio