Patents by Inventor Stephen E. Carmassi

Stephen E. Carmassi 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 of soldering in a controlled-convection surface-mount reflow furnace
    Patent number: 5232145
    Abstract: A reflow furnace in which the rate at which the temperature of the parts being processed can change can be varied throughout the furnace in order to provide a high initial rise rate, a period of low or no rise, and a very fast rise to a temperature above the melting point of solder followed by a fast drop to a temperature below the melting point of the solder. The entire operation is performed in an atmosphere of air, inert gas, active gas, or combustible gas. In a stabilization zone and a reflow zone, the primary heating mode is forced, controlled convection that is perpendicular to surface of an assembly to be soldered.
    Type: Grant
    Filed: March 29, 1991
    Date of Patent: August 3, 1993
    Assignee: Watkins-Johnson Company
    Inventors: Richard C. Alley, Stephen E. Carmassi, William T. Daley, Michael F. Roffey