Patents by Inventor Linda Weitzel

Linda Weitzel 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).

  • Tin-zinc solder connection to a printed circuit board or the like
    Patent number: 5452842
    Abstract: An electronic package comprises a component mounted on a substrate, such as a printed circuit board, by a solder connection that is based upon a tin alloy containing zinc. The connection is formed to copper faying surface on the substrate, and includes a first layer formed of a zinc-free tin metal bonded to the copper surface and a second layer formed of the tin-zinc solder alloy bonded to the first layer. The first layer provides a zinc-free barrier between the copper and the tin-zinc alloy to retard zinc migration to the copper interface that would otherwise result in dezincification of the solder alloy and reduce the mechanical properties of the connection.
    Type: Grant
    Filed: November 7, 1994
    Date of Patent: September 26, 1995
    Assignee: Motorola, Inc.
    Inventors: Cynthia M. Melton, Linda Weitzel
  • Tin-zinc solder connection to a printed circuit board of the like
    Patent number: 5390080
    Abstract: An electronic package comprises a component mounted on a substrate, such as a printed circuit board, by a solder connection that is based upon a tin alloy containing zinc. The connection is formed to copper faying surface on the substrate, and includes a first layer formed of a zinc-free tin metal bonded to the copper surface and a second layer formed of the tin-zinc solder alloy bonded to the first layer. The first layer provides a zinc-free barrier between the copper and the tin-zinc alloy to retard zinc migration to the copper interface that would otherwise result in dezincification of the solder alloy and reduce the mechanical properties of the connection.
    Type: Grant
    Filed: May 3, 1993
    Date of Patent: February 14, 1995
    Assignee: Motorola
    Inventors: Cynthia M. Melton, Linda Weitzel