Patents by Inventor Gerhard Mai

Gerhard Mai 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).

  • Publication number: 20220315343
    Abstract: A method and a device for transporting and driving components and tools, such as rotors and stators for manufacture, includes a component carrier with at least two chain sprockets rigidly connected to the component carrier. The chain sprockets engage four driven chains to move, rotate and swivel or rotated to a limited extent the component carrier. With the upper chain and lower chain moving at the same speed and in opposite directions of movement, the component carrier rotates on the spot, with the two chains moving at the same speed and in the same direction of movement, the component carrier moves without rotation at the chain speed in the direction of movement, and with the chains moving at different speeds and in the same or different directions of movement, a plurality of combinations of direction of rotation, direction of movement, transport speed and rotational speed can be achieved.
    Type: Application
    Filed: July 1, 2020
    Publication date: October 6, 2022
    Applicant: Hedrich GmbH
    Inventors: Joachim Schulz, Gerhard Mais, Karl Bauch
  • Patent number: 4065851
    Abstract: To improve the bonding layer for connecting wires to semiconductor chips with contact fingers, or contact strips, on a substrate carrier, the bonding layer is formed as spongy, microporous structure, applied to discrete positions of the contact strips by screen printing, and secured to the metallic connecting strip by a diffusion zone. Preferably, the bonding layer comprises a metal of gold, palladium, silver, aluminum and copper, or an alloy of at least two of these metals, or a base alloy of one of these metals, for example gold applied as a gold paste having an average grain size of less than 5 micro-meters, the layer being between 2 to 30 micrometers thick, preferably 3 to 10 micrometers. The metal is part of a paste of the metal in an evaporative organic carrier. After screen printing, the carrier is eliminated by heating; subsequent heating converts the metal to a spongy microporous structure bonded to the substrate carrier by a diffusion zone.
    Type: Grant
    Filed: November 3, 1976
    Date of Patent: January 3, 1978
    Assignee: W. C. Heraeus GmbH
    Inventors: Franz Kummer, Gerhard Mai, Rolf Ruthardt, Horst Thiede
  • Patent number: 4027326
    Abstract: To improve the bonding layer for connecting wires to semiconductor chips with contact fingers, or contact strips, on the carrier, the bonding layer is formed as spongy, microporous structure, applied to discrete positions of the contact strips by screen printing, and secured to the metallic connecting strip by a diffusion zone. Preferably, the bonding layer comprises a metal of gold, palladium, silver, aluminum and copper, or an alloy of at least two of these metals, or a base alloy of one of those metals, for example gold applied as a gold paste having an average grain size of less than 5 micrometers, the layer being between 2 to 30 micrometers thick, preferably 3 to 10 micrometers.
    Type: Grant
    Filed: March 20, 1975
    Date of Patent: May 31, 1977
    Assignee: W. C. Heraeus GmbH
    Inventors: Franz Kummer, Gerhard Mai, Rolf Ruthardt, Horst Thiede