Patents by Inventor Heinz Ritzmann

Heinz Ritzmann 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).

  • Patent number: 6621157
    Abstract: For encapsulating an electronic component, in particular a semiconductor chip the component (3) at a distance is fastened onto a flat substrate (2). For this on the substrate there is deposited an elastomer layer (4, 9) which compensates the differing thermal expansion coefficients between the substrate and the component. A buffer material and/or an adhesive in liquid or pasty form is deposited from a dispenser and the component at room temperature is placed onto the buffer material and/or the adhesive. Before the final curing the buffer material and/or the adhesive is firstly subjected to a precuring. Subsequently the component by way of electrical leads is connected to contact locations on the substrate and lastly there is effected an encasing of all remaining hollow spaces including the electrical leads, with a protective mass.
    Type: Grant
    Filed: January 6, 2000
    Date of Patent: September 16, 2003
    Assignee: Alphasem AG
    Inventors: Gustav Wirz, Wolfgang Herbst, Heinz Ritzmann