Patents by Inventor Ru Kao Chang

Ru Kao Chang 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: 20040253809
    Abstract: A method for planarizing and electropolishing a conductive layer on a semiconductor structure includes forming a dielectric layer with recessed areas and non-recessed areas on the semiconductor wafer. A conductive layer is formed over the dielectric layer to cover the recessed areas and non-recessed areas. The surface of the conductive layer is then planarized to reduce variations in the topology of the surface. The planarized conductive layer is then electropolished to expose the non-recessed area.
    Type: Application
    Filed: August 10, 2004
    Publication date: December 16, 2004
    Inventors: Xiang Yu Yao, Ru Kao Chang, Peihaur Yih, Hui Wang