Patents by Inventor Rick J. Heh

Rick J. Heh 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: 6180291
    Abstract: A static resistant reticle for use in photolithography having optimal transmission and reduced electrostatic discharge. The reticle comprises a substrate, a patterning layer, and two layers of material having a first refractive index and a second refractive index wherein the first refractive index is greater than the second refractive index and at least one of the layers is conductive. The refractive indices and thickness of the layers are matched to create an anti-reflective coating. The anti-reflective coating optimizes transmission of light through the reticle substrate to about 98.0% to about 99.5% at a wavelength of about 360 nm to about 370 nm. The conductivity of at least one of the layers reduces electrostatic discharge further improving delineation of the pattern projected onto a silicon wafer of a semiconductor device. Preferably, the anti-reflective coating comprises two or more layers of cermet material.
    Type: Grant
    Filed: January 22, 1999
    Date of Patent: January 30, 2001
    Assignee: International Business Machines Corporation
    Inventors: Andrew Bessy, James P. Doyle, Vaughn P. Gross, C. Richard Guarnieri, Rick J. Heh, Kenneth D. Murray, James L. Speidell