Patents by Inventor Chin-Kung Chang

Chin-Kung 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).

  • Patent number: 7372497
    Abstract: An image sensor device and method for forming said device are described. The image sensor structure comprises a substrate with photodiodes, an interconnect structure formed on the substrate, a color filter layer above the interconnect structure, a first microlens array, an overcoat layer, and a second microlens array. A key feature is that a second microlens has a larger radius of curvature than a first microlens. Additionally, each first microlens and second microlens is a flat convex lens. Thus, a thicker second microlens with a short focal length is aligned above a thinner first microlens having a long focal length. A light column that includes a first microlens, a second microlens and a color filter region is formed above each photodiode. A second embodiment involves replacing a second microlens in each light column with a plurality of smaller second microlenses that focus light onto a first microlens.
    Type: Grant
    Filed: April 28, 2004
    Date of Patent: May 13, 2008
    Assignee: Taiwan Semiconductor Manufacturing Company
    Inventors: Fu-Tien Weng, Yu-Kung Hsiao, Chin-Kung Chang, Hung-Jen Hsu, Yi-Ming Dai, Chin-Chen Kuo
  • Publication number: 20050242271
    Abstract: An image sensor device and method for forming said device are described. The image sensor structure comprises a substrate with photodiodes, an interconnect structure formed on the substrate, a color filter layer above the interconnect structure, a first microlens array, an overcoat layer, and a second microlens array. A key feature is that a second microlens has a larger radius of curvature than a first microlens. Additionally, each first microlens and second microlens is a flat convex lens. Thus, a thicker second microlens with a short focal length is aligned above a thinner first microlens having a long focal length. A light column that includes a first microlens, a second microlens and a color filter region is formed above each photodiode. A second embodiment involves replacing a second microlens in each light column with a plurality of smaller second microlenses that focus light onto a first microlens.
    Type: Application
    Filed: April 28, 2004
    Publication date: November 3, 2005
    Inventors: Fu-Tien Weng, Yu-Kung Hsiao, Chin-Kung Chang, Hung-Jen Hsu, Yi-Ming Dai, Chin-Chen Kuo