Patents by Inventor Pei-Chao Cheng

Pei-Chao Cheng 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: 6830648
    Abstract: A method for separating a substrate and a thin-film material of an optical recording memory media using ultrasonic includes steps of placing an optical recording memory media in an ultrasonic environment and using ultrasonic to damage weaker interconnected interfaces of the optical recording memory media, thereby enabling the interconnected interfaces to absorb energies for attenuating or losing adhesive forces thereof with other layers. The entire method has simple operations, authentically completes the separation, facilitates high quality recycling of substrates and thin-film materials of optical recording memory media s, and effectively avoids possible re-contamination during the recycling process.
    Type: Grant
    Filed: June 10, 2003
    Date of Patent: December 14, 2004
    Assignee: Far East College
    Inventors: Jenn-Shing Wang, Pei-Chao Cheng
  • Publication number: 20030234077
    Abstract: A method for separating a substrate and a thin-film material of an optical recording memory media using ultrasonic includes steps of placing an optical recording memory media in an ultrasonic environment and using ultrasonic to damage weaker interconnected interfaces of the optical recording memory media, thereby enabling the interconnected interfaces to absorb energies for attenuating or losing adhesive forces thereof with other layers. The entire method has simple operations, authentically completes the separation, facilitates high quality recycling of substrates and thin-film materials of optical recording memory media s, and effectively avoids possible re-contamination during the recycling process.
    Type: Application
    Filed: June 10, 2003
    Publication date: December 25, 2003
    Inventors: Jenn-Shing Wang, Pei-Chao Cheng
  • Publication number: 20030234076
    Abstract: A method for separating optical recording memory media substrate and its thin film material. It is to place the optical recording memory media under the electromagnetic wave environment, by the nature of electromagnetic wave characteristic to focus large amount of energy onto the optical recording memory media thin film layer, to break the bonding between the substrate and the thin film layer and effect an thorough separation between the substrate and the thin film layer. It is a simple method with easy operation, low cost, quick and thorough separation. It makes possible the high quality recovery of the substrate and thin film layer; it also eliminates any secondary pollution in the process.
    Type: Application
    Filed: May 21, 2003
    Publication date: December 25, 2003
    Inventors: Jenn-Shing Wang, Pei-Chao Cheng