Patents by Inventor Liren Yan

Liren Yan 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).

  • Composite One-Piece IGBT Device and Producing Method Thereof
    Publication number: 20140332847
    Abstract: A composite one-piece IGBT power device is disclosed to solve a problem that existing devices' turning-on/off speed is not high enough. The composite one-piece IGBT device of the present invention comprises at least two IGBT devices. Drift regions of the at least two IGBT devices connect with each other and electrodes of the at least two IGBT devices are led out separately from each other. The composite one-piece IGBT device may also consist of four IGBT devices. The drift regions of the four IGBT devices connect with each other. The composite IGBT device may also be embodied as two IGBT devices connected with each other. One of the two IGBT devices acts as a primary switching device for switching a large current, and the other acts as an auxiliary device for accelerating the switching action of the primary switching device. The composite IGBT device of the present invention is formed through a producing method which adds a few steps such as forming grooves to the conventional IGBT manufacturing process.
    Type: Application
    Filed: July 17, 2013
    Publication date: November 13, 2014
    Inventors: Liren Yan, Daoguang Liu, Zhihong Liu, Wei Zhang, Wei Zhou, Jie Cui