Patents by Inventor Chuan FU

Chuan FU 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: 5924007
    Abstract: A method of improving the planarization of inter-poly dielectric layers. On a semiconductor device on which a poly-silicon layer is formed, by using atmosphere chemical vapor deposition, an undoped inter-poly dielectric layer is formed. A doped inter-poly dielectric layer is formed on the undoped inter-poly dielectric layer. Under a high temperature, reflow and etching back operations are performed for the doped inter-poly dielectric layer. Before a second poly-silicon layer is formed, a rapid thermal process is performed.
    Type: Grant
    Filed: August 14, 1997
    Date of Patent: July 13, 1999
    Assignee: United Microelectronics Corp.
    Inventors: Chia-Wen Liang, Jason Jenq, Chuan-Fu Wang, Sun-Chieh Chien
  • Patent number: 5913129
    Abstract: A method of fabricating a capacitor structure for a dynamic random access memory. This method comprises the following steps: a transistor is provided on a semiconductor substrate, and spacers are formed over the sidewalls of a gate electrode of the transistor. A first oxide layer is formed over the transistor. A bit line is deposited to contact with the source region of the transistor. Thereafter, a second oxide layer is formed over the bit line. A contact opening is formed exposing the drain region. Then the hemispherical grained silicon layer is formed into the contact opening. A polysilicon layer is formed over the hemispherical grained silicon layer. Therefore both the hemispherical grained silicon layer and the third polysilicon layer have rough surfaces. Subsequent conventional processes for the complete formation of capacitor structure are performed. It is therefore the capacitor maintains a required capacitance while reducing the horizontal dimensions of the storage capacitor.
    Type: Grant
    Filed: January 12, 1998
    Date of Patent: June 15, 1999
    Assignee: United Microelectronics Corp.
    Inventors: Der-Yuan Wu, Chuan-Fu Wang
  • Patent number: 5879987
    Abstract: A structure of a capacitor in a DRAM includes: A dielectric layer with a contact window for later connecting use is formed on a substrate. Then, a first-conductive layer is formed over the dielectric and is coupled to either the source or the drain of a TFET through the contact window. Subsequently, a number of insulating layers and second-conductive layers are superposed alternatively together to form a stacked layer. By using the space occupied by the insulating layers, a number of third-conductive layers replacing the inner portion of the insulating layers are formed in between the second-conductive layers. After removing the insulating layers between the second-conductive layers, a structure of a horn-like in a sectional view is formed. The first-conductive layer, the second-conductive layers and the third-conductive layers are coupled together to act as a lower electrode of the capacitor. Then, a dielectric thin film is formed over the lower electrode.
    Type: Grant
    Filed: May 14, 1998
    Date of Patent: March 9, 1999
    Inventor: Chuan-Fu Wang
  • Patent number: 5277291
    Abstract: A waste collecting machine comprising a housing having two entrances for waste metal cans and glass bottles, a mechanical arm to collect and deliver waste metal cans or glass bottles into said entrances respectively, a roller ramming mechanism to crush waste metal cans out of shape, a metal detector to detect metal cans from glass bottles, an electromagnet controlled by said metal detector to shift a sub-slide way to the left or right according to detection result, a counting device to count the number of waste cans or glass bottles passing thereby, and a refund device to give coins in return for the waste cans or bottles received.
    Type: Grant
    Filed: March 29, 1991
    Date of Patent: January 11, 1994
    Inventor: Chuan-Fu Chin
  • Patent number: 4940925
    Abstract: A visual navigation system provides absolute position information to multiple automatically guided vehicles (AGVs) such as mobile robots. The beacon-equipped AGVs emit light visible to overhead television cameras. The beacons are arranged and controlled so that the vision systems can acquire, measure, and report the locations of multiple AGVs. The system controller incorporates a programmable "factory map", or knowledge base, of allowable paths of travel for the AGVs, which navigate by dead reckoning with periodic position updates from the visual navigation system. The visual navigation system notifies the autonomous AGVs and the system controller when an AGV strays from its command path. The combination of computer controls in the elements of the system provides the means to stop and to recover straying AGVs. The navigation system visually monitors normal AGV travel, off-course corrections, "lost" AGV searches, and recovery. Thus, it provides closed-loop, servo-like operation.
    Type: Grant
    Filed: October 31, 1988
    Date of Patent: July 10, 1990
    Assignee: Texas Instruments Incorporated
    Inventors: Martin A. Wand, Anh V. Ho, Chuan-Fu Lin, Phen-Lan Huang, John P. Williston, Haradon J. Rice, Thomas J. Doty
  • Patent number: D323313
    Type: Grant
    Filed: November 16, 1989
    Date of Patent: January 21, 1992
    Inventor: Chuan-Fu Li
  • Patent number: D327774
    Type: Grant
    Filed: November 16, 1989
    Date of Patent: July 14, 1992
    Inventor: Chuan-Fu Li