Patents by Inventor Min-Chen Chang

Min-Chen 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).

  • Publication number: 20240145575
    Abstract: A semiconductor device includes a substrate, a channel layer, a first barrier layer, a source/drain contact, and a gate layer. The channel layer is on the substrate. The first barrier layer is on the channel layer and the thickness of the first barrier layer is less than 6 nm. The source/drain contact is on the first barrier layer and is directly contact with the first barrier layer. The gate layer is over the first barrier layer.
    Type: Application
    Filed: May 3, 2023
    Publication date: May 2, 2024
    Inventors: Edward Yi CHANG, You-Chen WENG, Min-Lu KAO
  • Publication number: 20240136432
    Abstract: A high electron mobility transistor includes a growth substrate, a lattice matching layer, an back-barrier layer, an electron blocking layer, a channel layer, an active layer, a source, a gate, and a drain. The lattice matching layer and the back-barrier layer are formed on the growth substrate. The back-barrier layer includes GaN doped with C. The electron blocking layer is formed on the back-barrier layer. The electron blocking layer includes AlGaN, wherein the doping percent of Al atoms of the AlGaN is 3˜5% and the doping percent of Ga atoms of the AlGaN is 95˜97%. The electron blocking layer has a thickness of 2˜5 nm. The channel layer and the active layer are formed on the electron blocking layer. The source, the gate, and the drain are formed on the active layer.
    Type: Application
    Filed: January 13, 2023
    Publication date: April 25, 2024
    Applicants: National Yang Ming Chiao Tung University, National Chung-Shan Institute of Science and Technology
    Inventors: Edward Yi CHANG, You-Chen WENG, Min-Lu KAO
  • Publication number: 20240136422
    Abstract: A high electron mobility transistor and a method for fabricating the same is disclosed. Firstly, a lattice matching layer, a channel layer, and an AlGaN layer are sequentially formed on a growth substrate. The AlGaN layer includes a first area, a second area, and a third area, wherein the second area is located between the first area and the third area. Then, an insulation block is formed on the second area of the AlGaN layer and two GaN blocks are respectively formed on the first area and the third area of the AlGaN layer. Two InAlGaN blocks are respectively formed on the GaN blocks and the insulation block is removed. Finally, a gate is formed to interfere the second area of the AlGaN layer and a source and a drain are respectively formed on the InAlGaN blocks.
    Type: Application
    Filed: January 13, 2023
    Publication date: April 25, 2024
    Applicants: National Yang Ming Chiao Tung University, National Chung-Shan Institute of Science and Technology
    Inventors: Edward Yi CHANG, You-Chen WENG, Min-Lu Kao
  • Patent number: 8172626
    Abstract: A three-pin electrical plug with improved terminal structure includes an earth pin, two terminals and a plug body. The terminal has a blade portion, a joint portion and a wire-gripping portion. The terminal further has a first axis passing through a widthwise center of the blade portion; a second axis being parallel to the first axis and passing through a widthwise center of the joint portion; and a third axis being parallel to both of the first axis and the second axis, and passing through a widthwise center the wire-gripping portion, wherein the third axis coincides with neither the first axis nor the second axis. Thereby, a mold for deforming the wire-gripping portion can have its side walls made thicker so as to extend the service life of the mold. Thus, the improved terminal structure is conductive to mass manufacturing of the plug in terms of both efficiency and cost.
    Type: Grant
    Filed: July 13, 2011
    Date of Patent: May 8, 2012
    Inventor: Min-Chen Chang
  • Patent number: 6857551
    Abstract: An auto-feed terminal wire clamping machine and its terminal structure. This invention can automatically sieve and randomly arrange the disordered terminal inner molds and feed them in an ordered direction to the feeding groove of such terminal wire clamper and automatically complete the terminal wire clamping operation.
    Type: Grant
    Filed: April 22, 2003
    Date of Patent: February 22, 2005
    Inventor: Min-Chen Chang
  • Publication number: 20040211813
    Abstract: An auto-feed terminal wire clamping machine and its terminal structure comprises a terminal wire clamper having a feeding groove, and the feeding groove at its rear end having a feeding push rod and at its front end having a terminal mold plate module that further comprising an upper mold plate and a lower mold plate; an aligning conveyer comprising an aligning groove with an opening at one end coupled to the side of the feeding groove; an auto aligning feeder having a vibratory disc on a machine table, and such vibratory disc having a spiral track that includes a positive and inverse alignment area, an angle alignment area, and an open position alignment area; wherein the spiral track is coupled to an opening at another end of the aligning groove; by the foregoing structure, this invention can automatically sieve and randomly arrange the disordered terminal inner molds and feed them in an ordered direction to the feeding groove of such terminal wire clamper and automatically complete the terminal wire clampi
    Type: Application
    Filed: April 22, 2003
    Publication date: October 28, 2004
    Inventor: Min-Chen Chang
  • Publication number: 20030207626
    Abstract: A terminal having a plug portion, and a wire clamp portion eccentrically connected to one end of the plug portion, the plug portion having two wide sides and two narrow sides, the wire clamp portion defining a mouth extended in direction same as one of the narrow side of the plug portion.
    Type: Application
    Filed: May 3, 2002
    Publication date: November 6, 2003
    Inventor: Min-Chen Chang
  • Patent number: 6544058
    Abstract: A changeable plug base structure includes a universal terminal base disposed on an electronic device with first, second and third terminal pieces exposed from the surface thereof. A removable type insert plate is insertable into the universal terminal base, and has at least one positive terminal and one negative terminal secured thereon. The front side of the removable type insert plate displays the shapes of the terminals. The back side of the removable type insert plate is provided with terminal contact points corresponding to the first, second and third terminal pieces. The universal terminal base provides extensive terminal contact positions to permit contact with removable type insert plates of different specifications so that the user can select suitable removable type insert plates for use therewith.
    Type: Grant
    Filed: December 31, 2001
    Date of Patent: April 8, 2003
    Inventor: Min-Chen Chang
  • Patent number: 6461195
    Abstract: A safety electric plug is constructed to include a negative pole metal blade connected to the negative pole of power supply, a positive pole metal blade, a bimetal contact member connected to the positive pole of power supply and disposed in contact with the positive pole metal blade, the bimetal contact member curving backwards from the positive pole metal blade to open the circuit upon an overcurrent, a spring member, and a sliding partition plate supported on the spring member and adapted to keep the bimetal contact member away from the positive pole metal blade after deformation of the bimetal contact member due to an overcurrent.
    Type: Grant
    Filed: March 12, 2001
    Date of Patent: October 8, 2002
    Inventor: Min-Chen Chang
  • Publication number: 20020127917
    Abstract: A safety electric plug is constructed to include a negative pole metal blade connected to the negative pole of power supply, a positive pole metal blade, a bimetal contact member connected to the positive pole of power supply and disposed in contact with the positive pole metal blade, the bimetal contact member curving backwards from the positive pole metal blade to open the circuit upon an overcurrent, a spring member, and a sliding partition plate supported on the spring member and adapted to keep the bimetal contact member away from the positive pole metal blade after deformation of the bimetal contact member due to an overcurrent.
    Type: Application
    Filed: March 12, 2001
    Publication date: September 12, 2002
    Inventor: Min-Chen Chang