Patents by Inventor Yi-Chih Chang

Yi-Chih 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: 20200172393
    Abstract: Methods for improving wafer bonding performance are disclosed herein. In some embodiments, a method for bonding a pair of semiconductor substrates is disclosed. The method includes: processing at least one of the pair of semiconductor substrates, and bonding the pair of semiconductor substrates together. Each of the pair of semiconductor substrates is processed by: performing at least one chemical vapor deposition (CVD), and performing at least one chemical mechanical polishing (CMP). One of the at least one CVD is performed after all CMP performed before bonding.
    Type: Application
    Filed: November 26, 2019
    Publication date: June 4, 2020
    Inventors: Chien-Wei CHANG, Ya-Jen SHEUH, Ren-Dou LEE, Yi-Chih CHANG, Yi-Hsun CHIU, Yuan-Hsin CHI
  • Patent number: 10613647
    Abstract: A portable electronic device includes a stylus including a pen-shaped casing structure, a support structure, a rear circuit board, a function assembly, a pen head structure and a power supply. The support structure is disposed in the casing structure. The rear circuit board is positioned on the support structure. The function assembly is disposed on the support structure. The head structure is partially disposed out of the casing structure. The power supply is electrically connected to the rear circuit board. The function assembly includes first, second and third conductive members, first and second movable members, and a button body. When the button body is pressed to drive the first and second movable members to move simultaneously, the first movable member simultaneously electrically contacts the first and second conductive members, so the first and the second conductive members are electrically connected with each other through the first movable member.
    Type: Grant
    Filed: June 14, 2018
    Date of Patent: April 7, 2020
    Assignee: WALTOP INTERNATIONAL CORPORATION
    Inventor: Yi-Chih Chang
  • Patent number: 10599272
    Abstract: The present disclosure provides a portable electronic device and an active capacitive stylus thereof. The active capacitive stylus includes a pen-shaped casing structure, a support structure, a circuit substrate, a sensor module, an elastic assembly, an abutting assembly, a pen head structure and a power supply component. The circuit substrate is positioned on the support structure. The sensor module is electrically connected to the circuit substrate. The elastic assembly includes a flexible holder contacting the sensor module and a flexible element disposed between the flexible holder and the sensor module. The abutting assembly is disposed inside the pen-shaped casing structure to abut against the flexible holder. The pen head structure, the abutting assembly, the elastic assembly and the sensor module are abutted one to another, so that there is no gap between two of the pen head structure, the abutting assembly, the elastic assembly and the sensor module.
    Type: Grant
    Filed: June 26, 2017
    Date of Patent: March 24, 2020
    Assignee: WALTOP INTERNATIONAL CORPORATION
    Inventor: Yi-Chih Chang
  • Patent number: 10564737
    Abstract: This invention discloses a capacitive stylus including a pen housing and an eraser for being applied to a touch device. The pen housing includes a tip for emitting an input signal, and the eraser can emit an erasing signal to the touch device. The intensity or erasing range of the erasing signal is determined by the pressure that the eraser exerted on the touch device. In addition, the eraser can trigger a signal to instruct the touch device performing an application.
    Type: Grant
    Filed: August 2, 2018
    Date of Patent: February 18, 2020
    Assignee: Waltop International Corporation
    Inventors: Chia-Jui Yeh, Yi-Chih Chang
  • Publication number: 20200050340
    Abstract: A message erasing device and a message erasing system, and the message erasing system includes a message erasing device and a message receiving device. The message erasing device includes a device body, a processing module, and an erasing module. The device body touches the message receiving device by a clearing unit and erases an actual message of the message receiving device, and the movable unit touches the processing module according to the clearing unit touching the message receiving device, so that the processing module generates an erasing signal to the message receiving device. The message receiving device provides a clear signal to an electronic device according to the erasing signal.
    Type: Application
    Filed: August 7, 2019
    Publication date: February 13, 2020
    Inventors: YI-CHIH CHANG, YING-HWA TANG
  • Patent number: 10429956
    Abstract: This invention discloses a capacitive stylus including a pen housing and a detachable eraser. The pen housing comprises a rear end section and a thinning section with a thinner wall thickness than that of the rear end section. A compressible latch is disposed at the outer surface of the eraser. The rear end section includes an axial groove. By pushing the latch to pass through the axial groove into the thinning section and rotating the latch within the thinning section, the pen housing is combined with the eraser.
    Type: Grant
    Filed: August 1, 2018
    Date of Patent: October 1, 2019
    Assignee: Waltop International Corporation
    Inventors: Chia-Jui Yeh, Yi-Chih Chang
  • Publication number: 20190272049
    Abstract: A portable electronic device includes a stylus including a pen-shaped casing structure, a support structure, a rear circuit board, a function assembly, a pen head structure and a power supply. The support structure is disposed in the casing structure. The rear circuit board is positioned on the support structure. The function assembly is disposed on the support structure. The head structure is partially disposed out of the casing structure. The power supply is electrically connected to the rear circuit board. The function assembly includes first, second and third conductive members, first and second movable members, and a button body. When the button body is pressed to drive the first and second movable members to move simultaneously, the first movable member simultaneously electrically contacts the first and second conductive members, so the first and the second conductive members are electrically connected with each other through the first movable member.
    Type: Application
    Filed: June 14, 2018
    Publication date: September 5, 2019
    Inventor: YI-CHIH CHANG
  • Publication number: 20190056806
    Abstract: This invention discloses a capacitive stylus including a pen housing and a detachable eraser. The pen housing comprises a rear end section and a thinning section with a thinner wall thickness than that of the rear end section. A compressible latch is disposed at the outer surface of the eraser. The rear end section includes an axial groove. By pushing the latch to pass through the axial groove into the thinning section and rotating the latch within the thinning section, the pen housing is combined with the eraser.
    Type: Application
    Filed: August 1, 2018
    Publication date: February 21, 2019
    Inventors: Chia-Jui Yeh, Yi-Chih Chang
  • Publication number: 20190056807
    Abstract: This invention discloses a capacitive stylus including a pen housing and an eraser for being applied to a touch device. The pen housing includes a tip for emitting an input signal, and the eraser can emit an erasing signal to the touch device. The intensity or erasing range of the erasing signal is determined by the pressure that the eraser exerted on the touch device. In addition, the eraser can trigger a signal to instruct the touch device performing an application.
    Type: Application
    Filed: August 2, 2018
    Publication date: February 21, 2019
    Inventors: Chia-Jui Yeh, Yi-Chih Chang
  • Publication number: 20180260048
    Abstract: The present disclosure provides a portable electronic device and an active capacitive stylus thereof. The active capacitive stylus includes a pen-shaped casing structure, a support structure, a circuit substrate, a sensor module, an elastic assembly, an abutting assembly, a pen head structure and a power supply component. The circuit substrate is positioned on the support structure. The sensor module is electrically connected to the circuit substrate. The elastic assembly includes a flexible holder contacting the sensor module and a flexible element disposed between the flexible holder and the sensor module. The abutting assembly is disposed inside the pen-shaped casing structure to abut against the flexible holder. The pen head structure, the abutting assembly, the elastic assembly and the sensor module are abutted one to another, so that there is no gap between two of the pen head structure, the abutting assembly, the elastic assembly and the sensor module.
    Type: Application
    Filed: June 26, 2017
    Publication date: September 13, 2018
    Inventor: YI-CHIH CHANG
  • Patent number: 10042444
    Abstract: A capacitive stylus with two transmit electrodes is disclosed. The two transmit electrodes are isolated and shielded so that the transmit terminals of the transmit electrodes are spaced with a distance.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: August 7, 2018
    Assignee: Waltop International Corporation
    Inventors: Chia-Jui Yeh, Yi-Chih Chang
  • Publication number: 20180120958
    Abstract: A capacitive stylus with two transmit electrodes is disclosed. The two transmit electrodes are isolated and shielded so that the transmit terminals of the transmit electrodes are spaced with a distance.
    Type: Application
    Filed: December 16, 2016
    Publication date: May 3, 2018
    Inventors: Chia-Jui Yeh, Yi-Chih Chang
  • Publication number: 20170242501
    Abstract: A capacitive stylus with a replaceable conductive nib is disclosed. The capacitive stylus comprises a combination of a replaceable conductive nib and a tip.
    Type: Application
    Filed: March 14, 2016
    Publication date: August 24, 2017
    Inventors: Ying-Hwa Tang, Yi-Chih Chang, Hsin-Chiang Ho
  • Patent number: 9703401
    Abstract: A portable electronic device uses a miniaturization rechargeable capacitive stylus including a pen-shaped metal casing structure, a support structure, a circuit substrate, a sensor module, a pen head structure, an electrical connector structure, and a power supply component. The pen-shaped metal casing structure has a retaining convex portion. The electrical connector structure includes a carrier substrate positioned on the support structure and an electrical connector disposed on the carrier substrate, and the electrical connector has an electrical connection portion exposed from the pen-shaped metal casing structure.
    Type: Grant
    Filed: December 1, 2015
    Date of Patent: July 11, 2017
    Assignee: WALTOP INTERNATIONAL CORPORATION
    Inventor: Yi-Chih Chang
  • Publication number: 20170108962
    Abstract: A capacitive whiteboard eraser is disclosed. The capacitive whiteboard eraser includes an eraser body, a control circuit board, an emitting electrode and a tact switch. The eraser body is for a user to hold the capacitive whiteboard eraser with hand. The control circuit board is disposed in the eraser body and configured to generate an erasing control signal. The emitter electrode is disposed on a housing of the eraser body, electrically connected with the control circuit board, and configured to transmit the erasing control signal. The tact switch is dispose on the control circuit board, and when the tact switch is turned on, the control circuit board correspondingly generates and transmits the erasing control signal to the emitting electrode, in order to transmit the erasing control signal to a capacitive whiteboard for performing an erasing procedure.
    Type: Application
    Filed: November 18, 2015
    Publication date: April 20, 2017
    Inventors: YING HWA TANG, YI CHIH CHANG
  • Publication number: 20170108953
    Abstract: The capacitive stylus includes a pen tube, an upper skeleton structure, a lower skeleton structure, a pen cover, a refill, a refill holder, a trigger element, a spring, a control circuit board, a pressure sensing element and an adjusting element. The pen cover is connected with the pen tube by the upper skeleton structure and the lower skeleton structure. The trigger element is inserted in another end of the refill holder. The pressure sensing element is electrically connected with the control circuit board and disposed in accordance with the trigger element. When the refill and the refill holder press the spring so that the trigger element contacts the pressure sensing element, the pressure sensing element detects the pressure force against the refill. The adjusting element is configured to adjust the gap between the pressure sensing element and the trigger element.
    Type: Application
    Filed: November 16, 2015
    Publication date: April 20, 2017
    Inventors: CHUNG-FUU MAO, YI-CHIH CHANG
  • Publication number: 20170108956
    Abstract: A capacitive stylus is disclosed. The capacitive stylus comprises an elastomer and a sensor holder, which can effectively buffer and disperse the impact transmitted from a nib so as to protect internal components of the capacitive stylus.
    Type: Application
    Filed: December 30, 2015
    Publication date: April 20, 2017
    Inventors: YING-HWA TANG, YI-CHIH CHANG
  • Patent number: 9626011
    Abstract: A rechargeable capacitive stylus includes a pen-shaped casing structure, a sensor module, a pen head structure, and an electrical connector structure. The pen-shaped casing structure has a pen casing, a rotatable ring rotatably disposed around the pen casing, and a pen holder adjacent to the rotatable ring. The sensor module is disposed inside the pen-shaped casing structure. The pen head structure is movably disposed inside the pen-shaped casing structure to selectively contact the sensor module. The electrical connector structure is disposed inside the pen-shaped casing structure. The electrical connector structure includes a first electrical connector electrically connected to a power supply, and the first electrical connector has a first electrical connection portion. The pen casing has a first fixed opening for exposing the first electrical connection portion, and the rotatable ring has a movable opening that is moved relative to the pen casing or the pen holder.
    Type: Grant
    Filed: July 31, 2015
    Date of Patent: April 18, 2017
    Assignee: WALTOP INTERNATIONAL CORPORATION
    Inventor: Yi Chih Chang
  • Patent number: 9606642
    Abstract: A portable electronic device uses a miniaturization rechargeable capacitive stylus including a pen-shaped casing structure, a support structure, a circuit substrate, a sensor module, a pen head structure, an electrical connector structure, and a power supply component. The pen-shaped casing structure has a retaining convex portion. The electrical connector structure includes a carrier substrate positioned on the support structure and an electrical connector disposed on the carrier substrate, and the electrical connector has an electrical connection portion exposed from the pen-shaped casing structure. When the pen-shaped casing structure is inserted into a receiving space of the portable electronic device, the pen-shaped casing structure is positioned inside the receiving space of the portable electronic device by matching the retaining convex portion of the pen-shaped casing structure and a retaining concave portion that is disposed inside the receiving space of the portable electronic device.
    Type: Grant
    Filed: August 22, 2015
    Date of Patent: March 28, 2017
    Assignee: WALTOP INTERNATIONAL CORPORATION
    Inventor: Yi Chih Chang
  • Publication number: 20170075440
    Abstract: A portable electronic device uses a miniaturization rechargeable capacitive stylus including a pen-shaped metal casing structure, a support structure, a circuit substrate, a sensor module, a pen head structure, an electrical connector structure, and a power supply component. The pen-shaped metal casing structure has a retaining convex portion. The electrical connector structure includes a carrier substrate positioned on the support structure and an electrical connector disposed on the carrier substrate, and the electrical connector has an electrical connection portion exposed from the pen-shaped metal casing structure.
    Type: Application
    Filed: December 1, 2015
    Publication date: March 16, 2017
    Inventor: YI-CHIH CHANG