Patents by Inventor Hung-Lin Chang

Hung-Lin 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: 20180302992
    Abstract: A manufacturing method of a circuit board structure is described as follows. An inner circuit structure including a core layer having an upper and an opposite lower surface, a first patterned circuit layer disposed on the upper surface and a second patterned circuit layer disposed on the lower surface is provided. An insulating material layer is formed on a portion of the first patterned circuit layer. A laser resisting layer is formed on at least a portion of the insulating material layer. A release layer is adhered to the laser resisting layer. A build-up process is performed so as to laminate a first and a second build-up circuit structures on the first and the second patterned circuit layers, respectively. A laser ablation process is performed on the first build-up circuit structure so as to form a cavity at least exposing a portion of the upper surface of the core layer.
    Type: Application
    Filed: June 21, 2018
    Publication date: October 18, 2018
    Applicant: Unimicron Technology Corp.
    Inventors: Hung-Lin Chang, Ming-Hao Wu, Syun-Siao Chang, Cheng-Po Yu, Chi-Min Chang
  • Patent number: 10051748
    Abstract: A manufacturing method of a circuit board structure is described as follows. An inner circuit structure including a core layer having an upper and an opposite lower surface, a first patterned circuit layer disposed on the upper surface and a second patterned circuit layer disposed on the lower surface is provided. An insulating material layer is formed on a portion of the first patterned circuit layer. A laser resisting layer is formed on at least a portion of the insulating material layer. A release layer is adhered to the laser resisting layer. A build-up process is performed so as to laminate a first and a second build-up circuit structures on the first and the second patterned circuit layers, respectively. A laser ablation process is performed on the first build-up circuit structure so as to form a cavity at least exposing a portion of the upper surface of the core layer.
    Type: Grant
    Filed: January 18, 2016
    Date of Patent: August 14, 2018
    Assignee: Unimicron Technology Corp.
    Inventors: Hung-Lin Chang, Ming-Hao Wu, Syun-Siao Chang, Cheng-Po Yu, Chi-Min Chang
  • Patent number: 10015835
    Abstract: Methods and apparatus are provided to reduce service interruption for intra-RAT and inter-RAT handover procedures. The UE performs a NAS signaling procedure via a NAS signaling connection in a mobile communication network. The UE monitors a radio resource status and determines whether a radio bearer has been or is being established for a RRC connection for data transmission. The UE determines whether to release the NAS signaling connection after completing the NAS signaling procedure based on whether the radio bearer has been established. In one embodiment, the UE monitors a radio resource status and determines whether a radio bearer has been established for a RRC connection for data transmission. The UE determines whether to start a timer upon completing the NAS signaling procedure based on whether the radio bearer has been or is being established.
    Type: Grant
    Filed: September 22, 2017
    Date of Patent: July 3, 2018
    Assignee: MEDIATEK INC.
    Inventors: Yu-Syuan Jheng, Chien-Chun Huang-Fu, Hung-Lin Chang, Yuan-Chieh Lin
  • Publication number: 20180014349
    Abstract: Methods and apparatus are provided to reduce service interruption for intra-RAT and inter-RAT handover procedures. The UE performs a NAS signaling procedure via a NAS signaling connection in a mobile communication network. The UE monitors a radio resource status and determines whether a radio bearer has been or is being established for a RRC connection for data transmission. The UE determines whether to release the NAS signaling connection after completing the NAS signaling procedure based on whether the radio bearer has been established. In one embodiment, the UE monitors a radio resource status and determines whether a radio bearer has been established for a RRC connection for data transmission. The UE determines whether to start a timer upon completing the NAS signaling procedure based on whether the radio bearer has been or is being established.
    Type: Application
    Filed: September 22, 2017
    Publication date: January 11, 2018
    Inventors: Yu-Syuan Jheng, Chien-Chun Huang-Fu, Hung-Lin Chang, Yuan-Chieh Lin
  • Patent number: 9814090
    Abstract: Methods and apparatus are provided to reduce service interruption for intra-RAT and inter-RAT handover procedures. The UE performs a NAS signaling procedure via a NAS signaling connection in a mobile communication network. The UE monitors a radio resource status and determines whether a radio bearer has been or is being established for a RRC connection for data transmission. The UE determines whether to release the NAS signaling connection after completing the NAS signaling procedure based on whether the radio bearer has been established. In one embodiment, the UE monitors a radio resource status and determines whether a radio bearer has been established for a RRC connection for data transmission. The UE determines whether to start a timer upon completing the NAS signaling procedure based on whether the radio bearer has been or is being established.
    Type: Grant
    Filed: March 11, 2015
    Date of Patent: November 7, 2017
    Assignee: MEDIATEK INC.
    Inventors: Yu-Syuan Jheng, Chien-Chun Huang-Fu, Hung-Lin Chang, Yuan-Chieh Lin
  • Publication number: 20170196095
    Abstract: A circuit board includes a core layer, at least one metal contraposition component and at least one build-up circuit structure. The metal contraposition component is disposed on the core layer. The build-up circuit structure is disposed on the core layer and covers the metal contraposition component by using a position of the metal contraposition component as a fiducial mark.
    Type: Application
    Filed: March 1, 2016
    Publication date: July 6, 2017
    Inventors: Hung-Lin Chang, Chen-Wei Tseng
  • Patent number: 9686866
    Abstract: A package structure includes a circuit substrate, at least one electronic component, and a connecting slot. The circuit substrate includes at least one core layer, a build-up structure including at least three patterned circuit layers, at least two dielectric layers and conductive through holes, and circuit pads. The electronic component is embedded in at least one of the dielectric layers and located in a disposition area. The electronic component is electrically connected to one of the patterned circuit layers through a portion of the conductive through holes. The connecting slot has a bottom portion, a plurality of sidewall portions connecting the bottom portion, and a plurality of connecting pads located on the sidewall portions. The circuit substrate is assembled to the bottom portion, and the circuit pads are electrically connected to the connecting pads through a bent area of the core layer that is bent relative to the disposition area.
    Type: Grant
    Filed: August 23, 2015
    Date of Patent: June 20, 2017
    Assignee: Unimicron Technology Corp.
    Inventors: Hung-Lin Chang, Ta-Han Lin
  • Publication number: 20170164468
    Abstract: A manufacturing method of a circuit board structure is described as follows. An inner circuit structure including a core layer having an upper and an opposite lower surface, a first patterned circuit layer disposed on the upper surface and a second patterned circuit layer disposed on the lower surface is provided. An insulating material layer is formed on a portion of the first patterned circuit layer. A laser resisting layer is formed on at least a portion of the insulating material layer. A release layer is adhered to the laser resisting layer. A build-up process is performed so as to laminate a first and a second build-up circuit structures on the first and the second patterned circuit layers, respectively. A laser ablation process is performed on the first build-up circuit structure so as to form a cavity at least exposing a portion of the upper surface of the core layer.
    Type: Application
    Filed: January 18, 2016
    Publication date: June 8, 2017
    Inventors: HUNG-LIN CHANG, MING-HAO WU, SYUN-SIAO CHANG, CHENG-PO YU, CHI-MIN CHANG
  • Publication number: 20170142645
    Abstract: A communications apparatus includes a radio transceiver, a memory device and a processor. The radio transceiver transmits or receives wireless radio frequency signals to or from an air interface. The memory device stores a registration database including one or more sets of registration data. Each set of registration data corresponds to an International Mobile Subscriber Identity (IMSI). The processor determines whether performing a PLMN search procedure is required, and when performing a PLMN search procedure is required, the processor retrieves suitable registration data from the registration database according to a currently used IMSI and performs the PLMN search procedure via the radio transceiver based on the retrieved suitable registration data.
    Type: Application
    Filed: October 27, 2016
    Publication date: May 18, 2017
    Inventors: Kun-Lin WU, Hung-Lin CHANG, Chih-Hung LEE, Yuh-Hwang YOU, Ming LEE, Yu-Cheng HUANG
  • Publication number: 20170055349
    Abstract: A package structure includes a circuit substrate, at least one electronic component, and a connecting slot. The circuit substrate includes at least one core layer, a build-up structure including at least three patterned circuit layers, at least two dielectric layers and conductive through holes, and circuit pads. The electronic component is embedded in at least one of the dielectric layers and located in a disposition area. The electronic component is electrically connected to one of the patterned circuit layers through a portion of the conductive through holes. The connecting slot has a bottom portion, a plurality of sidewall portions connecting the bottom portion, and a plurality of connecting pads located on the sidewall portions. The circuit substrate is assembled to the bottom portion, and the circuit pads are electrically connected to the connecting pads through a bent area of the core layer that is bent relative to the disposition area.
    Type: Application
    Filed: August 23, 2015
    Publication date: February 23, 2017
    Inventors: Hung-Lin Chang, Ta-Han Lin
  • Publication number: 20150264741
    Abstract: Methods and apparatus are provided to reduce service interruption for intra-RAT and inter-RAT handover procedures. The UE performs a NAS signaling procedure via a NAS signaling connection in a mobile communication network. The UE monitors a radio resource status and determines whether a radio bearer has been or is being established for a RRC connection for data transmission. The UE determines whether to release the NAS signaling connection after completing the NAS signaling procedure based on whether the radio bearer has been established. In one embodiment, the UE monitors a radio resource status and determines whether a radio bearer has been established for a RRC connection for data transmission. The UE determines whether to start a timer upon completing the NAS signaling procedure based on whether the radio bearer has been or is being established.
    Type: Application
    Filed: March 11, 2015
    Publication date: September 17, 2015
    Inventors: Yu-Syuan Jheng, Chien-Chun Huang-Fu, Hung-Lin Chang, Yuan-Chieh Lin
  • Patent number: 8995989
    Abstract: A method of applying a network forbidden list for enhanced service recovery in mobile communication networks is provided. In a first embodiment, upon receiving an error cause for a RAT in a selected network, a UE stores a PLMN ID, the RAT information, and the error cause as an entry in the forbidden list. The UE will not select to the RAT of the network stored in the forbidden list until the PLMN/RAT entry is removed from the forbidden list. In a second embodiment, upon receiving an error cause in a selected network, a UE stores a PLMN ID, the error cause, and a timer value as an entry in the forbidden list. The UE will not select to the network stored in the forbidden list until the timer associated with the PLMN ID is expired.
    Type: Grant
    Filed: May 21, 2013
    Date of Patent: March 31, 2015
    Assignee: Mediatek Inc.
    Inventors: Yu-Syuan Jheng, Hung-Lin Chang
  • Publication number: 20150053462
    Abstract: A wiring board structure adapted to carry a heat generating component is provided. The wiring board structure includes a core layer, an active cooler, a dielectric layer and a plurality of conductive vias. The core layer has a cavity penetrating through the core layer. The active cooler includes a cold surface and a hot surface. The active cooler is disposed in the cavity. The dielectric layer covers the core layer and fills a gap between the active cooler and the cavity. The heat-generating component is disposed on an outer surface of the dielectric layer. The conductive vias are disposed in the dielectric layer and connecting the cold surface and the outer surface to connect the heat-generating component and the active cooler. A wiring board structure having an active cooling via is also provided.
    Type: Application
    Filed: October 25, 2013
    Publication date: February 26, 2015
    Applicant: Unimicron Technology Corp.
    Inventors: Ming-Hao Wu, Wei-Ming Cheng, Hung-Lin Chang
  • Publication number: 20130316699
    Abstract: A method of applying a network forbidden list for enhanced service recovery in mobile communication networks is provided. In a first embodiment, upon receiving an error cause for a RAT in a selected network, a UE stores a PLMN ID, the RAT information, and the error cause as an entry in the forbidden list. The UE will not select to the RAT of the network stored in the forbidden list until the PLMN/RAT entry is removed from the forbidden list. In a second embodiment, upon receiving an error cause in a selected network, a UE stores a PLMN ID, the error cause, and a timer value as an entry in the forbidden list. The UE will not select to the network stored in the forbidden list until the timer associated with the PLMN ID is expired.
    Type: Application
    Filed: May 21, 2013
    Publication date: November 28, 2013
    Applicant: MEDIATEK, INC.
    Inventors: Yu-Syuan Jheng, Hung-Lin Chang
  • Patent number: 8296944
    Abstract: A method for manufacturing a printed circuit board includes the steps of: providing a base board having a first surface layer; performing a first patterning process to the base board to form a bottom circuit on the first surface layer; forming a metal protection layer on the bottom circuit; performing a second patterning process to the metal protection layer to form a patterned metal protection layer; performing a build-up process to the base board to form a first built-up layer on the bottom circuit and the patterned metal protection layer; performing a third patterning process to the first built-up layer to form a first built-up layer circuit; performing a laser manufacturing process to the first built-up layer to form a cavity structure; and clearing the patterned metal protection layer.
    Type: Grant
    Filed: May 26, 2010
    Date of Patent: October 30, 2012
    Assignee: Unimicron Technology Corp.
    Inventors: Hung-Lin Chang, Chen-Chuan Chang
  • Publication number: 20100299917
    Abstract: A method for manufacturing a printed circuit board is disclosed. The method comprises the steps of: providing a base board, wherein the base board comprises a first surface layer; performing a first patterning process to the base board to form a bottom circuit on the first surface layer; forming a metal protection layer on the bottom circuit; performing a second patterning process to the metal protection layer to form a patterned metal protection layer; performing a build-up process to the base board to form a first built-up layer on the bottom circuit and the patterned metal protection layer; performing a third patterning process to the first built-up layer to form a first built-up layer circuit; performing a laser manufacturing process to the first built-up layer to form a cavity structure; and clearing the patterned metal protection layer.
    Type: Application
    Filed: May 26, 2010
    Publication date: December 2, 2010
    Inventors: Hung-Lin Chang, Chen-Chuan Chang
  • Publication number: 20090063733
    Abstract: The invention provides an input/output port (I/O port) switch structure of an electronic device. The electronic device comprises a motherboard, and an opening is installed on a predetermined position of the electronic device. The switch structure is installed on the motherboard of the electronic device and a corresponding opening is installed on a side of the electronic device. The I/O port switch structure comprises a base and an operation unit, wherein the base is electrically connected to the motherboard and is used for installing a plurality of I/O ports with different functions. The operation portion is connected to the base to let the base perform a rotating motion at a predetermined angle, and the user can therefore switch and use the required I/O port by operating switch elements.
    Type: Application
    Filed: December 19, 2007
    Publication date: March 5, 2009
    Inventors: Cheng Ho Huang, Hung Lin Chang
  • Publication number: 20090056097
    Abstract: An assembly and disassembly device for a display monitor and a method are disclosed. The assembly and disassembly device of the present invention is used to assemble the display monitor to a seat and to disassemble the display monitor from the seat body. The assembly and disassembly device of the present invention comprises a lockup portion connected to the seat body and a framework portion connected to the display monitor. The lockup portion has at least a locking body, and the framework portion has a connecting body. The fastening body has an opening and a guiding slot, and the opening is connected with the guiding slot. When the locking body moves from the opening to the guiding slot, the lockup portion can be securely fastened to the framework portion, thereby installing the display monitor to the seat body.
    Type: Application
    Filed: January 23, 2008
    Publication date: March 5, 2009
    Inventors: Cheng Ho Huang, Hung Lin Chang
  • Patent number: 7494349
    Abstract: The invention provides an input/output port (I/O port) switch structure of an electronic device. The electronic device comprises a motherboard, and an opening is installed on a predetermined position of the electronic device. The switch structure is installed on the motherboard of the electronic device and a corresponding opening is installed on a side of the electronic device. The I/O port switch structure comprises a base and an operation unit, wherein the base is electrically connected to the motherboard and is used for installing a plurality of I/O ports with different functions. The operation portion is connected to the base to let the base perform a rotating motion at a predetermined angle, and the user can therefore switch and use the required I/O port by operating switch elements.
    Type: Grant
    Filed: December 19, 2007
    Date of Patent: February 24, 2009
    Assignee: Elitegroup Computer Systems Co., Ltd.
    Inventors: Cheng Ho Huang, Hung Lin Chang
  • Patent number: 7207843
    Abstract: A spark leakage shutoff protective device for a plug includes an upright snapping lever, a leakage detection electromagnetic valve, a restoring member, and an upright support wall. The snapping lever is located between the restoring member and the leakage detection electromagnetic valve. Thus, the snapping lever is hidden in the restoring member to reduce the volume of the spark leakage shutoff protective device so that the spark leakage shutoff protective device occupies a smaller space in the plug. In addition, the snapping lever is supported by the support wall, so that the snapping lever is not easily deformed or worn out during a long-term utilization, thereby enhancing the lifetime of the snapping lever.
    Type: Grant
    Filed: April 24, 2006
    Date of Patent: April 24, 2007
    Inventor: Hung-Lin Chang