Patents by Inventor Kai-Jih SHIH

Kai-Jih SHIH 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: 11951571
    Abstract: A method of forming a package structure includes an etching step, a laser step, a plating step and a singulation step. In the etching step, a plurality of cutting streets of a leadframe are etched. In the laser step, a plastic package material covering on each of the cutting streets is removed via a laser beam. In the plating step, a plurality of plating surfaces are disposed on a plurality of areas of the leadframe without the plastic package material. In the singulation step, the cutting streets of the leadframe are cut to form the package structure.
    Type: Grant
    Filed: February 2, 2023
    Date of Patent: April 9, 2024
    Assignee: INTEGRATED SILICON SOLUTION INC.
    Inventors: Cheng-Fu Yu, Kai-Jih Shih, Yi-Jung Liu
  • Publication number: 20240047313
    Abstract: A package structure includes a leadframe, at least two dies, at least one spacer and a plastic package material. The leadframe includes a die pad. The dies are disposed on the die pad of the leadframe. The spacer is disposed between at least one of the dies and the die pad. The plastic package material is disposed on the leadframe, and covers the dies. A first minimum spacing distance is between one of a plurality of edges of the spacer and one of a plurality of edges of the die pad, a second minimum spacing distance is between one of a plurality of edges of the dies and one of the edges of the die pad, and the first minimum spacing distance is larger than the second minimum spacing distance.
    Type: Application
    Filed: November 3, 2022
    Publication date: February 8, 2024
    Inventors: Cheng-Fu YU, Kai-Jih SHIH, Chi-Yi WU
  • Publication number: 20230173615
    Abstract: A method of forming a package structure includes an etching step, a laser step, a plating step and a singulation step. In the etching step, a plurality of cutting streets of a leadframe are etched. In the laser step, a plastic package material covering on each of the cutting streets is removed via a laser beam. In the plating step, a plurality of plating surfaces are disposed on a plurality of areas of the leadframe without the plastic package material. In the singulation step, the cutting streets of the leadframe are cut to form the package structure.
    Type: Application
    Filed: February 2, 2023
    Publication date: June 8, 2023
    Inventors: Cheng-Fu YU, Kai-Jih SHIH, Yi-Jung LIU
  • Patent number: 11612965
    Abstract: A method of forming a package structure includes an etching step, a laser step, a plating step and a singulation step. In the etching step, a plurality of cutting streets of a leadframe are etched. In the laser step, a plastic package material covering on each of the cutting streets is removed via a laser beam. In the plating step, a plurality of plating surfaces are disposed on a plurality of areas of the leadframe without the plastic package material. In the singulation step, the cutting streets of the leadframe are cut to form the package structure.
    Type: Grant
    Filed: December 2, 2020
    Date of Patent: March 28, 2023
    Assignee: INTEGRATED SILICON SOLUTION INC.
    Inventors: Cheng-Fu Yu, Kai-Jih Shih, Yi-Jung Liu
  • Publication number: 20220246501
    Abstract: A package structure includes a leadframe, a semiconductor die and a plastic package material. The leadframe includes a die pad and a plurality of leads. The leads are disposed on four peripheral regions of the die pad, and each of the leads includes a main body, at least one extending portion and a plurality of plating surfaces. The extending portion is connected to the main body, and the main body and the extending portion are integrally formed. The plating surfaces are disposed on the main body and the extending portion. The semiconductor die is disposed on the die pad of the leadframe. The plastic package material is disposed on the leadframe. The main body and the extending portion of each of the leads protrude a peripheral region of the plastic package material.
    Type: Application
    Filed: April 19, 2022
    Publication date: August 4, 2022
    Inventors: Cheng-Fu YU, Kai-Jih SHIH, Chi-Yi WU
  • Publication number: 20210299791
    Abstract: A method of forming a package structure includes an etching step, a laser step, a plating step and a singulation step. In the etching step, a plurality of cutting streets of a leadframe are etched. In the laser step, a plastic package material covering on each of the cutting streets is removed via a laser beam. In the plating step, a plurality of plating surfaces are disposed on a plurality of areas of the leadframe without the plastic package material. In the singulation step, the cutting streets of the leadframe are cut to form the package structure.
    Type: Application
    Filed: December 2, 2020
    Publication date: September 30, 2021
    Inventors: Cheng-Fu YU, Kai-Jih SHIH, Yi-Jung LIU
  • Publication number: 20210305136
    Abstract: A package structure includes a leadframe, a semiconductor die and a plastic package material. The leadframe includes a die pad and a plurality of leads. The leads are disposed on four sides of the die pad, and each of the leads includes a plurality of plating surfaces. The semiconductor die is disposed on the die pad of the leadframe. The plastic package material is disposed on the leadframe. Each of the leads protrudes an outer region of the plastic package material.
    Type: Application
    Filed: December 2, 2020
    Publication date: September 30, 2021
    Inventors: Cheng-Fu YU, Kai-Jih SHIH, Yi-Jung LIU, Chi-Yi Wu