Patents by Inventor Wangkeun CHO

Wangkeun CHO 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: 20230083577
    Abstract: Embodiments described herein generally relate to electronic devices and electronic device manufacturing. More particularly, some embodiments of the present disclosure provide methods of manufacturing memory devices, for example, dynamic random-access memory cells with buried word-lines. In an embodiment, a method of manufacturing an electronic device is provided. The method includes recessing a metal layer to a first predetermined depth to form a recessed metal layer. The metal layer at least partially fills each feature of a plurality of features formed on a substrate and each feature has a feature depth. The method further includes exposing the recessed metal layer to a carbon-containing plasma to form a metal-carbide layer on the recessed metal layer. The method further includes recessing the recessed metal layer to a second predetermined depth by etching the metal-carbide layer and the recessed metal layer.
    Type: Application
    Filed: August 19, 2022
    Publication date: March 16, 2023
    Inventors: Wangkeun CHO, Gene LEE
  • Patent number: 10103070
    Abstract: Methods and processes for forming semiconductor devices with reduced yield loss and failed dies are provided. One method includes, for instance: obtaining a wafer after at least one fabrication processing; taking first r, ?, z measurements of the wafer after the at least one fabrication processing; performing at least one second fabrication processing; taking second r, ?, z measurements of the wafer after the at least one second fabrication processing; and analyzing the second r, ?, z measurements with respect to the first r, ?, z measurements. A process includes, for instance: obtaining a wafer with a substrate and at least one first device positioned on the substrate; taking first measurements in a r, ?, z coordinate system; forming at least one second device over the substrate; taking second measurements in the r, ?, z coordinate system; and analyzing the second measurements with respect to the first measurements.
    Type: Grant
    Filed: March 27, 2015
    Date of Patent: October 16, 2018
    Assignee: GLOBALFOUNDRIES Inc.
    Inventors: Dongsuk Park, Wangkeun Cho, Wen Hua Cheng
  • Publication number: 20160284609
    Abstract: Methods and processes for forming semiconductor devices with reduced yield loss and failed dies are provided. One method includes, for instance: obtaining a wafer after at least one fabrication processing; taking first r, ?, z measurements of the wafer after the at least one fabrication processing; performing at least one second fabrication processing; taking second r, ?, z measurements of the wafer after the at least one second fabrication processing; and analyzing the second r, ?, z measurements with respect to the first r, ?, z measurements. A process includes, for instance: obtaining a wafer with a substrate and at least one first device positioned on the substrate; taking first measurements in a r, ?, z coordinate system; forming at least one second device over the substrate; taking second measurements in the r, ?, z coordinate system; and analyzing the second measurements with respect to the first measurements.
    Type: Application
    Filed: March 27, 2015
    Publication date: September 29, 2016
    Applicant: GLOBALFOUNDRIES Inc.
    Inventors: Dongsuk PARK, Wangkeun CHO, Wen Hua CHENG