Company Filing History:
Years Active: 1999-2003
Title: Thomas Tong-Long Chang: Innovator in Nonvolatile Memory Technologies
Introduction
Thomas Tong-Long Chang is a prominent inventor based in Santa Clara, CA (US). He has made significant contributions to the field of nonvolatile memory technologies, holding a total of 4 patents. His work focuses on innovative memory structures and fabrication methods that enhance the performance and reliability of memory devices.
Latest Patents
One of Thomas Chang's latest patents involves the development of nonvolatile memory structures and fabrication methods. In this invention, select gates are designed as self-aligned spacers formed on the sidewalls of floating and control gate stacks. The same mask is utilized to remove the select gate layer from over the source lines, etch trench insulation in the source line regions, and dope the source lines. This memory can be constructed in and over an isolated substrate region. The source lines can be doped at least partially before the trench insulation is etched, which helps prevent shorts between the source lines and the region isolating the substrate from below. The memory can be erased sector by sector, or alternatively, a chip erase operation can be performed to erase all cells in parallel. Additionally, peripheral transistor gates can be formed from the same layer as the select gates, and the select gate spacers have extensions that allow for low resistance contacts from overlying metal lines.
Career Highlights
Thomas Chang is currently employed at Mosel Vitelic Corporation, where he continues to innovate in the field of memory technologies. His work has been instrumental in advancing the capabilities of nonvolatile memory systems.
Collaborations
Some of his notable coworkers include Hsing Ti Tuan and Li-Chun Li, who have collaborated with him on various projects within the company.
Conclusion
Thomas Tong-Long Chang is a key figure in the development of nonvolatile memory technologies, with a strong portfolio of patents that reflect his innovative spirit. His contributions continue to shape the future of memory devices, making significant impacts in the industry.
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