Company Filing History:
6 out of 6,228 
1 out of 49,888 
1 out of 2,340 
Years Active: 1996-2010
Title: Chang Yeol Lee: Innovator in Semiconductor Technology
Introduction
Chang Yeol Lee is a prominent inventor based in Seoul, South Korea. He has made significant contributions to the field of semiconductor technology, holding a total of 8 patents. His innovative work focuses on improving fabrication processes and enhancing the performance of semiconductor devices.
Latest Patents
One of his latest patents is a method for reducing poly-depletion in dual gate CMOS fabrication processes. This method enhances doping efficiency in gate polysilicon films by employing four technical principles. The first principle states that increasing the dose of N+ ion implantation boosts doping efficiency. The second principle indicates that reducing the thickness of N+ polysilicon also enhances efficiency. The third principle involves adjusting the EFH to be less than 0 to inhibit depletion caused by channel width reduction. Lastly, dividing polysilicon deposition and ion implantation into multiple steps further increases overall doping efficiency.
Another notable patent is related to a SRAM cell and its manufacturing method. This SRAM cell includes a pair of access devices, pull-up devices, and pull-down devices, along with at least one metal plate formed on metal interconnection lines. The inclusion of a dielectric film between the metal plate and the interconnection lines increases cell capacitance, thereby reducing the soft error rate. The design allows for one or two metal plates in each cell, which helps prevent variations in electric potentials caused by generated electrons.
Career Highlights
Chang Yeol Lee has worked with leading companies in the semiconductor industry, including Hynix Semiconductor Inc. and LG Electronics Inc. His experience in these organizations has allowed him to develop and refine his innovative ideas, contributing to advancements in semiconductor technology.
Collaborations
Throughout his career, Chang Yeol Lee has collaborated with notable professionals in the field, including Myeong Kook Gong and Do Woo Kim. These collaborations have further enriched his work and led to the development of groundbreaking technologies.
Conclusion
Chang Yeol Lee is a distinguished inventor whose contributions to semiconductor technology have made a lasting impact. His innovative patents and collaborations with industry leaders highlight his commitment to advancing the field. His work continues to influence the development of more efficient and reliable semiconductor devices.