Company Filing History:
4 out of 8 
3 out of 600 Years Active: 2011-2014
Title: The Innovative Contributions of Joel Kearns
Introduction
Joel Kearns is a notable inventor based in Springfield, VA (US), recognized for his significant contributions to the field of semiconductor crystal growth. With a total of 4 patents to his name, Kearns has developed innovative methods that enhance the efficiency and quality of semiconductor manufacturing processes.
Latest Patents
Kearns' latest patents include a procedure for in-situ determination of thermal gradients at the crystal growth front. This invention involves a method and apparatus for growing a semiconductor crystal by pulling the crystal from melt at a modulated pull speed. The modulation allows for the in-situ determination of temperature gradients, which can be used to control process parameters affecting the stability and properties of the finished crystal. Another significant patent is a method and apparatus for controlling the diameter of a silicon crystal ingot during the growth process. This improvement enhances the conventional control model by transforming a quadratic relationship between diameter and pull-speed into a linear relationship, allowing for more precise control over the growth of monocrystalline silicon ingots.
Career Highlights
Throughout his career, Kearns has worked with prominent companies in the semiconductor industry, including Sumco Phoenix Corporation and Sumco Corporation. His experience in these organizations has contributed to his expertise in crystal growth technologies and semiconductor manufacturing.
Collaborations
Kearns has collaborated with notable professionals in his field, including Benno Orschel and Keiichi Takanashi. These collaborations have further enriched his work and contributed to advancements in semiconductor technology.
Conclusion
Joel Kearns is a distinguished inventor whose work in semiconductor crystal growth has led to innovative patents that improve manufacturing processes. His contributions continue to influence the semiconductor industry and enhance the quality of materials produced.