Company Filing History:
Years Active: 1992-1998
Title: Exploring the Innovations of David A. Johnson
Introduction
David A. Johnson, an accomplished inventor based in Camarillo, California, has made significant contributions to the field of semiconductor technology. With a total of four patents to his name, his work primarily focuses on developing efficient ohmic contacts for III-V semiconductor devices, which are critical in various electronic applications.
Latest Patents
Among Johnson's latest patents is a groundbreaking process for forming ohmic contacts in n-type Gallium Arsenide (GaAs). This innovative method results in a dependable ohmic contact with a consistently low specific contact resistance of less than 1 x 10^-6 Ω-cm². The process involves several steps, including treating the GaAs surface with sulfur or sulfur-containing compounds before depositing a metal contact layer. Notably, this approach eliminates gold, enhancing reliability by avoiding issues such as the intermetallic compounds that can occur and ultimately improving the performance of the contacts.
Another standout patent by Johnson is the gate-to-ohmic metal contact scheme designed for III-V devices. This invention introduces a direct shorting contact structure that simplifies the connection between the gate electrode and the source or drain region, minimizing the required area and eliminating the need for additional metallization layers. The metal layer configuration uses a sturdy composite of materials, ensuring excellent step coverage and reliability, which are vital for the performance of modern semiconductor devices.
Career Highlights
Currently, David A. Johnson is employed at Vitesse Semiconductor Corporation, a company known for its innovation in the semiconductor industry. His expertise in semiconductor technology and material science has driven advancements in device reliability and efficiency. Throughout his career, Johnson has focused on refining processes that improve the functionality and durability of semiconductor devices, making him a key player in the field.
Collaborations
Johnson collaborates closely with C. David Forgerson II, a colleague who shares his passion for semiconductor innovations. Their partnership and shared expertise contribute to the ongoing development of cutting-edge technologies that enhance electronic device performance.
Conclusion
David A. Johnson's contributions to semiconductor technology through his patents and collaborative efforts position him as a significant figure in the industry. His innovative approaches to forming ohmic contacts and improving device reliability demonstrate his commitment to advancing technology and addressing the ever-evolving challenges within the semiconductor landscape. As he continues his work at Vitesse Semiconductor Corporation, the impact of his inventions will undoubtedly pave the way for future advancements in the field.