Company Filing History:
Years Active: 1976
Title: The Innovations of William Joshua Evans
Introduction
William Joshua Evans is a notable inventor based in Berkeley Heights, NJ (US). He has made significant contributions to the field of integrated circuit technology, holding a total of 3 patents. His work has focused on simplifying the fabrication processes of integrated circuits, which has implications for the efficiency and effectiveness of electronic devices.
Latest Patents
One of Evans' latest patents is titled "Integrated injection logic using oxide isolation." This patent describes an integrated injection logic circuit cell structure that simplifies its fabrication. The innovation involves a pattern of oxide isolation regions that define the introduction of two types of impurities, thereby reducing the number of masking steps required. Notably, certain oxide regions do not penetrate through the conventional epitaxial layer, creating a lateral buried path that serves as the base of a lateral injection transistor. Additionally, a pattern of polycrystalline silicon containing impurities is utilized as both a diffusion source and an interconnection.
Another significant patent is "Method for fabricating oxide isolated integrated circuits." This patent outlines a method that simplifies the creation of an oxide isolated integrated circuit structure. It allows for the formation of a first level metallization pattern without the conventional underlying insulating layer. This method eliminates the need to restrict the size of the metallization to the semiconductor regions being contacted. Portions of the first level metallization can extend onto the oxide isolation region to connect two otherwise isolated semiconductor zones. Furthermore, an intermediate dielectric masking pattern is formed after the oxide isolation regions and the first level metallization, defining zones for the introduction of impurities.
Career Highlights
William Joshua Evans has had a distinguished career at Bell Telephone Laboratories, where he has contributed to various advancements in integrated circuit technology. His innovative approaches have led to more efficient manufacturing processes and improved electronic components.
Collaborations
Evans has collaborated with notable colleagues such as Wesley Norman Grant and Bernard T. Murphy. These collaborations have further enriched his work and contributed to the advancements in the field of integrated circuits.
Conclusion
William Joshua Evans is a prominent inventor whose work has significantly impacted the field of integrated circuits. His patents reflect a commitment to innovation and efficiency in technology. His contributions continue to influence the development of electronic devices today.