Location History:
- Bensalem, PA (US) (1983)
- Cornwells Heights, PA (US) (1983 - 1985)
Company Filing History:
Years Active: 1983-1985
Title: Innovations of John E. Sheppard
Introduction
John E. Sheppard is a notable inventor based in Cornwells Heights, PA (US). He has made significant contributions to the field of semiconductor devices and Josephson junctions. With a total of 3 patents, his work has advanced the technology used in these areas.
Latest Patents
One of his latest patents is a method of forming a low temperature multilayer photoresist lift-off. This innovative technique involves creating a multilayer lift-off pattern using both positive and negative photoresist materials. The process includes depositing a positive first layer on a substrate, flood exposing it, and then adding a layer of negative photoresist material. An optional third layer of positive photoresist can also be added. This method is particularly useful in the manufacture of Josephson junction devices and semiconductor devices.
Another significant patent by Sheppard is a method of making planarized Josephson junction devices. This invention teaches a technique for planarizing built-up vacuum deposited surfaces on Josephson junction and semiconductor devices. The method ensures that successively deposited layers do not replicate the undulations of previous layers, resulting in a substantially planar surface.
Career Highlights
John E. Sheppard has had a distinguished career, working at Sperry Corporation. His expertise in semiconductor technology has made him a valuable asset to the company. His innovative approaches have led to advancements in the manufacturing processes of critical electronic components.
Collaborations
Throughout his career, Sheppard has collaborated with notable colleagues, including Peter L. Young and Barry F. Stein. These collaborations have further enriched his work and contributed to the development of groundbreaking technologies.
Conclusion
John E. Sheppard's contributions to the field of semiconductor devices and Josephson junctions are noteworthy. His innovative patents and career at Sperry Corporation highlight his impact on technology. His work continues to influence advancements in the industry.