This inventor holds 3 USPTO granted patents. Top assignee: International Business Machines Corporation. Active years: 1984-1986.
Company Filing History:
Years Active: 1984-1986
Title: Ralph R. Trotter: Innovator in Electron Beam Technology
Introduction
Ralph R. Trotter is a notable inventor based in Hopewell Junction, NY (US). He has made significant contributions to the field of electron beam technology, holding a total of 3 patents. His work has been instrumental in advancing methods for controlling electron beam alignment and brightness.
Latest Patents
One of Ralph R. Trotter's latest patents is a method and apparatus for controlling the alignment and brightness of an electron beam. This innovative technique involves aligning the beam with the center of an aperture by cyclically scanning the beam across the aperture. The process includes measuring the beam current that flows through the aperture and determining the difference in beam currents during adjacent half cycles of the scan. The alignment is achieved when the difference in currents is zero, indicating that the beam is perfectly aligned. Additionally, the total current flowing through the aperture is sensed to regulate the brightness of the electron beam.
Another significant patent focuses on an alignment system for the registration of a scanning beam in a mask inspection tool. This technique enhances registration sensitivity by allowing the initial placement of the electron beam to be outside the capture range. The correction signals obtained from comparing backscattered electron signals from two scans indicate the amount and direction of correction required.
Career Highlights
Ralph R. Trotter has had a distinguished career at the International Business Machines Corporation (IBM). His work has contributed to the development of advanced technologies in the field of electron beam applications. His innovative approaches have paved the way for improvements in precision and efficiency in various electronic systems.
Collaborations
Throughout his career, Ralph has collaborated with notable colleagues, including Donald F. Haire and Donald E. Davis. These collaborations have further enriched his work and contributed to the advancements in the technologies he has developed.
Conclusion
Ralph R. Trotter's contributions to electron beam technology through his patents and work at IBM highlight his role as a significant innovator in the field. His methods for controlling electron beam alignment and brightness have had a lasting impact on the industry.