Company Filing History:
Years Active: 1976
Title: Joseph Raymond Ligenza: Innovator in Semiconductor Technology
Introduction
Joseph Raymond Ligenza is a notable inventor based in Califon, New Jersey. He has made significant contributions to the field of semiconductor technology, holding two patents that showcase his innovative approach to memory structures and charge conditions in silicon dioxide layers.
Latest Patents
Ligenza's latest patents include a method for fabricating multilayer insulator-semiconductor memory. This invention involves a semiconductor-insulator-metal memory structure that incorporates an impurity, such as tungsten, concentrated in the interface region between two insulator layers. The fabrication process utilizes reactive evaporation to deposit tungsten trioxide on the exposed insulator layer before creating the second layer. Another patent addresses charge effects in doped silicon dioxide, where a distribution of tantalum is introduced to modify charge conditions. This distribution can store negative charge, getter sodium, or produce nonannealable fast surface states, enhancing the performance of n-channel insulated gate field effect transistors.
Career Highlights
Ligenza has had a distinguished career at Bell Telephone Laboratories, where he has been instrumental in advancing semiconductor technologies. His work has contributed to the development of more efficient memory structures and improved charge management in silicon-based devices.
Collaborations
Throughout his career, Ligenza has collaborated with esteemed colleagues such as Dawon Kahng and Ernest Edward La Bate. These collaborations have further enriched his contributions to the field of semiconductor technology.
Conclusion
Joseph Raymond Ligenza's innovative work in semiconductor technology has led to significant advancements in memory structures and charge management. His patents reflect a deep understanding of materials and their applications in modern electronics.