Daniel D Leffel

Title: The Innovations of Daniel D. Leffel

Introduction

Daniel D. Leffel is an accomplished inventor based in Earl Township, Berks County, PA. He holds a total of 3 patents that showcase his expertise in the field of semiconductor technology. His innovative methods have contributed significantly to the development of dielectrically isolated (DI) structures.

Latest Patents

One of his latest patents is titled "Method of forming complementary device structures in partially processed." This method involves altering the resistivity of selected regions in a dielectrically isolated wafer. After forming the conventional tub structure, the wafer is patterned and etched to expose selected tubs. These tubs are then etched and selectively implanted, allowing for the growth of an epitaxial layer with a new resistivity value. This innovation enables the alteration of conductivity in specific tub regions.

Another significant patent is "Technique for fabricating complementary dielectrically isolated wafer." This method provides tub regions with various resistivities within a dielectrically isolated structure. The starting substrate material is etched to expose locations for resistivity modification, and epitaxial material of the modified resistivity value fills the exposed tubs. This technique allows for the creation of a DI structure containing both n-type and p-type tube regions, with the potential for further customization.

Career Highlights

Daniel D. Leffel has worked with notable companies such as AT&T Technologies, Inc. and American Telephone and Telegraph Company. His experience in these organizations has allowed him to refine his skills and contribute to advancements in telecommunications and semiconductor technologies.

Collaborations

Throughout his career, Leffel has collaborated with esteemed colleagues, including William Graham Easter and Richard K. Beltz. These partnerships have fostered innovation and the exchange of ideas in the field.

Conclusion

Daniel D. Leffel's contributions to the field of semiconductor technology through his patents and collaborations highlight his role as a significant inventor. His innovative methods continue to influence the development of advanced electronic devices.