Costas D Varmazis

Title: The Innovations of Costas D Varmazis

Introduction

Costas D Varmazis is a notable inventor based in Chelmsford, MA (US). He has made significant contributions to the field of semiconductor technology, holding a total of 4 patents. His work primarily focuses on advanced transistor structures and fabrication methods.

Latest Patents

One of his latest patents is titled "Structure of a pHEMT transistor capable of nanosecond switching." This patent discloses a method for fabricating a transistor that includes several steps. Step (A) involves forming a high mobility layer configured to carry a two-dimensional electron gas. Step (B) entails forming a planar layer on the high mobility layer. Step (C) includes forming a barrier layer on the planar layer. Step (D) involves forming a doped layer on the barrier layer, which is generally a low bandgap III-V semiconductor. Finally, Step (E) includes forming a gate in contact with the doped layer, with the gate separated from both a source and a drain by corresponding ungated recess regions. The overall configuration is designed as a pseudomorphic high electron mobility transistor. Another significant patent is the "Selective T-gate process," which describes a method for simultaneously forming multiple metal features on a substrate. This process involves the application of a lower photoresist feature with rounded sides and an upper photoresist feature with undercut sides, positioned in an offset relation to achieve the desired metal features.

Career Highlights

Throughout his career, Costas D Varmazis has worked with prominent companies such as the Whitaker Corporation and Tyco Electronics Corporation. His experience in these organizations has contributed to his expertise in semiconductor technologies and innovations.

Collaborations

Costas has collaborated with notable individuals in his field, including Ying Michael Cheng and Thomas Richard Lepkowski. These collaborations have likely enriched his work and led to further advancements in technology.

Conclusion

Costas D Varmazis is a distinguished inventor whose work in semiconductor technology has led to multiple patents and significant advancements in the field. His innovative approaches to transistor design and fabrication continue to influence the industry.