Company Filing History:
8 out of 38,119 
1 out of 156 Years Active: 1995-2002
Title: The Innovations of David F Cheffings
Introduction
David F Cheffings is a notable inventor based in Boise, ID (US), recognized for his contributions to semiconductor technology. He holds a total of 9 patents, showcasing his innovative spirit and technical expertise in the field.
Latest Patents
One of his latest patents is titled "Method of controlling outdiffusion in a doped three-dimensional film." This invention presents a solid-state fabrication technique aimed at controlling the amount of outdiffusion from a three-dimensional film. The method involves providing a first layer of insitu doped film, which is then covered by a second layer of undoped film. The layers are etched according to a predetermined pattern, and the second layer is doped to achieve a desired dopant density that decreases from the upper portion to the lower portion. This innovative approach effectively eliminates or significantly reduces the outdiffusion of the dopant into the substrate, addressing common issues associated with this phenomenon.
Another significant patent by Cheffings is "Apparatus having low resistance angled implant regions." This invention describes a semiconductor memory structure that features an electrically conductive substrate interconnect. This interconnect is designed to ensure electrical continuity between a buried contact region and a source/drain region of a transistor, without any overlap. The substrate interconnect is formed during an ion bombardment process, where ions enter the substrate at an oblique angle, enhancing the efficiency of the device.
Career Highlights
Throughout his career, David F Cheffings has worked with prominent companies in the semiconductor industry, including Micron Technology Incorporated and Micron Semiconductor, Inc. His experience in these organizations has contributed significantly to his development as an inventor and innovator.
Collaborations
Cheffings has collaborated with notable professionals in the field, including D Mark Durcan and Luan C Tran. These collaborations have likely enriched his work and expanded the impact of his inventions.
Conclusion
David F Cheffings is a distinguished inventor whose work in semiconductor technology has led to significant advancements. His innovative patents reflect his commitment to solving complex challenges in the industry.