Company Filing History:
Years Active: 1979-1984
Title: Harold Wieder: Innovator in Optical Technologies
Introduction
Harold Wieder is a notable inventor based in Saratoga, CA (US). He has made significant contributions to the field of optical technologies, holding a total of 2 patents. His work focuses on advancements in optical recording mediums and photoconductors, showcasing his expertise in materials science and engineering.
Latest Patents
One of Harold's latest patents is for an optical recording medium. This invention comprises adjacent thin layers of two different materials. Upon marking with an energy beam, these layers form a marked area that consists of an alloy or mixture of the two materials. The optical properties of the marked area differ sufficiently from those of the unmarked area, allowing for reliable sensing. The first of the thin layers includes a metal, while the second layer can be either a metal or a semiconductor. The metals used in this invention include Al, Au, Pb, and Sn, while the semiconductors are chosen from Ge and Si.
Another significant patent by Harold is for a photoconductor designed for GaAs laser addressed devices. This improved photoconductor is sensitive to illumination at approximately 1.5 eV and is made from an amorphous material that contains silicon, hydrogen, and a material selected from Ge, Sn, and Pb. A preferred embodiment of this invention is amorphous Si.sub.x Ge.sub.1-x H.sub.y, where x ranges from 0.78 to 0.93 and y comprises 14-20 atomic percent.
Career Highlights
Harold is currently employed at International Business Machines Corporation (IBM), where he continues to innovate and develop new technologies. His work at IBM has allowed him to contribute to various projects that push the boundaries of optical technology.
Collaborations
Throughout his career, Harold has collaborated with notable colleagues, including Aare Onton and Jacques P Chevallier. These collaborations have enriched his work and led to advancements in the field.
Conclusion
Harold Wieder's contributions to optical technologies through his patents and work at IBM highlight his role as a significant innovator in the industry. His inventions continue to influence advancements in optical recording and photoconductive materials.