John S Hartman

Title: Innovations by John S. Hartman

Introduction

John S. Hartman is a notable inventor based in Durham, Oregon. He has made significant contributions to the field of optical data storage, holding two patents that showcase his innovative approach to technology. His work has implications for data storage solutions that are both efficient and effective.

Latest Patents

Hartman's latest patents include advancements in bump-forming media and optical data storage mediums. The first patent describes a bump-forming media that incorporates a thin intermediate reflective layer. This optical data storage medium features a triple-layer recording structure consisting of an expansion layer, a retention layer, and a very thin reflective layer interposed between them. These layers are strongly bonded, allowing them to interact thermally and mechanically. The expansion and retention layers are dyed to selectively pass or absorb light of specific wavelengths, while the thin reflective layer is designed to partially pass and reflect light of predetermined wavelengths.

The second patent focuses on an erasable optical data storage medium that includes an embedded servo track. This medium has a subsurface recording interface and features an erasable recording structure with two dyed polymer layers, separated from the servo track by a compression layer. The servo track is formed in a hard substrate, providing mechanical support. This innovative design allows for the formation of non-vesicular data bumps when exposed to a write laser beam, enabling simultaneous reading of the embedded servo track and recording interface in the same focal plane.

Career Highlights

John S. Hartman is associated with Optical Data, Inc., where he continues to develop cutting-edge technologies in optical data storage. His work has positioned him as a key player in the industry, contributing to advancements that enhance data storage capabilities.

Collaborations

Hartman has collaborated with notable colleagues, including Michael A. Lind and W. Eugene Skiens. These partnerships have fostered an environment of innovation and creativity, leading to the development of groundbreaking technologies.

Conclusion

John S. Hartman's contributions to optical data storage through his patents reflect his commitment to innovation in technology. His work continues to influence the field, paving the way for future advancements in data storage solutions.