Company Filing History:
1 out of 10 
1 out of 219 
Years Active: 1989-1991
Title: The Innovative Contributions of Marvin R. Johnson
Introduction
Marvin R. Johnson is a notable inventor based in Mira Loma, California. He has made significant contributions to the field of microelectronics through his innovative patents. With a total of two patents to his name, Johnson has developed advanced methods for manufacturing probe test structures for microcircuits.
Latest Patents
Johnson's latest patents focus on "Electroformed Chemically Milled Probes for Chip Testing." This method utilizes a multiple coating technique in conjunction with a novel double-cell electroplating apparatus. The process involves applying photoresist to both sides of a copper foil, electroforming copper posts onto selected areas, and laminating polyimide prepreg to the post side. The copper posts are then exposed, and additional copper is electroformed through image hole patterns. The foil is chemically milled to provide leads integral with each post, and the remaining photoresist is removed to create the desired test probe set. In a second embodiment, nickel plating is added over the copper to achieve selective etching, allowing for simultaneous processing of both sides of the copper foil.
Career Highlights
Throughout his career, Marvin R. Johnson has worked with prominent companies such as General Dynamics Corporation and its Air Defense Systems Division, as well as the Pomona Division of General Dynamics Corp. His experience in these organizations has contributed to his expertise in the field of microelectronics and patent development.
Collaborations
Johnson has collaborated with various professionals in his field, including his coworker William P. Dugan. Their joint efforts have likely led to advancements in the technologies they have worked on together.
Conclusion
Marvin R. Johnson's innovative work in the development of probe test structures for microcircuits showcases his significant contributions to the field of microelectronics. His patents reflect a deep understanding of manufacturing processes and a commitment to advancing technology.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.