Steven M Johnson is an accomplished inventor based in Arnold, MD (US). He holds two patents that showcase his expertise in the field of photoimageable permanent resist compositions. His work has significantly contributed to advancements in printed circuit technology.

Latest Patents

Johnson's latest patents involve compositions that include an acidified epoxy oligomer, a free radical photoinitiator, and a monomer capable of being polymerized by the photoinitiator. These compositions are utilized to create aqueous developable, photodefined coatings that serve as permanent solder marks for printed circuits and permanent plating resists for additive printed wiring boards. The process for using these compositions includes application as a fluid in solvents, drying, exposure to ultraviolet light, development in an aqueous alkaline solution, and crosslinking the acidified epoxy oligomers. The resulting articles produced include printed wiring boards featuring the permanent, photoimaged resist composition.

Career Highlights

Throughout his career, Johnson has worked with notable companies such as Amp-Akzo Corporation and Haven Corporation. His experience in these organizations has allowed him to refine his skills and contribute to innovative projects in the field of electronics.

Collaborations

Johnson has collaborated with various professionals, including his coworker Edward J Leech. Their combined efforts have led to advancements in the technologies they have developed.

Conclusion

Steven M Johnson's contributions to the field of photoimageable permanent resist compositions highlight his innovative spirit and dedication to advancing technology in printed circuits. His patents and career achievements reflect his significant impact on the industry.

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