James H Coleman

Title: Innovations of James H. Coleman in Ceramic Capacitor Technology

Introduction

James H. Coleman is a notable inventor based in Wichita Falls, TX (US), recognized for his contributions to the field of ceramic capacitor technology. With a total of six patents to his name, Coleman has made significant advancements that enhance the performance and manufacturing processes of monolithic ceramic capacitors.

Latest Patents

Coleman's latest patents include innovative methods for manufacturing monolithic ceramic capacitors. One of his patents describes a process where a substrate is repeatedly passed through a falling sheet of a green-ceramic slurry. This method involves heating the substrate to dry each slurry coating before applying the next layer. The process also includes screen printing a matrix of electroding-ink-film pairs and patches on the dried coatings. The registration of these patches is crucial, as it allows for a relatively large change in registration to produce a small change in overall capacitance. The final steps of this method involve dicing the green-ceramic cake into rectangular bodies, firing them to maturity, and applying conductive terminals for electrical contact.

Another significant patent focuses on an adjustable monolithic ceramic capacitor design. This design features at least two main buried electrodes that extend to opposite ends of the ceramic body, along with two auxiliary electrodes of smaller dimensions. The innovative aspect of this design is the ability to apply conductive terminations to the surfaces of the body, allowing for precise control over the capacitance measured between the body ends.

Career Highlights

James H. Coleman has spent a considerable part of his career at Sprague Electric Company, where he has been instrumental in developing advanced capacitor technologies. His work has not only contributed to the company's reputation but has also pushed the boundaries of what is possible in ceramic capacitor design and manufacturing.

Collaborations

Coleman has collaborated with various professionals in the field, including his coworker Reginald L. Hofmaier. Their combined expertise has led to innovative solutions and improvements in capacitor technology.

Conclusion

James H. Coleman's contributions to the field of ceramic capacitors have been significant, with his innovative patents paving the way for advancements in this technology. His work continues to influence the industry and enhance the performance of electronic components.