Howard H Nakano

Title: Howard H. Nakano and His Circuit-Etching Innovation.

Introduction

Howard H. Nakano was an inventor associated with Hewlett-Packard Company in Corvallis, Oregon. His patent work addressed a manufacturing challenge in producing fine-geometry gold circuit structures: keeping the etching process consistent as dissolved gold accumulates in the etchant.

Latest Patents

Nakano’s listed patent, “Controlled Etching Process for Forming Fine-Geometry Circuit Lines,” describes methods for maintaining a constant gold etching rate. One method cools the etchant to precipitate a gold complex, then heats the recovered etchant for reuse. Another uses an immersed cathode-and-anode assembly to recover metallic gold and regenerate the etchant.

By applying these methods continuously or periodically in dip or spray etching systems, manufacturers can produce circuit structures more accurately while reducing etchant consumption, waste, and disposal costs. Nakano is credited with 1 patent in the information provided.

Career Highlights

Nakano’s documented contribution focuses on improving the control and efficiency of circuit-board manufacturing. His approach links consistent etching performance with material recovery and reduced waste.

Collaborations

The provided information identifies John P. Scalia and Daniel J. Miller as Nakano’s coworkers. It does not specify their roles in developing or patenting the etching process.

Conclusion

Howard H. Nakano’s patent describes practical methods for sustaining etchant performance and recovering gold, supporting more precise and resource-efficient production of fine-geometry circuit structures.