Fine Droplets Technology of Piezoelectric Inkjet Print-Head

Abstract

In recent years, the innovative progress in inkjet head technology has made the largest contribution in improving print quality in producing photo-quality prints by introducing extremely fine droplets. This rapid and drastic progress, that has reduced the minimum droplet size by a factor of ten in the last five years, has made the inkjet a widespread device and has been introducing this technology into new market fields and application areas.
This paper focuses on Epson’s Micro Piezo Head Technology and describes the structure of Epson’s piezo print heads: MACH, the dynamics analysis and ink meniscus control basics for understanding the fine droplet technology of piezo heads, and then the head structure and driving signal designing for fine droplets generation.