Thermal bubble micro-injectors are being widely used in inkjet printing applications. The reason for the thermal bubble micro-injector to remain dominant in consumer applications is because of its high performance, low cost, and good reliability [1]. The fabrication of a micro-electromechanical-system (MEMS) based thermal micro-injector requires very precise assembly of various components to form the micro-fluidic structure. The micro-injector printing head reported in this paper employs twin bubbles as a virtual chamber neck to eject fluid [2]. An additional thick nozzle plate is electroplated to provide robust support for stable droplet ejection [3]. Further, this thick nozzle plate enhances heat dissipation of this micro-injector to achieve higher printing speed.
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