Epson PrecisionCore is a revolution in the printing world, developed in 2007 at Epson's LAB , 
 The 2007 launch of Epson Thin Film Piezo (TFP) laid the foundation for PrecisionCore technology. The development of piezo crystal films just one micron thick—one hundredth the thickness of a human hair—allowed the maximum output of ink from the smallest print engine, allowing a big increase in the density of print nozzles. Combined with precise ink channels and nozzles, TFP printheads are able to place almost perfectly round dots on media with great Precision
Today, PrecisionCore is Epson’s most advanced printhead technology. it's a collect between  Micro Electro Mechanical Systems (MEMS) and  Thin Film Piezo (TFP)
all those to get the high speed, the precision and the high printing resolution and quality  ,