CRT has been already a dominant display for half acentury. However , CRTis suffering severe challengefromflat panel displays (FPDs) . Since the shadowmask CRT has an unequivocal price-performance ratiocompared with other displays , nowadays the CRT isstill an i mportant display[1].The basic concept of theshadow mask CRThas not been changedin the last 50years . Many performances and process i mprovementshave been made[2 ,3]. Newtechnologies to i mprove thecost performance still should b…