A layer of nano-ceramic material such as Zirconium or Zirconia is coated over tip portion of a syringe needle is disclosed. The syringe needle with a smooth tip keeps the puncture wound intact, the puncture wound shall recover sooner for a regular one than irregular one.以金屬鋯或是氧化鋯之奈米陶瓷光滑披覆層,披覆於不銹鋼注射針頭的「尖端」區域,製成一種具有光滑外表的注射針頭,穿刺皮膚或血管時,保持傷口平整,可以加速傷口復原。120‧‧‧針體121‧‧‧光滑披覆層123‧‧‧切口125‧‧‧通孔W1‧‧‧切口寬度W2‧‧‧披覆層寬度