(e) 10 m thick photoresist re-coating and photolithography by using mask of supporting pillars.
(f) Electroplate supporting pillars using 15 m thick Ni, the composition and the electroplating conditions are the same as step
(d).
(g) Chromium/copper (10 nm/90 nm) was sputtered and 30 m thick photoresist re-coating, then photolithography by using mask of floating plate.