Raws li cov khoom siv hluav taws xob muaj ntau thiab ntau hom, PCB tab tom ntsib kev xav tau ntau ntxiv. Yog li ntawd, cov khoom ntawm ob sab CCL kuj nce ntxiv. Ob-sided CCL yuav tsum tau ua qee yam txheej txheem los ua cov slitting thiab qhov no ua rau UV laser txiav tshuab yog cov cuab yeej zoo tshaj plaws.