Improvement of Cr-mask Cleaning

Cr-mask of CSTN-LCD was cleaned by mask-cleaning machine.The cause of scraping of Cr-layer broke off from Cr-mask in cleaning was analyzed.It depends heavily on axial spray press and horizontal circumferential force.With adjusting rev and spray press,it was found out that the secure conditions of manipulating mask-cleaning machine were the rev not more than 1 000 r/min and the spray press less than 0.5×105 Pa.It is necessary to fulfil requirement of clean by the means of pre-cleaning.The average conversion time was shorten from 3 h to 1 h.The throughput was increased by 270 000 sheets.