Patent ID: 9561982
Date: 2017-02-07
CPC Classifications: B08B,C03C,H01L

Claim:
1. An in-line method of removing contaminants from a surface of a glass substrate comprising the steps of: conveying the glass substrate with a conveying device along a conveyance direction, wherein during the conveying at least one surface of the glass substrate is subjected to a surface treatment comprising, sequentially: a) exposing the at least one surface of the glass substrate to a liquid discharge comprising ozonated water; b) exposing the at least one surface of the glass substrate to a liquid discharge of a first base solution, wherein ultrasonic energy is applied to the first base solution at a frequency in a range from about 20 kHz to about 200 kHz; c) exposing the at least one surface of the glass substrate to a liquid discharge of a second base solution; d) exposing the at least one surface of the glass substrate to a liquid discharge of a first acid solution to remove metallic ions from the at least one surface of the glass substrate, wherein the first acid solution comprises HCl; and e) drying the at least one surface of the glass substrate.