METHOD FOR PRODUCING GLASS PLATE AND DEVICE FOR PRODUCING SAME

摘要

An upper surface 14 of a lower structure 11 having a gas supply opening 26 and a gas discharge opening 30 is arranged in opposition to a lower surface 13 of an upper structure 10, and a lower surface 3a of a glass plate 3 transported in the horizontal direction is subjected to an etching treatment in a treatment space 15 formed between said opposing surfaces 13, 14 with a treatment gas 5 that is blown out from the gas supply opening 16 and sucked into the gas discharge opening 30. The gas supply opening 26 and the gas discharge opening 30 are located so as to be separated in the transporting direction of the glass plate 3. The upper surface 14 of the lower structure 11 is configured such that an upper surface section 22a at the highest position in a region from the gas discharge opening 30 to the gas supply opening 26 is higher than an upper surface section 18ab at the highest position in a region on the downstream side of the gas discharge opening 30 in the treatment gas flow direction.