公开(公告)号：EP2257501A1

公开(公告)日：2010-12-08

申请号：EP09715174.0

申请日：2009-02-26

申请人： Corning Incorporated

发明人： DE ANGELIS, Gilbert ,  HADE, Aaron J ,  KARAJABERLIAN, Suzanne ,  LINEMAN, David M ,  MATTINGLY, William B ,  MORSE, Matthew C ,  MOSHIER, Steven R

IPC分类号： C03B5/167 ,  C03B5/187 ,  C03B5/225 ,  C03B17/06

CPC分类号： C03B17/064 ,  C03B5/16 ,  C03B5/187 ,  C03B5/225 ,  Y02P40/57

摘要： A substantially-isolated/controlled, limited-volume, gas-filled space (e.g., 113b) is formed over at least one free (open) surface of flowing molten glass in a manufacturing line used to produce glass sheets (137), e.g., a manufacturing line employing the fusion process to produce glass sheets suitable for use as substrates for liquid crystal displays. At least a portion of the space comprises a platinum-group metal, e.g., a platinum-rhodium alloy, which can serve as a source of platinum-group condensate defects. The use of the substantially-isolated/controlled, limited-volume, gas filled space substantially reduces the level of such platinum-group condensate defects in the glass sheets, e.g., by more than 50%.