Glass substrate for TFT

• Main Authors: ONO YOSHITAKA, IKAWA NOBUAKI, KUNIGITA MASAYA, IGA MOTOICHI
• Format: Patent
• Language: Chinese; English
• Published: 07.04.2023
• Subjects: CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS; CHEMISTRY; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; FREQUENCY-CHANGING; GLASS; JOINING GLASS TO GLASS OR OTHER MATERIALS; MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES; METALLURGY; MINERAL OR SLAG WOOL; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

The invention provides a glass substrate for a TFT, which can form an element or a structural body with higher precision and/or quickness. The glass substrate (1) for a TFT is composed of a rectangular glass plate (10) provided with a first main surface (11) and a second main surface (12) opposite to the first main surface (11), the glass plate (10) is a large glass plate (10), and the thickness of the glass plate (10) is larger than the thickness of the glass plate (10) in the view field observed from the plate thickness direction of the glass plate (10). The large glass plate (10) is provided with a first main surface (11), a second main surface (12) opposite to the first main surface (11), a first side (13) connecting the first main surface (11) and the second main surface (12), and a second side (14) adjacent to the first side (13), and the length of the first side (13) and the second side (14) is at least 1200 mm. The plate thickness tolerance, which is the difference between the maximum value Wmax of th