Glass plate and method for manufacturing the glass plate

1. A glass plate comprising:

two main flat surfaces;

a side surface adjacent to the two main flat surfaces, and

a chemically strengthened layer in at least one of the two main flat surfaces,

wherein at least one edge part of the side surface includes a chamfered part in a thickness direction of the glass plate,

wherein the side surface includes a predetermined portion,

wherein the glass plate has a property such that an etched surface of the predetermined portion includes no pit having a depth greater than or equal to 1 μm when the predetermined portion is etched with a depth of 10 μm and a depth of a pit in the etched surface of the predetermined portion is measured, the pit has no microscratch that is a source of breaking,

wherein the predetermined portion is a portion of the side surface in which a distance from one of the two main flat surfaces adjacent to the chamfered part in the thickness direction of the glass plate is less than or equal to ⅕ of the thickness of the glass plate, and

wherein a flexural strength of the glass plate is greater than or equal to 300 MPa.

2. The glass plate as claimed in claim 1 , wherein the side surface includes an area in which tensile stress caused by chemically strengthening remains.

3. The glass plate as claimed in claim 2 , wherein the predetermined portion of the side surface partly superposes the area in which tensile stress caused by chemically strengthening remains.

4. The glass plate of claim 1 , wherein the chamfered part is a flat surface and is diagonal with at least one main flat surface, or each edge part includes a chamfered part each of which is an outwardly curved surface and the chamfered parts are connected to each other omitting a flat part of the side surface.

5. The glass plate of claim 1 , wherein two edge parts of the side surface include a chamfered part in a thickness direction of the glass plate.