Patent ID: 7948600

Claim:
A manufacturing method of a display device in which a first substrate and a second substrate which faces the first substrate in an opposed manner are provided, the first substrate is a plastic substrate, a plurality of lines and a plurality of terminals are formed on a surface of the second substrate which faces the first substrate in an opposed manner, the plurality of terminals is formed on a terminal portion of the second substrate, the first substrate has a cutting line at a position which faces the terminal portion in an opposed manner, and the first substrate is cut along the cutting line so as to expose a portion of the terminal portion, the manufacturing method of a display device comprising the steps of: forming a groove having a predetermined depth in the first substrate by radiating laser beams to a surface of the first substrate on a side opposite to a surface of the first substrate which faces the second substrate in an opposed manner along the cutting line; and cutting the first substrate by applying a load along the groove.