Patent ID: 8062461

Claim:
An electro-optical device manufacturing method for attaching a first substrate to a second substrate and dividing the attached substrates into a plurality of sections for manufacturing a plurality of electro-optical panels, the method comprising: attaching a first substrate to a second substrate using a seal material or an adhesive; following attachment of the first substrate to the second substrate, forming a first set of scribe lines in at least a portion of division positions of the second substrate; following formation of the first set of scribe lines in the second substrate, applying an external force to the second substrate to form a first set of cracks which pass through the second substrate in a thickness direction of the second substrate along the first set of scribe lines; following formation of the first set of cracks in the second substrate, forming dicing lines in the second substrate, the dicing lines being formed along the first set of scribe lines and the first set of cracks at a predetermined depth from a surface of the second substrate, the dicing lines forming dicing process faces that are substantially parallel to each of the first set of cracks and forming bevels extending obliquely between the dicing process faces and each of the first set of cracks; following formation of the dicing lines in the second substrate, forming a second set of scribe lines in at least a portion of division positions of the first substrate; following formation of the second set of scribe lines in the first substrate, applying an external force to the first substrate to form a second set of cracks which pass through the first substrate in a thickness direction of the first substrate along the second set of scribe lines; dividing the first and second substrates into electro-optical panels; and package in each electro-optical panel into a packaging case having a containing chamber, wherein each containing chamber has a wall portion and a beveled portion extending obliquely from the wall portion, the wall portion contacting at least one of the dicing process faces of the electro-optical panel and the beveled portion and the beveled portion being disposed adjacent to at least one of the bevels of the electro-optical panel.