Discrete piece forming device and discrete piece forming method

A discrete piece forming device comprising:

• a dividing unit which divides a work by forming a crack in the work, to form a discrete piece, the work having (i) a pre-pasted adhesive sheet containing a swell grain which swells by application of a predetermined energy, (ii) a modified part, which is a part of the work where a property of the work is modified but the work is not cut apart, and (iii) a predefined discrete piece area surrounded by the modified part or surrounded by the modified part and an outer edge of the work in a state in which the work remains as a substantially single body without being divided until the crack is formed in the work, and the dividing unit forming the crack in the work with the modified part serving as a starting point by applying external force to the work,
• wherein the dividing unit applies the energy to a part of the adhesive sheet to swell the swell grain contained in the part of the adhesive sheet to which the energy has been applied, thereby displacing the predefined discrete piece area pasted on the part of the adhesive sheet to form the discrete piece.

A discrete piece forming method comprising:

• dividing a work by forming a crack in the work, to form a discrete piece, the work having (i) a pre-pasted adhesive sheet containing a swell grain which swells by application of a predetermined energy, (ii) a modified part, which is a part of the work where a property of the work is modified but the work is not cut apart, and (iii) a predefined discrete piece area surrounded by the modified part or surrounded by the modified part and an outer edge of the work in a state in which the work remains as a substantially single body without being divided until the crack is formed in the work, and the dividing forming the crack in the work with the modified part serving as a starting point by applying external force to the work,
• wherein the dividing includes applying the energy to a part of the adhesive sheet to swell the swell grain contained in the part of the adhesive sheet to which the energy has been applied, thereby displacing the predefined discrete piece area pasted on the part of the adhesive sheet to form the discrete piece.