To automatically calculate a light volume required for an ultraviolet-ray curable tape to be used while preventing problems caused by a shortage of light volume and an excess of light volume.
In a method for light volume calculation, the adhesion strength of an ultraviolet-ray curable tape (11 or 21) irradiated by an ultraviolet-ray irradiation section (61) is measured by an adhesion strength measurement section (71) in accordance with the amount of ultraviolet rays, and an amount of ultraviolet rays in accordance with a predetermined adhesion strength is calculated based on the measured adhesion strength of the ultraviolet-ray curable tape. The predetermined adhesion strength may be stored in advance in a storage memory or may be determined in accordance with at least one of the kind of the ultraviolet-ray curable tape and the elapsed time of the ultraviolet-ray curable tape.
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Jun Tsuruta
Tetsuro Shimada
Hirose Shigeki
Masaya Nishiyama