Bonding apparatus

1. A bonding apparatus comprising:

a backup unit comprising a light-transmissive transmission member having a support surface which supports at least a bonding region of a light-transmissive board from below;

a pressure-bonding unit which presses, toward the board, an electronic component placed on the bonding region via a photo-curable adhesive agent such that the electronic component is pressure-bonded to the board; and

a light irradiation unit which irradiates the support surface from below with light which promotes hardening of the adhesive agent provided between the board and the electronic component,

wherein the electronic component is bonded to the board by pressing the electronic component mounted on a top surface of the adhesive agent in a state in which light from the light irradiation unit is incident upon the adhesive agent through the supporting surface,

wherein said bonding apparatus further comprises a light distribution measuring unit which measures a distribution of light from the light irradiation unit in the supporting surface,

wherein the light distribution measuring unit comprises:

a photodetector which detects the light from the light irradiation unit and incident upon a given position in an irradiated area of the supporting surface; and

a photodetector moving unit which moves the photodetector to a plurality of measurement positions in the irradiated area,

wherein the photodetector moving unit comprises a horizontal movement mechanism comprising: a first movement table which moves the photodetector in a first horizontal direction; and a second movement table which moves the photodetector in a second horizontal direction perpendicular to the first horizontal direction, and

wherein the photodetector moving unit also serves as a board positioning mechanism which moves the board to position the bonding region on the supporting surface.

2. The bonding apparatus according to claim 1 , further comprising:

a luminance distribution data creating unit which creates luminance distribution data representing a luminance distribution, based on a result of measurement at the plurality of measurement positions in the irradiated area; and

a luminance distribution display unit which displays the luminance distribution.

3. The bonding apparatus according to claim 1 , wherein the photodetector is detachably attached to the board positioning mechanism.