Patent ID: 7483277
Filing Date: 2009-01-27
Classification: H05K

Abstract:
1. A method for inspecting component mounting accuracy in a component mounting operation mounting a component held by a component holding member on a board, comprising: with use of an inspection-use component having an almost rectangular parallelepiped shape and having an irreflective surface as one surface and a reflecting surface as a surface opposed to the one surface, while applying light to the reflecting surface of the inspection-use component in a state in which the irreflective surface is held by the component holding member, picking up a real image of the inspection-use component formed by reflected light created by the applied light; recognizing a posture of the inspection-use component held by the component holding member by recognizing image data of the picked up real image; mounting the inspection-use component with the component holding member in such a way that the reflecting surface of the inspection-use component is disposed in a component mounting position on a component mounting side-surface of an inspection-use board which is formed from a light transmitting material and which has a reflecting surface disposed on a surface opposed to the component mounting side-surface and facing the component mounting side-surface, while correcting posture-displacement between the recognized holding posture and a reference holding posture; while applying light to the component mounting-side surface of the inspection-use board so as to transmit the applied light through the component mounting-side surface and reflect the applied light on the reflecting surface, picking up an image of an outline of the inspection-use component formed by reflected light coming from around the inspection-use component through the component mounting-side surface; and calculating an actual mounting position of the inspection-use component by recognizing image data of the picked up outline, and then obtaining a component mounting accuracy by calculating a difference between the actual mounting position and a preset component mounting position.