Patent ID: 7222774

Claim:
An electronic component mounting method in which an electronic component is sucked and held by each of a plurality of mounting nozzles provided in a mounting head so as to be mounted on an electronic component mounting portion of a board, comprising: a component holding step for sucking and holding electronic components by said plurality of mounting nozzles of said mounting head; a provisional positioning step for provisionally positioning the electronic component sucked and held by one of said plural mounting nozzles above one electronic component mounting portion; an observing step in which both an image of the provisionally positioned electronic component and an image of the electronic component mounting portion are acquired by an observation head located in a space defined between said provisionally positioned electronic component and the electronic component mounting portion; a relative positional relationship detecting step for detecting a relative positional relationship between said provisionally positioned electronic component and said electronic component mounting portion based upon said images of both said electronic component and said electronic component mounting portion, which are acquired in said observing step; a step for sequentially executing said provisional positioning step, said observing step, and said relative positional relationship detecting step as to all of the electronic components sucked and held by other mounting nozzles; an observation head evacuating step for evacuating said observation head from an upper space of the board; and a step in which such a mounting operation that the electronic components sucked and held by said plurality of mounting nozzles are positioned so as to be mounted on the electronic component mounting portions by transporting said mounting head while reflecting thereto the relative positional relationship detected in said relative positional relationship detecting step is carried out with respect to all of the electronic components.