Patent ID: 7684061

Claim:
An electronic component mounting apparatus for mounting an electronic component picked up by a component holding member from an electronic component feed unit onto a mounting object, comprising: a component height detection unit for detecting a height size of the electronic component held by the component holding member, the component height detection unit comprising: a beam projector for projecting a light beam along an optical axis; a beam receiver which is placed on the optical axis of the beam projector in opposition to the beam projector, for receiving the light beam projected from the beam projector; a projection-side orifice provided in the beam projector, for partly intercepting the light beam projected from the beam projector so that a projection spot diameter of the light beam is narrowed; a reception-side orifice provided in the beam receiver, for partly intercepting the light beam projected from the beam projector so that a reception spot diameter of the light beam received by the beam receiver is narrowed; and a light-reception-sensitivity setting unit for enhancing light-reception sensitivity of the beam receiver so as to compensate a quantity of light interception by the reception-side orifice in the beam receiver, wherein the electronic component held by the component holding member is placed on the optical axis between the beam projector and the beam receiver in the component height detection unit, a decrease of received light quantity of the light beam received by the beam receiver is detected by the component height detection unit, by which the height size of the electronic component is detected, and then based on the height size, the electronic component is mounted onto the mounting object.