Patent ID: 7043820

Claim:
An electric-component mounting system comprising: a substrate-holding device operable to hold at least one circuit substrate each having a component mounting surface on which electric components are to be mounted; at least one first mounting unit and at least one second mounting unit, each of which has at least one mounting head each operable to receive a selected one of the electric components while said each mounting unit is located in a component-supplying area in which the electric components are supplied, said each mounting head being further operable to mount the electric component onto said component-mounting surface of said at least one circuit substrate held by said substrate-holding device located in a component-mounting area; and a mounting-unit moving device operable to move said at least one first mounting unit and said at least one second mounting unit past each other, between said component-supplying and component-mounting areas in opposite directions, along respective two paths, without an interference between said at least one first mounting unit and said at least one second mounting unit, such that at least portions of said two paths in which said first and second mounting units are moved past each other in the opposite directions are spaced respective different distances from a predetermined reference plane which is parallel to said component-mounting surface of said at least one circuit substrate and which is set at a predetermined position in a direction perpendicular to said component-mounting surface.