Patent ID: 7306132

Claim:
A bonding apparatus comprising: a bonding arm which has a capillary at one end thereof; a front link in which a lower end portion thereof is rotatably connected to said bonding arm via supporting shafts and an upper portion thereof is rotatably connected to a bonding head via said supporting shafts; a rear link in which a lower end portion thereof is rotatably connected to a rear end portion of said bonding arm via said supporting shafts and an upper portion thereof is rotatably connected to said bonding head via said supporting shafts, and a position of a center of gravity thereof is set above said supporting shafts and is set on said bonding arm side about said supporting shaft of said upper portion thereof; and a driving motor which drives said capillary upward and downward; a virtual center of rotation of said capillary is located on a bonding surface and is set to be at a point of intersection between an extension of a line that connects upper and lower centers of rotation of said front link and an extension of a line that connects upper and lower centers of rotation of said rear link; and said driving motor including a stationary element fastened to said bonding head, and a rotational element of said driving motor attached to an upper end portion of said rear link to drive rotatably about an upper center of rotation of said rear link so as to cancel inertial forces generated from said bonding arm and said front link by operating said bonding apparatus.