Patent ID: 7686204

Claim:
A wire bonding apparatus comprising: a moving mechanism for moving, in XYZ directions, a capillary having a wire inserted therethrough and executing bonding on a work; an electrical conduction state acquisition device for detecting an electrical conduction state by allowing an electric current to flow from the wire to the work; a first means for taking an image of the work; a light path device for conducting an elevation image of a vicinity of a tip end of the capillary to the first means; a ball formation device for forming a tip end of the wire into a ball of a prescribed shape; and a computer for controlling wire bonding between a first bonding point and a second bonding point, said computer including a second means for electrically detecting non-bonding between the first bonding point and the wire by processing electrical conduction state signals acquired by the electrical conduction state acquisition device and indicative of electrical conduction state between the first bonding point and the wire, a third means for optically detecting non-bonding between the first bonding point and the wire by processing plane images acquired by the first means, a fourth means for detecting a shape of a tip end of the wire by processing elevation images of the wire in the vicinity of the tip end of the capillary acquired by said first means via the light path device, and a fifth means for, when non-bonding is detected by the second means and non-bonding is detected by the third means, reforming the tip end of the wire into a ball of prescribed shape by the ball formation device, based on the tip end shape of the wire detected by the fourth means, and executing rebonding on the first bonding point.