| 摘要 |
PURPOSE: A tool offset method and an apparatus of a wire bonder are provided to obtain automatically tool offset by using a prism unit having a '+' shaped mark. CONSTITUTION: A tool offset apparatus is provided with a vision pattern recognition system(10), a bond head(21), a worktable(23), a prism unit(20), and a central processing unit(30). The vision pattern recognition system(10) includes a camera(14) having a lens tube(15), and a monitor(11) for displaying a recognized image from the camera(14) onto a screen(12). The bond head(21) is installed with the camera(14) and a tool(22). The worktable(23) fixes a work object under the camera(14) and the tool(22). The central processing unit(30) analyzes the recognized image from the camera(14) and controls the bond head(21). The prism unit(20) is composed of a prism(25), and a fixing table(24). The prism(25) has a '+' shaped mark(26) on a partial portion of the prism(25). The prism(25) is fixed on the fixing table(24). |
