Bonding Tool Alignment via Superimposed Reference Image
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Solution Overview
Problem
Existing systems for adjusting bonding tools in wire bonders, such as those described in U.S. Pat. No. 7,591,408, require complex setup procedures and only guide the edge position of the bonding tool, failing to assist in correcting its orientation accurately.
Innovation Solution
A method and system using an image-capturing device to display a reference bonding tool image on a screen, allowing for alignment of the actual bonding tool with the reference image, eliminating the need for tolerance range calculations and enabling precise adjustment of the bonding tool's position and orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If marking lines representing tolerance range are overlaid onto the display to facilitate positioning of the bonding tool, then the edge position guidance is improved, but the device complexity increases due to additional setup procedure to generate and draw the marking lines
Solution Approach 1:
The patent uses a camera to capture an image of the bonding tool and displays it on a monitor, creating a visual copy of the tool's position. This allows the operator to see the tool's location and orientation without physical inspection, simplifying the adjustment process while maintaining positioning accuracy.
Solution Approach 2:
The patent superimposes a reference image of the bonding tool in the correct position onto the live camera feed. By using visual overlays that show the desired position and orientation, the system provides intuitive guidance without requiring complex tolerance range calculations or multiple setup procedures.
2Measurement precision
If marking lines are used to guide the edge position of the bonding tool, then the positioning aid is provided, but the orientation adjustment capability is insufficient when the bonding tool orientation is incorrect
Solution Approach 1:
The patent transitions from providing only edge position guidance (2D point guidance) to providing full bonding tool visualization including orientation (2D image with angular information). The reference image overlay shows the complete tool geometry and its correct orientation, enabling the operator to adjust both position and orientation simultaneously.
Solution Approach 2:
The camera system acts as an intermediary that captures and displays the bonding tool's actual position and orientation. By comparing the live camera image with the superimposed reference image, the operator can identify both positional and orientational deviations and make comprehensive adjustments.
Data Source
AI summary
A bonding tool is adjusted to a desired operational position by viewing the bonding tool with an image-capturing device and displaying an image of the bonding tool as viewed by the image-capturing device onto a display screen. A corresponding image of a reference bonding tool showing the desired operational position of the bonding tool is superimposed onto the display screen and the position of the bonding tool is adjusted with an adjustment mechanism until the bonding tool as viewed by the image-capturing device is aligned with the superimposed image of the reference bonding tool.