Capillary Jig With Pivoting Arm For Wire Bonding
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Solution Overview
Problem
The manual placement of capillaries in wire bonding machines is prone to errors and damage, leading to incorrect wire bonds due to the difficulty in precisely positioning these small and delicate components within the machines.
Innovation Solution
A jig with a first arm and a pivotally attached second arm is used to securely hold and position the capillary, ensuring correct alignment with the capillary mount of the wire bonding machine, utilizing a tapered opening to match the capillary's shape and a spring device to limit insertion force and prevent damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If capillaries are manually placed using tweezers, then the operation is simple and quick, but the positioning precision is poor and capillaries are easily damaged
Solution Approach 1:
A jig is introduced as an intermediary device between the operator and the capillary. The jig includes a holder with a tapered opening that receives the capillary, and a pressing member that applies controlled force to push the capillary into the capillary mount. This intermediary device enables precise positioning and controlled insertion without requiring direct manual manipulation with tweezers, thereby improving positioning precision while protecting the fragile capillary from damage.
2Reliability
If manual positioning is used, then the device complexity is low, but the reliability of wire bonding decreases due to incorrect positioning
Solution Approach 1:
The jig serves as a mediator that ensures reliable capillary positioning and insertion. The holder with tapered opening securely holds the capillary in the correct orientation, and the pressing member with controlled force mechanism ensures the capillary is inserted to the correct depth into the capillary mount. This intermediary device eliminates the variability and errors associated with manual positioning, thereby improving wire bonding reliability.
Solution Approach 2:
The pressing member is designed to apply a controlled amount of force during capillary insertion. By controlling the insertion force parameter, the device ensures that the capillary is pushed into the capillary mount with sufficient force to achieve proper positioning, but not so much force as to damage the fragile capillary. This parameter control is critical for achieving consistent and reliable wire bonding results.
3Ease of operation
If tweezers are used to hold capillary in position, then the operation is straightforward, but the capillary is easily damaged or incorrectly positioned
Solution Approach 1:
The jig acts as an intermediary that simplifies the operation while improving reliability. The operator simply needs to place the capillary into the holder's tapered opening and activate the pressing member, which then automatically performs the precise positioning and insertion into the capillary mount. This eliminates the need for the operator to skillfully manipulate the fragile capillary with tweezers while maintaining it in the correct position, thereby both simplifying the operation and improving positioning reliability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The jig facilitates precise and secure positioning of capillaries, reducing the likelihood of incorrect wire bonds and capillary damage, thereby enhancing the reliability of the wire bonding process.
Implementation Method 1
a spring device to limit insertion force and prevent damage
Implementation Method 2
A second arm is pivotally attached to the first arm
Data Source
AI summary
A jig for holding a wire bonding capillary includes a first arm and an opening in the first arm, wherein a wire bonding capillary is receivable within the opening. A second arm is pivotally attached to the first arm. The second arm has a surface facing the first arm, wherein the surface is contactable with a capillary mount of a wire bonding machine.