Bonding Apparatus Uniform Pressure Control
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Solution Overview
Problem
The bonding process in electric devices often results in mechanical defects and particle-related issues due to non-uniform pressing loads and contamination, leading to inferior bonding quality.
Innovation Solution
A bonding apparatus with a stage, pressing unit, and sensors that control the movement of a pressing head with a heat source to apply uniform pressure and detect changes in capacitance, ensuring equilibrium and minimizing defects by using a dummy film to remove particles and maintain cleanliness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a pressing unit is used to bond electric components, then bonding strength is improved, but non-uniform pressing load causes mechanical defects
Solution Approach 1:
The pressing unit is divided into multiple independent pressing heads, each capable of applying pressure independently. This segmentation allows for more uniform distribution of pressing load across the bonding area, preventing mechanical defects caused by non-uniform pressure while maintaining strong bonding.
Solution Approach 2:
Each pressing head can be independently controlled to apply the appropriate pressing load to its specific region. This local control ensures that each area receives the optimal pressing force needed for strong bonding without causing defects from excessive or insufficient pressure in other areas.
2Manufacturing precision
If sensors are added to detect capacitance changes, then pressing equilibrium is improved, but device complexity increases
Solution Approach 1:
Sensors are installed to detect capacitance changes between the pressing head and the stage, providing real-time feedback on the pressing equilibrium. This feedback mechanism allows the system to monitor and maintain optimal pressing conditions, ensuring manufacturing precision while using a minimal number of sensors strategically positioned to maximize detection effectiveness.
3Manufacturing precision
If a dummy film is used to remove particles, then bonding quality is improved, but loss of substance increases
Solution Approach 1:
A dummy film is used as a disposable component to trap and remove particles that could contaminate the bonding interface. The dummy film is intentionally designed to be consumable and is replaced after each bonding cycle, ensuring high bonding quality while accepting the loss of the film material as a necessary cost for defect prevention.
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 apparatus significantly reduces defect rates by ensuring uniform pressure distribution and particle removal, enhancing the bonding quality between electric components.
Implementation Method 1
a heat source that extends from the pressing head and is configured to transfer heat to the conductive adhesive film and the second electric component
Implementation Method 2
a plurality of sensors at different positions on the stage and configured to sense a change in capacitance with the pressing unit... the capacitance may change in response to a distance between each of the plurality of sensors and the pressing unit
Data Source
AI summary
A bonding apparatus and method includes: a stage configured to fix a first electric component; a pressing unit configured to press a conductive adhesive film and a second electric component onto the first electric component; a driver configured to control movement of the pressing unit along a direction; and a plurality of sensors at different positions on the stage and configured to sense a change in capacitance with the pressing unit, wherein the pressing unit includes a flat metal material in first regions facing the plurality of sensors.