High Temperature Elastic Roller for Uniform Thermo-Compression Bonding
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Solution Overview
Problem
Conventional thermo-compression bonding techniques often result in non-uniform bonds due to equipment unevenness and the use of rigid rollers that cannot operate at high temperatures, leading to low pressure and poor bonding quality.
Innovation Solution
A thermo-compression bonding tool utilizing a high temperature elastic roller with a pivoting and heated backing plate to apply uniform pressure and heat across the substrate, ensuring consistent bonding of metal sheets to substrates, even with varying thicknesses or non-planar surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional rigid rollers are used in thermo-compression bonding, then the equipment structure is simple, but the bonding uniformity deteriorates due to equipment unevenness and inability to operate at high temperatures
Solution Approach 1:
The patent changes the material parameter of the roller from conventional rigid materials to high-temperature elastic materials (such as ceramic-coated rollers or specialized elastomers) that can operate at bonding temperatures while providing elastic compliance. This allows the roller to deform and conform to substrate thickness variations, maintaining uniform bonding pressure across the substrate surface even when equipment unevenness exists.
Solution Approach 2:
The patent introduces a pivoting backing plate mechanism that allows the roller support structure to dynamically adjust its angle and position. The backing plate can pivot to accommodate substrate thickness variations and maintain optimal contact between the roller and substrate, enabling the system to adapt to different bonding conditions and maintain uniform pressure distribution.
2Manufacturing precision
If conventional rollers are used, then the device complexity is low, but the bonding quality deteriorates at high temperatures due to low pressure and poor thermal stability
Solution Approach 1:
The patent changes the thermal and mechanical parameters of the roller material to high-temperature resistant elastic materials that maintain their structural integrity and elastic properties at bonding temperatures (typically 150-300°C). The ceramic coating or specialized high-temperature elastomer composition enables the roller to operate stably at these temperatures while providing consistent elastic pressure for high-quality bonding.
Solution Approach 2:
The patent employs composite material structures, such as ceramic-coated metal rollers or multi-layer elastic materials with high-temperature stability. The composite structure combines the thermal stability of ceramic or heat-resistant materials with the elastic compliance needed for uniform pressure application, enabling the roller to function effectively at high bonding temperatures.
3Manufacturing precision
If rigid rollers are used for bonding, then the equipment is simple to operate, but the pressure uniformity deteriorates on substrates with varying thicknesses or non-planar surfaces
Solution Approach 1:
The patent changes the mechanical parameter of the roller from rigid to elastic, allowing the roller to deform and conform to substrate surface variations. The elastic material enables the roller to adapt its shape to match non-planar surfaces or substrates with thickness variations, maintaining uniform pressure distribution across the entire bonding area without requiring complex adjustment mechanisms.
Solution Approach 2:
The patent introduces a pivoting backing plate that provides dynamic adjustment capability. The backing plate can rotate or pivot to change the roller's contact angle and position, allowing the system to automatically adapt to substrate thickness variations and maintain optimal bonding pressure across uneven surfaces, combining simplicity with adaptability.
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 solution achieves uniform bond pressure and high-temperature bonding, preventing non-uniformity and improving the efficiency and quality of the bonding process, enabling the formation of efficient solar cell structures.
Implementation Method 1
a heated backing plate located above the elastic roller... applying pressure and heat to the elastic roller as the elastic roller rolls across a metal sheet disposed above the substrate
Implementation Method 2
an elastic roller located above the stage... configured to apply pressure to the metal sheet as the elastic roller rolls across the metal sheet
Data Source
AI summary
A thermo-compression bonding tool with a high temperature elastic element, and methods of bonding a metal sheet to a substrate using a thermo-compression bonding tool are described. In an example, a system for bonding a metal sheet to a substrate includes a stage to support the substrate and an elastic roller located above the stage. The elastic roller includes a high temperature material. The system also includes a heated backing plate located above the elastic roller. The backing plate is configured to apply pressure and heat to the elastic roller as the elastic roller rolls across a metal sheet disposed above the substrate.