Adhesion Modification Layer for Flexible Semiconductor Substrate Bonding
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Solution Overview
Problem
The electronics industry faces challenges in fabricating electronic devices with flexible substrates, particularly in achieving improved electrical characteristics, reducing bowing, warping, and distortion, while maintaining effective bonding and decoupling processes.
Innovation Solution
A method involving the use of a carrier substrate and an adhesion modification layer, where the adhesion modification layer is positioned between the device substrate and the carrier substrate, enhancing the bonding force and allowing for indirect coupling with a greater bonding force than direct coupling, facilitating the decoupling process with minimal residual adhesive.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If direct coupling between device substrate and carrier substrate is used, then bonding force is insufficient, but adding adhesion modification layer increases device complexity
Solution Approach 1:
An adhesion modification layer is introduced as an intermediary between the device substrate and carrier substrate. This layer specifically modifies the carrier substrate surface to enhance adhesion to the device substrate, achieving greater bonding force than direct coupling while maintaining reasonable device complexity through targeted surface modification rather than complete structural redesign
2Reliability
If adhesive is used for bonding, then residual adhesive remains after decoupling causing defects, but eliminating adhesive simplifies the bonding process
Solution Approach 1:
The adhesive layer is completely removed (taken out) from the final device structure through decoupling processes. The adhesion modification layer enables sufficient bonding during manufacturing without requiring permanent adhesive residues, allowing clean extraction of the adhesive after serving its bonding purpose
Solution Approach 2:
The adhesion modification layer is applied in advance to the carrier substrate surface before bonding. This preliminary surface modification ensures optimal adhesion properties during the bonding process, enabling effective bonding without requiring excessive adhesive that would later need removal, thus simplifying the overall manufacturing process
3Manufacturing precision
If flexible substrate is processed without adhesion modification layer, then processing defects occur, but adding adhesion modification layer improves manufacturing precision
Solution Approach 1:
The adhesion modification is applied locally to the carrier substrate surface rather than requiring modification of the entire device structure. This localized surface treatment improves manufacturing precision at the critical bonding interface while minimizing overall device complexity by affecting only the necessary region
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
This method improves the electrical characteristics and reduces defects by ensuring effective bonding and decoupling of flexible substrates from rigid substrates, minimizing bowing, warping, and distortion, and reducing the complexity and cost associated with residual adhesive issues.
Implementation Method 1
the adhesion modification layer is configured so that the device substrate indirectly couples with the carrier substrate by way of the adhesion modification layer with a greater bonding force than if the device substrate coupled with the carrier substrate absent the adhesion modification layer
Data Source
AI summary
Some embodiments include a method. The method can comprise: providing a carrier substrate; providing an adhesion modification layer over the carrier substrate; providing a device substrate; and coupling the device substrate and the carrier substrate together, the adhesion modification layer being located between the device substrate and the carrier substrate when the device substrate and the carrier substrate are coupled together. In these embodiments, the adhesion modification layer can be configured so that the device substrate couples indirectly with the carrier substrate by way of the adhesion modification layer with a first bonding force that is greater than a second bonding force by which the device substrate couples with the carrier substrate absent the adhesion modification layer. Other embodiments of related methods and devices are also disclosed.