Adhesive Composition with Light Absorbers for UV Stability
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Solution Overview
Problem
Wafer processing tapes used in semiconductor manufacturing can decompose under ultraviolet light exposure, leading to contamination and reduced device reliability due to the absence of effective light absorption in existing adhesive compositions.
Innovation Solution
An adhesive composition comprising a resin, a crosslinking agent, and light absorbers such as benzophenone-based, cyanoacrylate-based, and sterically hindered amine-based compounds with ring structures, which absorb ultraviolet rays of 350 nm or less, preventing chemical decomposition of the tape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional adhesive compositions are used in wafer processing tapes, then the tapes can be manufactured and applied for chip separation, but the tapes decompose under ultraviolet light exposure causing contamination and reduced device reliability
Solution Approach 1:
A light absorber is introduced as an intermediary substance in the adhesive composition to absorb ultraviolet light before it can reach and decompose the adhesive or tape components. The light absorber acts as a protective mediator that converts harmful UV energy into harmless forms, preventing the decomposition reaction while allowing the adhesive to maintain its bonding function.
Solution Approach 2:
The harmful ultraviolet light energy is converted into a beneficial effect by using light absorbers that transform UV radiation into harmless thermal energy or other non-damaging forms. This converts the harmful decomposition effect into a protective mechanism where the absorbed energy is dissipated safely without causing chemical breakdown of the tape materials.
2Stability of the object's composition
If light absorbers are added to the adhesive composition to prevent UV decomposition, then the stability and reliability of the tape improve, but the complexity of the composition increases
Solution Approach 1:
The chemical composition parameters of the adhesive are modified by incorporating light absorbers with specific molecular structures and absorption characteristics. By carefully selecting and optimizing the types and concentrations of light absorbers, the composition achieves enhanced UV stability while maintaining manageable complexity through systematic parameter adjustment rather than arbitrary additive inclusion.
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 use of these light absorbers in the adhesive composition layer of wafer processing tapes enhances the stability of the tapes and improves the reliability of semiconductor devices by preventing UV-induced decomposition, ensuring consistent performance during manufacturing processes.
Implementation Method 1
a light absorber that absorbs ultraviolet rays of a given wavelength or less
Data Source
AI summary
An adhesive composition includes a resin, a crosslinking agent, and a light absorber. The light absorber includes at least one selected from the group consisting of a benzophenone-based compound, a cyanoacrylate-based compound having a ring structure, a benzotriazole-based compound, and a sterically hindered amine compound having a ring structure.