Laminate with Controlled Absorption Edges to Suppress Pattern Thickening
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Solution Overview
Problem
The existing methods for producing metal layer-containing laminates result in pattern thickening of the metal wiring, which is undesirable for applications such as touch panel sensors and touch panels.
Innovation Solution
A laminate configuration comprising a substrate, a plated layer forming layer, and a temporary protective film, where the plated layer forming layer contains a polymerization initiator and specific compounds, and the absorption edges of the temporary protective film, polymerization initiator, and substrate satisfy a particular relationship, allowing controlled light absorption to prevent pattern thickening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a temporary protective film is disposed between the photo mask and the plated layer forming layer, then the yield of the substrate with a patterned plated layer is improved, but the metal wiring pattern becomes thicker (pattern thickening occurs)
Solution Approach 1:
The patent applies parameter changes by carefully controlling the light absorption characteristics (absorption edges) of the substrate, polymerization initiator, and temporary protective film. By satisfying specific mathematical relationships between their absorption edges (λ0/λ1 > 1.05 and λ1/λ2 > 1.05), the patent optimizes light transmission to prevent pattern thickening while maintaining high yield. This quantitative parameter control resolves the contradiction between productivity improvement and manufacturing precision.
Solution Approach 2:
The patent uses the temporary protective film as an intermediary element between the photo mask and the plated layer forming layer. This intermediary film, when combined with the substrate acting as another intermediary, mediates the light transmission to achieve both high yield and precise pattern thickness control. The intermediaries enable the system to balance productivity and manufacturing precision.
2Manufacturing precision
If the absorption edges of the temporary protective film, polymerization initiator, and substrate are controlled to satisfy specific relationships, then pattern thickening is suppressed, but the device complexity increases
Solution Approach 1:
The patent manages device complexity by establishing clear mathematical relationships between absorption edge parameters (λ0/λ1 > 1.05 and λ1/λ2 > 1.05). These quantitative criteria provide a systematic framework for selecting materials with appropriate light absorption characteristics, transforming a complex multi-parameter optimization problem into a manageable set of ratio-based selection rules.
Solution Approach 2:
The patent applies local quality by focusing control efforts on specific critical parameters (the absorption edges of three key components) rather than attempting to control all material properties. By identifying and controlling only the absorption edge characteristics that directly affect light transmission and pattern formation, the patent reduces overall device complexity while maintaining manufacturing precision.
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 configuration effectively suppresses pattern thickening, improving the yield of patterned plated layers and maintaining the desired thickness of the metal layer, enhancing the performance of touch panel sensors and touch panels.
Implementation Method 1
the plated layer forming layer contains a polymerization initiator and Compound X or Composition Y shown below, and an absorption edge λ0 on the long wavelength side of an ultraviolet-visible absorption spectrum of the temporary protective film, an absorption edge λ1 on the long wavelength side of an ultraviolet-visible absorption spectrum of the polymerization initiator
Data Source
AI summary
The present invention provides a laminate with which a metal layer-containing laminate with the occurrence of pattern thickening being suppressed can be obtained. Further, the present invention provides methods for producing a substrate with a patterned plated layer and a metal layer-containing laminate, as well as a touch panel sensor and a touch panel.The laminate of the present invention is a laminate including a substrate, a plated layer forming layer, and a temporary protective film in this order, in which the plated layer forming layer contains a polymerization initiator and Compound X or Composition Y, and an absorption edge λ0 on the long wavelength side of an ultraviolet-visible absorption spectrum of the temporary protective film, an absorption edge λ1 on the long wavelength side of an ultraviolet-visible absorption spectrum of the polymerization initiator, and an absorption edge λ2 on the long wavelength side of an ultraviolet-visible absorption spectrum of the substrate satisfy the relationship represented by Expression (Z).