Radiation Curing Resin for Display Patterning Without Thermal Transfer
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Solution Overview
Problem
The production of display bodies with micro-relief structures faces challenges due to the need for materials with high heat resistance and chemical resistance, particularly in thermal transfer and acid/alkali etching processes, which limits material selection and increases complexity.
Innovation Solution
A method involving a patterning target layer and a resin layer, where the resin layer is irradiated to form cured portions with varying adhesion strengths, allowing for the patterning of the target layer without heat or acid/alkali treatment, thereby relaxing material resistance requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If thermal transfer using a heated roll is used to pattern the micro-relief structure, then the micro-relief structure can be formed, but the materials must have high heat resistance which limits material selection
Solution Approach 1:
The patent replaces the thermal transfer mechanism (heated roll) with a radiation-based curing mechanism. The resin layer is irradiated with radiation (e.g., UV light) to cure specific areas, creating adhesion strength differences without requiring high temperatures. This substitution eliminates the need for heat-resistant materials while achieving the same patterning function.
Solution Approach 2:
The patent changes the curing parameter from thermal energy (heat) to radiation energy. By using radiation to cure the resin layer instead of heat, the process avoids thermal damage to materials while still achieving the necessary structural changes for patterning. This parameter change allows use of materials that would otherwise be damaged by heat.
2Manufacturing precision
If acid or alkali corrosive etching is used to pattern the reflective layer, then the reflective layer can be patterned, but the materials must have resistance to acid or alkali which limits material selection
Solution Approach 1:
The patent replaces the chemical etching mechanism (acid or alkali corrosive) with a radiation-based curing mechanism. By irradiating the resin layer to create cured portions with different adhesion strengths, the reflective layer is patterned through mechanical separation rather than chemical corrosion. This eliminates the need for acid/alkali resistance in materials.
Solution Approach 2:
The patent introduces a resin layer as an intermediary between the patterning process and the reflective layer. The resin layer is irradiated to create cured portions that selectively adhere to the reflective layer, allowing pattern transfer without direct chemical exposure to the reflective layer materials. This intermediary protects the reflective layer materials from chemical etching.
3Reliability
If multiple restrictive processes (thermal transfer and chemical etching) are used, then the display body can be manufactured with required features, but the production process complexity increases
Solution Approach 1:
The patent merges the patterning of the micro-relief structure and the reflective layer into a single integrated process. By irradiating the resin layer that contacts both structures, cured portions are formed that simultaneously pattern both the micro-relief structure and the reflective layer. This consolidation eliminates the need for separate thermal transfer and chemical etching steps, reducing process complexity while maintaining authenticity features.
Solution Approach 2:
The resin layer serves multiple functions: it acts as the patterning medium, provides adhesion control through radiation curing, and enables simultaneous pattern transfer to both the micro-relief structure and reflective layer. This multi-functionality replaces multiple specialized processes, simplifying the overall production workflow while ensuring the display body meets security requirements.
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 enables the patterning of display bodies without the need for thermal transfer or acid/alkali treatment, reducing material restrictions and simplifying the production process while maintaining the necessary structural integrity and authenticity features.
Implementation Method 1
the resin layer contains a resin curable by irradiation... irradiating the resin layer which is in contact with the patterning target layer with radiation to form a plurality of cured portions by partial curing of the resin layer
Data Source
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AI summary
A method of producing a display body includes: providing, on a surface of a substrate, a patterning target layer and a resin layer containing a resin curable by irradiation with radiation to be in contact with each other in order; irradiating the resin layer which is in contact with the patterning target layer with radiation to form a plurality of cured portions by partial curing of the resin layer so as to establish higher adhesion strength between the cured portions and the patterning target layer than adhesion strength between the surface and the patterning target layer and to establish lower adhesion strength between the uncured portion in the resin layer and the patterning target layer than the adhesion strength between the surface and the patterning target layer, and separating the resin layer from the patterning target layer to thereby separate areas of the patterning target layer which overlap the cured portions in plan view facing the surface, together with the resin layer, from the substrate.