Replica Master Mold Segmentation for 3D Conformability
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Solution Overview
Problem
Existing replica master molds with flexible polymer stamps face distortion issues when heated to conform to three-dimensional shapes, leading to inaccuracies in transferring fine irregular patterns.
Innovation Solution
A replica master mold with a base material layer and a surface shape body having a fine irregular pattern, where the surface shape body's softening temperature is higher than the base material layer's, and intermediate layers are used to prevent distortion, ensuring accurate pattern transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single-layer flexible polymer film is used to create a replica master mold, then the mold can be deformed to conform to three-dimensional shapes, but the fine irregular pattern distorts when heated due to softening of the polymer material
Solution Approach 1:
The replica master mold is divided into two distinct layers: a base material layer providing flexibility and conformability, and a surface shape body layer maintaining the fine irregular pattern. This segmentation allows each layer to perform its specific function without interfering with the other, resolving the contradiction between adaptability and precision.
Solution Approach 2:
The invention uses a composite structure combining a flexible base material (such as COC polymer) with a high-temperature-resistant surface shape body (such as inorganic compound or high-Tg polymer). This composite material approach enables the mold to simultaneously achieve flexibility for 3D conformability and thermal stability for pattern accuracy.
2Ease of operation
If the polymer stamp is heated to deform in conformity with the formation object, then it can adapt to complex shapes, but the irregular portions soften causing distortion of the fine irregular pattern
Solution Approach 1:
By separating the mold into a base material layer that undergoes thermal deformation and a surface shape body layer that maintains structural stability, the invention enables the base to adapt to complex shapes while the surface layer preserves the fine irregular pattern integrity during heating operations.
Solution Approach 2:
Different parts of the replica master mold have different thermal properties: the base material layer has low softening temperature for easy deformation, while the surface shape body has high softening temperature for pattern stability. This local quality differentiation resolves the contradiction between ease of operation and compositional stability.
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 effectively prevents distortion of fine irregular patterns and maintains transfer accuracy, even when the replica master mold is deformed to conform to complex shapes.
Implementation Method 1
when the polymer stamp is heated to deform in conformity with the shape of the formation object
Implementation Method 2
A softening temperature of the surface shape body is higher than a softening temperature of the base material layer
Data Source
Figure 1~2
Figure 3A~3B
Figure 4A~4B
AI summary
A replica master mold 10 comprises: a base material layer 11; and a surface shape body 12 formed on the base material layer 11 and having a fine irregular pattern, wherein a softening temperature of the surface shape body 12 is higher than a softening temperature of the base material layer 11 and wherein the replica master mold 10 has a curved surface whose curvature radius is greater than a height of the fine irregular pattern.