Multi-layer Pattern Formation via Die Form Transfer
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Solution Overview
Problem
Existing methods for forming patterns on substrates struggle to achieve precise registration of multiple colors, leading to difficulties in creating visually striking and secure optical effects for security documents.
Innovation Solution
A method involving a die form with recesses, where multiple curable materials are applied and cured in stages to create multi-layer patterns, allowing for precise control of pattern elements and colors without the need for precise registration of separately applied components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If multiple patterns are applied separately at downstream locations, then multiple colors can be achieved, but precise registration between components becomes difficult
Solution Approach 1:
The patent combines multiple pattern application steps into a single integrated process where a pickup layer captures multiple pattern components simultaneously from a master pattern, eliminating the need for separate downstream applications and ensuring precise registration through a single transfer operation
Solution Approach 2:
The pickup layer serves as an intermediary element that temporarily holds multiple pattern components and transfers them to the final substrate in a single operation, mediating between the master pattern and the final multi-color pattern to ensure precise registration
2Device complexity
If patterns are formed using traditional single-material methods, then the process is simple, but visually striking optical effects are limited
Solution Approach 1:
The patent employs multiple curable materials with different optical properties applied in sequence to the same pattern structure, creating composite pattern elements that produce enhanced optical effects such as lenticular and moiré magnification effects while maintaining a relatively simple single-step transfer process
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 creation of visually striking multi-layer patterns with precise control over color and optical properties, enhancing the security and authenticity of documents by producing complex optical effects like lenticular and moiré magnification effects.
Implementation Method 1
The curable materials are applied to the die form surface and cured to form pattern elements
Data Source
AI summary
A method of applying a pattern formed of two different materials to a pattern support layer includes: providing a die form having a surface with recesses defining the pattern; applying a first curable material to a surface first region, received in some of the first region recesses and partially filling a first region recess set; applying a second curable material to some of the surface first region, the second curable material at least partially fills the first set of the first region recesses; contacting a pattern support layer with the die form surface to cover the recesses containing both the first and second curable materials; separating the pattern support layer from the die form surface, the first and second curable materials in the covered recesses removed therefrom and retained on the pattern support layer; and curing the first and second curable materials during and/or after the second and third steps.