Sacrificial-Layer Template Replication for Defect-Free Pattern Peeling
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Solution Overview
Problem
Pattern defects occur during the peeling of a surface with a desired pattern from a template substrate in the imprint process, leading to inefficiencies and increased manufacturing costs.
Innovation Solution
A method involving the formation of a sacrificial layer on a substrate, followed by bonding a replication material layer with an adhesive film, peeling off the substrate and sacrificial layer to create a replication portion with a second pattern, and then removing the sacrificial layer to reduce pattern defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a surface with a desired pattern is peeled off from a template substrate, then the pattern can be transferred, but pattern defects occur during peeling
Solution Approach 1:
A sacrificial layer is introduced as an intermediary between the template substrate and the replication material layer. This sacrificial layer enables stress-free peeling by being selectively removed, preventing pattern defects that would otherwise occur during direct peeling from the template substrate.
Solution Approach 2:
The sacrificial layer is extracted or removed after serving its purpose of enabling pattern transfer. This removal eliminates the source of stress that causes pattern defects, allowing the replicated pattern to be obtained without deformation or damage.
2Manufacturing precision
If the sacrificial layer is removed after replication, then pattern defects are reduced, but additional manufacturing steps are required
Solution Approach 1:
The sacrificial layer is designed with specific material properties (selective etchability, adhesion characteristics) that allow it to be easily removed after serving its function. By changing the parameters of the sacrificial layer material, the removal process becomes simple and integrated into the existing manufacturing workflow without requiring complex additional steps.
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
Reduces pattern defects and lowers manufacturing costs by minimizing stress on the pattern during peeling and ensuring precise replication.
Implementation Method 1
bonding a surface of the replication material layer opposite to a surface of the replication material layer in contact with the sacrificial layer to a template substrate with an adhesive film sandwiched therebetween
Data Source
AI summary
According to one embodiment, a method of manufacturing a template includes forming a sacrificial layer on a substrate. A first pattern is formed on a surface of the sacrificial layer opposite to a surface of the sacrificial layer in contact with the substrate. A replication material layer is formed on a surface of the first pattern of the sacrificial layer. A surface of the replication material layer opposite to a surface of the replication material layer in contact with the sacrificial layer is bonded to a template substrate. The replication material layer is cured to form a replication portion having a second pattern corresponding to the first pattern. The substrate is removed from the sacrificial layer to provide the template including the template substrate and the replication portion.