Deformable Stamp Detachment for Damage-Free Microstructure Release
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Solution Overview
Problem
The detachment of soft stamps from master stamps or embossing materials is challenging due to their elasticity and low bending resistance, leading to rapid wear and potential destruction of nano/microstructures, while hard stamps are difficult to detach without damage.
Innovation Solution
The use of deformable stamps made from materials like PDMS, PFPE, POSS, and thermoplastic or elastomer, with a method involving deformation of the stamp towards the substrate to detach it, and a device using carrier form elements and fixing elements to facilitate detachment without substrate damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If soft stamps are used for easy detachment, then detachment ease is improved, but stamp durability deteriorates due to rapid wear
Solution Approach 1:
The patent changes the material parameters of the stamp by using composite materials (PDMS combined with reinforcing agents like silica or titania) to simultaneously achieve ease of detachment through elasticity and improved durability through enhanced mechanical strength and wear resistance
Solution Approach 2:
The patent employs composite materials consisting of PDMS as the base elastomer combined with reinforcing particles (silica, titania) or fibrous materials to create a stamp that maintains the elasticity needed for easy detachment while gaining the structural integrity and wear resistance required for durability
2Duration of action of moving object
If hard stamps are used for high durability, then stamp durability is improved, but detachment difficulty increases due to structure damage risk
Solution Approach 1:
The patent modifies the mechanical parameters of the stamp by incorporating elastomeric materials with specific durometer values (Shore A 10-80) that provide sufficient softness for easy detachment while maintaining structural integrity, replacing traditional hard materials
Solution Approach 2:
The patent uses composite materials that combine the softness of elastomers (PDMS) with reinforcing agents to create a stamp that is both durable and easy to detach, eliminating the need for extremely hard materials that cause detachment difficulties
3Ease of operation
If soft stamps with low bending resistance are used, then detachment ease is improved through sequential pulling, but manufacturing precision deteriorates due to structure deformation
Solution Approach 1:
The patent uses composite materials where reinforcing particles (silica, titania) or fibrous materials embedded in the PDMS matrix provide structural support to maintain nanometer and micrometer precision while the elastomeric base material ensures ease of detachment through controlled elasticity
Solution Approach 2:
The patent creates local quality variations within the stamp material, with reinforcing agents concentrated in areas requiring structural stability and precision, while other regions maintain higher elasticity for detachment, achieving both precision and ease of operation
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
Enables easy and damage-free detachment of soft stamps from master stamps and embossing materials, allowing for reusable and efficient stamp production and use, suitable for various substrate sizes and shapes.
Implementation Method 1
The stamp is deformed in direction of the substrate, in order to detach the stamp from the substrate
Data Source
AI summary
The invention relates to a method for detaching a stamp from a substrate, in particular from a master stamp and/or from a product. The stamp is deformed in a direction of the substrate in order to detach the stamp from the susbtrate.