Wafer-Scale Optical Element Replication via Substrate Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wafer-scale optical element replication is constrained by substrate thickness requirements for mechanical stability, limiting design flexibility and increasing costs due to the need for standard thickness substrates, which restricts the optical design parameters.
Innovation Solution
A method involving a substrate with pre-defined replication sites, such as through holes or blind holes, where replication material is added and hardened between replication tools and the substrate, allowing for independent control of optical element thickness and reducing substrate material and quality requirements, enabling thinner and more flexible optical designs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If standard thickness substrates are used to ensure mechanical stability, then mechanical stability is improved, but design flexibility and optical design parameters are limited
Solution Approach 1:
The optical element is segmented into two independent parts: the substrate providing mechanical stability and the replication material forming the optical structure. This segmentation allows each component to be optimized independently - the substrate for mechanical properties and the replication material for optical performance, resolving the contradiction between mechanical stability and design flexibility
Solution Approach 2:
The optical functionality is extracted from the substrate itself and placed in a separate replication material layer. This extraction allows the substrate to focus solely on providing mechanical stability while the replicated optical elements provide the required optical design flexibility, enabling thin substrates to be used without compromising mechanical strength
2Stability of the object's composition
If standard thickness substrates are used, then mechanical stability is ensured, but substrate cost increases due to limited thickness options
Solution Approach 1:
The substrate thickness parameter is changed from standard fixed values to customizable thin dimensions. By using replication material to provide the optical functionality, the substrate can be made thinner without compromising mechanical stability, reducing material consumption and cost while maintaining performance
3Manufacturing precision
If replication material is added to both sides of the substrate, then complete optical element replication is achieved, but process complexity increases
Solution Approach 1:
The replication process merges multiple operations into a single step by using a dual-sided replication tool that simultaneously replicates optical elements on both sides of the substrate. This combining of operations maintains complete optical element replication while reducing process complexity compared to sequential single-sided replication
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 approach eliminates thickness constraints, reduces material and cost requirements for substrates, and allows for more design flexibility, enabling the creation of thinner optical elements with improved mechanical stability and reduced component count in stacked assemblies.
Implementation Method 1
In the course of a replication process, the replication material is hardened
Data Source
Figure 1~4
Figure 5~7b
Figure 7c~8
AI summary
A method of replicating at least one optical element is provided, the method including the steps of providing a substrate (1) with two large sides (1.1, 1.2) and at least one pre-defined replication site defined by a through hole (2) or blind holes at corresponding locations on both large sides of the substrate; adding, by replication, a replicated structure to the substrate, the replicated structure adhering to the substrate and comprising, at said replication site, replication material in said through hole or in said two blind holes, respectively and a first replicated surface and a second replicated surface, the first and second replication surfaces facing towards opposite sides.