Spectroscopic Sensor Cavity Layer Formation via Handle Substrate Transfer
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Solution Overview
Problem
The existing method for manufacturing spectroscopic sensors is unreliable due to irregularities on the light detection substrate surface, which damages the substrate during the formation of the cavity and mirror layers, making it difficult to achieve high accuracy and reliability.
Innovation Solution
The method involves forming the cavity layer on a handle substrate using nanoimprinting, then transferring the layers to the light detection substrate, preventing damage and ensuring high accuracy, with the handle substrate being removed after the light-transmitting substrate is joined, allowing for precise formation of interference filter units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If nanoimprinting is performed on the light detection substrate to form the cavity layer, then the cavity layer can be formed directly on the final substrate, but the surface irregularities on the light detection substrate prevent high accuracy cavity layer formation
Solution Approach 1:
The manufacturing process is divided into two independent stages: first forming the cavity layer on a handle substrate, then transferring it to the light detection substrate. This segmentation allows each stage to be optimized separately - the handle substrate provides a smooth surface for high-precision nanoimprinting, while the light detection substrate is protected from process damage.
Solution Approach 2:
The handle substrate serves as an intermediary carrier that temporarily holds the cavity layer during formation. It provides a smooth, damage-free surface for nanoimprinting, then transfers the completed cavity layer to the light detection substrate through the light-transmitting substrate, protecting the final substrate from direct exposure to damaging processes.
2Ease of manufacture
If the light detection substrate is used as the base for forming cavity and mirror layers, then the final product structure is achieved, but the substrate is damaged during the formation processes
Solution Approach 1:
The cavity layer is formed in advance on a handle substrate before the light detection substrate is introduced. This preliminary action allows all potentially damaging formation processes to occur on the robust handle substrate, protecting the light detection substrate from damage while still achieving the integrated final structure.
Solution Approach 2:
The cavity layer structure is first created as a copy on the handle substrate through nanoimprinting, then this copied structure is transferred to the light detection substrate. This copying approach allows the delicate final substrate to receive only the completed, non-damaging transfer process rather than exposure to harsh formation conditions.
3Manufacturing precision
If the cavity layer is formed with high accuracy on a smooth surface, then the spectroscopic performance is improved, but the manufacturing process becomes more complex
Solution Approach 1:
The nanoimprinting process is extracted from the final assembly sequence and performed separately on a dedicated handle substrate. This extraction allows the use of a smooth, purpose-built surface for high-precision cavity formation, while the light detection substrate is reserved for its optimal function of detecting light, reducing overall system complexity despite the additional substrate.
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 results in a highly reliable spectroscopic sensor by stabilizing the cavity layer formation and preventing substrate damage, enhancing the overall manufacturing process.
Implementation Method 1
the handle substrate may be removed from the cavity layer by selectively removing the surface layer
Data Source
AI summary
A method of manufacturing a spectroscopic sensor 1 comprises a first step of forming a cavity layer 21 by nanoimprinting on a handle substrate; a second step of forming a first mirror layer 22 on the cavity layer 21 after the first step; a third step of joining a light-transmitting substrate 3 onto the first mirror layer 22 after the second step; a fourth step of removing the handle substrate from the cavity layer 21 after the third step; a fifth step of forming a second mirror layer 23 on the cavity layer 21 without the handle substrate after the fourth step; and a sixth step of joining the light detection substrate 4 onto the second mirror layer 23 after the fifth step.