Perovskite Intraoral Sensor Sealing for Moisture Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing intraoral sensors experience performance degradation due to moisture penetration, despite the use of sealing structures that do not provide sufficient moisture prevention.
Innovation Solution
An intraoral sensor design featuring a perovskite-based photoconductive layer, a dual-case structure with metal layers, a protective sleeve, and a desiccant-filled internal space to prevent moisture ingress, using a sealing material to seal the cases and a porous desiccant to maintain a moisture-free environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealing structure is applied to prevent moisture penetration, then moisture prevention capability is improved, but the existing sealing structure does not provide sufficient moisture prevention characteristics
Solution Approach 1:
The patent employs a composite sealing structure combining multiple materials with different properties: a first sealing material (e.g., resin or rubber) applied to the front surface of the photoconductive layer, and a second sealing material (e.g., metal seal or welded seal) applied to the rear surface. This multi-material approach creates synergistic moisture barrier effects that overcome the limitations of single-material sealing structures.
Solution Approach 2:
The sealing structure extends into the third dimension by applying sealing materials to both the front and rear surfaces of the photoconductive layer, creating a sandwich-like sealing configuration. This multi-layered approach in the thickness dimension provides redundant moisture barrier paths, ensuring that moisture must penetrate through multiple sealed interfaces rather than a single plane.
2Reliability
If the photoconductive layer is exposed to moisture, then performance degradation occurs, but complete sealing increases device complexity
Solution Approach 1:
The sealing structure is segmented into distinct functional zones: front surface sealing, rear surface sealing, and edge sealing. Each segment addresses specific moisture ingress pathways independently. The front seal protects the light-receiving surface, the rear seal protects the electrode and connection areas, and the edge seal seals the peripheral gaps, creating a distributed sealing system that is more manageable and less complex than a monolithic seal.
Solution Approach 2:
Different sealing materials and methods are applied to different regions of the photoconductive layer based on local requirements. The front surface uses materials compatible with light transmission and sensor operation, while the rear surface uses materials optimized for electrical insulation and structural support. This localized approach allows each sealing region to be optimized for its specific function without compromising the entire device.
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
The design effectively prevents moisture penetration, enhancing the sensor's performance and yield rate by maintaining a moisture-free environment around the photoconductive layer.
Implementation Method 1
a desiccant filling an internal space of the case in a state in which the detector module is accommodated in the case
Implementation Method 2
a sensor assembly in which a photoconductive layer formed of perovskite is formed
Data Source
AI summary
Proposed is an Intraoral sensor. The Intraoral sensor includes a detector module including a sensor assembly in which a photoconductive layer formed of perovskite is formed, a case providing a space in which the detector module is positioned and including at least one metal layer, and a desiccant filling an internal space of the case in a state in which the detector module is accommodated in the case.