UV Sensor Resin Sealing Spectral Filtering
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Solution Overview
Problem
Conventional ultraviolet sensors face challenges with high production complexity, increased costs, and decreased productivity due to the use of semiconductor processes and expensive, brittle materials like sapphire and quartz, which complicate detection and make low-cost manufacturing difficult.
Innovation Solution
An optical sensor device is designed with a resin sealing portion that includes two light receiving portions with different transmission spectral characteristics, allowing for the detection of ultraviolet light without complex structures or expensive components, using transparent resins with specific transmittance properties to differentiate spectral sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If semiconductor processes and expensive materials like sapphire and quartz are used, then detection reliability is improved, but manufacturing cost increases and productivity decreases
Solution Approach 1:
The patent replaces expensive, difficult-to-process materials like sapphire and quartz with inexpensive resin materials for the sealing portion. This substitution dramatically reduces manufacturing cost and simplifies production processes while maintaining adequate detection functionality, directly addressing the contradiction between reliability and productivity.
Solution Approach 2:
The patent modifies the transmission spectral characteristics of the sealing portion by selecting resins with appropriate UV transmission properties. This allows the sealing portion to function as both a protective enclosure and an optical filter, eliminating the need for separate expensive optical materials while achieving reliable UV detection.
2Measurement precision
If semiconductor processes are used to create light receiving portions with different impurity doping depths, then spectral sensitivity is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent introduces the sealing portion as an intermediary optical element that performs spectral filtering. Instead of achieving spectral differentiation through complex semiconductor doping processes, the sealing portion made from resins with different UV transmission characteristics acts as a mediator to provide the necessary spectral selectivity, greatly simplifying the device structure and manufacturing.
3Reliability
If metal casings with light shielding properties are used, then ultraviolet light detection is improved, but material cost and processing difficulty increase
Solution Approach 1:
The patent changes the material parameter of the sealing portion from metal to resin, fundamentally altering both the manufacturing ease and optical properties. Resin materials are much easier to process and form than metal casings, while their UV transmission characteristics can be tailored to enable detection, simultaneously improving ease of manufacture and maintaining detection reliability.
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 solution enables the production of an optical sensor device that can efficiently detect ultraviolet light with high productivity and at a low cost, reducing the complexity and expense associated with traditional semiconductor processes and materials.
Implementation Method 1
at least one of the first sealing portion and the second sealing portion being configured to transmit at least part of an ultraviolet light wavelength band
Implementation Method 2
the first sealing portion having a transmission spectral characteristic in which a first wavelength is set as a lower limit value of a transmission wavelength band, the second sealing portion having a transmission spectral characteristic in which a second wavelength different from the first wavelength is set as a lower limit value of a transmission wavelength band
Implementation Method 3
a first light receiving portion having sensitivity to ultraviolet light, a second light receiving portion having sensitivity to ultraviolet light
Data Source
AI summary
This optical sensor device includes a first light receiving portion having sensitivity to ultraviolet light, a first sealing portion covering the first light receiving portion, a second light receiving portion having sensitivity to ultraviolet light, and a second sealing portion which covers the second light receiving portion. At least one of the first sealing portion and the second sealing portion is configured to transmit at least part of a ultraviolet light wavelength band, the first sealing portion is formed from one or more resin layers and has transmission spectral characteristics that a first wavelength is set as a lower limit value of a transmission wavelength band, and the second sealing portion is formed from one or more resin layers and has transmission spectral characteristics that a second wavelength different from the first wavelength is set as a lower limit value of the transmission wavelength band.