Capped Blocking Coating for UV-Resistant Laser Optics
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Optical systems, particularly those using excimer lasers, face degradation issues due to UV light exposure, which affects components like sealing components, leading to operational downtime and reduced longevity.
Innovation Solution
The implementation of a capped blocking coating on optically transmissive substrates, featuring a protective coating on one surface and a blocking coating on the opposite surface, capped with a silicate layer to protect from damage and environmental exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If UV light is used in excimer lasers for photolithography, then improved resolution is achieved, but degradation of system components occurs
Solution Approach 1:
A blocking coating is applied to the optically transmissive substrate to act as an intermediary that absorbs or reflects UV light, preventing it from reaching and degrading sealing components and other system parts while allowing the UV light to pass through for photolithography operations
Solution Approach 2:
The patent modifies the optical properties of the substrate by adding coatings with specific thickness parameters (blocking coating and capping layer) and material properties that change how UV light interacts with the system, blocking harmful wavelengths while maintaining operational functionality
2Productivity
If sealing components are exposed to UV laser light, then operational functionality is maintained, but degradation and operational downtime increase
Solution Approach 1:
The blocking coating serves as a protective intermediary between the UV laser light and sealing components, absorbing or reflecting the harmful radiation before it can reach the seals, thereby preventing degradation and ensuring continuous operation
Solution Approach 2:
The blocking coating and capping layer are applied in advance to the optically transmissive substrate before the sealing components are exposed to UV light, providing preemptive protection that prevents degradation before it occurs
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 solution effectively prevents or reduces degradation of sensitive components by blocking UV light, enhancing the operational longevity of optical systems and reducing maintenance needs.
Implementation Method 1
The blocking coating may protect one or more components of an optical system from UV laser light
Implementation Method 2
Due to the one or both of the reflection or the refraction of the UV light in and around such optics
Implementation Method 3
Due to the one or both of the reflection or the refraction of the UV light in and around such optics
Data Source
AI summary
Methods, systems, and devices are described. A system may include an optically transmissive substrate having a protective coating on a first surface and a blocking coating on a second surface that is opposite the first surface. The protective coating is configured to protect the optically transmissive substrate from at least ultraviolet laser energy, and the blocking coating has a first thickness that is less than about 280 nanometers and is adhered to a subset of the second surface. The system further includes a capping layer covering the blocking coating that is on the subset of the second surface and having a second thickness less than the first thickness of the blocking coating. Additionally, the system includes a sealing component positioned between the capping layer and a structure configured to support the optically transmissive substrate.