Fluorinated Silicone Optical Member Antifouling
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Solution Overview
Problem
Silicone materials used in optical and electronic components face challenges with poor antifouling properties, leading to stickiness issues, which are addressed by surface treatment with fluorine gas but result in reduced transparency and strength.
Innovation Solution
A silicone material with a fluorinated surface, containing 0.1-45 at% F atoms or a F-to-C ratio of 0.01-1.00, treated with fluorine gas or a mixed gas, maintaining transparency and strength while enhancing antifouling properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If silicone material surface is treated with fluorine gas to reduce stickiness, then antifouling property is improved, but transparency and strength decrease
Solution Approach 1:
The patent applies parameter changes by precisely controlling the fluorine atom concentration (0.1-45 at%) and F-to-C ratio (0.01-1.00) on the silicone material surface. This optimized parameter range achieves the desired antifouling property while preventing excessive fluorination that would cause transparency loss and strength reduction. The specific parameter thresholds were determined to balance multiple performance requirements.
Solution Approach 2:
The patent creates a composite surface structure by combining fluorinated regions with non-fluorinated regions on the silicone material surface. This composite approach allows the fluorinated portions to provide antifouling properties while the non-fluorinated portions maintain the original transparency and strength characteristics of the silicone material, thus resolving the contradiction between improved antifouling and maintained mechanical/optical properties.
2Reliability
If silicone material surface is treated with fluorine gas to reduce stickiness, then antifouling property is improved, but transparency decreases
Solution Approach 1:
The patent resolves the transparency-antifouling contradiction by establishing specific parameter thresholds: fluorine atom concentration of 0.1-45 at% and F-to-C ratio of 0.01-1.00. These controlled parameters ensure sufficient fluorination for antifouling performance while preventing excessive fluorine deposition that would scatter light and reduce transparency. The lower limits ensure antifouling effectiveness, while the upper limits preserve optical clarity.
Solution Approach 2:
The patent implements local quality by creating a fluorinated surface layer with specific composition characteristics that differ from the bulk material. The fluorinated surface layer (with controlled F atom concentration) provides antifouling properties locally, while the underlying non-fluorinated silicone material maintains its inherent transparency. This spatial differentiation of properties allows simultaneous achievement of both antifouling and transparency requirements.
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 achieves excellent antifouling properties while maintaining good light transmittance and heat resistance, suitable for optical semiconductor devices and illumination apparatuses.
Implementation Method 1
a known method for reducing stickiness of the surface of silicone materials is to treat the surface thereof with fluorine gas
Implementation Method 2
the proportion of F atoms being from 0.1 to 45 at % and/or the ratio of F atoms relative to C atoms being from 0.01 to 1.00 in the atomic composition percentage according to X-ray photoelectron spectroscopy (XPS)
Data Source
AI summary
The present invention provides an optical member comprising a silicone material having excellent antifouling property while having good light transmittance, heat resistance, and strength, and an optical semiconductor device and illumination apparatus having excellent antifouling property. The present invention is an optical member comprising a silicone material containing a fluorinated surface, the proportion of F atoms being from 0.1 to 45 at % and/or the ratio of F atoms relative to C atoms being from 0.01 to 1.00 in the atomic composition percentage according to X-ray photoelectron spectroscopy (XPS) of the fluorinated surface.