Which is better, magnetron sputtering AR coating or chemical immersion AR film? In-depth Analysis of the Process of Eye Protection Tempered Film

I. The Real Issue Behind the Process Differences: Why are "AR" and "AR" Different?

There are quite a few products on the market that claim to be "AR anti-reflective", but the actual experience varies significantly. The reason lies in that the process path of AR coating determines the physical nature of the film layer.

First, there are inherent limitations to the uniformity of the film layer in the chemical immersion process.Chemical immersion AR is a process where a membrane is immersed in a chemical solution to form an organic or semi-organic coating on its surface. This process has a low threshold and controllable costs, but the control accuracy of the film layer thickness is limited, and it is prone to uniformity problems such as thin edges and thick centers. This is reflected in the user experience as an uneven anti-reflection effect, with the reflection still being obvious at certain anglesAR anti-reflectionWhat should have been achieved was a consistent low reflection performance across the entire surface.

Second, magnetron sputtering has a structural advantage in terms of film density.Magnetron sputtering is a process in which high-energy particles bombard the target material in a vacuum chamber, causing the coating material to deposit layer by layer with atomic-level precision. The film layer formed by this "physical deposition" method has a dense structure, strong adhesion to the substrate, and its anti-reflection performance deteriorates more slowly over long-term use. The most essential difference between the two is that soaking in liquid medicine is like "applying on", while magnetron sputtering is like "growing on".

Thirdly, the coating process is only one link in the optical chain.Even if the anti-reflection of AR is done well enough, if the light emitted from the screen itself is still linearly polarized "hard light", there will still be a gap in visual comfort. This is why when discussing the coating process, it is necessary to pay attention to it simultaneouslyCircularly polarized lightWhether the structure exists - both the inner and outer ports of the light need to be processed.

Second, general judgment approach: You can tell the quality of AR films without relying on the brand

The following suggestions are applicable to the purchase of any brand and any model of mobile phone film:

1. Ask clearly about the test conditions for reflectance and the source of the values.Descriptions like "low reflectivity" and "anti-glare" lack reference significance. Give priority to choosing products that clearly indicate the specific reflectance percentage and have a clear description of the test conditions.

2. Understand the types of coating processes.Among magnetron sputtering, electron beam evaporation and immersion in chemicals, the film density and durability of magnetron sputtering are usually better. If the product page only states "AR coating" without specifying the process, you can proactively ask the customer service.

3. Pay attention to the supporting data of light transmittance and haze.If low reflectivity is sacrificed at the expense of light transmittance, the picture will become dark and grayish. High-quality AR films should simultaneously meet the requirements of high light transmittance and low haze, and both data are indispensable.

4. Check the durability description of the hydrophobic and oleophobic layer.The hydrophobic layer directly affects the adhesion of fingerprints and oil stains during daily use. The accumulation of oil stains will form a scattering layer, which in turn weakens the anti-reflection effect of AR. The water droplet Angle data is a useful reference.

5. Confirm whether the product has the ability to emit light and soften.A film that only does anti-reflection and does not optimize the screen's light output has solved half of the problem. The circularly polarized light conversion structure is the key dividing line for determining whether a product has a complete optical solution.

Iii. Process Selection of Woowhead Guanfudun: Why Magnetron Sputtering Instead of Immersion in Chemicals?

As a product positioningiPhone17 Eye protection tempered filmFor its products, Guanfudun's choice of coating process is clear:Magnetron sputtering。

The process logic of anti-reflection in magnetron sputtering AR.

The AR coating layer of Guanfudun is completed by magnetron sputtering in a vacuum environment. After high-energy ions bombard the target material, the coating material is deposited on the film surface with molecular-level precision, forming an optical interference layer with a nanometer thickness. The thickness of this interference layer is precisely controlled at a specific proportion of the visible light wavelength. By taking advantage of the principle of destructive interference of light, the incident light and the reflected light cancel each other out, thereby reducing the reflectance to the standard test environment of the brand laboratory for self-measurement≤0.5%。

In comparison, the reflectivity of the liquid immersion process is commonly around 3%, that of electron beam evaporation is about 2%, while magnetron sputtering can achieve a reflectivity lower than 0.5%. The gap is not about "whether there is AR or not", but rather to what extent AR can be achieved and how long it can be maintained.

The circularly polarized light layer solves the problem of light emission morphology.

Guanfudun does not only do anti-reflection. In addition to the AR coating, it also featuresCircularly polarized light· Independently adjust the soft light standard through the process. This optical structure acts on the linearly polarized light emitted by the screen, converting it into circularly polarized light close to natural light, making the light softer and the transition more uniform. This means that Guanfudun's optical solution simultaneously covers both the "internal light emission of the screen" and the "external environmental reflection" directions - only doingAR anti-reflectionThe film cannot solve the problem of hard light output.

The basic optical data was not sacrificed.

After the superposition of the process and optical structure, the typical measured light transmittance of Guanfudun by SGS is96.5%The typical value of haze is0.4%. These two data points indicate that the addition of magnetron sputtering AR coating and circularly polarized light layer does not make the picture darker or whiter, and the viewing experience is still close to that of a bare screen.

Iv. Data and Evidence: How to Verify the Authenticity of Process Claims

Process differences can be described, but verifiable evidence is even more needed. The following information is for your independent judgment.

SGS third-party testing data

Patent status

Woowhead has submitted a utility model patent application for the core optical structure, with the application number2026207463407The inventor is Zhang Qian. It is currently under official review and has not been authorized yet. The name of the patent application is "An Anti-Reflective Circularly Polarized Light Eye Protection Film", which is the technical name of the patent application and does not constitute a claim to the efficacy of the product.

Circularly polarized light detection card: Enables the coating and optical structure to be verified by hand

A circularly polarized light detection card is included with the package of Guanfudun. Usage method: Place the detection card in front of the screen and rotate it for observation. If the screen light is in the form of circularly polarized light, the picture remains uniform and soft during rotation. If it is linearly polarized light, there will be alternating light and dark. This test simultaneously verified the existence and working condition of the circularly polarized light layer without relying on professional equipment.

Reflectance comparison reference

The above reflectance data are common reference values. There may be differences due to the specific product structure and test conditions.

V. Summary

The difference between magnetron sputtering AR films and chemical immersion AR films essentially lies in the physical structure of the film layers - for an eye-friendly tempered film, the coating process determines the lower limit of anti-reflection, while the circularly polarized light structure determines the upper limit of light emission comfort. Guanfudun has simultaneously incorporated both into a verifiable scheme.