Frequently Asked Questions (FAQ)

Yes, you can technically apply a Paperlike matte film over an existing tempered glass screen protector, but the user experience is highly compromised. Doing so creates a double-layer substrate that severely reduces visible light transmittance, introduces heavy display pixel distortion (rainbow effects), and degrades touch sensitivity or Apple Pencil tracking precision due to the increased structural thickness.

To eliminate this engineering conflict, Linno has developed a professional Paperlike Tempered Glass Screen Protector. This premium solution integrates the tactile paper-feel friction directly onto a high-aluminum tempered glass substrate via advanced chemical surface etching. By merging the handwriting texture of paper with the 9H hardness protection of glass into a single layer, it provides optimal display clarity, precise touch latency, and eliminates the need for stacking multiple films.

We utilize multi-axis high-speed CNC diamond milling cutters to maintain structural dimensional tolerances within an ultra-strict limit of 0.02mm. Following the initial cutting and polishing, all protectors undergo a proprietary secondary chemical tempering process (Double Strengthening) specifically targeted at repairing micro-fractures along the milled edges. This drastically reduces the structural stress concentration zones, ensuring that the 2.5D polished curved borders can easily withstand a standard 30G solid steel ball drop test from a height of 1.5M directly onto the screen surface without cracking.

Linno offers robust OEM/ODM capabilities for specialized functional protectors. Our Privacy (Anti-Spy) protectors utilize ultra-fine micro-louver optical technology to restrict the viewing angle strictly to  27-30  degree completely blacking out the screen from side view. Our Anti-Blue Light series incorporates nano-absorptive layers filtering up to 45% of harmful high-energy visible (HEV) blue light 320nm - 550nm while preserving a visible light transmittance up to 93% in 320nm - 380nm , Additionally, our Matte (Anti-Glare) lines utilize precise chemical etching to control surface haze within 0.3 Hz.delivering a smooth paper-like touch with zero pixel distortion.

Our screen protectors feature a dual-layer AB glue structure composite from industry-leading Japanese suppliers (such as Toyo or Nippa). The optical-grade PET substrate is coated with a high-viscosity silicone adhesive ranging from 0.01-0.35 mm depending on the curved screen specifications (2.5D or 3D). This specific formulation guarantees electrostatic auto-absorption, driving out air in less than 5 seconds for a completely bubble-free installation while preventing edge-lifting or adhesive residue over extended device lifetimes.

We implement advanced Vacuum Anti-Fingerprint (AF) Evaporation technology, utilizing premium Daikin (Japan) fluorosilane materials evaporated in a cleanroom chamber. The initial water contact angle reaches 115 degree  and the oil contact angle reaches 110 degree , ensuring excellent smooth touch and smudge resistance. To verify long-term durability for premium OEM orders, the coating must pass a rigorous steel wool abrasion test  1kg load,  friction head for 5,000 times cycles, maintaining a water contact angle 105 degree post-test.

Linno strictly utilizes high-aluminum silicon glass substrates imported from world-class manufacturers, including Corning Gorilla Glass, Asahi Glass (AGC), and Schott. Compared to standard soda-lime glass, our high-alumina glass features a significantly higher base density, enabling a uniform depth of layer and surface compressive stress 800MPa after critical chemical potassium salt immersion. This provides a 3 times increase in edge-chipping resistance and impact drop protection for high-end smartphones.

Our standard production MOQ for custom touch panel glass is 1,000 pieces per design. However, flexible volume structures are available to support initial engineering validation tests (EVT) and low-volume, high-mix industrial projects. Upon mechanical blueprint approval, custom prototype samples are delivered within 7 to 10 working days. Full mass-production orders are manufactured, quality-inspected, and shipped within 2 to 3 weeks.

All critical cleaning, printing, and coating processes are performed inside strictly monitored ISO Class 5 (Class 100) and Class 6 dust-free cleanrooms to eliminate particle inclusion. We utilize automated optical inspection (AOI) systems alongside surface stress meters (FSM-6000LE) to inspect 100% of the outgoing batch. Cosmetic quality aligns directly with MIL-G-174B scratch-and-dig standards, ensuring zero micro-scratches, pinholes, or edge chips.

Yes. Utilizing specialized CO2/UV laser cutting equipment and multi-axis CNC machines, we process ultra-thin glass substrates ranging from 0.33 mm to 3.0 mm. Our custom processing capabilities include complex 2.5D stepped edges, polished irregular bevels, precision internal slotting, and micro-hole drilling. These processes are ideal for specialized automotive dashboards, marine navigation displays, and medical touch screens.

• We offer specialized vacuum and chemical surface treatments, including Anti-Glare (AG), Anti-Reflective (AR), and Anti-Fingerprint (AF/Oleophobic) coatings. Our etched AG process controls gloss levels dynamically between 35 and 95 GU, reducing specular reflections under harsh industrial ambient light while maintaining optical clarity. The deposited AR coatings secure a total visible light transmittance ≥ 94% and pass rigorous durability testing, including steel wool abrasion evaluations under a 1kg load for over 5,000 continuous cycles.

Linno specializes in precision-engineered touch panel glass utilizing high-quality substrates like Corning Gorilla, Asahi Glass (AGC), and CSG. For industrial and medical control displays, we achieve surface compressive stress (CS) ; 750 MPa and depth of layer (DoL) ; 400 through advanced chemical tempering. Mechanical dimensional tolerances are strictly controlled within ± 0.05 mm via high-precision CNC diamond grinding tools, ensuring seamless integration with capacitive touch sensor modules.