An ultrathin glass, an ultrathin glass with unequal thickness, and a preparation method and use thereof

By designing an ultra-thin glass structure with unequal thickness and chemical strengthening treatment, the stress distribution was optimized, the warping and deformation problems were solved, and the optical, impact resistance and drop resistance properties of the glass were improved.

CN122403784APending Publication Date: 2026-07-17CHONGQING AUREAVIA HI TECH GLASS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHONGQING AUREAVIA HI TECH GLASS CO LTD
Filing Date
2026-05-06
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

The uneven distribution of stress center values ​​in existing ultra-thin glass with unequal thickness after chemical strengthening leads to warping and deformation, affecting the flatness and impact resistance of the cover plate.

Method used

The design incorporates ultra-thin glass structures with varying thicknesses, including bent regions, non-bent regions, and buffer zones. Through chemical etching and chemical strengthening processes, stress distribution is optimized to meet specific composition and thickness ratios, thereby controlling warpage and compressive stress.

Benefits of technology

It improves the optical performance, impact resistance and drop resistance of ultra-thin glass with unequal thickness, warpage ≤0.2mm, impact height of coated pen drop ≥200mm, surface compressive stress >700Mpa, and compressive stress layer depth >6µm.

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Abstract

This application provides an ultrathin glass, an unequal-thickness ultrathin glass, its preparation method, and its uses. The unequal-thickness ultrathin glass of this application includes a bending region, a non-bending region, and a buffer zone; the buffer zone is symmetrically distributed on both sides of the bending region, and the non-bending regions are located on the side of the buffer zone away from the bending region, wherein the thickness of the non-bending region is greater than the thickness of the bending region; the thickness of the non-bending region is 0.1~0.35mm; the warpage of the unequal-thickness ultrathin glass is ≤0.2mm; the coating impact height of the unequal-thickness ultrathin glass is ≥200mm; the composition of the unequal-thickness ultrathin glass, by mass percentage of oxides, includes: 57wt%~61.5wt% SiO2, 17wt%~19wt% Al2O3, 0~1wt% CaO, 0~2wt% Li2O, 15.8wt%~19wt% Na2O, 0.5wt%~3wt% K2O, 1wt%~4wt% MgO, 0.5wt%~3wt% ZrO2, and 0~1wt% B2O3. The ultrathin glass and unequal-thickness ultrathin glass of this application have excellent optical properties, impact resistance, bending properties and drop resistance.
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