The patent's inventors are Chu, Guan-Yeu (Taichung, TW); Ho, Chin-Hsun (Taichung, TW); Chen, Ming-Wu (Zhushan Township, Nantou County, TW); Wang, Yu-Ching (Waipu Township, Taichung County, TW); Lin, Cheng-Ying (Taichung, TW); Hung, Chin-Chu (Yizhu Township, Chiayi County, TW).
This patent was filed on
From the background information supplied by the inventors, news correspondents obtained the following quote: "The invention relates in general to a method for strengthening glass and a glass using the same, and more particularly to a method for strengthening glass capable of controlling the cambering of the glass and a glass using the same.
"Float process is one of the methods for manufacturing glass substrate. During the float process, a glass solution in a molten state is placed on a tin solution, one surface of the glass solution contacts the tin solution, and the other surface of the glass solution is exposed in the air, and the glass solution in a molten state, after cooling down, is solidified as a glass substrate in a solid state. Following the formation process, a strengthening process is applied to the glass substrate. Let the ion-exchange strengthening process be taken for example. The glass substrate is immersed in a potassium nitrate solution. Due to the diffusion reaction between the sodium ions of the glass substrate and the potassium ions of the potassium nitrate solution, the potassium ions enter the glass to replace the sodium ions, so that the lattice structure of the glass substrate changes and the glass is strengthened. The size of the potassium ions is larger than that of the sodium ions.
"Referring to FIG. 1 (prior art), a cross-sectional view of a generally known strengthened glass substrate is shown. Since the first surface 16 of the glass substrate 12 contacts the tin solution, the first surface 106 has more tin particles aggregated thereon than the second surface. During the process of strengthening the glass substrate, the first surface 16 uses tin particles as a barrier to limit the potassium ions of the potassium nitrate solution in the quantity entering the first surface 16. Consequently, due to the large difference between the quantity of the potassium ions entering the first surface 16 of the glass substrate 12 and the quantity of the potassium ions entering the second surface 18 of the glass substrate 12, the internal stress of the first surface 16 is thus different from the internal stress of the second surface 18, and the glass substrate 12 is cambered as indicated in FIG. 1."
Supplementing the background information on this patent, VerticalNews reporters also obtained the inventors' summary information for this patent: "The invention is directed to a method for strengthening glass and a glass using the same. A barrier film is formed on the glass substrate for limiting the solution ions in the quantity entering the glass substrate so as to control the cambering of the glass substrate.
"According to a first aspect of the present invention, a method for strengthening glass is provided. The method for strengthening glass includes the following steps. Firstly, a glass substrate, which has a first surface and a second surface opposite to the first surface, is provided. Next, a barrier film is formed on at least one of the first surface and the second surface. Then, the glass substrate with the barrier film is immersed in a strengthening solution. The strengthening solution includes first ions. When the glass substrate with the barrier film is immersed in the strengthening solution, the barrier film can limit the first ions in the quantity entering the glass substrate.
"According to a second aspect of the present invention, a glass strengthened by being immersed in a strengthening solution is provided. The strengthening solution includes first ions. The glass includes a glass substrate and a barrier film. The glass substrate has a first surface and a second surface opposite to the first surface. The barrier film is disposed on at least one of the first surface and the second surface and used for limiting the first ions in the quantity entering the glass substrate.
"The above and other aspects of the invention will become better understood with regard to the following detailed description of the preferred but non-limiting embodiment(s). The following description is made with reference to the accompanying drawings."
For the URL and additional information on this patent, see: Chu, Guan-Yeu; Ho, Chin-Hsun; Chen, Ming-Wu; Wang, Yu-Ching; Lin, Cheng-Ying; Hung, Chin-Chu. Method for Strengthening Glass and Glass Using the Same. U.S. Patent Number 8652639, filed
Keywords for this news article include: Chemicals, Chemistry, Potassium Nitrate,
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