Enclosures having an improved tactile surface
A casing, surface roughness technology applied in the field of casings with improved tactile surfaces, which can solve the problems of weight user dissatisfaction, damage to internal components of portable electronic devices, etc.
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Embodiment 1
[0090] The nominal composition of the alkali aluminosilicate glass substrate (in sheet form and unstrengthened) is 57.5 mol % SiO 2 , 16.5 mol% Al 2 o 3 , 16 mol% Na 2 O, 2.8 mol% MgO and 6.5 mol% P 2 o 5 , and having a thickness of 0.7 mm, cleaning was performed by immersing the alkali metal aluminosilicate glass substrate in a detergent solution and applying ultrasonic agitation to the detergent solution. The cleaned substrate is then removed from the detergent solution, followed by applying a solution containing 6 wt% hydrofluoric acid (HF) and 15 wt% 4 Etchant F was statically etched for 8 minutes (step A). The etched substrate is then rinsed and rinsed thoroughly with deionized water. The etched substrates were then immersed in a solution of 5% by weight HF for the durations shown in Table 1 to achieve the desired haze level (Step B). After the second etch step, the glass substrate is cleaned with deionized water to remove acid residue and any etch by-products. Th...
Embodiment 2
[0096] Alkali aluminosilicate glass substrates (in sheet form and unstrengthened) having the same nominal composition and the same thickness as Example 1 were prepared by immersing the substrate in a wash detergent solution and apply ultrasonic agitation to the detergent solution for cleaning. The cleaned substrate is then removed from the detergent solution. Coating a single major surface with a resist film, followed by applying a 4 The etchant of F was statically etched for 8 minutes (step C). The etched substrate is then rinsed and rinsed thoroughly with deionized water. The etched substrates were then immersed in a solution of 5 wt% HF for the durations shown in Table 2 to achieve the desired haze level (step D). After the second etching step, the glass substrate was cleaned with deionized water and the acid-resistant film was removed. The resulting Examples 2A-2E included textured surfaces on a single major surface and two minor surfaces. The opposing major surface i...
Embodiment 3
[0106] A glass substrate with the same nominal composition and shape and thickness as Example 1 was sandblasted with SiC particles at 20 psi pressure to create a textured surface exhibiting high transmittance haze and roughness. The substrate was then rinsed with deionized water to remove any debris from the sandblasting. The substrates were then chemically polished (as indicated in Table 4) for different periods of time using a 5 wt% HF solution, followed by rinsing again in deionized water. The resulting Examples 3A-3D included a textured surface on a single major surface. The opposing major surface is free of a textured surface. Transmittance haze and surface roughness (Ra) were measured on the resulting textured surfaces of Examples 3A-3D.
[0107] Table 4: Properties of Examples 3A-3D based on chemical polishing time.
[0108]
[0109] Various modifications and variations can be made in the materials, methods, and articles of manufacture described herein. Other asp...
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Abstract
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