P‐60: High Edge Strength Glass for Mobile Devices

Ikeda, Hikaru; Kinoshita, Kiyotaka; Fukada, Mutumu; Kawamoto, Koji; Murata, Takashi; Choju, Ken; Ohji, Masahiko; Yamazaki, Hiroki

doi:10.1002/sdtp.10127

Cited by 3 publications

(2 citation statements)

References 3 publications

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“…In this test, the glass edge was impacted by the pendulum arm tip swinging from increasing heights, and the height for breakage was evaluated. The test condition is the same as our previous report . Average breaking heights are shown Fig.…”

Section: Resultsmentioning

confidence: 97%

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Novel process for cover glass with ideal stress distribution

2016

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This paper proposes a new process to manufacture cover glass which overcomes a strength trade-off between the face and the edge. In the process, alkali-barrier films are deposited on glass faces before an ion-exchange process in order to control face stress properties without inhibiting the edge strengthening. As a demonstration of the process, alkali-alumino-silicate glass sheets with SiO 2 films were chemically strengthened, and their stress properties and strengths were investigated. As a result, thicker SiO 2 films cause lower face DOL (Depth Of strengthened Layer), and it is observed that the faces have lower DOL than the edges. In strength tests corresponding to major fracture modes of smartphone cover glass, specimens with 80-100 nm films have more balanced face performance and better edge impact strengths than the no-film specimen.

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Section: Resultsmentioning

confidence: 97%

“…Edge fracture originates from (c) bending or (d) impact . To prevent mode (c), it is effective to increase CS.…”

Section: Introductionmentioning

confidence: 99%

Novel process for cover glass with ideal stress distribution

2016

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P-53: Novel Process for Cover Glass with Ideal Stress Distribution

Fukada

Kinoshita

Kajioka

2016

SID Symposium Digest of Technical Papers

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This paper proposes a new process to manufacture cover glass which overcomes a strength trade‐off between the face and the edge. In the process, alkali‐barrier films are deposited on glass faces before an ion‐exchange process in order to control face stress properties without inhibiting the edge strengthening. As a demonstration of the process, alkali‐alumino‐silicate glass sheets with SiO2 films were chemically strengthened, and their stress properties and strengths were investigated. As a result, thicker SiO2 films cause lower face DOL (Depth Of strengthened Layer), and it is observed that the faces have lower DOL than the edges. In strength tests corresponding to major fracture modes of smartphone cover glass, specimens with 80‐100 nm films have more balanced face performance and better edge impact strengths than the no‐film specimen.

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Predicting the flexural strength of chemically strengthened aluminosilicate glass plates with fractography

Sun

Dugnani

2022

Journal of the European Ceramic Society

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P‐60: High Edge Strength Glass for Mobile Devices

Cited by 3 publications

References 3 publications

Novel process for cover glass with ideal stress distribution

Novel process for cover glass with ideal stress distribution

P-53: Novel Process for Cover Glass with Ideal Stress Distribution

Predicting the flexural strength of chemically strengthened aluminosilicate glass plates with fractography

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