JP2018172278A - 耐破壊性を有する多層基体、および耐破壊性を有する多層基体を含む物品 - Google Patents
耐破壊性を有する多層基体、および耐破壊性を有する多層基体を含む物品 Download PDFInfo
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Abstract
Description
本明細書に別様で記載されたように、基体100は、物品および/または装置において、ハウジング基体またはカバー基体として用いられ得る(例えば、ディスプレイ)。ディスプレイにおいて用いられる場合には、基体100はタッチモジュールの一部を構成し得る。物品および/または装置においてハウジング基体として用いられる基体100は、ハウジングの側面、後面、および/または前面の少なくとも一部を構成し得る。
CT=(CS・DOL)/(t−2DOL)…(1)
式中、tは、ガラス物品の厚さであり、マイクロメートル(μm)で表される。本開示の様々なセクションにおいて、中心張力CTおよび圧縮応力CSは、本明細書においてはメガパスカル(MPa)で表され、厚さtはマイクロメートル(μm)またはミリメートル(mm)で表され、層の深さDOLはマイクロメートル(μm)で表される。DOCが用いられる場合には、これもマイクロメートル(μm)で表され得る。
CS(da)≒CSs−da(ma’)…(7)
一部の実施形態では、深さdaは約3μm〜約8μmの範囲内(即ち、3μm≦da≦8μm)である。別の実施形態では3μm≦da≦10μmである。更に他の実施形態では3μm≦da≦12μmである。
本明細書に記載される層200の実施形態は、基体100および/または多層基体10に、耐スクラッチ性、耐破壊性、または耐損傷性を付与するために用いられ得る。任意に、層200は、基体100および/または多層基体10の光学特性を改善するために用いられ得る。層200のこれらの属性は、組み合わせて用いられ得る。従って、層200は、本明細書においては“耐スクラッチ”層、“耐破壊”層、またはより一般的に“耐損傷”層と称され得る。層200は連続層または不連続層であり得る。
1以上の実施形態において、多層基体10は、バーコビッチ圧子硬さ試験によって、約50nm以上または約100nm以上(例えば、約100nm〜約300nm、約100nm〜約400nm、約100nm〜約500nm、約100nm〜約600nm、約200nm〜約300nm、約200nm〜約400nm、約200nm〜約500nm、または約200nm〜約600nm)の押し込み深さに沿って測定された、約8GPaより高い硬さを有する。1以上の実施形態では、多層基体10は、上記の押し込み深さに沿って、約16GPa以上、約17GPa以上、約18GPa以上、約19GPa以上、約20GPa以上、約22GPa以上の硬さを有する。1以上の特定の実施形態では、多層基体10は、バーコビッチ圧子硬さ試験によって、約50nm以上または約100nm以上(例えば、約100nm〜約300nm、約100nm〜約400nm、約100nm〜約500nm、約100nm〜約600nm、約200nm〜約300nm、約200nm〜約400nm、約200nm〜約500nm、または約200nm〜約600nm)の押し込み深さに沿って測定された、約15GPa〜約25GPa、約16GPa〜約25GPa、約18GPa〜約25GPa、約20GPa〜約25GPa、約22GPa〜約25GPa、約23GPa〜約25GPaの範囲内、並びに、それらの間の全範囲および部分的な範囲内の測定された硬さを示し得る。幾つかの事例では、多層基体10の硬さは、層200の存在に起因して、下にある基体100の硬さより高い。
表1に示されるように、実施例AおよびB、並びに比較例CおよびDを調製した。実施例Aに従って、1mmの厚さと、110mmの長さと、56mmの幅とを各々が有する5個の強化されたガラス基体を設けることにより、5個のサンプルを作製した。このガラス基体はアルミノボロシリケートガラスを含み、このアルミノボロシリケートガラスは、少なくとも約50モル%のSiO2、約12モル%〜約22モル%のAl2O3、約4.5モル%〜約10モル%のB2O3、約10モル%〜約20モル%のNa2O、0モル%〜約5モル%のK2O、少なくとも約0.1モル%のMgO、ZnO、またはそれらの組合せを含み、0モル%≦MgO≦6および0≦ZnO≦6モル%である組成を有した。約350℃〜450℃の温度範囲内に加熱された溶融硝酸カリウム(KNO3)槽にガラス基体を3〜8時間にわたって浸漬するイオン交換プロセスを用いて、これらのガラス基体を、少なくとも約700MPaのCSおよび少なくとも約40μmのDOLを示すよう強化した。DCマグネトロンシステムを用いたイオンアシストDCスパッタリング法によって、各ガラス基体の片側にSi3N4層を堆積させた。この層は、約0.5mTorrの圧力で、約109.6℃の温度で、約60sccmの流量で流されたアルゴンの存在下で、2.1kWのDC電力を供給して、ターゲットからスパッタリングされた。イオンビームは、0.2kWの電力で、100sccmの窒素を用いて発生させた。実施例Aのサンプル上に得られたSi3N4層は、約2μmの厚さを有した。
実施例Eを9個のサンプルとして調製し、そのうち8個を、以下に示すように、バークレー社(Berkeley)の砂およびSiC粒子を用いて摩耗させた。1mmの厚さと、50mmの長さと、50mmの幅とを各々が有する9個の強化されたガラス基体を設けることにより、これらの9個のサンプルを調製した。用いられたガラス基体は、実施例1と同じ組成を有し、実施例1のガラス基体と同様の方法で強化され、同じCSおよびDOLを示した。DCマグネトロンシステムを用いたDCスパッタリングプロセスによって、各ガラス基体の片側にSi3N4層を形成した。この層は、約6.9×10−4Torrの圧力で、約75sccmの流量で流されたアルゴンの存在下で、4kWのDC電力を供給して、ターゲットからスパッタリングされた。イオンビームは、0.310kWの電力で、115sccmで流された窒素の存在下で発生させた。堆積速度は1.4Å/秒であり、合計堆積時間は230分とした。得られたSi3N4層は約2μmの厚さを有した。
本明細書において開示される多層基体の改善された耐スクラッチ性を、むき出しの基体と比較してより浅いスクラッチ深さおよびより狭いスクラッチ幅を示すことに関して示すために、実施例Fおよび比較例Gのそれぞれにつき3個のサンプルを調製した。
本明細書において開示される多層基体の改善された耐スクラッチ性を、むき出しの基体と比較してより浅いスクラッチ深さおよびより狭いスクラッチ幅を示すことに関して示すために、実施例Hおよび比較例Iに従った4個のサンプルを調製した。
本明細書において開示される多層基体の改善された機械的特性(例えば、スクラッチ深さ減少)および関連付けられた光学特性(例えば、無色の透過色および/または反射色)を示すために、実施例JおよびKを調製した。結果を表5および表6に示す。
携帯電話に組み付けた際の様々な基体および多層基体の耐破壊性を決定するために、143個のサンプルの携帯電話を調製した。表7は、各サンプルの属性を記載している。
Claims (9)
- 外側に面した表面を含む基体であって、非晶質の基体および結晶質の基体から選択される透明または不透明の基体を含む、基体と、
前記外側に面した表面の上に配設された、AlOxNyを含む層と、
前記層の上または前記層と前記基体との間に配設された、SiO2およびAl2O3のうちの一方を含む付加層と、
を備えた多層基体であって、
前記多層基体が、バーコビッチ圧子硬度試験によって、100nm以上の押し込み深さに沿って測定された、少なくとも12GPaの硬さを示し、
装置に組み付けられた前記多層基体は、前記装置を少なくとも100cmの高さからアスファルトの落下面上に落下させた際に、破壊に耐えることができる
ことを特徴とする多層基体。 - 前記基体が、ガラスから選択される非晶質の基体、単結晶構造およびガラスセラミックから選択される結晶質の基体、またはそれらの組合せを含む、請求項1記載の多層基体。
- 前記非晶質の基体が、ソーダ石灰ガラス、アルカリアルミノシリケートガラス、アルカリ含有ボロシリケートガラス、およびアルカリアルミノボロシリケートガラスからなる群より選択されるガラスを含む、請求項2記載の多層基体。
- 前記ガラスが化学的に強化されており、前記化学的に強化されたガラスの表面から、少なくとも10μmの層の深さ(DOL)まで、前記化学的に強化されたガラスの内部に延在する少なくとも250MPaの圧縮応力(CS)を有する圧縮応力(CS)層を含む、請求項3記載の多層基体。
- 前記基体が、両側にある主表面のうち1以上の表面において、0.5%以上の平均破断ひずみを示す、請求項1から4いずれか1項記載の多層基体。
- 前記層が、バーコビッチ圧子硬さ試験によって、100nm以上の押し込み深さに沿って測定された、少なくとも20GPaの硬さを示す、請求項1〜5のいずれか一項記載の多層基体。
- 前記層が、金属酸化物、金属窒化物、金属酸窒化物、金属炭化物、金属ホウ化物、ダイヤモンドライクカーボン、またはそれらの組合せを含み、前記金属がB、Al、Si、Ti、V、Cr、Y、Zr、Nb、Mo、Sn、Hf、Ta、およびWからなる群より選択される、請求項1〜6のいずれか一項記載の多層基体。
- 前記多層基体が、少なくとも85%、または10%未満の透過率を示す、請求項1〜7のいずれか一項記載の多層基体。
- 前記SiO2およびAl2O3のうちの他方を含む第2の付加層を更に備えた、請求項1〜8のいずれか一項記載の多層基体。
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Also Published As
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| WO2015038843A1 (en) | 2015-03-19 |
| CN114195402A (zh) | 2022-03-18 |
| KR20160056924A (ko) | 2016-05-20 |
| TWI740247B (zh) | 2021-09-21 |
| KR102227298B1 (ko) | 2021-03-15 |
| EP4246949A3 (en) | 2023-11-08 |
| JP6371396B2 (ja) | 2018-08-08 |
| TW202026146A (zh) | 2020-07-16 |
| TW201515850A (zh) | 2015-05-01 |
| JP6815356B2 (ja) | 2021-01-20 |
| CN105980323A (zh) | 2016-09-28 |
| EP3044177B1 (en) | 2023-08-23 |
| TWI678286B (zh) | 2019-12-01 |
| US20150079398A1 (en) | 2015-03-19 |
| EP4246949A2 (en) | 2023-09-20 |
| EP3044177A1 (en) | 2016-07-20 |
| US10160688B2 (en) | 2018-12-25 |
| JP2016533316A (ja) | 2016-10-27 |
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