TWI288180B - Sputtering target and optical recording medium - Google Patents
Sputtering target and optical recording medium Download PDFInfo
- Publication number
- TWI288180B TWI288180B TW093110820A TW93110820A TWI288180B TW I288180 B TWI288180 B TW I288180B TW 093110820 A TW093110820 A TW 093110820A TW 93110820 A TW93110820 A TW 93110820A TW I288180 B TWI288180 B TW I288180B
- Authority
- TW
- Taiwan
- Prior art keywords
- optical recording
- recording medium
- alloy
- sputtering target
- ppm
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 47
- 238000005477 sputtering target Methods 0.000 title claims abstract description 14
- 239000002245 particle Substances 0.000 claims abstract description 32
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 20
- 239000000956 alloy Substances 0.000 claims abstract description 20
- 239000000203 mixture Substances 0.000 claims abstract description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 23
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 20
- 229910052760 oxygen Inorganic materials 0.000 claims description 20
- 239000001301 oxygen Substances 0.000 claims description 20
- 229910001215 Te alloy Inorganic materials 0.000 claims description 12
- 239000013078 crystal Substances 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 229910052732 germanium Inorganic materials 0.000 claims description 2
- 238000004544 sputter deposition Methods 0.000 abstract description 11
- 239000010409 thin film Substances 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 15
- 239000000843 powder Substances 0.000 description 14
- 229910052737 gold Inorganic materials 0.000 description 5
- 239000010931 gold Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 235000012431 wafers Nutrition 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000007088 Archimedes method Methods 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000003708 ampul Substances 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 229910052733 gallium Inorganic materials 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229910052738 indium Inorganic materials 0.000 description 2
- 229910052745 lead Inorganic materials 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 229910052682 stishovite Inorganic materials 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229910052718 tin Inorganic materials 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- 229910000927 Ge alloy Inorganic materials 0.000 description 1
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- 229910018321 SbTe Inorganic materials 0.000 description 1
- 229910052771 Terbium Inorganic materials 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052735 hafnium Inorganic materials 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- 239000013077 target material Substances 0.000 description 1
- 229910052714 tellurium Inorganic materials 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers
- G11B7/266—Sputtering or spin-coating layers
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/34—Sputtering
- C23C14/3407—Cathode assembly for sputtering apparatus, e.g. Target
- C23C14/3414—Metallurgical or chemical aspects of target preparation, e.g. casting, powder metallurgy
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
- G11B2007/24302—Metals or metalloids
- G11B2007/2431—Metals or metalloids group 13 elements (B, Al, Ga, In)
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
- G11B2007/24302—Metals or metalloids
- G11B2007/24312—Metals or metalloids group 14 elements (e.g. Si, Ge, Sn)
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
- G11B2007/24302—Metals or metalloids
- G11B2007/24314—Metals or metalloids group 15 elements (e.g. Sb, Bi)
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
- G11B2007/24302—Metals or metalloids
- G11B2007/24316—Metals or metalloids group 16 elements (i.e. chalcogenides, Se, Te)
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
- Physical Vapour Deposition (AREA)
- Manufacturing Optical Record Carriers (AREA)
- Thermal Transfer Or Thermal Recording In General (AREA)
Description
1288180 玖、發明說明: 【發明所屬之技術領域】 本發明係關於濺鍍靶以及該靶之製造方法與光記錄媒 體尤其關於在濺鍵時粒子發生量少、可安定地製作品質 佳之薄膜、且可得到不發生記錄位元錯誤之光記錄媒體之 Ge-In-Sb-Te合金濺鍍靶,以及由該合金所構成之光記錄媒 【先前技術】 近來開發出不須磁頭即可記錄、再生之高密度記錄光 碟技術,該技術受到相當多之注目。該光碟分為再生專用 型、寫入一次型、重複寫入型三種,尤以在寫入一次型、 重複寫入型所使用之相變化方式受到注目。 相變化光碟,係利用雷射光照射基板上之記錄薄膜使 之加熱昇溫,使該記錄薄膜結構產生結晶學之相變化(非結 具體而言,係檢測出 結晶)來進行資訊之記錄、再生, 該等相間之光學常數變化所引起之反射率變化以再生資訊 上述相變化以點徑會聚成1 進行之。在此,當lvm之雷朝 1〜數/zm左右之雷射光照射
記錄次數。 相變化,係要求適合此相變化之光記錄媒體。一般 DVD RAM等之相變化光碟須保證1〇5〜1〇6次之重複 1288180 另一方面,當在基板上形成光記錄媒體用薄膜時係使 用濺鍍法,因靶之材料所產生之粒子多,可能造成品質變 差。尤其在高記錄密度媒體中,因粒子等造成記錄位元之 錯誤變成嚴重之問題。起因於此,將產生不良品而導致良 率變差。 以往所提案之光記錄媒體,係由GeU )-In(沒)_Sb( y )-Te( δ)合金所構成之靶,當各成分組成比+ 原子 %)=100 時,〇·1$α$7、 $占$ 30,其可進行CLV記錄與CAV記錄(參照特開 2002-264515 號公報)。 再者,前人提出之光記錄媒體,當其以GeaXbSbyTe〇 a-b-y)表示時 ’ X 係擇自 In、Au、Cu、Al、Ga、Pb、Ti、Sn 中之至少一種元素,其中〇 〇〇1 $ 0.20、0.01 $ bg 0.20 、0.40 $ y $ 0.90,且在記錄層含有氮(參照特開2〇〇2_ 264514號公報)。 再者,前人提出之光記錄媒體,其相變化記錄層以Sb 、Te作為必要元素,並對該SbTe添加至少一種以上之χ 元素,而 X 係選自 Ag、Au、Cu、Ζη、Β、Al、Ga、In、 Si、Ge、Sn、Pb、N、P、Bi、La、Ce、Cd、Tb(參照特開 2002-245663 號公報)。 再者,前人提出之相變化光碟用濺鍍靶,其係高純度 Ge,或擇自 Al、Si、Fe、Cr、Ta、Nb、Cu、Mn、Mo、 、Ni、Ti、Zr、Hf、Co、Ir、Pt、Ru、B 與 C 中至少一種 元素其含量在〇·1〜50at原子%範圍内之Ge合金,且Ag與 1288180 AU含量各在5pPm以下(參照特開20〇2-69624號公報)。 【發明内容】 本發明之目的,係為了提供光記錄媒體用 合金減鑛乾、該合金乾之製造方法、以及由該合金所構成 之光記錄媒體,該乾在濺鑛時粒子發生量少,可安定地製 作口口質佳之薄冑,且減少記錄位元錯誤的發生並達成高記 錄密度。 為了解決上述問題,本發明人#深入研究之結果發現 ,選擇適當組成之Ge-In-Sb-Te合金可達到高記錄密度, 並嚴格限制氧含量、且嚴謹地調整晶粒密度,可有效抑制 在濺鍍時粒子之產生。 基於此發現本發明提供出: L一種光記錄媒體用Ge-In-Sb-Te合金濺鍍靶及由該合 金所構成之光記錄媒體,係由Ge(a)_In(谷)_sb(n_Te((5) 合金所構成之靶,其特徵在於:當各成分組成比a、沒、 T、5 (原子%)合計為1〇〇時,〇」$ a $ 、〇1 $泠$ 1〇 Λ 60^ r ^ 90 ^ 10^ δ <22 ; 2·如上述1之光記錄媒體用Ge_In-Sb-Te合金濺鍍靶及 由該合金所構成之光記錄媒體,其氧含量在15〇〇ppm以下 3.如上述1之光記錄媒體用Ge-In-Sb-Te合金濺鍍靶及 由該合金所構成之光記錄媒體,其氧含量在800PPm以下 4·如上述1〜3中任一之光記錄媒體用Ge-In-Sb-Te合 1288180 金減餘,該無之結晶平均粒度在1〇〇//m以下; 5.如上述1〜3中任一之光記錄媒體用Ge-In-Sb-Te合 I濺鍍靶,該靶之結晶平均粒度在5 〇 "爪以下; 6·如上述1〜5中任一項之光記錄媒體用Ge-In-Sb-Te 合金濺鍍靶,其鐵含量為1〜l00pp„^ 發明效果 本發明之光記錄媒體用Ge-In-Sb-Te合金濺鍍靶以及 由A a金所構成之光記錄媒體,在濺鍍時粒子發生量少, 可安疋地裝作口口質佳之薄膜,可達成不發生記錄位元錯誤 且具高記錄密度之效果。 【實施方式】 本發明之光記錄媒體用Ge_In_Sb_Te合金濺鍍靶以及 由該合金所構成之光記錄媒體,係由Ge⑷-In⑷_Sb(r )-Te((5)合金所構成,當各成分組成比^、a、γ、以原 子合計為η)〇時, $90、10$ 5<22。該合令細入及1 + 口金、、且θ係可達到高記錄密度化之 組成’可實現結晶學上之相變化’亦即非結晶與結晶之相 變化,且可大幅提升重複記錄之次數。 再者,本發明之光記錄媒體用Ge如㈣合錢鑛 把,其乳含量纟15GGppm以下,又以將之嚴格限制在 8〇0PPm以下較佳。藉此,可顯著減少軸時粒子之發生, 而可安定地製作高品質薄媒’進而可製造不發生記錄位元 錯誤、達成高記錄密度之光記錄媒體。 又,由於在光記錄媒體中,氧會選擇性地與^結合 1288180 ’使得非結晶化與結晶化其相互轉變之安定性變差,導致 重複§己錄次數降低。因此,在得到高品質膜之考量點上, 限制光記錄媒體中之氧含量(盡量減少其含量)係重要的。 再者’在防止濺鍍時所產生之粒子上,將乾材之纟士晶 平均粒度限制至100 " m以下極為有效。藉此,同樣地可 製作不發生記錄位元錯誤之優良薄膜。耙材之結晶平均粒 度又以在50 μ m以下者較理想。 又,在本發明之光記錄媒體用金錢鍵 靶(記錄媒體)中,鐵含量在^丨㈧卯爪係具效果的。若^ 含量不到Ippm則不具添加之效果;若其超過1〇〇ppm則 CNR與D0W變差,故在添加鐵之情形下,鐵含量以 1〜1 OOppm車交佳。 本發明之光記錄媒體用Ge_In_Sb_Te合金濺錢乾,可 將Ge粉、In粉、Sb粉、Te粉在安瓿内合成,所得之錠粉 碎至既定之粒度後,使之均勻地分散混合後,利用熱壓機 ,以燒結溫度400〜600〇C、面壓75〜25〇kg/cm2之條件燒結 製造。 實施例 以下,根據實施例與比較例說明之。再者,本實施例 僅為一例,並未因該例而有所限制。亦即,本發明僅受申 請專利範圍所限制,其可包含本發明實施例以外之各種變 化形式。 (實施例1-7) 準備純度5叭99.999。/〇)之Ge粉、In粉、外粉、Te粉 10 1288180 ’將該等粉末以Ge(a)_In(/3)_Sb(r)-Te(5)組成調合後在 安親内合成’所得之錠粉碎至所需之粒度後填充至石墨製 模中’以溫度600°C、壓力15〇kg/cm2之條件進行熱壓。 將該燒結體進行最終之精加工形成靶。靶之相對密度 為99%(1〇〇%之密度為5 54g/cm3)。在該靶之任意3處所取 得之樣品密度以阿基米德法測定。 再者,在同組成中,Te含量占(at%)、氧含量(wtppm) 粒位(// m)、Fe 含篁、CNR(carrier to noise ratio)、 D〇W(direct over write)、濺鍍時產生之粒子之結果如表i 所示。 再者’ CNR(dB)係表示30m/s時之量測值;DOW係表 示進行100次覆寫記錄時以雜訊評估之結果。雜訊係最小 凹槽長信號(3T)相對於最大凹槽長信號(丨1T)之再生信號偏 差值,此處以其在20%以下為〇κ,在20%以上則判為NG。 又,評估樣品,係在DVD空白媒體上連續成膜出
ZnS-Si〇2(45nm)、記錄層(i5nm)、ZnS-SiO2(20nm)、A1-
Ti(l50nm)而製成。 比較例 (比較例1-6) 準備純度5Ν(99·999%)之Ge粉、in粉、sb粉、Te粉 ,將該等粉末以Ge(a)-In(/3)-Sb(y)-Te(占)組成調合並進 行乾式混合後,在安瓿内合成,所得之錠粉碎至既定之粒 度後填充至石墨製模中,以溫度6〇〇〇c、壓力i5〇kg/cm2 之條件進行熱壓。 11 1288180 將該燒結體進行最終精加工形成靶。靶之相對密度為 99%(100%之密度為5.54g/cm3)。在該靶之任意3處所取得 之樣品密度以阿基米德法測定。 再者,在同組成中,Te含量6 (at%)、氧含量(wtppm) 、粒徑(// m)、Fe含量、CNR(dB)、DOW、濺鍍時產生之 粒子之結果與實施例比較,如表1所示。又,CNR(dB)測 定值、DOW測定值、評估樣品之濺鍍條件以與實施例相同 之方法進行。
表1
5 at% 氧 wtppm 粒徑 μτη Fe wtppm CNR dB DOW 100次 粒子 實施例1 10.0 780 85 5 50 OK OK 實施例2 15.0 780 88 2 55 OK OK 實施例3 20.0 720 80 2 50 OK OK 實施例4 21.5 750 89 2 45 OK OK 實施例5 17.0 1300 87 2 50 OK OK 實施例6 15.0 700 30 2 50 OK OK 實施例7 15.0 450 95 <1 50 OK OK 比較例1 17.0 2000 80 2 45 NG NG 比較例2 17.0 780 200 2 50 OK NG 比較例3 17.0 770 95 120 20 NG OK 比較例4 17.0 2500 80 <1 50 NG NG 比較例5 22.0 770 90 2 20 NG OK 比較例6 5.0 760 90 5 10 NG OK 12 1288180 粒子Ok係表示粒子未達500個/晶圓;NG係表示其 超過5 0 0個/晶圓。 實施例1-6其氧含量在700-1300ppm之範圍内;粒徑 在30-89 /z m; CNR(dB)在45-55之範圍内;DOW、粒子發 生量之判定為OK。 又,關於實施例7,雖然Fe含量<lwtppm,但原料中 所含之氧含量低僅500ppm以下(450wtppm),故與上述實 施例相同,不論是CNR(dB)、DOW、粒子發生量均良好。 相較於此,由於比較例1之氧含量多達2000ppm,故 DO W、粒子發生量不理想。比較例2其粒徑大達200 /z m ,故粒子之發生量 NG。比較例 3其 Fe含量過多達 120ppm,故DOW變差。比較例4其氧含量多達2500ppm ,且Fe<lppm,故DOW、粒子發生量不理想。在無Fe之 情形下氧含量提高。比較例5由於5為22.0at%造成組成 偏差(過量),故DOW不理想。比較例6由於5為5.0at% 造成組成偏差(過少),故DOW不理想。 如上所述,可知在由Ge( a )-In( /3 )-Sb( 7 )-Te( 5 )合金 所構成之靶材中,Te( 5 )組成之偏差將對光記錄媒體之特 性造成很大之影響。 又,祀之氧含量、粒徑在本發明之範圍中時,具有得 到良好CNR(dB)與DOW、以及抑制粒子發生之效果。再 者,Fe含量會影響氧含量,適當之Fe存在具有抑制濺鍍 時粒子發生之效果。又,可知當在氧含量非常低之情形下 ,與Fe含量無關,均可得到與前述相同之良好結果。 13 1288I8〇 月效果 本發明係適用於光記錄媒體用Ge-In_Sb-Te*金錢鑛 靶、該合金靶之製造方法、以及由該合金所構成之光記= 媒體,該靶在濺鍍時粒子發生量少,可安定地製作品質佳 之薄膜,且減少圮錄位元錯誤的發生並達成高記錄密度。 14
Claims (1)
1288 93110820 號(96 年8 月修正) 拾、申請專利範圍: 1·一種光記錄媒體用Ge_In_Sb_Te合金濺鍍靶,係由 Ge(o: ) In(/3 ) Sb(r )-Te(5 )合金所構成之乾,其特徵在於: 當各成分組成比α、万、r,子%)合計為ι〇〇時 ,〇.心 $ iG、G]以錢、_ r ㈣、i()y 氧含量在15()()Ppm以下,且該乾之結晶平均粒度在⑽ m以下。 2.如申叫專利靶圍第i項之光記錄媒體用Gqn-ShTe 合金濺鍍靶,其氧含量在8〇〇ppm以下。 3·如申請專利範圍第1或2項之光記錄媒體用Ge_In_ ^合金濺鍍無,該乾之結晶平均粒度在5〇…下。 4. 如申請專利範圍第1或2項之光記錄媒體用Ge_In_ Sb-Te合金濺鍍靶,其鐵含量為 5. 如申請專利範圍第3項之光記錄媒體用 合金濺鍍靶,其鐵含量為1〜10〇ppm。 6. 一種Ge-In.sb-Te合金構成之光記錄媒體, a )-In(/S )-Sb((r )_Te((5 )合全 徵在於: 所構成之光記錄媒體,其特 當:成分組成❹十”以原輝計為⑽時 10、°.匕 h 10、6〇$ r 請、10“ <22 , 氧3里在lSOOppm以下。 7. 如申請專利範圍第6項之〜七孤 記錄媒體,其氧含量在8〇〇ppm以下。 構成之光 15
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| JP5045804B2 (ja) * | 2009-10-29 | 2012-10-10 | 住友金属鉱山株式会社 | 抵抗薄膜形成用スパッタリングターゲット、抵抗薄膜、薄膜抵抗器、およびこれらの製造方法 |
| JP5153911B2 (ja) | 2011-04-22 | 2013-02-27 | 三菱マテリアル株式会社 | スパッタリングターゲット及びその製造方法 |
| JP6037421B2 (ja) | 2014-03-25 | 2016-12-07 | Jx金属株式会社 | Sb−Te基合金焼結体スパッタリングターゲット |
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| WO2005005683A1 (ja) | 2005-01-20 |
| TW200502412A (en) | 2005-01-16 |
| JP4582457B2 (ja) | 2010-11-17 |
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