TWI663273B - 鎢濺鍍靶及其製造方法 - Google Patents
鎢濺鍍靶及其製造方法 Download PDFInfo
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- 238000005477 sputtering target Methods 0.000 title claims abstract description 38
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 229910052721 tungsten Inorganic materials 0.000 title claims description 21
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 title description 16
- 239000010937 tungsten Substances 0.000 title description 16
- 239000012535 impurity Substances 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 15
- 239000002245 particle Substances 0.000 claims description 41
- 239000000843 powder Substances 0.000 claims description 30
- 239000000203 mixture Substances 0.000 claims description 19
- 229910052709 silver Inorganic materials 0.000 claims description 9
- 238000005245 sintering Methods 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 5
- 239000010409 thin film Substances 0.000 abstract description 23
- 239000010408 film Substances 0.000 abstract description 22
- 238000004544 sputter deposition Methods 0.000 abstract description 15
- 239000004065 semiconductor Substances 0.000 abstract description 9
- 230000000052 comparative effect Effects 0.000 description 13
- 239000002994 raw material Substances 0.000 description 11
- 238000000227 grinding Methods 0.000 description 9
- 229910052799 carbon Inorganic materials 0.000 description 8
- 239000013078 crystal Substances 0.000 description 8
- 238000005520 cutting process Methods 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 239000011812 mixed powder Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 238000012545 processing Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 238000005551 mechanical alloying Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000001036 glow-discharge mass spectrometry Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000002772 conduction electron Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 208000037584 hereditary sensory and autonomic neuropathy Diseases 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229910021332 silicide Inorganic materials 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- WQJQOUPTWCFRMM-UHFFFAOYSA-N tungsten disilicide Chemical compound [Si]#[W]#[Si] WQJQOUPTWCFRMM-UHFFFAOYSA-N 0.000 description 1
- 229910021342 tungsten silicide Inorganic materials 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Abstract
一種濺鍍靶,其特徵在於:含有0.01~0.5wt%之Ag,剩餘部份由W及不可避免之雜質構成。本發明之課題在於提供一種濺鍍靶及其製造方法,其經由濺鍍可形成比電阻小之膜,又,具備良好之均勻性,尤其於形成半導體裝置用薄膜時,具有優異特性。
Description
本發明係關於一種鎢濺鍍靶及其製造方法,尤其有關於一種可形成低電阻、穩定之半導體裝置用薄膜之濺鍍靶及其製造方法。
半導體裝置逐年被要求細微化、高積體化,製造製程之改良或新原料之研究等正在盛行。例如,閘極一般而言使用多晶矽或金屬矽化物,但為了更進一步低電阻化,正在進行使用全部由金屬組成之閘極(金屬電極)之研究。然後,組合如上述之閘極與高介電常數之閘極絕緣膜(gate insulating film),藉此高速化.低耗電化變得可能。
一部分之半導體裝置中,作為上述金屬電極,使用有W(鎢)。鎢膜(閘極)通常係將鎢靶進行濺鍍而形成。專利文獻1中揭示有一種鎢靶,其含有0.01~1重量%之Ni,該Ni用於形成閘圖案(gate pattern)之一部分,即鎢矽化物。又,專利文獻2中揭示有一種W靶,其雖係用於形成障壁膜,但含有10~30at%之Ni。
然而,使用該等靶而形成之薄膜中,存在無法充分地降低比電阻之問題。尤其是使用於閘極之情形時,若能充分地降低比電阻,則可相應地使該閘極的膜厚變薄,但於以往之含Ni等的W靶中無法獲得此種優點。又,一直以來亦未特別關心比電阻之均勻性(uniformity)。
[專利文獻1]日本特開2010-261103號公報
[專利文獻2]國際公開WO2010/119785號公報
本發明之課題在於提供一種濺鍍靶及該濺鍍靶之製造方法,可經由濺鍍形成比電阻小之膜,又,具備良好之均勻性,作為半導體裝置用之薄膜(尤其是閘極)而有用,於形成此閘極之膜時,具有優異特性。
本發明人等為了解決上述問題進行努力研究,結果發現,將Ag微量添加於W(鎢),又,鑽研其製造方法,藉此可使Ag不固溶於鎢中,降低膜之比電阻,進而藉由抑制Ag之組成偏差,可提升比電阻之均勻性。
本發明人等基於此發現,而提供以下發明。
1)一種濺鍍靶,其含有0.01~0.5wt%之Ag,剩餘部份由W及不可避免之雜質構成。
2)如1)之濺鍍靶,其特徵在於具有由W之母相與Ag粒子構成之組織,Ag未固溶於W母相中。
3)如1)或2)之濺鍍靶,其特徵在於Ag粒子之平均粒徑為0.1~10.0μm。
4)如1)至3)中任一者之濺鍍靶,其特徵在於靶中之Ag的組成偏差為10%以內。
5)如1)至4)中任一者之濺鍍靶,其特徵在於純度為99.999%以上。
6)一種濺鍍靶之製造方法,其特徵在於將平均粒徑為0.1~10.0μm之W粉末與平均粒徑為0.1~10.0μm之Ag粉末,以Ag為0.01~0.5wt%,剩餘部份為W及不可避免之雜質之摻合比進行混合,對其以15~30MPa之施加壓力、溫度1600~2000℃進行燒結。
本發明具有如下之優異效果:可獲得能夠形成比電阻小,具
備良好均勻性之膜,適用於半導體裝置用之薄膜(尤其是閘極)膜之形成的濺鍍靶。
本發明之濺鍍靶之特徵在於含有0.01~0.5wt%之Ag,剩餘部份由W及不可避免之雜質構成。若Ag之含量未達0.01wt%,則無法充分降低膜之比電阻,另一方面若超過0.5wt%,則於形成之薄膜中,Ag本身會成為雜質,無法獲得所欲之裝置特性,故欠佳。因此,Ag之含量設為0.01~0.5wt%之範圍。
又,本發明之濺鍍靶之特徵在於具有由W之母相與Ag粒子構成之組織,Ag未固溶於W母相中。其原因在於,若Ag完全地固溶於W母相中,則於W之晶格會產生形變,導致傳導電子散射,其移動受到妨礙,故電阻增加。本發明利用掃描式電子顯微鏡(倍率:2000倍),觀察濺鍍靶面內之9處(中心1點、1/2R[半徑]之平均4點、R[外圍部]之平均4點),若在全部之點中於視野1mm2確認到粒徑0.1μm以上之Ag粒子,則判斷Ag未完全地固溶。
又,W本身於燒結時會結晶化,Ag存在於此W結晶粒之晶界,存在於晶界之Ag粒子的大小其平均粒徑較佳為0.1~10.0μm。若平均粒徑未達0.1μm,則只有與Ag固溶時相同的效果,另一方面,若平均粒徑超過10.0μm,則因與W之濺鍍速率不同,容易產生瘤塊(nodule),成為粒子(particle)之產生原因,故欠佳。再者,平均粒徑可使用百格測試法(crosscut
method)而算出。
本發明之濺鍍靶較佳將靶中之Ag之組成偏差設為10%以內。如後所述,藉由調整原料粉末粒徑、調整混合條件,可抑制靶中之Ag的組成偏差。其原因在於,若Ag之組成偏差超過此數值範圍,則比電阻之均勻性明顯地降低。
Ag之組成的偏差係以如下方式算出:於圓盤狀之靶中,針對中心1點、1/2R(半徑)之平均八點、以及距外圍1cm之內側(外圍部)之平均8點,合計17點,測量各點(體積0.5~2cm3)中Ag之含量,使用下式而自其最大值、最小值、平均值算出。
Ag之組成偏差(%)={(Ag含量之最大值)-((Ag含量之最小值)}/((Ag含量之平均值)×100
又,本發明之濺鍍靶較佳純度為99.999%(5N)以上。再者,上述純度可自利用GDMS(輝光放電質譜術)測量之雜質含量算出,上述雜質中不含有作為構成元素W及Ag、氣體成分(O、C、N、H、S、P)。由本發明之靶形成的薄膜,尤其是作為半導體裝置之閘極而使用者,若此閘極中含有大量鹼金屬或過度金屬等之金屬雜質,則該等雜質會使裝置特性惡化,使作為半導體裝置之品質劣化。
本發明之濺鍍靶可使用粉末燒結法而製作。
首先,準備平均粒徑0.1~10.0μm之W粉末與平均粒徑0.1~10μm之Ag粉末。該等原料粉末較佳使用純度5N以上者。繼而,將該等粉末以Ag成為0.01~0.5wt%之摻合比進行混合。對於混合,尤其使用球磨機或機械合金化(mechanical alloying)等,藉此使Ag均勻地分散。
繼而,以15~30MPa之施加壓力,1600~2000℃經由熱壓燒結混合粉末,而可製造靶材(燒結體)。若燒結溫度過低,則存在燒結體之密度未充分提升之問題,另一方面,若燒結溫度過高,則有Ag固溶於W中之虞。又,燒結時設為15~30MPa之施加壓力的原因在於,於未達15MPa之低壓,密度不會上升,若施加超過30MPa之高壓,則會產生平行於壓面之層狀裂痕。
又,進行冷均壓加壓處理(CIP處理)或熱均壓加壓處理(HIP處理)對於進一步提高靶密度有效。HIP處理可於1600~2000℃,100~200MPa之條件下進行。藉此,可得到密度95%以上之燒結體。可將以此方式獲得之燒結體,藉由切斷、切削.研磨等製作靶。又,於作為濺鍍靶而使用之情形時,會將其黏合於背板而使用。
繼而,針對實施例進行說明。再者,本實施例用於表示發明之一例,本發明不受該等實施例之限制。即,包括本發明之技術思想所含有之其他態樣及變形。
作為原料粉末,使用純度5以上,平均粒徑2.0μm之W粉末與純度5N以上,平均粒徑5.0μm之Ag粉末,以特定之比例摻合,將其於球磨機進行混合。繼而,將此混合粉末填充於碳模具(carbon mold)中,在真空環境中加熱至1800℃,以15MPa進行熱壓。藉此,獲得Ag為0.05wt%,剩餘部份由W及不可避免之雜質構成之燒結體。此時,燒結體密度為99.1%。繼而,將以此方式獲得之燒結體進行切削、研磨等機械加工,製作直徑
440mm,厚度3mm之圓盤狀濺鍍靶,調查此靶內之Ag的組成偏差。結果,Ag之組成偏差為10%以內。又,利用掃描式電子顯微鏡觀察此靶,於W結晶之晶界確認到Ag粒子。
繼而,使用此靶進行濺鍍,形成含Ag之鎢薄膜。再者,濺鍍條件設為如下(以下之實施例及比較例亦設為相同條件):電源:直流方式,電力:15kW,終極真空度:5×10-8Torr,環境氣體組成:Ar,濺鍍氣體壓力:5×10-3Torr,濺鍍時間:15秒。對所獲得之薄膜,使用克萊譚克公司製造之OmniMap,測量膜之片電阻,又,使用XRR(X射線反射率測量)測量膜厚,而算出膜之比電阻(Ω.cm)。其結果,相較於不含Ag之情形(比較例1),比電阻降低8%。又,測量面內之比電阻之均勻性(uniformity),得到5%以下之良好結果。將以上結果示於表1。
作為原料粉末,使用純度5以上,平均粒徑2.0μm之W粉末與純度5N以上之Ag塊,以特定之比例摻合,將其使用機械合金化而進行混合。繼而,將此混合粉末填充於碳模具中,在真空環境中加熱至1600℃,以30MPa進行熱壓。藉此,獲得Ag為0.05wt%,剩餘部份由W及不可避免之雜質構成之燒結體。此時,燒結體密度為99.1%。
將以此方式獲得之燒結體進行切削、研磨等機械加工,製作直徑440mm,厚度3mm之圓盤狀濺鍍靶,調查此靶內之Ag的組成偏差。結果,Ag之組成偏差為10%以內。又,利用掃描式電子顯微鏡觀察此靶,於W結晶之晶界確認到Ag粒子。繼而,使用此靶進行濺鍍,形成含Ag之鎢薄膜。對所獲得之薄膜,使用與實施例1相同的方法而算出膜之比電阻(Ω.cm)。其結果,相較於不含Ag之情形(比較例1),比電阻降低9%。又,測量面內之比電阻之均勻性(uniformity),得到5%以下之良好結果。
作為原料粉末,使用純度5以上,平均粒徑2.0μm之W粉末與純度5N以上,平均粒徑10.0μm之Ag粉末,以特定之比例摻合,將其於球磨機中進行混合。繼而,將此混合粉末填充於碳模具中,在真空環境中加熱至1700℃,以20MPa進行熱壓。藉此,獲得Ag為0.5wt%,剩餘部份由W及不可避免之雜質構成之燒結體。此時,燒結體密度為99.2%。
將以此方式獲得之燒結體進行切削、研磨等機械加工,製作直徑440mm,厚度3mm之圓盤狀濺鍍靶,調查此靶內之Ag的組成偏差。結果,Ag之組成偏差為10%以內。又,利用掃描式電子顯微鏡觀察此靶,於W
結晶之晶界確認到Ag粒子。繼而,使用此靶進行濺鍍,形成含Ag之鎢薄膜。對所獲得之薄膜,使用與實施例1相同的方法而算出膜之比電阻(Ω.cm)。其結果,相較於不含Ag之情形(比較例1),比電阻降低18%。又,測量面內之比電阻之均勻性(uniformity),得到5%以下之良好結果。
作為原料粉末,使用純度5以上,平均粒徑2.0μm之W粉末與純度5N以上之Ag塊,以特定之比例摻合,將其使用機械合金化而進行混合。繼而,將此混合粉末填充於碳模具中,在真空環境中加熱至1600℃,以30MPa進行熱壓。藉此,獲得Ag為0.5wt%,剩餘部份由W及不可避免之雜質構成之燒結體。此時,燒結體密度為99.4%。
將以此方式獲得之燒結體進行切削、研磨等機械加工,製作直徑440mm,厚度3mm之圓盤狀濺鍍靶,調查此靶內之Ag的組成偏差。結果,Ag之組成偏差為10%以內。又,利用掃描式電子顯微鏡觀察此靶,於W結晶之晶界確認到Ag粒子。繼而,使用此靶進行濺鍍,形成含Ag之鎢薄膜。對所獲得之薄膜,使用與實施例1相同的方法而算出膜之比電阻(Ω.cm)。其結果,相較於不含Ag之情形(比較例1),比電阻降低19%。又,測量面內之比電阻之均勻性(uniformity),得到5%以下之良好結果。
作為原料粉末,準備純度5以上,平均粒徑2.0μm之W粉末,將其填充於碳模具中,在真空環境中加熱至1800℃,以25MPa進行熱壓。藉此,獲得由W及不可避免之雜質構成之燒結體。此時,燒結體密度為99.2%。繼而,將以此方式獲得之燒結體進行切削、研磨等機械加工,製作直徑
440mm,厚度3mm之圓盤狀濺鍍靶。繼而,使用此靶進行濺鍍,形成鎢薄膜。對所獲得之薄膜,使用與實施例1相同的方法而測量膜之比電阻(Ω.cm)。再者,將比較例1之比電阻作為基準,進行與實施例1之比較。
作為原料粉末,使用純度5以上,平均粒徑2.0μm之W粉末與純度5N以上,平均粒徑2.0μm之Ag粉末,以特定之比例摻合,將其使用V型混合機而進行混合。繼而,將此混合粉末填充於碳模具中,在真空環境中加熱至1700℃,以30MPa進行熱壓。藉此,獲得Ag為0.05wt%,剩餘部份由W及不可避免之雜質構成之燒結體。此時,燒結體密度為99.2%。
將以此方式獲得之燒結體進行切削、研磨等機械加工,製作直徑440mm,厚度3mm之圓盤狀濺鍍靶,調查此靶內之Ag的組成偏差。結果,Ag之組成偏差為40%。又,利用掃描式電子顯微鏡觀察此靶,於W結晶之晶界確認到Ag粒子。繼而,使用此靶進行濺鍍,形成含Ag之鎢薄膜。對所獲得之薄膜,使用與實施例1相同的方法,算出膜之比電阻(Ω.cm)。其結果,相較於不含Ag之情形(比較例1),比電阻降低9%。又,測量出面內之比電阻之均勻性(uniformity)為10%以上。
作為原料粉末,使用純度5以上,平均粒徑2.0μm之W粉末與純度5N以上,平均粒徑5.0μm之Ag粉末,以特定之比例摻合,將其於球磨機中進行混合。繼而,將此混合粉末填充於碳模具中,在真空環境中加熱至1600℃,以20MPa進行熱壓。藉此,獲得Ag為0.5wt%,剩餘部份由W及不可避免之雜質構成之燒結體。此時,燒結體密度為99.6%。
將以此方式獲得之燒結體進行切削、研磨等機械加工,製作直徑440mm,厚度3mm之圓盤狀濺鍍靶,調查此靶內之Ag的組成偏差。其結果,Ag之組成偏差為24%。又,利用掃描式電子顯微鏡觀察此靶,於W結晶之晶界確認到Ag粒子。繼而,使用此靶進行濺鍍,形成含Ag之鎢薄膜。對所獲得之薄膜,使用與實施例1相同的方法,算出膜之比電阻(Ω.cm)。其結果,相較於不含Ag之情形(比較例1),比電阻降低17%,但測量出面內之比電阻之均勻性(uniformity)為10%以上。
作為原料粉末,使用純度5以上之W塊與純度5N以上之Ag塊,以特定之比例投入爐內進行EB熔解。藉此,獲得Ag為0.05wt%,剩餘部份由W及不可避免之雜質構成之鑄錠。將以此方式獲得之鑄錠進行切削、研磨等機械加工,製作直徑440mm,厚度3mm之圓盤狀濺鍍靶。然後,利用掃描式電子顯微鏡觀察此靶,於W結晶之晶界無法確認到Ag粒子。繼而,使用此靶進行濺鍍,形成含Ag之鎢薄膜。對所獲得之薄膜,使用與實施例1相同的方法,算出膜之比電阻(Ω.cm)。其結果,相較於不含Ag之情形(比較例1),未觀察到比電阻之降低。
本發明之濺鍍靶及其製造方法具有如下之優異效果,故對於半導體裝置用薄膜(尤其是閘極)之形成有用:可形成比電阻小,具備良好比電阻的均勻性之膜。
Claims (8)
- 一種濺鍍靶,其含有0.01~0.5wt%之Ag,剩餘部份由W及不可避免之雜質構成。
- 如申請專利範圍第1項之濺鍍靶,其具有由W之母相與Ag粒子構成之組織,Ag未固溶於W母相中。
- 如申請專利範圍第1項之濺鍍靶,其中,Ag之粒子之平均粒徑為0.1~10μm。
- 如申請專利範圍第2項之濺鍍靶,其中,Ag粒子之平均粒徑為0.1~10μm。
- 如申請專利範圍第1至4項中任一項之濺鍍靶,其中,靶中之Ag的組成偏差為10%以內。
- 如申請專利範圍第1至4項中任一項之濺鍍靶,其中,雜質以外之元素之合計之純度為99.999%以上。
- 如申請專利範圍第5項之濺鍍靶,其中,雜質以外之元素之合計之純度為99.999%以上。
- 一種濺鍍靶之製造方法,其將平均粒徑為0.1~10μm之W粉末與平均粒徑為0.1~10μm之Ag粉末,以Ag為0.01~0.5wt%,剩餘部份為W及不可避免之雜質之摻合比進行混合,對其以15~30MPa之施加壓力、溫度1600~2000℃進行燒結。
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3045331A (en) * | 1959-06-26 | 1962-07-24 | Mallory & Co Inc P R | Electrical contacts of high arc erosion resistance and method of making the same |
WO2005086180A1 (ja) * | 2004-03-09 | 2005-09-15 | Idemitsu Kosan Co., Ltd. | 薄膜トランジスタ及び薄膜トランジスタ基板及びこれらの製造方法及びこれらを用いた液晶表示装置及び関連する装置及び方法、並びに、スパッタリングターゲット及びこれを用いて成膜した透明導電膜及び透明電極及び関連する装置及び方法 |
TW200902741A (en) * | 2007-05-04 | 2009-01-16 | Starck H C Inc | Fine grained, non banded, refractory metal sputtering targets with a uniformly random crystallographic orientation, method for making such film, and thin film based devices and products made therefrom |
WO2014148588A1 (ja) * | 2013-03-22 | 2014-09-25 | Jx日鉱日石金属株式会社 | タングステン焼結体スパッタリングターゲット及びその製造方法 |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6258524A (ja) * | 1985-09-06 | 1987-03-14 | エヌオーケー株式会社 | 電気接点部品の接触面被覆方法 |
JP3721014B2 (ja) | 1999-09-28 | 2005-11-30 | 株式会社日鉱マテリアルズ | スッパタリング用タングステンターゲットの製造方法 |
JP3905301B2 (ja) | 2000-10-31 | 2007-04-18 | 日鉱金属株式会社 | タンタル又はタングステンターゲット−銅合金製バッキングプレート組立体及びその製造方法 |
US6660136B2 (en) * | 2002-03-27 | 2003-12-09 | Micron Technology, Inc. | Method of forming a non-volatile resistance variable device and method of forming a metal layer comprising silver and tungsten |
JP3809435B2 (ja) * | 2002-11-11 | 2006-08-16 | 住友電気工業株式会社 | 放電加工用電極材料 |
EP1574591A4 (en) | 2002-11-11 | 2010-01-27 | Sumitomo Electric Industries | ELECTRODE MATERIAL FOR SPARK EROSION PROCESSING AND ITS MANUFACTURING METHOD |
JP3822608B2 (ja) * | 2004-03-04 | 2006-09-20 | 松下電器産業株式会社 | チャッキング装置 |
US8197894B2 (en) * | 2007-05-04 | 2012-06-12 | H.C. Starck Gmbh | Methods of forming sputtering targets |
KR101269787B1 (ko) | 2008-06-02 | 2013-05-30 | 제이엑스 닛코 닛세키 킨조쿠 가부시키가이샤 | 텅스텐 소결체 스퍼터링 타겟 |
CN102197155B (zh) | 2009-04-17 | 2013-07-17 | 吉坤日矿日石金属株式会社 | 半导体布线用阻挡膜、烧结体溅射靶及溅射靶的制造方法 |
KR20100121258A (ko) | 2009-05-08 | 2010-11-17 | 삼성전자주식회사 | 스퍼터링 타겟 및 이를 이용하여 제조되는 반도체 소자 |
JP4797099B2 (ja) | 2009-10-01 | 2011-10-19 | Jx日鉱日石金属株式会社 | 高純度タングステン粉末の製造方法 |
JP5944482B2 (ja) * | 2012-03-02 | 2016-07-05 | Jx金属株式会社 | タングステン焼結体スパッタリングターゲット及び該ターゲットを用いて成膜したタングステン膜 |
US20140360871A1 (en) | 2012-05-22 | 2014-12-11 | Jx Nippon Mining & Metals Corporation | Fe-Pt-Ag-C-Based Sputtering Target Having C Grains Dispersed Therein, and Method for Producing Same |
JP5851612B2 (ja) | 2012-11-02 | 2016-02-03 | Jx日鉱日石金属株式会社 | タングステン焼結体スパッタリングターゲット及び該ターゲットを用いて成膜したタングステン膜 |
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3045331A (en) * | 1959-06-26 | 1962-07-24 | Mallory & Co Inc P R | Electrical contacts of high arc erosion resistance and method of making the same |
WO2005086180A1 (ja) * | 2004-03-09 | 2005-09-15 | Idemitsu Kosan Co., Ltd. | 薄膜トランジスタ及び薄膜トランジスタ基板及びこれらの製造方法及びこれらを用いた液晶表示装置及び関連する装置及び方法、並びに、スパッタリングターゲット及びこれを用いて成膜した透明導電膜及び透明電極及び関連する装置及び方法 |
TW200902741A (en) * | 2007-05-04 | 2009-01-16 | Starck H C Inc | Fine grained, non banded, refractory metal sputtering targets with a uniformly random crystallographic orientation, method for making such film, and thin film based devices and products made therefrom |
WO2014148588A1 (ja) * | 2013-03-22 | 2014-09-25 | Jx日鉱日石金属株式会社 | タングステン焼結体スパッタリングターゲット及びその製造方法 |
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JPWO2016052380A1 (ja) | 2017-04-27 |
JP6310088B2 (ja) | 2018-04-11 |
TW201612348A (en) | 2016-04-01 |
WO2016052380A1 (ja) | 2016-04-07 |
KR101960206B1 (ko) | 2019-03-19 |
US20170211176A1 (en) | 2017-07-27 |
KR20170046723A (ko) | 2017-05-02 |
SG11201701835PA (en) | 2017-04-27 |
US10176974B2 (en) | 2019-01-08 |
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