CN101379213A - 面对等离子的壁的水蒸气钝化 - Google Patents
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Abstract
本发明揭示一种从一远程等离子体源(60)提供氢自由基的腔室钝化方法,其对于在涂覆一阻挡层至一通孔内之前以氢等离子体来清洗低k介电质是特别有用的。对于每一晶圆,腔室是以水蒸气(86)(或其它甚至更能被化学吸收在面对等离子体的壁上的气体)来钝化,其中该水蒸气在氢等离子体引发之前被通过远程等离子体源。水蒸气被吸收在壁(78,79)上,例如远程等离子体源的氧化铝与石英部件,且形成一保护性单层,保护性单层能够持续足够长久以在氢等离子体产生持续时间保护壁。藉此,面对等离子体的壁(尤其是介电质,例如氧化铝)可以被保护免于蚀刻。
Description
发明领域
本发明一般涉及在制造集成电路的过程中的等离子体清洗。特别地,本发明涉及在图案化蚀刻介电层与沉积之间执行的等离子体清洗。
背景技术
高级集成电路,诸如对45nm节点构想出来的高级集成电路,将需要使用超低k介电(电绝缘)材料以用于连接两层配线之间的层间(interlevel)介电层。介电常数低于3.9(二氧化硅的介电常数值)的低k材料已经进入商业量产。然而,未来将会需要更低的介电常数,例如低于2.5。此材料的一示例为Black DiamondTMII(BDII)介电质,其可由美国加州圣大克劳拉市Applied Materials公司所购得。Li在美国专利申请案No.2003/0194495中描述到,此介电材料被表征为碳掺杂的氧化硅(也被称为碳氧化硅),其具有高于10at%的碳百分比。改良物是包括有BDIIx介电质(其被UV硬化且具有30%的孔隙度),以及用电子来硬化的DBIIebeam(DBII电子束)介电质。其它含碳的低k介电质是已知的,包括有与(苯环丁烯)介电材料,其可由Dow Chemical公司获得。许多这些材料被表征为有机或聚合介电质。
用来形成层间互连(interlevel interconnect)的一原型结构在图1的截面图中示出。下介电层10包括形成于其表面的导电部件12。用于高级层间连接的导电部件12典型地由铜构成,但是类似的几何结构应用于接触硅基板的活性半导体区域。超低k介电材料的上介电层14被沉积在下介电层10与导电部件上方。孔16被光刻限定,且被蚀刻穿过上介电层14至导电部件12。对于用在铜金属化的典型双镶嵌互连,孔16由形成了至导电部件12的垂直互连的窄的下方通孔与形成了集成电路不同部分之间的水平互连的宽的上方沟槽所构成。对于双镶嵌结构,导电部件12可以是形成在下介电层10中的被填满铜的沟槽的一部分。在该孔已经被蚀刻之后,薄的基本上共形的阻挡层(例如Ta/TaN)通常藉由磁控溅镀镀覆至孔16的侧壁上,并镀覆至上介电层14的场区域上。然后薄的基本共形的铜晶种层被沉积在阻挡层上(通常也是藉由磁控溅镀)。之后,铜被电镀至16内以及场区域上方。最后,化学机械研磨(CMP)被用来去除孔16外面的铜。
光刻蚀刻步骤(甚至在光阻灰化之后)常常将碳或氟碳聚合层18留在孔16的侧壁上,这被有利地用来实现高各向异性蚀刻,但是在蚀刻停止后会残留。也会残余一蚀刻残余物20于沟槽底部,其是为蚀刻化学的碳、硅与氟副产物的组合。再者,导电部件12中暴露的铜可能已经氧化成氧化铜。又,灰化残余物22倾向于形成在孔16的唇部。若孔16底部的蚀刻残余物20与氧化铜没有在金属化沉积之前阻挡层沉积以先被去除,蚀刻残余物20与氧化铜会增加接触电阻。聚合覆层18与灰化残余物22会干扰阻挡层至介电层14的键结,因此阻挡层与铜通孔结构在制造或操作持续时间会分层(delaminate),造成了显著的可靠性问题。因而,在阻挡层沉积以先去除残余物18、20、22与氧化铜是有需要的。
就传统的氧化硅介电质而言,藉由在蚀刻与沉积步骤之间溅镀蚀刻经图案化晶圆以去除残余物来干式清洗晶圆是普遍的。这样的溅镀蚀刻典型地包括有高能量离子,高能量离子不会较大地影响相对较硬的氧化硅介电质。然而,低k介电层倾向于相对较软。所以,溅镀蚀刻倾向于有害地蚀刻且劣化低k介电层。较软的化学蚀刻可以利用被产生在清洗腔室内且邻近于晶圆的氧等离子体(即原位等离子体)而被执行。对于早期型式的具有约3.7介电常数k且非多孔性的低k介电质,此清洗过程已经被证明令人满意。然而,对于大部分近期的具有约2.5介电常数k与大于10%孔隙度的超低k膜,原位氧等离子体已经被证明无法令人满意。所被相信的是,氧等离子体包括高比例的氧原子,这些氧原子被吸引至负自偏压,其中该负自偏压形成在暴露于等离子体的漂浮体上。接着,氧离子撞击超低k膜,且具有足够能量来破坏超低k膜。因而,此技术已经被开发成从远程等离子体源(remote plasma source,RPS)产生的氧等离子体来清洗经图案化晶圆,如同Wood等人于美国专利公开2004/0219789中所揭示的。远程产生的等离子体是强调电中性自由基,虽然离子在等离子体抵达处理空间时会残留;而原位等离子体是强调被产生在处理空间中或靠近处理空间的带电荷离子。远程产生的氧等离子体会发射许多中性且低能量氧自由基至晶圆,其会氧化且与不同的残余物发生化学反应以将其去除。
然而,对于超低k介电材料,激化的氧已经被证明无法令人满意。介电常数的降低常常藉由介电材料中高孔隙度来获得。BDII介电层可以具有超过10%(甚至高于30%)的孔隙度。因此,这些介电层不仅非常柔软,这些介电层对于一氧化干式清洗也是极易反应的。此外,被并入介电质中的氧倾向于产生比硅与碳键更极性的键,而增加了介电常数。故而,基于还氧化学的干式清洗已经被开发出,其使用例如远程产生的NH3(参阅授予Kropewnicki等人的美国专利US6,440,864)或相对较高H2压力的等离子体。氢方式已经普及,但是结果依然无法完全令人满意。甚至氢等离子体中非常少量的水蒸气会较大地降低多孔性低k膜的厌水性质,且因而倾向于增加了介电常数。甚至纯氢等离子体会倾向于劣化低k材料。再者,合理的蚀刻速率已经藉由增加腔室压力被达到,但是电源能力必须依循所增加的压力。此外,在更高的氢压力下,来自远程等离子体源而被离子化且泄漏入清洗腔室的氢的比例会增加。氢离子倾向于被吸引至晶圆,且我们相信这些氢离子会破坏多孔性低k材料。
本案申请人与其它人在美国专利申请11/334,803(其在2006年1月17日提交且在此被并入本文以作为参考)描述一种利用远程产生的纯氢气或氢与氦气的混合气体的等离子体以预清洗多孔性低k介电质的过程。等离子体被产生于远程等离子体源中,且离子从源输出被过滤使得仅有氢自由基可以抵达晶圆。使用远程产生的自由基以进行腔室清洗及这样的远程等离子体源的示例是已经被Chen等人揭示于“Advances in remotePlasma Sources For Cleaning 300mm and Flat Panel CVD Systems,”Semiconductor Magazine,2003年8月,第6页之中。清洗效能可以藉由于低的氢分压下操作而被改善,例如对于纯氢是低于150毫托且较佳为30毫托。虽然清洗效能已经被观察到十分良好,昂贵的远程等离子体源在其失效前却展现短寿命。所被相信的是,氢等离子体会攻击且蚀刻等离子体源的铝壁。阳极化的铝壁,如同化学类似的氧化铝壁一样,被观察到在氢等离子体中会劣化。以石英壁来取代铝壁可以某种程度地增加寿命。然而,石英内衬的等离子体源甚至更昂贵,且石英也已经被观察到在氢等离子体中会劣化。类似的蚀刻效应已经被观察到存在于等离子体源与离子过滤器之间的氧化铝内衬中。
发明内容
等离子体处理腔室是在处理气体(例如蚀刻或清洗气体,特别是例如氢的还原气体)的等离子体引发之前被钝化以未激化水蒸气。较佳地,钝化对每一次基板处理循环执行。
本发明对于具有远程等离子体源而具有介电质壁的等离子体预清洗腔室是特别有用的,氢或氢与氦混合物在该远程等离子体源中远程地被产生成等离子体,离子从远程等离子体源被过滤以提供氢自由基的激化气体。这样与水蒸气钝化整合在一起的清洗过程可以有效地清洗多孔性与软的低k介电质。
质流控制器下游的约1托压力的水蒸气可以在室温下自动地从液态水被产生,且被真空抽吸加压至20托或更低。同样的水蒸气能够被用以在更低的压力下(例如小于1毫托的分压)供应水蒸气。
附图简述
图1为一层间互连结构或通孔的截面图。
图2为一清洗腔室的截面图,其中该清洗腔室使用远程等离子体源且可应用于本发明。
图3为一远程等离子体源的截面图。
图4为水蒸气供应系统的详细配管图。
图5为水蒸气钝化与远程等离子体源清洗的流程图。
图6为时序图,其显示出真空腔室中水蒸气分压在停止注入水蒸气之后会减低。
图7为柱形图,其示出利用水蒸气钝化来改善清洗效能。
优选实施方式的详细描述
美国专利申请11/334,803中描述的氢预清洗有利地配送清洗等离子体的水成分,藉以避免多孔性低k介电质的介电常数的劣化。然而,所相信的是,包括水蒸气的传统等离子体是对于氧化铝与其它介电质壁提供一些保护。此专利申请案的等离子体预清洗过程能够藉由尚未被激化成等离子体的水蒸气来钝化远程等离子体源与其它面对等离子体的壁而被改善,较佳地是在引发含氢但不含水的等离子体之前。
图2的横截面示图绘示的远程等离子体清洗腔室30包括真空处理腔室32,真空处理腔室32包括盖子34,盖子34可以绕着枢纽被开启且藉由真空泵送系统36被引动。基座38包括电阻式加热器46,电阻式加热器46选择性地被供有来自加热器电源48的电流以将晶圆40的温度升高至所希望的蚀刻或预清洗温度。
用于预清洗的过程气体为纯氢气(H2),或氢与氦(He)的组合物,其中该纯氢气是选择性地从氢气源50经由质流控制器52被供应,该组合物选择性地从氦气源54经由另一质流控制器56被供应。可以取代成所希望的氦比例的单一H2/He气体供应源。安装在盖子34上的远程等离子体源(remote plasma source,RPS)60接收来自供应线62的过程气体,且将其激化成等离子体。远程等离子体源60可以为各式各样的型式。图3示意性绘示的示例性RF感应式远程等离子体源64包括介电质管66,感应线圈68包覆围绕此介电质管66。RF电源70向线圈68供应电力,线圈68感应地将RF能量耦合至管64的钻孔内,以将在管66内流动的气体激化成为等离子体。在本发明中,氢气H2被激化成等离子体,该等离子体包括有带电荷离子H+与中性氢自由基H*。高级的远程等离子体源倾向于更复杂(例如依赖环面激化管),且其它型式的等离子体发生器是可能的。经激化的气体经由供应管72被输送至位于喷洒头42后方的气体岐管74。
请再参照图2,远程等离子体源位于真空腔室32的上游。离子过滤器沿着远程等离子体源60与岐管74之间的路径被设置,以去除任何氢离子H+,使得仅有中性氢自由基H*抵达晶圆40。离子过滤器包括两个磁铁76、77,其被设置成跨越供应管72彼此相对,以投射出跨越管内部的一磁场B而偏斜或捕获带电荷的氢离子。可移除的介电质管衬里78可被设置在供应管72内,且介电质腔室衬里79可以覆盖住岐管74的壁,以保护这些壁且减少氢自由基的再结合。在一实施例中,管衬里78是由氧化铝(Al2O3)所制成,且岐管衬里79与喷洒头72是由石英(SiO2)所制成的。因此,经激化的气体可以经由喷洒头41均匀地被输送至正被清洗的晶圆40。
在本发明的此实施例中,内含液态水池82的真空密封的瓶件80被安装在腔室盖子34上,并且质流控制器84测量来自瓶件80而进入远程等离子体源60的水蒸气。水的蒸气压在室温约20托,其远高于远程等离子体源60所操作的真空水平。因而,一旦瓶件80已经被往回抽吸,具有约20托压力的水蒸气就存在于瓶件80中液态水池82上方的头空间86。瓶件80直接地被安装在腔室盖子34上以减少配管长度,其中水蒸气可能会冷凝在配管的壁上;而气体源50、54与其质流控制器52、56典型地被安装在远程气体面板上而具有至腔室30与其远程等离子体源60的长配管88。液态水的单次注入已经被观察到能够持续超过100000次晶圆循环,其与下述观察一致:持续8秒的5sccm水蒸气的总量为0.66cc大气压水蒸气且因而约0.54×10-3cc液态水的示例性程序。即使如此,水位感应器有利地被包括在水瓶件80中。
水蒸气供应系统的更完整的实施例被绘示在第4图中。第一隔离阀90将质流控制器84从水瓶件80分离开,且第二隔离阀92将质流控制器84从连接至远程等离子体源60的供应线62分离开。此外,环绕着质流控制器84的旁流线94包括有第三隔离阀96。这些隔离阀对于往回抽吸水瓶件80(可以在腔室维护时将水瓶件80隔离开)与去除从管冷凝的水是有用的。
如图2所示,接收可读媒体102的计算机化控制器100控制泵送系统36、加热器电源48、远程等离子体源60、气体质流控制器52、56、84。可读媒体102可以为一磁盘或光盘(例如软盘片或CD片),可读媒体102包含有过程程序,控制器100根据此过程程序能控制腔室30中钝化与预清洗操作以及晶圆传送出入腔室30和隔离阀90、92、96操作的顺序。
根据本发明的一方面,少量水在等离子体引发之前被脉冲地注入远程等离子体源60与因而腔室30内。水蒸气在所有的壁上形成一薄的水覆层。在水蒸气注入停止且腔室被抽吸至次托范围的操作压力之后,水蒸气大量地蒸发。然而,化学吸收,尤其是化学吸收至金属或金属氧化物(例如氧化铝或石英),是在壁上形成一非常薄的水层。在“Modeling the pump-downof a reversibly adsorbed phase.I.Monolayer and submonolayer initialcoverage,”Journal of Vacuum Science and Technology A,vol.13(2),1995,第467-475页中,Redhead公开了在小于1毫托水蒸气压时薄膜由单层(monolayer)的水来形成。所相信的是,O-H键会形成在金属氧化物或金属的原生氧化物(native oxide)上。在“The chemistry of water onalumina surfaces:Reaction dynamics from first principles,”Science,vol.282 October 9,1998,265-268页中,Haas等人揭示了水分子会在氧化铝表面形成O-H键。可相信的是,O-H键可以避免离子氢从面对等离子体的壁去除,例如氧或金属(例如氧化铝中的铝)。最后,真空抽吸脱附且去除水单层。然而,我们的观察为,若水蒸气钝化在每一晶圆循环被执行,则保护在整个过程的等离子体阶段中延续。
若等离子体包含水成分(如同现有技术所实施的),同样的保护机制适用。然而,水等离子体会有害地影响低k介电质。虽然利用水蒸气来钝化会在晶圆上沉积一些水,预清洗通常被执行在刚从具有20托水蒸气的清洗室(clean room)环境被插入的晶圆,因而一些水涂层是不可避免的且应该与钝化持续时间典型地被脉冲注入腔室内的1托水蒸气比较。再者,标准的预清洗过程将晶圆加热至超过300℃。若加热仅在水蒸气的脉冲注入之后开始,且若等离子体引发在加热完成之后被延迟数秒,极少量的水在等离子体或氢自由基的存在下会残留在晶圆上。
图3所绘示的流程图显示在每一次晶圆循环所执行的等离子体清洗过程。虽然本发明可以在多晶圆批次腔室内被实施,较佳的清洗过程在单晶圆腔室(如图2所绘示者)内执行。在抽吸加压步骤110,腔室压力稍微不受控制,但是大致上低于6.5托。在部分步骤110的持续时间,分离预清洗腔室30与中央转送腔室的狭缝阀(slit valve)被开启,以允许机械手臂叶片移除腔室内一已经被预清洗的晶圆,且将其更换为一未被处理的晶圆。较佳地在狭缝阀被关闭之后,大量的氢与氦(例如各为2000sccm)被流入腔室以净化(purge)腔室。在唧筒加压步骤110结束,较佳地在狭缝阀被关闭之后,水蒸气钝化则被执行。例如,5sccm的水蒸气被流入腔室持续8秒。必须注意的是,伴随着大量的氢与氦,1托的腔室压力会产生约1毫托的水蒸气分压,因此小于10毫托的水蒸气分压是明显有效的。远程等离子体源没有被开启,因而净化气体或水蒸气没有被激化成等离子体,且其流动通过远程等离子体源进入腔室成为未经激化气体。
在加热步骤112,停置在基座上的未经处理的晶圆在操作持续时间被加热至维持在基座中的温度,例如250℃至350℃。加热器电源供应会被开启,以将基座加热至预定温度,例如350℃。在加热步骤112的持续时间,水蒸气供应被中断,且之后的过程循环不再继续供应水蒸气。氢流动持续,但是氦供应停止。腔室被维持在相对较高的6.5托压力,以促进加热与腔室的热平衡。在氩补充步骤114以预备等离子体引发时,大量的氩(例如1000sccm)被供应至腔室内,且持续供应大量氢。腔室压力维持在高的6.5托压力。在抽吸降压步骤116,腔室压力被减低至1托以预备等离子体引发。相同量的氩被供应,且少量的氢与选择性的氦被供应(若后者被用在清洗)。在引发步骤118,至远程等离子体源的RF供应最后被开启以引发气体(现在大部分为氩)成为等离子体。在过渡步骤120,腔室被抽吸降压至用于等离子体预清洗的较佳腔室压力,清洗量的氢与可能的氦被供应,且氩供应被部分地减少。
在等离子体引发之时,仅有单层的水会被预期涂覆于壁与晶圆上。如图6所示(其绘示水蒸气注入停止之后腔室内水蒸气分压),过量的水蒸气迅速地被唧筒抽出,且水蒸气分压被减低至小于3×10-6托。非常低的水分压可以确保最小的与蚀刻化学的干扰,其中该蚀刻化学涉及从软的低k介电质上清洗光阻与其它残余物。然而,残留在腔室壁上的暂时性的水单层似乎足够以保护面对等离子体的壁对抗氢等离子体。
参照图5,在等离子体蚀刻步骤122,晶圆被等离子体预清洗,其中该等离子体是依赖氢与选择性包含氦的还原化学。不需要氩以维持等离子体。已经发展出两个最佳化的预清洗程序。第一个程序包括在被供应仅400sccm氢的60毫托腔室环境内的30秒蚀刻。第二个程序包括在被供应400sccm氢与1200sccm氦的350毫托腔室环境内的30秒蚀刻。可以发展出其它蚀刻参数。然而,当蚀刻等离子体为还原化学(尤其是氢自由基化学)且不包含大量水或氧化剂(例如氧)时,水蒸气钝化似乎特别有用。等离子体蚀刻步骤122完成晶圆的预清洗,且远程等离子体源在步骤122结束被关闭。然后,操作返回到步骤110,以在另一晶圆上执行相同的过程。
明显的是,钝化的许多效果可以藉由在加热步骤112或可能氩补充步骤114或抽吸步骤116中而在引发步骤118之前将未激化的水蒸气供应至远程等离子体源被获得。已经观察到的是,只要H2O已经形成在抽吸加压步骤110中,在后续的步骤112、114、116中持续流动不会有明显的效果。
水蒸气钝化已经被观察到可以增加预清洗步骤的效能。如图7的柱形图所示,光阻蚀刻速率已经被观察到可以从没有钝化的约120nm/min增加至在引发氢等离子体之前具有水蒸气钝化的约200nm/min。再者,清洗的选择性已经被观察到从约30增加至高于90,其中选择性被定义为光阻蚀刻速率与正被清洗超低k介电质的蚀刻速率的比值。
钝化也已经被观察到可以增长远程等离子体源的寿命。在腔室已经被处理不超过1800片晶圆而远程等离子体源的总操作时间900分钟之后,若不藉由钝化,清洗过程会完全地偏移且光阻蚀刻速率会被减低至低于其原始值的30%。藉由水蒸气过程,清洗过程显示出对于所测试晶圆的数目没有劣化,更详细地说为10000片晶圆(其对应于5000分钟的远程等离子体源操作时间)。
在处理晶圆的另一相继试验中,不藉由任何钝化,微粒添加物的数目已经被观察到在0.12μm每片晶圆上成长至200添加物。之后,此试验被持续于相同的腔室与远程等离子体源中。添加物立即地下降至低于30,且在20片额外的晶圆中持续地下降至低于10。
水蒸气有利地被用在本发明中,因为其已经被应用在类似的腔室且成本低与更换容易。然而,气体可以被用来取代水,气体在所有的壁表面上(尤其是氧化铝表面)具有更高的化学吸收。这样的气体的示例为CH4、CO与CO2,其可以从其自身的气体槽(例如被装在气体面板上)被供应。当这些气体被用在钝化时,这些气体不被激化成等离子体,而是以其未激化气体型式经由远程等离子体源被供应或被供应至腔室内。
本发明对于延长远程等离子体源的寿命是特别有用的。然而,其也会钝化输送管、喷洒头、与等离子体反应器的其它具有壁而暴露至等离子体或自由基的部件而不管是介电质还是金属材质。
虽然本发明已经以在预清洗气体引发之前远程等离子体源的钝化而被描述,本发明不被如此地限制。远程等离子体源可以被用在去除整个光阻的主要灰化步骤。此外,用于其它型式的等离子体蚀刻且更特别地使用还原化学的蚀刻及无论是使用远程或原位等离子体的腔室是可受益自本发明。
本发明不被受限于处理硅晶圆,而可以被用于处理其它类型的基板(例如玻璃与其它介电质面板)。
例如,氢原子(无论是中性自由基或带电荷离子)对于在不同类型基板(包括金属与非金属)上腐蚀性产物的化学还原是有用的。例如,历史与考古的人工制品的金属表面能够用一束氢原子来清洗。这些氢原子常常在类似于用在半导体工业的远程等离子体源的等离子体发生器中产生。类似的氢等离子体发生器在氢激光器中被用做为来源。迄今为止,设备是昂贵的,这部分地因自等离子体发生器于氢等离子体持续存在时的短暂寿命。藉由将气体氢交替地供应至被供电的等离子体发生器与将水蒸气供应至未被供电的等离子体发生器,以暂时性地钝化等离子体发生器与下游输送系统的面对等离子体的壁,本发明可以容易地被应用于这样的氢等离子体发生器。如同前述数据,钝化持续时间可以实质上小于等离子体产生持续时间,因此总清洗产能没有被不利地影响。等离子体发生器的输出束可以在清洗与钝化步骤两者持续时间被导向基板,但是若水蒸气被导引离开正被处理的基板,或氢等离子体的末期使用者,一些应用可以受益。
因此,本发明同时改善了清洗过程且增加了腔室部件与构件的寿命,而对于产能、复杂性与系统及其操作的成本具有极小冲击。
Claims (22)
1.一种用以处理一等离子体处理腔室内一基板的钝化方法,其包含下列步骤:
将非激化状态的钝化气体注入至所述处理腔室内,其中所述钝化气体至少与水蒸气一样可以被大量化学吸收在所述处理腔室的壁上;以及
然后在所述处理腔室内于处理气体的等离子体中处理所述基板。
2.如权利要求1所述的钝化方法,其特征在于,所述钝化气体为水蒸气。
3.如权利要求1所述的钝化方法,其特征在于,所述钝化气体选自由CH4、CO与CO2所构成的组。
4.如权利要求1至3中任一项所述的钝化方法,其特征在于,所述等离子体为一还原等离子体。
5.如权利要求1至3中任一项所述的钝化方法,其特征在于,所述处理气体包含氢。
6.如权利要求1至3中任一项所述的钝化方法,其特征在于,所述处理气体选自由(1)氢与(2)氢及氦所构成的组。
7.如权利要求6所述的钝化方法,其特征在于,所述处理腔室包括远程等离子体源,所述远程等离子体源具有连接至所述处理腔室的内部的输出管,且水蒸气与处理气体被注入所述远程等离子体源内,其中所述远程等离子体源实质上没有在注入步骤持续时间被启动,而是在处理步骤持续时间被启动以将处理气体激化成等离子体。
8.如权利要求6所述的钝化方法,其特征在于,所述处理腔室还包括设置在所述远程等离子体源与所述腔室之间的离子过滤器,所述钝化气体与所述处理气体流动通过所述离子过滤器。
9.如权利要求2所述的钝化方法,其特征在于,所述处理腔室包括远程等离子体源,所述远程等离子体源具有连接至所述处理腔室的内部的输出管,且水蒸气与处理气体被注入所述远程等离子体源内,且其中所述远程等离子体源实质上不是在注入步骤持续时间被启动,而是在处理步骤持续时间被启动以将处理气体激化成等离子体。
10.如权利要求1至第3中任一项所述的钝化方法,其特征在于,所述处理步骤清洗介电层。
11.如权利要求10所述的钝化方法,其特征在于,所述处理步骤是从所述介电层去除残余物。
12.如权利要求10所述的钝化方法,其特征在于,所述介电层为多孔性,且具有低于3.9的介电常数。
13.如权利要求1至第3中任一项所述的钝化方法,还包括在注入步骤结束之后与在等离子体被激化以从所述腔室去除水蒸气之前,抽吸所述处理腔室。
14.一种等离子体处理方法,其包括对于多个连续被处理基板的每一者所执行的下列步骤:
将基板插入至等离子体处理腔室内,所述等离子体处理腔室包括支撑基板的基座、位于所述基座对面的气体喷洒头、与远程等离子体源,其中所述远程等离子体源具有其输出连接至位于所述喷洒头后方的岐管的供应管;
使水蒸气通过所述远程等离子体源而不将水蒸气激化成有效的等离子体;
使还原处理气体通过所述远程等离子体源且将其激化成等离子体;以及
然后熄灭所述等离子体且从所述等离子体处理腔室移出基板。
15.如权利要求14所述的方法,其特征在于,所述还原处理气体包含氢且实质上不包含水蒸气或氧。
16.如权利要求14所述的方法,其特征在于,所述基板包括介电层,所述介电层具有被蚀刻穿透其间的孔。
17.如权利要求16所述的方法,其特征在于,所述介电层具有低于3.9的介电常数。
18.一种钝化与处理方法,其包括下列步骤:
将未激化的水蒸气注入至真空处理腔室内,所述真空处理腔室包含要处理的基板;
抽吸所述真空处理腔室,以从所述真空处理腔室去除大量水蒸气;以及
然后将处理气体激化成等离子体,以处理位于所述真空处理腔室内的所述基板。
19.如权利要求18所述的方法,其特征在于,所述基板包含介电层,所述介电层具有低于3.9的介电常数,且所述处理气体包含氢且实质上不包含水与氧,且从基板上游的等离子体中过滤氢离子。
20.如权利要求18或19所述的方法,其特征在于,所述水蒸气与所述处理气体被流入远程等离子体源内,其中所述远程等离子体源将其输出输送至所述等离子体处理腔室,其中所述远程等离子体源实质上没有在注入步骤持续时间被启动,而是在激化步骤持续时间被启动。
21.一种操作氢等离子体源的方法,其包括重复一系列下列步骤:
在等离子体发生器没有被启动时使水蒸气通过所述等离子体发生器的第一步骤;以及
在所述等离子体发生器被启动时使氢气通过所述等离子体发生器的第二步骤。
22.如权利要求21所述的方法,其特征在于,所述第一步骤的持续时间小于所述第二步骤的持续时间。
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JP3816080B2 (ja) * | 2004-02-20 | 2006-08-30 | 松下電器産業株式会社 | プラズマ処理方法およびプラズマ処理装置 |
JP2005260060A (ja) * | 2004-03-12 | 2005-09-22 | Semiconductor Leading Edge Technologies Inc | レジスト除去装置及びレジスト除去方法、並びにそれを用いて製造した半導体装置 |
US20060042752A1 (en) * | 2004-08-30 | 2006-03-02 | Rueger Neal R | Plasma processing apparatuses and methods |
US7314835B2 (en) * | 2005-03-21 | 2008-01-01 | Tokyo Electron Limited | Plasma enhanced atomic layer deposition system and method |
JP4748581B2 (ja) * | 2005-12-20 | 2011-08-17 | 株式会社アルバック | 真空処理装置及び真空処理方法 |
-
2006
- 2006-02-10 US US11/351,676 patent/US7695567B2/en not_active Expired - Fee Related
-
2007
- 2007-01-30 WO PCT/US2007/002546 patent/WO2007094961A2/en active Application Filing
- 2007-01-30 KR KR1020087021271A patent/KR101364440B1/ko active IP Right Grant
- 2007-01-30 JP JP2008554270A patent/JP5260318B2/ja not_active Expired - Fee Related
- 2007-01-30 CN CN2007800050314A patent/CN101379213B/zh not_active Expired - Fee Related
- 2007-01-31 TW TW096103601A patent/TWI342241B/zh not_active IP Right Cessation
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CN103605267B (zh) * | 2013-10-23 | 2017-04-12 | 上海华力微电子有限公司 | 远程射频等离子体源的隔离结构 |
CN103605267A (zh) * | 2013-10-23 | 2014-02-26 | 上海华力微电子有限公司 | 远程射频等离子体源的隔离结构 |
US10916407B2 (en) | 2014-07-21 | 2021-02-09 | Applied Materials, Inc. | Conditioning remote plasma source for enhanced performance having repeatable etch and deposition rates |
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CN111101128A (zh) * | 2018-10-26 | 2020-05-05 | Asm Ip控股有限公司 | 用于预清洁和蚀刻装置的高温涂层及相关方法 |
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CN113422290A (zh) * | 2021-08-24 | 2021-09-21 | 度亘激光技术(苏州)有限公司 | 半导体结构钝化方法及设备 |
CN113422290B (zh) * | 2021-08-24 | 2024-05-14 | 度亘激光技术(苏州)有限公司 | 半导体结构钝化方法及设备 |
Also Published As
Publication number | Publication date |
---|---|
JP5260318B2 (ja) | 2013-08-14 |
US20070190266A1 (en) | 2007-08-16 |
US7695567B2 (en) | 2010-04-13 |
KR20080100220A (ko) | 2008-11-14 |
CN101379213B (zh) | 2013-03-20 |
TW200744765A (en) | 2007-12-16 |
KR101364440B1 (ko) | 2014-02-17 |
JP2009526399A (ja) | 2009-07-16 |
WO2007094961A2 (en) | 2007-08-23 |
WO2007094961A3 (en) | 2008-01-17 |
TWI342241B (en) | 2011-05-21 |
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