OutleeksadFurore
雷红
(上海大学纳米科学与技术研究中心。上海200444)
摘要:化学机械抛光(CMP)技术是目前广泛采用的几乎唯一的高精度全局平面化技术。抛光后表面的清洗质量直接关系到CMP技术水平的高低。介绍了各种机械、物理及化学清洗方法与工艺技术优缺点,指出了清洗荆、清洗方式是CMP后清洗技术中的关捷要素。综述了CMP后清洗技术的发展现状,分析了CMP后清洗存在的问题,并对其发展趋势进行了展望。
关键词:化学机械抛光;原子级精度表面;清洗技术
中圈分类号:TN305文献标识码:A文章编号:1003.353X(2008)05-0369-05
AdvancesinPost-CMPCleaningTechnology
LeiHong
(mJearchCentero/Nano-&/en傀andNano-Technology,s^喇‰毋,sJltuts,ha/200444,蕊妇)Abstract:Chemicalmechanicalpolishing(CMP)istheonlyhighprecisionandwidelyusedfinishingmachiningtechnologytodateforsurfaceglobalplanarlzation.Post—CMPcleaningisoneofthekeyfactorsinfluencingtheCMPperformances.’Iheadvantagesanddisadvantagesofvariousmechanical,physical,chemicalcleaningmethods.andprocessareintroduced。Detergentandcleaningmethod眦thetwomain
elementsduringpost·CMP
cleaning.111eprogressandproblemsofpost-CMP
cleaningarereviewed。and
the
trendofpost-CMPcleaningisoutlined.
Keywords:CMP;atom-scalepinionsurface;cle觚iIlgtechnologyEEACC:2550E
0引言
目前因抛光后表面清洗不干净引起的电子器件产品合格率降低,占次品率的50%左右,清洗质量的高低已严重影响到先进电子产品的性能、可靠性与稳定性。工艺中si片表面吸附的微粒、有机和无机粘污会破坏极薄氧化层的完整性,导致微结构缺陷,引起低击穿、管道击穿、软击穿、漏电流增加以及芯片短路等问题…1。计算机硬盘技术中,随着硬盘存储密度的快速上升,磁头的飞行高度已降低到10姗以下L2J。原子级表面粗糙度(原子直径小于0.3nm)、无微观缺陷、洁净的高精表面已成为高技术电子产品制造中的共同要求,也是关系其性能的关键因素。
基金项目:国家自然科学基金资助项目(60773080);上海市教委第五期重点学科资助项目(j50102)
May2008
目前一般采用CMP技术进行片子表面的高精
度全局平坦化。由于抛光后新鲜表面活性高,以及CMP抛光液中大量使用高浓度的纳米磨粒(如纳米Si02、纳米AIO粒子)、多种化学品等因素,工件表面极易吸附纳米颗粒等污染物,导致CMP后清洗极其困难。集成电路技术中,对0.35pm及以下的CMOS工艺,要求后清洗提供的片子上0.12弘m以上附着物不多于500个/m2,各种金属杂质如Fe、cu、cr等控制在目前分子分析技术的检测极限以下(约为1010原子/cm2)等【3】。下一代计算机垂直存储技术对硬盘基片表面洁净度的具体要
求为:表面残留颗粒(大于200nm)不超过15个/片,表面残留阴离子和阳离子分别不超过1∥片,残留有机物(硅油、胺)小于1ng/cm2。并且清洗后不能造成新的损伤与污染物残留。CMP后超光滑表面的超精密清洗技术已成为超精密加工技术中急待解决的关键性难题之一。
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雷红:CMP后清洗技术的研究进展
[6]ZHANGF,BUSNMNAAA。AHMADIG.Particleadhesionandremovalinchemicalmechanicalpolishingandpost-CMPcleaniIlg[J].JoftheElectrochemicalSociety,1999,146(7):2665.2669.
[7]HMJM,JAONBY,LEEC.Drycl朗ningformetalliccontaminantsremovaltheseconddesmngprocessaftertheCMPprocess[J].MaterialsChemistryandPhysics,2001,70(2):129—136。
[8]MOUMENN.Removalofsubmicmmetrealuminaparticlesfromsiliconoxidesubstrates[J].蛐eEngineering,2001,17(5):422铋.
【9]唧I艘0ssIANA,MUSTAPIIAL.Effectoftoolkinematics,brushpressureandcie赫SfluidpHcoefficientoffrictionandtribologyofpost-CMPPVAbrushscrubbingprocesses[J].MatorlalsResearchSociety,2003,767:209-215.
[10]ZHANGG,BURDICKG,DMF,eta1.Assessmentofpost-CMPcleaningmechanisms瑚iI唱statistically-designed
experiments[J]..11lillSolidfilms,1998,332(1):379·384.[11】TAYLORJ,BUSNAINAA.1yieldenhancementdⅡ∞出埘ld髓曲砌碍thepmicleadhesionandremovalmechanismsin
cMPandpost-CMPcl啪iIIgprocess[c】//ProcofIEEEhlt
SympSemiconductorManufacturing.Boston,MA,USA,
2000:14_17.
[12]BUSNAINAAA,LINH,MOUMENN,eta1.Particleadhesionandremovalmechanismsinpost-CMPcleaningprocesses[J].
IEEETransonSemiconductorManufacturing,2002,15(4):
37缸382.
[13]LIANGH,ESTRAGNATE,LEEJ,eta1.Mechanismsofpost-CMPcleaning[J].MaterialsResearchSociety,2001,671:
M7.4.1-M7.4.8.
[14]MOUMENN.Removalofsubmicmmetrealuminaparticlesfromsiliconoxidesubstrates[J].Sur缸eE|lgh蝌i鸣,2001,
17(5):422-424.
[15]BUSNAINAAA.Pbet-CMPelemnS
mmg籼sticstresmms[J].JofElectronicMaterials,1998,27(10):1095-1098.
[16]BUSNAINAAA,PARKJG,LEEJM,eta1.Lasershockcleaningofinorganicmicroandnanoscaleparticles[C]//
ProcofIEEEImSympSemiconductorManufacturing.
Boston,MA,UsA,2003:41-45.
[17]DEVARAPALL[VK.Poet-chmdcalmechanicalpolishingd鲫iIIgofsiliconwaferswithlaser-inducedplasma[J].JofAdhesion
ScienceandTechnology,2004,18(7):779·794.
[18]MCAVEYK.SC.1clean
improvementsforpost
ST[CMP[J].SolidStatePhenomena,2000,76-77:29l-294.
[19]ABBADIEACRESCENTEF。s色M琶R队MN.AdvancedwetcleBIIingpost-CMP---applicationtoreclaimwafers[J].Jofthe
ElectrochemicalSociety,2004,151(1):C57-G66.
[20]PARKH.Newpo醴-tmmentforchemical-mechanicalpolishingprocessofveryhrge-scahintegratedcircuittungstenvias—May2008
[J].JJAP,Pt1,1998,37(7):3871.3877.
[21]JOLLEYM.Appfieatious0fmtmmethylammoniniumhydroxide(TMAH)asposttungstenCMPcleaningmixture[J].SolidStatePhenomena,1999,65-66:105-108.
[22]FYENW,VOSR,TEERLINCKI,da1.Criticali暇蛸inpostCuCMPd朗面唱[C]//Prec0fIEEEIntSyrupSemiconductorM诎咄.Tokyo,Japan,2(}00:415-418.
[23]BEVERINAA,BERNARDH,PALLEAUJ,da1.CopperphotocorrosionphenomenonduringpostCMPcl明IIi】唱[J].
ElectmehemicalandSolid-SateLea。2000,3(3):156-1鼹.
[24]LIUYL,zHANGKL,WANGF,et,11.Studytheele,miIIgofsiliconafterCMPinULSI[J].MicroelectmnicEngineering,2003,66(1.4):433-437.
[25]PANTM.ComparisonofnovelcleaniIlgsolutionswithvariouschelatin8agentsforpost-CMPcleaningPOly-Sifilm[J].
ⅢEETrausSemiconductorManufacturing,2001,14(4):
365.371.
[26】曹宝成,于新好,马瑾,等.用含表面活性剂和螯合剂的清洗液清洗Si片的研究[J].半导体学报,2001,22(9):.1226-1229.
[27]PI-m_LIPOSSIANA,MUSTAPHAL.能蹦09icaleharactenmtionofPOst-CMPbrushscrubbing[J].SolidStatePhenomena,2003,92:275-2吕0.
[28]LIUY,踟{ROB,lI眦咖A,eta1.AFMmeasurementofadhesionbetweenactualCMPslurrypaniclesandvarioussubstrates[J].MaterialResearchSociety,2005,867:183—188.
[29]BURTOVYYR,LIUY,ZDYRKOB.AFMme4mm'世mentofadhesionbet’嘞CMPslurryparticlesandcopperCJ].
MaterialResearchSociety,2006,914:213—218.
[30]HONGYK.Theeffectofadditivesinpost-CuCMPcleanillgparticleadhesionand
removal[J].JoftheElectrochemicalSociety,2004,151(11):G756-G761.
[31]DEDYN.Nano-portieleintersc60n蛐ehemical-mecl舶micalpolishing[C]//ProeofWTC2005.Washington,DC,USA,2005,389·390.
[32]叶占江,桑建新,刘玉岭,等.表面活性剂对硅单晶片表面吸附颗粒的作用[J].半导体技术,2001,26(7):59—61.[33]LIUCW,DAIBT,YEHCF.Postelectingofchemicalmechanicalpolishingprocess[J].Applied
SI幽Science,
1996,92:176—179.
(收稿日期:2007.12.04)
作者简介:
■红(19鹋一),男,博士,副研究员,主要研
究方向为CMP技术。
SemiconductorTechnologyVot.33No.5
373
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CMP后清洗技术的研究进展
作者:雷红, Lei Hong
作者单位:上海大学纳米科学与技术研究中心,上海,200444
刊名:
半导体技术
英文刊名:SEMICONDUCTOR TECHNOLOGY
年,卷(期):2008,33(5)
被引用次数:2次
1.LIU Y L;ZHANG K L;WANG F Study on the cleaning of silicon after CMP in ULSI[外文期刊] 2003(1-4)
2.MOUMEN N Removal of submicrometre alumina particles from silicon oxide substrates[外文期刊]
2001(05)
3.HM J M;JAON B Y;LEE C Dry cleaning for metallic covtamlnAnts removal as the second desmng process after the CMP process[外文期刊] 2001(02)
4.ZHANG F;BUSNMNA A A;AHMADI G Particle adhesion and removal in chemical mechanical polishing and post-CMP cleaning[外文期刊] 1999(07)
5.BEVERINA A;BERNARD H;PALLEAU J Copper photoeorresion phenomenon during post CMP cleaning[外文期刊] 2000(03)
6.叶占江;桑建新;刘玉岭表面活性剂对硅单晶片表面吸附颗粒的作用[期刊论文]-半导体技术 2001(07)
7.DEDY N Nano-portiele intersction during chemical-mechanical polishing 2005
8.HONG Y K The effect of additives in post-Cu CMP cleaning on particle adhesion and removal[外文期刊] 2004(11)
9.BURTOVYY R;LIU Y;ZDYRKO B AFM measurement of adhesion between CMP slurry particles and copper 2006
10.LIU Y;ZDYRRO B;TREGUB A AFM measurement of adhesion between actual CMP slurry particles and various substrates 2005
11.PHILLIPOSSIAN A;MUSTAPHA L Tribological characterization of post-CMP brush scrubbing[外文期刊] 2003
12.曹宝成;于新好;马瑾用含表面活性剂和螯合剂的清洗液清洗Si片的研究[期刊论文]-半导体学报 2001(09)
13.PAN T M Comparison of novel cleaning solutions with various chelating agents for post-CMP cleaning on pcly-Si film[外文期刊] 2001(04)
14.MOUMEN N Removal of submicmmetre alumina particles from silicon oxide substmtes[外文期刊]
2001(05)
15.LIANG H;ESTRAGNAT E;LEE J Mechanisms of postCMP cleaning 2001
16.PHILLIPOSSIAN A;MUSTAPHA L Effect of tool kinematics,brush pressure and cleaning fluid pH on coefficient of friction and trlbology of post-CMP PVA brush scrubbing pmcesess 2003
17.BUSNAINA A A;LIN H;MOUMEN N Particle adhesion and removal mechanisms in post-CMP cleaning processes[外文期刊] 2002(04)
18.TAYLOR J;BUSNAINA A Yield enhancement through understanding the particle adhesion and removal mechanisms in CMP and post-CMP cleaning process 2000
19.ZHANG G;BURDICK G;DM F Assessment of postCMP cleaning mechanisms using statistically-desisned
experiments[外文期刊] 1998(01)
20.FYEN W;LAUERHAAS J;VOS R Non-contact post Cu CMP cleaning using megaconic energy[外文期刊] 2000
21.王宇;蔡亚梅;滕霖超光滑表面清洗技术现状及发展趋势[期刊论文]-航空精密制造技术 2003(02)
22.HAHN P O The 300 mm Si wafer-a cost and teclmolosy challenge[外文期刊] 2001(1-2)
23.LIE C W;DAI B T;YEH C F Post cleaning of chemical mechanical polishing process[外文期刊] 1996(0)
24.雷源忠;丁汉;雒建斌计算机制造中的重要科学技术问题[期刊论文]-机械工程学报 2002(11)
25.FYEN W;VOS R;TEERLINCK I Critical issues in post Cu CMP cleaning 2000
26.JOLLEY M Appfications of tetramethylammoninium hydroxide (TMAH)as a post tungsten CMP cleaning mixture[外文期刊] 1999
27.PARK H New post-treatment for chemical-mechanical polishing process of very large-scale integrated circuit tungsten vias 1998(07)
28.ABBADIE A;CRESCENTE F;S(E)M(E)RIA M N Advanced wet cleaning post-CMP-application to reclaim wafers 2004(01)
29.MCAVEYK SC-1 clean improvements for post STI CMP[外文期刊] 2000
30.DEVARAPAILI V K Post-chemical mechanical polishing deaning of silicon wafers with laser-induced plasma[外文期刊] 2004(07)
31.BUSNAINA A A;PARK J G;LEE J M Laser shock cleaning of inorganic micro and nanoscale particles 2003
32.BUSNAINA A A Post-CMP cleaning using acoustic streaming[外文期刊] 1998(10)
33.曹阳;刘钠;刘玉岭硅单晶片镜面吸附物吸附状态的研究[期刊论文]-稀有金属 1999(02)
1.雷红.司马能.袁国兴.屠锡富.布乃敬.藏松涛计算机硬盘基片的化学机械清洗技术研究[期刊论文]-半导体技术2010(8)
2.雷红.司马能.屠锡富.布乃敬.严琼林.吴鑫氧化硅/氧化铁复合磨粒用于硬盘基片的抛光研究[期刊论文]-摩擦学学报 2010(3)
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