JP7221479B2 - ダイシング加工用製剤及び加工処理液 - Google Patents
ダイシング加工用製剤及び加工処理液 Download PDFInfo
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- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 9
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- H01L21/77—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate
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- C10M173/00—Lubricating compositions containing more than 10% water
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- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
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- C08L29/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers
- C08L29/02—Homopolymers or copolymers of unsaturated alcohols
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- C09D129/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Coating compositions based on hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Coating compositions based on derivatives of such polymers
- C09D129/02—Homopolymers or copolymers of unsaturated alcohols
- C09D129/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
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- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic System or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/304—Mechanical treatment, e.g. grinding, polishing, cutting
- H01L21/3043—Making grooves, e.g. cutting
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- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/683—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping
- H01L21/6835—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using temporarily an auxiliary support
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- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/02—Hydroxy compounds
- C10M2207/021—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms
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- C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
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- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/04—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to an alcohol or ester thereof; bound to an aldehyde, ketonic, ether, ketal or acetal radical
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- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/101—Condensation polymers of aldehydes or ketones and phenols, e.g. Also polyoxyalkylene ether derivatives thereof
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- C10N2040/00—Specified use or application for which the lubricating composition is intended
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- H01L2221/683—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping
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- H01L2221/68327—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping using temporarily an auxiliary support used during dicing or grinding
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Description
こうしたことが何に起因するものであるのか最初は良く判らなかったが、種々、研究を進めたところ次のようなことが判った。
また、ダイシング加工では多量の純水を掛け流しにしながら行われる為、多量の純水が必要で非常にコストがかかるし、さらに、水の使い過ぎによる地域住民の生活水への影響が懸念される場合もあった。
こうしたダイシング加工用製剤は、通常、純水で1万~10万倍に希釈した加工処理液として、ダイシング加工処理工程においてダイシングブレードがダイシングを行っている部分に吹付けるようにして使用する。
また、本ダイシング加工用製剤は高倍率に希釈しても充分に効果が得られるので、ダイシング加工後に使用済みの加工処理液を処理水再生設備に余分な負荷や手間を掛けることなく通水できる。その結果、再生処理水の他工程などでの再利用や廃水処理が効率的に行うことができるようになる。
このポリビニルアルコールは、ビニルアルコールの重合度が200~400程度のものであり、好ましくは250~350程度、より好ましくは280~320程度のものがよい。
また、このポリビニルアルコールは、部分的にケン化されている部分ケン化ポリビニルアルコールであって、そのケン化度は70~90モル%程度、好ましくは75~85モル%程度、より好ましくは78~82モル%程度にすると良い。
このポリオキシエチレンポリオキシプロピレングリコールエーテルは、ポリオキシエチレンとポリオキシプロピレングリコールの共重合体であるが、その重合数比が75:25~85:15程度であり、好ましくは80:20~83:17程度のものが良い。
そして、その数平均分子量は、10000~20000程度、好ましくは13000~18000程度、より好ましくは14000~16000程度のものが良い。
この希釈された処理液は、ウェーハをダイシングブレードによってダイシングしている部分に連続的に供給され、ダイシングによって発生したダイシング屑及びダイシングテープの粘着剤の微細片を洗い流すように除去するようになり、併せてダイシングブレードの摩擦に伴うウェーハの局部的な温度上昇も防ぐようになる。
部分ケン化ポリビニルアルコールとして、ビニルアルコールの重合度が300、ケン化度が80モル%、数平均分子量16000のものを使用。
ポリオキシエチレンポリオキシプロピレングリコールエーテルとして、ポリオキシエチレングリコールとポリオキシプロピレングリコールの重合体でその重合数比が83:17で、数平均分子量が16000であるものを使用。
表1に示すように上記部分ケン化ポリビニルアルコール(ポリマーAで表示)の1.33質量%とポリオキシエチレンポリオキシプロピレングリコールエーテル(界面活性剤Aで表示)の0.5質量%を純水98.17質量%(balance)に混合して溶かしダイシング加工用製剤を得た。
ポリビニルピロリドンとビニルアセテートのモル比を6:4とし、重量平均分子量を51000とする共重合体(ポリマーBで表示)を0.83質量%と、ポリオキシエチレンポリオキシプロピレングリコールエーテル(界面活性剤Aで表示)を0.83質量%とを純水98.34質量%(balance)に混合して溶かしダイシング加工用製剤を得た。
プルラン(マルトトリオースのα-1,6結合の多糖類)(ポリマーCで表示)を1.33質量%と、ポリオキシアルキレンアルキルエーテル(HLB14.7)(界面活性剤Bで表示)を0.33質量%とを純水98.34質量%(balance)に混合して溶かしダイシング加工用製剤を得た。
実施例1、比較例1~2の各加工用製剤を純水で1万倍に希釈した加工処理液を調製した。撮像素子を模してlow-k膜を形成した直径300mmのシリコンウェーハを東京精密社製ダイシング装置AD3000T-HCにセットし、加工処理液を15リットル/分の流量で切断部分へ供給しながらダイシング加工を行った。
ダイシング後、Camtek社製 ウェーハ外観検査装置Eagleおよびオリンパス社製測定顕微鏡で観察しながら、カット品位とウェーハ表面のダスト量の評価をした。カット品位は、同様に切断箇所のヤケ、カケ、チッピングの発生状態を比較した。
また、ウェーハ表面のダスト量については、チップ表面に存在するダスト数を集計後、比較例2のダスト量を1.00とする指数にして表記した。指数値が小さいほどダストが少なく、汚染されていないことを示している。
上記成分別ダイシング加工試験の結果を表1に示す。
カット品位は、ヤケ、カケ、チッピングの発生状態を評価したが実施例1比較例1~2ともそれらの発生は見られず優良(○)であり有意差は見られなかった。
ウェーハ表面のダスト量(指数)については、比較例2の1.00に比較して、比較例1のものは0.25であるが、実施例1のものはさらにダスト量が少なくなっていて0.20でありウェーハ表面のダスト量が少なく、汚染度が大幅に低くなっていることが判った。
実施例1、比較例1について、加工用製剤の希釈率を変えて上記と同様にダイシング加工試験を行った。
加工用製剤の希釈倍率は、上記した1万倍希釈液の他、6万倍希釈液、10万倍希釈液を用意して試験を行った。
上記希釈倍率別ダイシング加工試験の結果を表2に示す。
実施例1の1万倍希釈のものに対して、実施例1-2の6万倍希釈としたものではダスト量(指数)が0.20から0.14へと更に低下し、実施例1-3の10万倍希釈のものも0.18と低くなった。
一方、比較例1の1万倍希釈のものではダスト量(指数)が0.25であったものが、比較例1-2の6万倍希釈のものでは0.45と上昇し、比較例1-3の10万倍希釈のものでは0.69と更に高くなっている。
このように比較例1のものでは希釈率を上げるとダスト量が増えるのに対して、実施例1のものでは、希釈倍率を上げてもダスト量が殆ど変らず、むしろ少なくなっているので、高希釈倍率でも充分に使用することができる。
Claims (5)
- 重合度が200~400でありケン化度が75~85モル%である部分ケン化ポリビニルアルコール1.0~1.5質量%と、ポリオキシエチレンとポリオキシプロピレンの重合数比が75:25~85:15であり数平均分子量が10000~20000であるポリオキシエチレンポリオキシプロピレングリコールエーテルの0.4~0.6質量%を純水中に含有するダイシング加工用製剤。
- 上記部分ケン化ポリビニルアルコールは、その重合度が300であり、ケン化度が80モル%である請求項1に記載のダイシング加工用製剤。
- 上記ポリオキシエチレンポリオキシプロピレングリコールエーテルは、ポリオキシエチレンとポリオキシプロピレンの重合数比が83:17であり数平均分子量が15500である請求項1または2に記載のダイシング加工用製剤。
- 上記加工用製剤は更にフェニルグリコールを0.1質量%含有する請求項1~3のいずれかに記載のダイシング加工用製剤。
- 上記請求項1~4のいずれかに記載のダイシング加工用製剤を純水で1万~10万倍に希釈して使用するダイシング加工処理液。
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