JP2022056411A - 研磨パッドおよびこれを用いた半導体素子の製造方法 - Google Patents
研磨パッドおよびこれを用いた半導体素子の製造方法 Download PDFInfo
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- JP2022056411A JP2022056411A JP2021158412A JP2021158412A JP2022056411A JP 2022056411 A JP2022056411 A JP 2022056411A JP 2021158412 A JP2021158412 A JP 2021158412A JP 2021158412 A JP2021158412 A JP 2021158412A JP 2022056411 A JP2022056411 A JP 2022056411A
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-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
- B24B7/20—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground
- B24B7/22—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground for grinding inorganic material, e.g. stone, ceramics, porcelain
- B24B7/228—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground for grinding inorganic material, e.g. stone, ceramics, porcelain for grinding thin, brittle parts, e.g. semiconductors, wafers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B37/00—Lapping machines or devices; Accessories
- B24B37/11—Lapping tools
- B24B37/20—Lapping pads for working plane surfaces
- B24B37/24—Lapping pads for working plane surfaces characterised by the composition or properties of the pad materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- 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 potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table 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
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3105—After-treatment
- H01L21/31051—Planarisation of the insulating layers
- H01L21/31053—Planarisation of the insulating layers involving a dielectric removal step
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Weting (AREA)
Abstract
Description
(式1)
ここで、
前記加工組成物をゲル透過クロマトグラフィー(GPC)で分子量を測定したもので、
前記Mwは、前記解重合組成物の重量平均分子量であり、
前記Mnは、前記解重合組成物の数平均分子量であり、
前記Mpは、前記解重合組成物のpeak分子量である。
(式1)
ここで、
前記加工組成物をゲル透過クロマトグラフィー(GPC)で分子量を測定したもので、
前記Mwは、前記解重合組成物の重量平均分子量であり、
前記Mnは、前記解重合組成物の数平均分子量であり、
前記Mpは、前記解重合組成物のpeak分子量である。
(式1)
ここで、
前記加工組成物をゲル透過クロマトグラフィー(GPC)で分子量を測定したもので、
前記Mwは、前記解重合組成物の重量平均分子量であり、
前記Mnは、前記解重合組成物の数平均分子量であり、
前記Mpは、前記解重合組成物のpeak分子量である。
(式1)
ここで、
前記1gの研磨層を0.3モル濃度のKOH水溶液15mlに入れて、密閉された容器内で、150℃および48時間解重合し、前記解重合された組成物をゲル透過クロマトグラフィー(GPC)で分子量を測定したもので、
前記Mwは、前記解重合組成物の重量平均分子量であり、
前記Mnは、前記解重合組成物の数平均分子量であり、
前記Mpは、前記解重合組成物のpeak分子量である。
前記実施例1~2および前記比較例1~2のそれぞれの予備組成物に対して、前記予備組成物5mgをCDCl3に溶かし、室温で核磁気共鳴(NMR)装置(JEOL 500MHz、90゜pulse)を用いて13C-NMR分析を行った。
前記実施例1~2および前記比較例1~2のそれぞれの研磨層に対して、前記研磨層1gを0.3M濃度の水酸化ナトリウム(KOH)水溶液15mlに投入し、48mlの体積を有する密閉された容器内で、150℃の温度条件下で48時間反応させて加工組成物を製造した。前記加工組成物5mgをCDCl3に溶かし、室温で核磁気共鳴(NMR)装置(JEOL 500MHz、90゜pulse)を用いて13C-NMR分析を行った。
(1)硬度
前記実施例1~2および比較例1~2の研磨層を適用したそれぞれの研磨パッドを製造した後、下記のように研磨性能を評価した。
ジイソシアネート成分とポリオール成分とを下記表2の組成比で混合して4口フラスコに投入後、80℃で反応させて、ウレタン系プレポリマーを含む予備組成物を製造した。前記予備組成物中のイソシアネート基(NCO基)の含有量は9.5重量%に調節された。前記予備組成物に、硬化剤として4,4'-メチレンビス(2-クロロアニリン)(MOCA)を混合しかつ、前記予備組成物中のNCO基に対する前記MOCAのNH2基のモル比が0.92となるように混合した。また、前記予備組成物に、膨張性粒子である固相発泡剤(Akzonobel社)1.0重量部を混合した。前記予備組成物を横1,000mm、縦1,000mm、高さ3mmであり、100℃に予熱されたモールドに注入しかつ、10kg/minの吐出速度で注入した。次いで、前記予備組成物を110℃の温度条件下で後硬化反応して研磨層を製造した。
前記実施例および比較例の研磨層約1gが約0.3モル濃度のKOH水溶液15mlに投入された。以後、研磨層が混合されたKOH溶液は密閉された約48mlの体積を有する圧力容器に配置され、約150℃の温度で、約48時間、約3気圧の圧力で、解重合した。以後、前記解重合された組成物はメチレンクロライドによって抽出した。
注入速度(Flow rate):1ml/min in THF
注入量:100ul
カラム温度(Column Temp):40℃
検知器(Detector):RI
カラム(Column):TSKgel G1000HxL分子量Size5060
前記GPC測定値を用いて下記式1による値を計算した:
(式1)
ここで、
Mwは、解重合された組成物の重量平均分子量であり、
Mnは、解重合された組成物の数平均分子量であり、
Mpは、解重合された組成物のpeak分子量である。
(1)平均気孔サイズ
10:研磨層
11:第1面
12:第2面
13:溝
20:クッション層
30:第1接着層
40:第2接着層
50:予備組成物
60:硬化構造体
70:加工組成物
120:定盤
130:半導体基板
140:供給ノズル
150:研磨スラリー
160:研磨ヘッド
170:コンディショナ
Claims (10)
- 研磨層を含み、
前記研磨層1gを0.3M濃度の水酸化カリウム(KOH)水溶液に投入し、密閉された容器内で150℃の温度下に48時間反応させた加工組成物の核磁気共鳴(NMR)13Cスペクトルが15ppm~18ppmで現れる第1ピーク;9ppm~11ppmで現れる第2ピーク;および138ppm~143ppmで現れる第3ピークを含み、
前記第3ピークに対する前記第2ピークの面積比が5:1~10:1である、
研磨パッド。 - 前記第1ピークに対する前記第2ピークの面積比が10:1~10:5であり、
前記第1ピークに対する前記第3ピークの面積比が10:5~10:10である、
請求項1に記載の研磨パッド。 - 前記研磨層は、ウレタン系プレポリマーを含む予備組成物の硬化物を含み、
前記予備組成物の核磁気共鳴(NMR)13Cスペクトルが16ppm~20ppmでピーク位置(ppm)値の大きい順に第4ピークおよび第5ピークを示し、
前記第4ピークに対する前記第5ピークの面積比が1:1~10:1であり、
前記予備組成物は、イソシアネート化合物およびポリオール化合物の反応物を含み、
前記イソシアネート化合物は、芳香族ジイソシアネート化合物を含み、
前記ポリオール化合物は、重量平均分子量(Mw)が約100g/mol以上、約300g/mol未満の低分子量ポリオールと、重量平均分子量(Mw)が約300g/mol以上、約1800g/mol以下の高分子量ポリオールとを含み、
前記芳香族イソシアネート化合物は、2,4-トルエンジイソシアネート(2,4-TDI)を含み、
前記予備組成物は、一末端ウレタン反応した2,4-TDIに由来する第1単位構造、両末端ウレタン反応した2,4-TDIに由来する第2単位構造の少なくとも1つを含むウレタン系プレポリマーを含み、
前記予備組成物のイソシアネート基の含有量は、5重量%~11重量%である、
請求項1に記載の研磨パッド。 - 前記加工組成物は、数平均分子量(Mn)が1,800g/mol~2,800g/molであり、
重量平均分子量(Mw)が2,000g/mol~3,000g/molであり、
peak分子量(Mp)が2,000g/mol~3,000g/molであり、
分散度(PDI、Mw/Mn)が1~1.2である、
請求項1に記載の研磨パッド。 - i)イソシアネート化合物およびポリオール化合物の反応物を含む予備組成物を製造するステップと、
ii)前記予備組成物、発泡剤、および硬化剤を含む研磨層製造用組成物を製造するステップと、
iii)前記研磨層製造用組成物を硬化して研磨層を製造するステップと、を含み、
前記研磨層は、1gを0.3M濃度の水酸化カリウム(KOH)水溶液に投入し、密閉された容器内で150℃の温度下に48時間反応させた加工組成物の核磁気共鳴(NMR)13Cスペクトルが15ppm~18ppmで現れる第1ピーク;9ppm~11ppmで現れる第2ピーク;および138ppm~143ppmで現れる第3ピークを含み、
前記第3ピークに対する前記第2ピークの面積比が5:1~10:1である、
研磨パッドの製造方法。 - 前記第1ピークに対する前記第2ピークの面積比が10:1~10:5であり、
前記第1ピークに対する前記第3ピークの面積比が10:5~10:10であり、
前記予備組成物の核磁気共鳴(NMR)13Cスペクトルが16ppm~20ppmでピーク位置(ppm)値の大きい順に第4ピークおよび第5ピークを示し、
前記第4ピークに対する前記第5ピークの面積比が1:1~10:1である、
請求項6に記載の研磨パッドの製造方法。 - 研磨層を含む研磨パッドを提供するステップと、
前記研磨層の研磨面に研磨対象の被研磨面が当接するように配置した後、互いに相対回転させながら前記研磨対象を研磨させるステップと、を含み、
前記研磨対象は、半導体基板を含み、
前記研磨層は、その1gを0.3M濃度の水酸化カリウム(KOH)水溶液に投入し、密閉された容器内で150℃の温度下に48時間反応させた加工組成物の核磁気共鳴(NMR)13Cスペクトルが15ppm~18ppmで現れる第1ピーク;9ppm~11ppmで現れる第2ピーク;および138ppm~143ppmで現れる第3ピークを含み、
前記第3ピークに対する前記第2ピークの面積比が5:1~10:1である、
半導体素子の製造方法。
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