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JP2000091291A - Washing method of silicon wafer - Google Patents

Washing method of silicon wafer

Info

Publication number
JP2000091291A
JP2000091291A JP10258548A JP25854898A JP2000091291A JP 2000091291 A JP2000091291 A JP 2000091291A JP 10258548 A JP10258548 A JP 10258548A JP 25854898 A JP25854898 A JP 25854898A JP 2000091291 A JP2000091291 A JP 2000091291A
Authority
JP
Japan
Prior art keywords
silicon wafer
cleaning
ozone
oxide film
ultrapure water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
JP10258548A
Other languages
Japanese (ja)
Inventor
Masanori Sato
正徳 佐藤
Yasuhiro Suzuki
保浩 鈴木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MEMC Japan Ltd
Original Assignee
MEMC Japan Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MEMC Japan Ltd filed Critical MEMC Japan Ltd
Priority to JP10258548A priority Critical patent/JP2000091291A/en
Publication of JP2000091291A publication Critical patent/JP2000091291A/en
Withdrawn legal-status Critical Current

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  • Cleaning By Liquid Or Steam (AREA)
  • Cleaning Or Drying Semiconductors (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a washing method of a silicon wafer which can improve both oxide film breakdown strength characteristic and cleanliness of a silicon wafer surface at once. SOLUTION: After a silicon wafer is washed by ozone-added ultra-pure water and a silicon wafer is washed by NH4OH-H2O2 mixed solution of 30 to 70 deg.C, a silicon wafer is further washed by ozone-added ultra-pure water and a silicon wafer is washed by NH4OH-H2O2-H2O mixed solution of 40 to 80 deg.C. Both oxide film breakdown strength characteristic and cleanliness of a silicon wafer surface can be improved at once by combining ozone-added ultra-pure water washing which is excellent in decomposition/removal of organic compound and removal of transition metal impurities (especially, Cu) and washing by NH4OH-H2O2-H2O mixed solution which is excellent in washing effect.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】 本発明は、シリコンウエハ
表面の清浄化と酸化膜耐圧特性を改善するためのシリコ
ンウエハの洗浄方法に関する。
[0001] 1. Field of the Invention [0002] The present invention relates to a method of cleaning a silicon wafer for cleaning the surface of the silicon wafer and improving the withstand voltage characteristics of an oxide film.

【0002】[0002]

【従来の技術】 近年、半導体デバイスの高集積化に伴
うチップサイズの大型化が進むに従って、シリコンウエ
ハ表面の清浄度に加えて、大面積にわたって耐圧不良の
ない電気的絶縁性の優れた高品質の酸化膜を形成するこ
とが要求されている。このとき、シリコンウエハ表面上
の有機化合物を除去することと、遷移金属不純物(特
に、Cu)の除去および再付着の防止することが、半導
体デバイスの電気的特性を向上させる上で必要不可欠で
ある。
2. Description of the Related Art In recent years, as the chip size has increased with the increase in the degree of integration of semiconductor devices, in addition to the cleanliness of the silicon wafer surface, high quality with excellent electrical insulation properties without a breakdown voltage over a large area. It is required to form an oxide film. At this time, it is indispensable to remove the organic compound on the surface of the silicon wafer and to remove transition metal impurities (especially, Cu) and to prevent reattachment, in order to improve the electrical characteristics of the semiconductor device. .

【0003】 このため、従来から用いられてきたHF
−H22混合液(DHF)、H2SO4−H22混合液
(SPM)、HCl−H22混合液(HPM)等による
洗浄により、上記の目的を達成しようと試みられてき
た。しかしながら、上記の方法では、シリコンウエハ表
面上の有機化合物を除去することや、遷移金属不純物
(特に、Cu)を十分に除去することが難しいという問
題点があった。
[0003] For this reason, the conventionally used HF
-H 2 O 2 mixture (DHF), by washing with H 2 SO 4 -H 2 O 2 mixture (SPM), HCl-H 2 O 2 mixture (HPM) such as, attempts to achieve the above I have been. However, the above method has a problem that it is difficult to remove the organic compound on the surface of the silicon wafer and to sufficiently remove transition metal impurities (particularly, Cu).

【0004】[0004]

【発明が解決しようとする課題】 本発明は上記した従
来の課題に鑑みてなされたものであり、その目的とする
ところは、有機化合物の分解・除去及び遷移金属不純物
(特に、Cu)の除去に優れたオゾン添加超純水洗浄
と、洗浄効果に優れたNH4OH−H22−H2O混合液
による洗浄を組み合わせることにより、シリコンウエハ
表面の酸化膜耐圧特性と清浄度の両方を一挙に改善する
ことができるシリコンウエハの洗浄方法を提供するもの
である。
SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and has as its object to decompose and remove organic compounds and remove transition metal impurities (particularly, Cu). excellent ozone added ultrapure water cleaning were, by combining the washing with an excellent cleaning effect NH 4 OH-H 2 O 2 -H 2 O mixture, both the oxide dielectric breakdown voltage characteristics and the cleanliness of the surface of the silicon wafer It is intended to provide a method for cleaning a silicon wafer, which can improve all at once.

【0005】[0005]

【課題を解決するための手段】 すなわち、本発明によ
れば、シリコンウエハ表面の清浄化と酸化膜耐圧特性を
改善するためのシリコンウエハの洗浄方法であって、
(a)オゾン添加超純水でシリコンウエハを洗浄し、
(b)30〜70℃のNH4OH−H22−H2O混合液
でシリコンウエハを洗浄した後、(c)更に、オゾン添
加超純水でシリコンウエハを洗浄し、(d)40〜80
℃のNH4OH−H22−H2O混合液でシリコンウエハ
を洗浄することを特徴とするシリコンウエハの洗浄方法
が提供される。
That is, according to the present invention, there is provided a silicon wafer cleaning method for cleaning a silicon wafer surface and improving an oxide film breakdown voltage characteristic,
(A) cleaning the silicon wafer with ozone-added ultrapure water,
(B) After cleaning the silicon wafer with a mixed solution of NH 4 OH—H 2 O 2 —H 2 O at 30-70 ° C., (c) further cleaning the silicon wafer with ozone-added ultrapure water; 40-80
° C. NH 4 cleaning method of silicon wafers, characterized by washing the silicon wafer with OH-H 2 O 2 -H 2 O mixture are provided.

【0006】 また、本発明においては、オゾン添加超
純水のオゾン濃度が、5〜20ppmであり、NH4
H−H22−H2O混合液のNH4OH:H22:H2
(体積比)が、1:5:100〜1:10:100であ
ることが好ましい。
[0006] In the present invention, the ozone concentration of the ozonated ultrapure water, a 5 to 20 ppm, NH 4 O
NH 4 OH in H-H 2 O 2 -H 2 O mixture: H 2 O 2: H 2 O
(Volume ratio) is preferably from 1: 5: 100 to 1: 10: 100.

【0007】 更に、本発明においては、工程(b)及
び工程(d)の後に、シリコンウエハをリンスすること
が好ましい。
Further, in the present invention, it is preferable to rinse the silicon wafer after the steps (b) and (d).

【0008】[0008]

【発明の実施の形態】 本発明のシリコンウエハの洗浄
方法は、シリコンウエハ表面の清浄化と酸化膜耐圧特性
を改善するためのシリコンウエハの洗浄方法であって、
オゾン添加超純水でシリコンウエハを洗浄し、30〜7
0℃のNH4OH−H22−H2O混合液でシリコンウエ
ハを洗浄した後、更に、オゾン添加超純水でシリコンウ
エハを洗浄し、40〜80℃のNH4OH−H22−H2
O混合液でシリコンウエハを洗浄するものである。
BEST MODE FOR CARRYING OUT THE INVENTION A silicon wafer cleaning method of the present invention is a silicon wafer cleaning method for cleaning a silicon wafer surface and improving an oxide film breakdown voltage characteristic,
Clean the silicon wafer with ozone-added ultrapure water,
After cleaning the silicon wafer with a mixed solution of NH 4 OH—H 2 O 2 —H 2 O at 0 ° C., the silicon wafer is further cleaned with ozone-added ultrapure water, and the NH 4 OH—H 2 at 40 to 80 ° C. O 2 -H 2
This is for cleaning a silicon wafer with an O mixed solution.

【0009】 上記のようなシリコンウエハの洗浄方法
は、有機化合物の分解・除去及び遷移金属不純物(特
に、Cu)の除去に優れたオゾン添加超純水洗浄と、洗
浄効果に優れたNH4OH−H22−H2O混合液による
洗浄を組み合わせることにより、シリコンウエハ表面の
酸化膜耐圧特性と清浄度の両方を一挙に改善することが
できる。
The method for cleaning a silicon wafer as described above includes cleaning with ozone-added ultrapure water excellent in decomposing and removing organic compounds and removing transition metal impurities (particularly Cu), and NH 4 OH excellent in cleaning effect. By combining the cleaning with the -H 2 O 2 -H 2 O mixed solution, both the oxide film breakdown voltage characteristics and the cleanliness of the silicon wafer surface can be improved at once.

【0010】 次に、本発明のシリコンウエハの洗浄方
法について詳細に説明する。本発明のシリコンウエハの
洗浄方法の主な特徴は、シリコンウエハをオゾン添加超
純水で洗浄した後、NH4OH−H22−H2O混合液
(APM[SC−1])で洗浄する工程を少なくとも2
回繰り返すことにある。これにより、1回目の洗浄工程
で、予めシリコンウエハ表面の遷移金属不純物(特に、
Cu)、有機汚染物及びパーティクルをある程度除去し
た後、2回目の洗浄工程で、1回目の洗浄工程で除去し
きれなかったシリコンウエハ表面の遷移金属不純物(特
に、Cu)、有機汚染物及びパーティクルを確実に除去
することができるため、前記洗浄工程を1回行う時と比
較して、シリコンウエハ表面の酸化膜耐圧特性と清浄度
の両方を大幅に改善することができる。
Next, the method for cleaning a silicon wafer of the present invention will be described in detail. Key features of the silicon wafer cleaning method of the present invention, after cleaning the silicon wafer with ozone added ultrapure water, NH 4 OH-H 2 O 2 -H 2 O mixture (APM [SC-1]) At least two washing steps
To repeat times. Thereby, in the first cleaning step, transition metal impurities (particularly,
After removing Cu), organic contaminants and particles to some extent, in the second cleaning step, transition metal impurities (especially Cu), organic contaminants and particles on the silicon wafer surface that could not be completely removed in the first cleaning step Can be surely removed, so that both the oxide film breakdown voltage characteristic and the cleanliness of the silicon wafer surface can be significantly improved as compared with the case where the cleaning step is performed once.

【0011】 このとき、本発明のシリコンウエハの洗
浄方法は、オゾン添加超純水でシリコンウエハを洗浄す
ることが重要である。これにより、従来の方法と比較し
て、有機化合物及び遷移金属不純物(特に、Cu)を確
実に除去できることができる。
At this time, in the method for cleaning a silicon wafer of the present invention, it is important to clean the silicon wafer with ozone-added ultrapure water. Thereby, the organic compound and the transition metal impurities (particularly, Cu) can be surely removed as compared with the conventional method.

【0012】 次に、オゾン添加超純水洗浄によるシリ
コンウエハ表面の遷移金属不純物の付着防止メカニズム
について、Cuを例にとって説明する。オゾンが超純水
中に存在しないときには、Cu2+イオンは、シリコンウ
エハ表面のSiから電子を受け取り付着するが、オゾン
を添加すると、オゾンがCu2+イオンより優先的にSi
から電子を奪うため、シリコンウエハ表面のSiはオゾ
ンにより酸化され、CuがCu2+イオンとして超純水中
に残り、Siとの付着を防止することができる。また、
仮にシリコンウエハ表面のSiにCuが付着した場合で
あっても、酸化剤であるオゾンが、Cuから電子を奪
い、イオン化することにより、Cu2+イオンとして超純
水中に再溶解させることができる。更に、シリコンウエ
ハ表面のSiが酸化され、シリコンウエハ表面が酸化膜
で覆われていくに従い、Cu2+イオンとSiとの電子の
交換が起こり難くなるため、シリコンウエハ表面上への
Cuの付着を更に抑制することができる。
Next, a mechanism of preventing transition metal impurities from adhering to the silicon wafer surface by cleaning with ozone-added ultrapure water will be described using Cu as an example. When ozone is not present in ultrapure water, Cu 2+ ions receive and attach electrons from Si on the surface of the silicon wafer. However, when ozone is added, ozone is given priority over Cu 2+ ions.
Si on the surface of the silicon wafer is oxidized by ozone, and Cu remains as Cu 2+ ions in the ultrapure water to prevent the adhesion with Si. Also,
Even if Cu adheres to Si on the silicon wafer surface, ozone, which is an oxidizing agent, deprives Cu of electrons and ionizes it, so that it can be redissolved in ultrapure water as Cu 2+ ions. it can. Further, as the silicon on the silicon wafer surface is oxidized and the silicon wafer surface is covered with the oxide film, the exchange of electrons between Cu 2+ ions and Si becomes less likely to occur, so that Cu adheres to the silicon wafer surface. Can be further suppressed.

【0013】 また、シリコンウエハをオゾン添加超純
水で洗浄することにより、フォトレジスト以外の有機物
を室温で効果的に除去することができるだけでなく、シ
リコンウエハ表面のマイクロラフネスを抑制する効果も
ある。
Further, by cleaning the silicon wafer with ozone-added ultrapure water, not only organic substances other than the photoresist can be effectively removed at room temperature, but also there is an effect of suppressing micro roughness on the silicon wafer surface. .

【0014】 更に、予めシリコンウエハをオゾン添加
超純水で洗浄しておくことにより、NH4OH−H22
−H2O混合液(APM[SC−1])による洗浄を高
温(60〜80℃)で行っても、シリコンウエハ表面の
酸化膜耐圧特性を劣化させることがないため、シリコン
ウエハ表面の清浄度(特に、パーティクルの洗浄効果)
を向上させることができる。
Further, by previously cleaning the silicon wafer with ozone-added ultrapure water, NH 4 OH—H 2 O 2
Be performed -H 2 O mixture was washed by (APM [SC-1]) at high temperature (60-80 ° C.), since there is no degrade the oxide dielectric breakdown voltage characteristics of the silicon wafer surface, cleaning of the surface of the silicon wafer Degree (especially particle cleaning effect)
Can be improved.

【0015】 尚、前記のような効果を十分に発揮させ
るためには、オゾン添加超純水のオゾン濃度が、5〜2
0ppmであることが好ましい。
In order to sufficiently exhibit the above-mentioned effects, the ozone concentration of the ozone-added ultrapure water must be 5 to 2
It is preferably 0 ppm.

【0016】 また、本発明のシリコンウエハの洗浄方
法は、上記に示したように、1回目の洗浄工程と2回目
の洗浄工程で用いるNH4OH−H22−H2O混合液
(SC−1)の温度を変えている点が重要である。1回
目の洗浄工程で用いるNH4OH−H22−H2O混合液
(30〜70℃)は、2回目の洗浄工程の負担を軽減す
るために、予めシリコンウエハ表面の有機汚染物、パー
ティクル及び遷移金属不純物(特に、Cu)をある程度
除去することが目的である。
Further, as described above, the silicon wafer cleaning method of the present invention employs a NH 4 OH—H 2 O 2 —H 2 O mixed solution (used in the first cleaning step and the second cleaning step). It is important that the temperature of SC-1) is changed. The NH 4 OH—H 2 O 2 —H 2 O mixed solution (30 to 70 ° C.) used in the first cleaning step is used to reduce the burden of the second cleaning step on organic contaminants on the silicon wafer surface in advance. It is an object to remove particles and transition metal impurities (especially Cu) to some extent.

【0017】 次に、2回目の洗浄工程で用いるNH4
OH−H22−H2O混合液(40〜80℃)は、非選
択化学エッチング性と洗浄効果(特に、パーティクル)
を強化したものであり、1回目の洗浄工程で除去しきれ
なかったシリコンウエハ表面の遷移金属不純物(特に、
Cu)及びパーティクルを確実に除去することが目的で
ある。このとき、前記NH4OH−H22−H2O混合液
の温度が、40℃未満である場合、パーティクルの洗浄
効果が十分でなく、80℃を超過する場合、H22がす
ぐ分解してしまい、その酸化力を持続することが困難で
あることから、70〜75℃であることが望ましい。
Next, NH 4 used in the second cleaning step
OH-H 2 O 2 -H 2 O mixture (40 to 80 ° C.) is a non-selective chemical etching of the cleaning effect (particularly, particles)
Transition metal impurities on the silicon wafer surface that could not be completely removed in the first cleaning step (particularly,
The purpose is to reliably remove Cu) and particles. At this time, if the temperature of the NH 4 OH—H 2 O 2 —H 2 O mixed solution is less than 40 ° C., the effect of cleaning particles is not sufficient, and if the temperature exceeds 80 ° C., H 2 O 2 is reduced. The temperature is desirably 70 to 75 ° C. because it is quickly decomposed and it is difficult to maintain its oxidizing power.

【0018】 尚、このとき用いるNH4OH−H22
−H2O混合液(SC−1)は、NH4OH:H22:H
2O(体積比)が1:5:100〜1:10:100で
あることが好ましいが、NH4OH:H22:H2O(体
積比)が1:1:10〜1:10:10であってもよ
い。
The NH 4 OH—H 2 O 2 used at this time is
-H 2 O mixture (SC-1) are, NH 4 OH: H 2 O 2: H
2 O is (volume ratio) 1: 5: 100: 10: is preferably a 100, NH 4 OH: H 2 O 2: H 2 O ( by volume) of 1: 1: 10-1: It may be 10:10.

【0019】[0019]

【実施例】 本発明を実施例に基づいて、更に詳細に説
明するが、本発明はこれらの実施例に限られるものでは
ない。尚、シリコンウエハ表面の酸化膜耐圧特性および
清浄度は、以下に示す方法により評価した。
EXAMPLES The present invention will be described in more detail based on examples, but the present invention is not limited to these examples. The oxide film breakdown voltage characteristics and cleanliness of the silicon wafer surface were evaluated by the following methods.

【0020】 (シリコンウエハ表面の酸化膜耐圧特性
の評価方法)ゲート酸化膜200オングストローム、キ
ャパシタ面積1mm2の条件で、酸化膜破壊電荷量が、
0.0001クーロン以下であるものを不良とし、試験
を行った。シリコンウエハ上の全測定点に対する発生不
良個数の割合を不良率として評価した。
(Evaluation Method of Oxide Film Withstand Voltage Characteristics on Silicon Wafer Surface) Under the conditions of a gate oxide film of 200 Å and a capacitor area of 1 mm 2 , the oxide film breakdown charge amount becomes
The test was performed with a test piece having a value of 0.0001 coulomb or less as bad. The ratio of the number of occurrence failures to all the measurement points on the silicon wafer was evaluated as a failure rate.

【0021】 (シリコンウエハ表面の清浄度の評価方
法) 日立電子エンジニアリング社製:LS6000を用いて
測定したLPD(≧0.2μm)に基づいてシリコンウ
エハ表面の清浄度の評価を行った。尚、LPD(ライト
・ポイント・ディフェクト)とは、集光下で輝点として
観察できる欠陥、パーティクルおよび結晶欠陥等を表し
たものである。
(Method for Evaluating Cleanliness of Silicon Wafer Surface) The cleanliness of the silicon wafer surface was evaluated based on LPD (≧ 0.2 μm) measured by LS6000 manufactured by Hitachi Electronics Engineering Co., Ltd. Note that LPD (light point defect) represents defects, particles, crystal defects, and the like that can be observed as bright spots under condensed light.

【0022】 (実施例1〜4、比較例1〜4)ポリッ
シング後のシリコンウエハ(サイズ:200mm)を、
表1に示す条件でそれぞれ洗浄した時におけるシリコン
ウエハ表面の酸化膜耐圧特性および清浄度をそれぞれ測
定した(実施例1〜4、比較例1〜4)。得られた結果
を表2に示す。
(Examples 1 to 4, Comparative Examples 1 to 4) A silicon wafer (size: 200 mm) after polishing was
The oxide film breakdown voltage characteristics and cleanliness of the silicon wafer surface when each was cleaned under the conditions shown in Table 1 were measured (Examples 1 to 4 and Comparative Examples 1 to 4). Table 2 shows the obtained results.

【0023】[0023]

【表1】 [Table 1]

【0024】[0024]

【表2】 [Table 2]

【0025】 (考察)表2の結果から、実施例1〜4
は、比較例1〜4と比較して、シリコンウエハ表面の酸
化膜耐圧特性を十分満足することが判明した。また、実
施例1〜2(STEP4で用いるSC−1の液温が75
℃の場合)は、シリコンウエハ表面の酸化膜耐圧特性だ
けでなく、清浄度も同時に満足することができた。
(Consideration) From the results in Table 2, Examples 1 to 4
Was found to sufficiently satisfy the oxide film breakdown voltage characteristics on the surface of the silicon wafer as compared with Comparative Examples 1 to 4. Further, in Examples 1 and 2 (the liquid temperature of SC-1 used in STEP 4 was 75
In the case of (° C.), not only the oxide film withstand voltage characteristic of the silicon wafer surface but also the cleanliness could be satisfied at the same time.

【0026】[0026]

【発明の効果】 以上の説明から明らかなように、本発
明のシリコンウエハの洗浄方法は、有機化合物の分解・
除去及び遷移金属不純物(特に、Cu)の除去に優れた
オゾン添加超純水洗浄と、洗浄効果に優れたNH4OH
−H22−H2O混合液による洗浄を組み合わせること
により、シリコンウエハ表面の酸化膜耐圧特性と清浄度
の両方を一挙に改善することができる。また、従来の洗
浄方法と比較して、HF,H2SO4,HCl等の化学薬
品の使用量を大幅に削減することができるため、コスト
削減と環境汚染の防止に寄与することができる。
As is clear from the above description, the method for cleaning a silicon wafer according to the present invention is capable of decomposing and decomposing an organic compound.
Ozone-added ultrapure water cleaning excellent in removal and removal of transition metal impurities (especially Cu), and NH 4 OH excellent in cleaning effect
By combining the cleaning with the -H 2 O 2 -H 2 O mixed solution, both the oxide film breakdown voltage characteristics and the cleanliness of the silicon wafer surface can be improved at once. In addition, compared with the conventional cleaning method, the amount of use of chemicals such as HF, H 2 SO 4 , and HCl can be significantly reduced, which can contribute to cost reduction and prevention of environmental pollution.

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 シリコンウエハ表面の清浄化と酸化膜耐
圧特性を改善するためのシリコンウエハの洗浄方法であ
って、 (a)オゾン添加超純水でシリコンウエハを洗浄し、 (b)30〜70℃のNH4OH−H22−H2O混合液
でシリコンウエハを洗浄した後、 (c)更に、オゾン添加超純水でシリコンウエハを洗浄
し、 (d)40〜80℃のNH4OH−H22−H2O混合液
でシリコンウエハを洗浄することを特徴とするシリコン
ウエハの洗浄方法。
1. A method for cleaning a silicon wafer for cleaning the surface of the silicon wafer and improving the withstand voltage characteristics of an oxide film, comprising: (a) cleaning the silicon wafer with ozone-added ultrapure water; After cleaning the silicon wafer with a mixed solution of NH 4 OH—H 2 O 2 —H 2 O at 70 ° C., (c) further cleaning the silicon wafer with ozone-added ultrapure water; NH 4 OH-H 2 O 2 -H 2 O mixture method of cleaning a silicon wafer, characterized by washing the silicon wafer with.
【請求項2】 オゾン添加超純水のオゾン濃度が、5〜
20ppmである請求項1に記載のシリコンウエハの洗
浄方法。
2. The ozone concentration of ozone-added ultrapure water is 5 to 5.
2. The method for cleaning a silicon wafer according to claim 1, wherein the amount is 20 ppm.
【請求項3】 NH4OH−H22−H2O混合液のNH
4OH:H22:H2O(体積比)が、1:5:100〜
1:10:100である請求項1又は2に記載のシリコ
ンウエハの洗浄方法。
3. The NH 4 OH—H 2 O 2 —H 2 O mixed solution of NH 4 OH—H 2 O 2 —H 2 O
4 OH: H 2 O 2 : H 2 O (volume ratio) is 1: 5: 100-
3. The method for cleaning a silicon wafer according to claim 1, wherein the ratio is 1: 10: 100.
【請求項4】 工程(b)及び工程(d)の後に、シリ
コンウエハをリンスする請求項1〜3のいずれか1項に
記載のシリコンウエハの洗浄方法。
4. The method for cleaning a silicon wafer according to claim 1, wherein the silicon wafer is rinsed after the steps (b) and (d).
JP10258548A 1998-09-11 1998-09-11 Washing method of silicon wafer Withdrawn JP2000091291A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010057677A (en) * 1999-12-23 2001-07-05 황인길 Cleaning method for a wafer
CN100423190C (en) * 2005-08-10 2008-10-01 株式会社上睦可 Silicon wafer cleaning method
CN102651327A (en) * 2011-02-25 2012-08-29 芝浦机械电子株式会社 Substrate cleaning device and method, producing device of display means and producing method thereof
CN112086342A (en) * 2019-06-14 2020-12-15 有研半导体材料有限公司 Process method for effectively removing back sealing points on back surface of back sealing silicon wafer

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010057677A (en) * 1999-12-23 2001-07-05 황인길 Cleaning method for a wafer
CN100423190C (en) * 2005-08-10 2008-10-01 株式会社上睦可 Silicon wafer cleaning method
US7632357B2 (en) 2005-08-10 2009-12-15 Sumco Corporation Silicon wafer cleaning method
CN102651327A (en) * 2011-02-25 2012-08-29 芝浦机械电子株式会社 Substrate cleaning device and method, producing device of display means and producing method thereof
CN102651327B (en) * 2011-02-25 2014-11-12 芝浦机械电子株式会社 Substrate cleaning device and method, producing device of display means and producing method thereof
CN112086342A (en) * 2019-06-14 2020-12-15 有研半导体材料有限公司 Process method for effectively removing back sealing points on back surface of back sealing silicon wafer
CN112086342B (en) * 2019-06-14 2023-10-20 有研半导体硅材料股份公司 Technological method for effectively removing back sealing points on back surface of back sealing silicon wafer

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