JPH09106967A - Freeze cut method of semiconductor wafer or the like - Google Patents

Freeze cut method of semiconductor wafer or the like

Info

Publication number
JPH09106967A
JPH09106967A JP28818495A JP28818495A JPH09106967A JP H09106967 A JPH09106967 A JP H09106967A JP 28818495 A JP28818495 A JP 28818495A JP 28818495 A JP28818495 A JP 28818495A JP H09106967 A JPH09106967 A JP H09106967A
Authority
JP
Japan
Prior art keywords
wafer
chuck table
work
freeze
freezing
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.)
Pending
Application number
JP28818495A
Other languages
Japanese (ja)
Inventor
Kazunori Inaba
和徳 稲葉
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.)
Disco Corp
Original Assignee
Disco Abrasive Systems 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 Disco Abrasive Systems Ltd filed Critical Disco Abrasive Systems Ltd
Priority to JP28818495A priority Critical patent/JPH09106967A/en
Publication of JPH09106967A publication Critical patent/JPH09106967A/en
Pending legal-status Critical Current

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  • Dicing (AREA)

Abstract

PROBLEM TO BE SOLVED: To reduce the impact of a rotating blade given to a wafer so as to restrain the surface of the wafer from being chipped and to increase a wafer fixing power so as to protect the rear of the wafer against cracking by a method wherein a work is placed on a freezing chuck table and freeze fixed, and an ice film is formed on the cut surface of the work. SOLUTION: A work such as a semiconductor wafer W or the like is placed on a freezing chuck table R and freeze fixed, an ice film 6 is formed on the cut surface of the work W, and then the work W is cut with a rotating blade J through the ice film 6. For instance, a proper amount of water or a spray is fed from a nozzle 4 to the freezing chuck table where no wafer W is present, then the wafer W is placed thereon, and water or spray is frozen to form an icing layer to fix the wafer W. Then, a proper amount of water or spray is fed from a nozzle 4 onto the wafer W and frozen to form an ice film 6 on the upper surface and side face of the wafer W, and then the wafer W is cut with the rotating blade J through the intermediary of the ice film 6.

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、半導体ウェーハ等
の凍結切削方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a freeze cutting method for semiconductor wafers and the like.

【0002】[0002]

【従来の技術】一般に、半導体ウェーハ等を精密切削す
る切削装置例えばダイサーは、図3に示すようにカセッ
ト載置領域AにカセットCを載置し、このカセットC内
から搬出入手段BによりウェーハW(粘着テープNを介
してフレームFに配設されている)を待機領域Dに搬出
し、そのウェーハWを旋回アームを有する搬送手段Eに
よりチャックテーブルT上に搬送して吸引保持させると
共に、チャックテーブルTをアライメント手段Gに位置
付けてアライメントした後、回転ブレードを有する切削
手段Hで切削する。
2. Description of the Related Art Generally, a cutting device for precisely cutting a semiconductor wafer or the like, for example, a dicer, places a cassette C in a cassette placement area A as shown in FIG. W (disposed on the frame F via the adhesive tape N) is unloaded to the standby area D, and the wafer W is transferred onto the chuck table T by the transfer means E having a swing arm to be suction-held. After the chuck table T is positioned and aligned with the alignment means G, it is cut by the cutting means H having a rotating blade.

【0003】[0003]

【発明が解決しようとする課題】前記従来のダイサーに
おいては、切削時に図4に示すようにウェーハWの表面
が回転ブレードJの衝撃力を直接受けるので、図5に示
すようにウェーハWの表面にチッピングPが生じる。
又、前記粘着テープNは柔軟でウェーハWの固定力が弱
いため、ウェーハWの裏面にクラックQが生じ易い。本
発明は、このような従来の問題点を解決すべくなされた
もので、切削時における回転ブレードの衝撃力を緩和し
てウェーハの表面チッピングを減少させると共に、ウェ
ーハの固定力を増大してウェーハの裏面クラックも減少
させるようにした、半導体ウェーハ等の凍結切削方法を
提供することを課題とする。
In the conventional dicer, since the surface of the wafer W is directly subjected to the impact force of the rotary blade J as shown in FIG. 4 during cutting, the surface of the wafer W as shown in FIG. A chipping P occurs at.
Further, since the adhesive tape N is flexible and the fixing force for the wafer W is weak, cracks Q are likely to occur on the back surface of the wafer W. The present invention has been made to solve such a conventional problem, and reduces the impact force of the rotating blade during cutting to reduce the surface chipping of the wafer, while increasing the fixing force of the wafer It is an object of the present invention to provide a freeze cutting method for a semiconductor wafer or the like, which reduces backside cracks.

【0004】[0004]

【課題を解決するための手段】前記課題を技術的に解決
するための手段として、本発明は、半導体ウェーハ等の
被加工物を冷凍チャックテーブル上に載置し凍結固定す
る工程と、前記被加工物の切削面に氷結膜を形成する工
程と、回転ブレードで前記氷結膜を介して被加工物を切
削する工程と、から構成される凍結切削方法を要旨とす
る。
As means for technically solving the above-mentioned problems, the present invention provides a step of placing a workpiece such as a semiconductor wafer on a freezing chuck table and freeze-fixing the workpiece. A gist of a freezing cutting method includes a step of forming a frozen film on a cutting surface of a workpiece and a step of cutting a workpiece with the rotating blade through the frozen film.

【0005】[0005]

【発明の実施の形態】以下、本発明の実施の形態を添付
図面に基づいて詳説する。図2に示すのは冷凍チャック
テーブルRであり、テーブル本体1と、その下面に配設
されたペルチェ素子等からなるサーモモジュール2と、
このサーモモジュール2の下面に配設された冷却手段例
えば冷却ステージ3とから構成され、サーモモジュール
2に通電してその上面2aから吸熱し、下面2bから放
熱することでテーブル本体1を冷凍出来るようにしてあ
る。前記冷却ステージ3は、導入口3aから冷却流体が
流入され排出口3bから流出される。
Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 2 shows a freezing chuck table R, which includes a table body 1 and a thermo module 2 including a Peltier element or the like arranged on the lower surface thereof.
The thermo module 2 is composed of a cooling means, for example, a cooling stage 3 arranged on the lower surface of the thermo module 2, and the table main body 1 can be frozen by energizing the thermo module 2 to absorb heat from the upper surface 2a and to radiate heat from the lower surface 2b. I am doing it. The cooling fluid flows into the cooling stage 3 through the inlet 3a and flows out through the outlet 3b.

【0006】このように形成された冷凍チャックテーブ
ルRは、前記チャックテーブルTに替えてダイサー等に
装着され、テーブル本体1上にウェーハWのみ(粘着テ
ープN及びフレームFは存在しない)載置し且つこれを
凍結固定する。この凍結固定したウェーハWを前記回転
ブレードJで切削する。
The freezing chuck table R thus formed is mounted on a dicer or the like in place of the chuck table T, and only the wafer W is placed on the table body 1 (the adhesive tape N and the frame F do not exist). And this is freeze-fixed. The freeze-fixed wafer W is cut by the rotary blade J.

【0007】切削方法を工程順に説明すると、先ず被加
工物であるウェーハWを冷凍チャックテーブルR上に載
置し凍結固定する工程を行う。即ち、図1に示すノズル
4からウェーハWの存在しない冷凍チャックテーブルR
上に水又は霧を適量供給し、その上にウェーハWを載置
して水又は霧を冷凍することにより氷結層5を形成して
ウェーハWを固定する。この状態で、冷凍チャックテー
ブルRを前記アライメント手段Gに位置付けてアライメ
ント作業を行う。
The cutting method will be described in order of steps. First, a step of placing a wafer W, which is an object to be processed, on a freezing chuck table R and freezing and fixing it. That is, from the nozzle 4 shown in FIG.
An appropriate amount of water or mist is supplied onto the wafer W, and the wafer W is placed on the water W to freeze the water or mist to form the frozen layer 5 and fix the wafer W. In this state, the freeze chuck table R is positioned on the alignment means G to perform the alignment work.

【0008】次に、ウェーハWの切削面に氷結膜を形成
する工程を行う。これは図1に示すように前記ノズル4
からウェーハW上に水又は霧を適量供給し、これを冷凍
することによりウェーハWの上面及び側面を覆う氷結膜
6を形成する。
Next, a step of forming a frozen film on the cut surface of the wafer W is performed. This is the nozzle 4 as shown in FIG.
From the above, an appropriate amount of water or mist is supplied onto the wafer W, and by freezing it, the frost film 6 covering the upper surface and the side surface of the wafer W is formed.

【0009】この後、前記回転ブレードJで前記氷結膜
6を介してウェーハWを切削する工程を行う。氷結膜6
と一緒にウェーハWを切削すると、回転ブレードJの衝
撃力が氷結膜6に吸収され、ウェーハWの表面にチッピ
ングが生じない。又、ウェーハWは氷結層5で強固に固
定されているので、ウェーハWの裏面にクラックも生じ
ない。更に、ウェーハWの側面を覆っている氷結膜6に
よってウェーハWの端縁が保護されるため、切削時での
端縁の欠けを防止することが出来る。
After that, a step of cutting the wafer W with the rotary blade J through the frozen film 6 is performed. Freezing membrane 6
When the wafer W is cut together with the above, the impact force of the rotating blade J is absorbed by the freezing film 6, and chipping does not occur on the surface of the wafer W. Further, since the wafer W is firmly fixed by the freezing layer 5, no crack is generated on the back surface of the wafer W. Further, since the edge of the wafer W is protected by the freezing film 6 covering the side surface of the wafer W, chipping of the edge during cutting can be prevented.

【0010】[0010]

【発明の効果】以上説明したように、本発明によれば、
半導体ウェーハ等の被加工物の切削面に氷結膜を形成
し、回転ブレードの衝撃力が直接被加工物に伝わらない
ようにしたので表面ピッチングを減少させる効果を奏す
る。又、被加工物を冷凍チャックテーブルに凍結させて
固定力を増大させることで、被加工物の裏面クラックを
減少させる効果も奏する。
As described above, according to the present invention,
Since an ice film is formed on the cutting surface of a workpiece such as a semiconductor wafer so that the impact force of the rotating blade is not directly transmitted to the workpiece, the surface pitching is reduced. Further, by freezing the work piece on the freezing chuck table and increasing the fixing force, the effect of reducing back surface cracks of the work piece is also obtained.

【図面の簡単な説明】[Brief description of the drawings]

【図1】 本発明の実施の形態を示す説明図である。FIG. 1 is an explanatory diagram showing an embodiment of the present invention.

【図2】 冷凍チャックテーブルの概略断面図である。FIG. 2 is a schematic sectional view of a freeze chuck table.

【図3】 ダイサーの一例を示す斜視図である。FIG. 3 is a perspective view showing an example of a dicer.

【図4】 チャックテーブルに固定されたフレーム付き
ウェーハの切削状態を示す説明図である。
FIG. 4 is an explanatory view showing a cutting state of a wafer with a frame fixed to a chuck table.

【図5】 ウェーハの切削後の状態を示す部分拡大図で
ある。
FIG. 5 is a partial enlarged view showing a state after cutting the wafer.

【符号の説明】[Explanation of symbols]

1…テーブル本体 2…サーモモジュール 2a…上面 2b…下面 3…冷凍ステージ 3a…導入口 3b…排出口 J…回転ブレード R…冷凍チャックテーブル T…チャックテーブル W…ウェーハ DESCRIPTION OF SYMBOLS 1 ... Table body 2 ... Thermo module 2a ... Upper surface 2b ... Lower surface 3 ... Freezing stage 3a ... Inlet port 3b ... Ejection port J ... Rotating blade R ... Freezing chuck table T ... Chuck table W ... Wafer

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 半導体ウェーハ等の被加工物を冷凍チャ
ックテーブル上に載置し凍結固定する工程と、前記被加
工物の切削面に氷結膜を形成する工程と、回転ブレード
で前記氷結膜を介して被加工物を切削する工程と、から
構成される半導体ウェーハ等の凍結切削方法。
1. A step of placing an object to be processed such as a semiconductor wafer on a freeze chuck table and freeze-fixing it, a step of forming an icing film on a cutting surface of the object to be processed, and a step of rotating the icing film with a rotary blade. A method of freezing and cutting a semiconductor wafer or the like, which comprises a step of cutting an object to be processed through the process.
JP28818495A 1995-10-11 1995-10-11 Freeze cut method of semiconductor wafer or the like Pending JPH09106967A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP28818495A JPH09106967A (en) 1995-10-11 1995-10-11 Freeze cut method of semiconductor wafer or the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP28818495A JPH09106967A (en) 1995-10-11 1995-10-11 Freeze cut method of semiconductor wafer or the like

Publications (1)

Publication Number Publication Date
JPH09106967A true JPH09106967A (en) 1997-04-22

Family

ID=17726906

Family Applications (1)

Application Number Title Priority Date Filing Date
JP28818495A Pending JPH09106967A (en) 1995-10-11 1995-10-11 Freeze cut method of semiconductor wafer or the like

Country Status (1)

Country Link
JP (1) JPH09106967A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7767557B2 (en) * 2007-05-11 2010-08-03 Micron Technology, Inc. Chilled wafer dicing
JP2012104607A (en) * 2010-11-09 2012-05-31 Tokyo Seimitsu Co Ltd Device and method for dicing workpiece

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7767557B2 (en) * 2007-05-11 2010-08-03 Micron Technology, Inc. Chilled wafer dicing
JP2012104607A (en) * 2010-11-09 2012-05-31 Tokyo Seimitsu Co Ltd Device and method for dicing workpiece

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