JPH0823022A - Wafer lifting equipment - Google Patents

Wafer lifting equipment

Info

Publication number
JPH0823022A
JPH0823022A JP15565194A JP15565194A JPH0823022A JP H0823022 A JPH0823022 A JP H0823022A JP 15565194 A JP15565194 A JP 15565194A JP 15565194 A JP15565194 A JP 15565194A JP H0823022 A JPH0823022 A JP H0823022A
Authority
JP
Japan
Prior art keywords
wafer
wafers
vacuum
cassette
pressure sensor
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
JP15565194A
Other languages
Japanese (ja)
Inventor
Kozo Kurimoto
宏三 栗本
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.)
Hitachi Ltd
Hitachi High Tech Control Systems Corp
Original Assignee
Hitachi Ltd
Hitachi Naka Electronics Co 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 Hitachi Ltd, Hitachi Naka Electronics Co Ltd filed Critical Hitachi Ltd
Priority to JP15565194A priority Critical patent/JPH0823022A/en
Publication of JPH0823022A publication Critical patent/JPH0823022A/en
Pending legal-status Critical Current

Links

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  • Container, Conveyance, Adherence, Positioning, Of Wafer (AREA)

Abstract

PURPOSE:To provide a simple-structured equipment for taking wafers in a cassette out of the cassette without damaging them. CONSTITUTION:Vacuum pin sets 3A-3F in the same number as that of wafers 2 stored in a cassette 1 are inserted between the waters and solenoid valves 8A-8F are operated sequentially. Each time the solenoid valve is operated, it is detected by a vacuum pressure sensor whether there is a wafer or not. Then, the wafer is sucked by the vacuum pincette and then is lifted by an actuator 11. When the wafer is lifted, only a rear face of the wafer is brought into contact with a lifting member. Therefore, no damage is given to the wafer.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は半導体の製造工程におい
て、例えばウエハーを標準カセットより拡散炉専用石英
ボート等の他のカセットに複数枚同時にバッチ処理によ
り移し換える際にウエハーをカセットより持ち上げる装
置に係る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for lifting a wafer from a cassette when transferring a plurality of wafers from a standard cassette to another cassette such as a quartz boat exclusively for a diffusion furnace by batch processing at the same time in a semiconductor manufacturing process. Pertain.

【0002】[0002]

【従来の技術】従来の技術を図4と図5により説明す
る。図4に於いて50はカセットでウエハー51を複数
枚収納させる治具を示す。図4に示すようにカセット5
0はウエハー51が垂直に立つように横向きに置かれ
る。
2. Description of the Related Art A conventional technique will be described with reference to FIGS. In FIG. 4, reference numeral 50 represents a jig for storing a plurality of wafers 51 in a cassette. As shown in FIG. 4, the cassette 5
0 is placed sideways so that the wafer 51 stands vertically.

【0003】52はウエハー持ち上げ具でエアーシリン
ダ等のアクチュエータ53により上下動する。ウエハー
持ち上げ具52が上方に移動するとウエハー持ち上げ具
52に設けられている溝54にウエハー51の下部がは
まり込む。更にウエハー持ち上げ具52が上昇すると図
5に示す状態となる。次にウエハー51の有り無しを検
出するウエハーセンサ55が矢印57方向に案内軸56
に沿って移動しながらウエハー51の有り無しをチェッ
クし記憶装置(図示せず)に記憶される。ウエハー有り
無しの情報はウエハーの枚数管理等に用いられる。
A wafer lifting tool 52 is moved up and down by an actuator 53 such as an air cylinder. When the wafer lifting tool 52 moves upward, the lower part of the wafer 51 fits into the groove 54 provided in the wafer lifting tool 52. When the wafer lifting tool 52 is further raised, the state shown in FIG. 5 is obtained. Next, the wafer sensor 55 for detecting the presence / absence of the wafer 51 is moved in the direction of arrow 57 by the guide shaft 56.
The presence or absence of the wafer 51 is checked while moving along with and is stored in a storage device (not shown). The information regarding the presence / absence of wafers is used for controlling the number of wafers.

【0004】[0004]

【発明が解決しようとする課題】上記従来技術は、ウエ
ハー51の一端がウエハー持ち上げ具52の溝54には
まり込む時にウエハー51が倒れないようにするために
溝幅はウエハーの厚みより僅かに広く作られているのみ
で、ウエハーが入りずらく且つウエハーの表面(半導体
のパタン面)に傷を付けるなどの欠点があった。又ウエ
ハーの有り無しをチェックするウエハーセンサ55の機
構を別途必要とし装置を複雑なものとしていた。
In the above-mentioned prior art, in order to prevent the wafer 51 from falling when one end of the wafer 51 is fitted into the groove 54 of the wafer lifting tool 52, the groove width is slightly wider than the thickness of the wafer. However, there are drawbacks such that the wafer is difficult to enter and the surface of the wafer (semiconductor pattern surface) is scratched. Also, a mechanism for the wafer sensor 55 for checking the presence / absence of the wafer is separately required, and the apparatus is complicated.

【0005】本発明の目的は、上記欠点に鑑みウエハー
に損傷を与える事無くしかも簡単な構造で信頼性を高め
た装置を提供するにある。
In view of the above-mentioned drawbacks, an object of the present invention is to provide an apparatus having a simple structure and improved reliability without damaging the wafer.

【0006】[0006]

【課題を解決するための手段】上記目的を達成するため
に、本発明においては従来の技術に用いられている溝付
きのウエハー持ち上げ具の代りにウエハーを一枚ずつ保
持する真空ピンセットを設けると共にウエハーが真空ピ
ンセットに吸着されたことを確認する真空圧センサを取
り付ける。真空ピンセットに吸着されたウエハーを持ち
上げるにはエアーシリンダ等のアクチュエータにより行
う。
To achieve the above object, in the present invention, vacuum tweezers for holding wafers one by one are provided in place of the grooved wafer lifting tool used in the prior art. Attach a vacuum pressure sensor to confirm that the wafer has been attracted to the vacuum tweezers. An actuator such as an air cylinder is used to lift the wafer adsorbed on the vacuum tweezers.

【0007】真空ピンセットと真空圧センサはバッチ処
理に必要なウエハーの数だけ用意される。
As many vacuum tweezers and vacuum pressure sensors as the number of wafers required for batch processing are prepared.

【0008】[0008]

【作用】真空圧センサでウエハーの存在が確認されると
そのウエハーに対応する電磁弁が作動してウエハー裏面
を真空ピンセットが吸着する。
When the presence of the wafer is confirmed by the vacuum pressure sensor, the electromagnetic valve corresponding to the wafer is activated and the vacuum tweezers adsorb the back surface of the wafer.

【0009】続いてエアーシリンダ等のアクチュエータ
が作動して全ウエハーを持ち上げる。真空圧センサで確
認された情報は記憶装置に記憶される。
Then, an actuator such as an air cylinder is activated to lift all the wafers. The information confirmed by the vacuum pressure sensor is stored in the storage device.

【0010】[0010]

【実施例】以下、本発明の実施例を、図1〜図3により
説明する。
Embodiments of the present invention will be described below with reference to FIGS.

【0011】図1に於いて1はカセットでウエハー2を
複数枚収納させる治具である。図に示すようにカセット
1はウエハー2が垂直に立つように横向きに置かれる。
3A〜3Fは真空ピンセットで、その詳細を図2に示
す。真空ピンセット3A〜3Fはその一部に開口部4を
有し、ピンセット固定台5に固定される。
In FIG. 1, reference numeral 1 is a jig for storing a plurality of wafers 2 in a cassette. As shown, the cassette 1 is placed sideways so that the wafer 2 stands vertically.
Vacuum tweezers 3A to 3F are shown in detail in FIG. Each of the vacuum tweezers 3A to 3F has an opening 4 in a part thereof and is fixed to a tweezers fixing base 5.

【0012】ピンセット固定台5には、チューブ6が接
続されておりその先に真空圧センサ7と電磁弁8A〜8
Fが接続される。電磁弁8A〜8Fには真空元圧チュー
ブ9が接続される。真空ピンセット,真空圧センサと電
磁弁は一対として機能しバッチ枚数に必要な数だけ用意
される。
A tube 6 is connected to the tweezers fixing base 5, and a vacuum pressure sensor 7 and solenoid valves 8A-8A are provided at the tip thereof.
F is connected. A vacuum source pressure tube 9 is connected to the solenoid valves 8A to 8F. The vacuum tweezers, vacuum pressure sensor and solenoid valve function as a pair, and the required number of batches is prepared.

【0013】ピンセット固定台5の中央にはリフト軸1
0が有り、エアーシリンダ等のアクチュエータ11が取
り付けられている。
A lift shaft 1 is provided at the center of the tweezers fixing base 5.
0, and an actuator 11 such as an air cylinder is attached.

【0014】アクチュエータ11が作動するとリフト軸
10が上方に移動する。
When the actuator 11 operates, the lift shaft 10 moves upward.

【0015】これに伴い真空ピンセット3A〜3Fも上
方に移動してウエハー2の裏面に挿入される。挿入され
た状態を図2に示す。次に電磁弁8Aが作動すると真空
ピンセット3Aの開口部4が真空状態となる。真空ピン
セット3Aに対応する位置にウエハーが有る場合にはウ
エハーは開口部4の真空吸着力により真空ピンセット3
Aに吸着される。ウエハーを吸着した情報は真空圧セン
サ7で検出され電磁弁8Aを通電状態にさせると共に記
憶装置(図示せず)に記憶される。
Along with this, the vacuum tweezers 3A to 3F also move upward and are inserted into the back surface of the wafer 2. The inserted state is shown in FIG. Next, when the solenoid valve 8A is activated, the opening 4 of the vacuum tweezers 3A is in a vacuum state. When the wafer is located at a position corresponding to the vacuum tweezers 3A, the wafer is vacuum tweezers 3 due to the vacuum suction force of the opening 4.
Adsorbed by A. The information on the suction of the wafer is detected by the vacuum pressure sensor 7 and the electromagnetic valve 8A is energized and stored in a storage device (not shown).

【0016】続いて電磁弁8Bが作動すると、同様にウ
エハーが真空ピンセット3Bに吸着される。この動作が
逐次行われる。
When the solenoid valve 8B is subsequently operated, the wafer is similarly attracted to the vacuum tweezers 3B. This operation is sequentially performed.

【0017】ウエハーが無い場合には真空圧センサが、
検知して電磁弁への電力を遮断するので真空がリークす
ることはない。
If there is no wafer, the vacuum pressure sensor
Since it detects and shuts off the power to the solenoid valve, the vacuum does not leak.

【0018】カセット1内に全ウエハー2が真空ピンセ
ットに吸着されると、再びアクチュエータ11が作動し
てウエハーは図3に示す如くカセット1の上方に持ち上
げられる。
When all the wafers 2 in the cassette 1 are attracted to the vacuum tweezers, the actuator 11 is actuated again to lift the wafers above the cassette 1 as shown in FIG.

【0019】[0019]

【発明の効果】本発明によれば、ウエハーを持ち上げる
部材とウエハーが接触する部分はウエハーの裏面のみで
あるからウエハーにダメージを与えることがない。又ウ
エハーは一枚一枚真空ピンセットにより真空吸着された
後持ち上げられるので移動中に位置ずれしたり、落下す
ることがない。カセット内に収納されているウエハーの
枚数管理は真空ピンセットでウエハーを吸着する際、真
空圧センサで検出され、このデータに基づいて行われる
ので別の検出器を必要とせず機構を簡単にすることがで
きる。
According to the present invention, since the portion where the member for lifting the wafer and the wafer contact each other is only the back surface of the wafer, the wafer is not damaged. Further, the wafers are lifted after being vacuum-adsorbed one by one by the vacuum tweezers, so that the wafers are not displaced during the movement or fall. The number of wafers stored in the cassette is controlled by the vacuum pressure sensor when adsorbing the wafers with the vacuum tweezers, and is performed based on this data, so a separate detector is not required and the mechanism is simplified. You can

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

【図1】本発明の一実施例を示す構成図である。FIG. 1 is a configuration diagram showing an embodiment of the present invention.

【図2】本発明のピンセット部を一部断面にした拡大図
である。
FIG. 2 is an enlarged view of the tweezers portion of the present invention with a partial cross section.

【図3】本発明の動作状態図である。FIG. 3 is an operation state diagram of the present invention.

【図4】従来の技術を示す構成図である。FIG. 4 is a configuration diagram showing a conventional technique.

【図5】従来技術の動作図である。FIG. 5 is an operation diagram of a conventional technique.

【符号の説明】[Explanation of symbols]

2…半導体ウエハー、3A〜3F…真空ピンセット、7
…真空圧センサ、8A〜8F…電磁弁、11…アクチュ
エータ。
2 ... Semiconductor wafer, 3A to 3F ... Vacuum tweezers, 7
... vacuum pressure sensor, 8A to 8F ... solenoid valve, 11 ... actuator.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】複数枚の半導体ウエハー(以下ウエハーと
いう)を収納するウエハーカセット(以下カセットとい
う)よりウエハーを複数枚同時に取り出す装置におい
て、ウエハーが垂直方向を向くようにカセットを設置
し、真空圧力を検出する真空圧センサを具備した複数個
からなる真空ピンセットをウエハー間に下方より挿入し
てウエハー裏面の一部を真空吸着して、持ち上げる際
に、前記の真空圧センサでウエハーの有り無しをチェッ
クした後、ウエハーを順次吸着させ、持ち上げることを
特徴とするウエハー持ち上げ装置。
1. An apparatus for simultaneously taking out a plurality of wafers from a wafer cassette (hereinafter referred to as a cassette) accommodating a plurality of semiconductor wafers (hereinafter referred to as "wafers"), in which the cassettes are installed so that the wafers are oriented in a vertical direction Insert a plurality of vacuum tweezers equipped with a vacuum pressure sensor to detect between the wafers from below to vacuum-adsorb a part of the back surface of the wafer and lift the wafer with or without the vacuum pressure sensor. After checking, the wafer lifting device is characterized in that the wafers are sequentially sucked and lifted.
JP15565194A 1994-07-07 1994-07-07 Wafer lifting equipment Pending JPH0823022A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15565194A JPH0823022A (en) 1994-07-07 1994-07-07 Wafer lifting equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15565194A JPH0823022A (en) 1994-07-07 1994-07-07 Wafer lifting equipment

Publications (1)

Publication Number Publication Date
JPH0823022A true JPH0823022A (en) 1996-01-23

Family

ID=15610628

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15565194A Pending JPH0823022A (en) 1994-07-07 1994-07-07 Wafer lifting equipment

Country Status (1)

Country Link
JP (1) JPH0823022A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7317311B2 (en) 2003-02-04 2008-01-08 Oki Electric Industry Co., Ltd. Wafer handling checker
JP2010251790A (en) * 1998-07-10 2010-11-04 Brooks Automation Inc Dual arm substrate handling robot with batch loader

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010251790A (en) * 1998-07-10 2010-11-04 Brooks Automation Inc Dual arm substrate handling robot with batch loader
JP2013093615A (en) * 1998-07-10 2013-05-16 Brooks Automation Inc Substrate extraction method of substrate handling robot
US7317311B2 (en) 2003-02-04 2008-01-08 Oki Electric Industry Co., Ltd. Wafer handling checker

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