JP3988317B2 - Board alignment device - Google Patents

Board alignment device Download PDF

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Publication number
JP3988317B2
JP3988317B2 JP14878199A JP14878199A JP3988317B2 JP 3988317 B2 JP3988317 B2 JP 3988317B2 JP 14878199 A JP14878199 A JP 14878199A JP 14878199 A JP14878199 A JP 14878199A JP 3988317 B2 JP3988317 B2 JP 3988317B2
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Japan
Prior art keywords
substrate
alignment apparatus
notch
light beam
substrates
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JP14878199A
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JP2000340638A (en
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克明 ▲高▼木
信之 北村
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Screen Holdings Co Ltd
Dainippon Screen Manufacturing Co Ltd
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Screen Holdings Co Ltd
Dainippon Screen Manufacturing Co Ltd
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Description

【0001】
【産業上の利用分野】
本発明は切り欠きを有するウエハ等、円盤状の基板を整列させる基板整列装置に関する。
【0002】
【従来の技術】
従来の基板整列装置100を図5に示す。
図5(a)(b)のように、基板整列装置100は水平方向(図5においては紙面と垂直な方向)に延設された係合ローラ101と、係合口一ラ101の下方で係合ローラ101と接触しており、係合口一ラ101と平行に延設された駆動ローラ102とを有する。駆動ローラ102は図示せぬ駆動機構により回転させられる。
そして、この基板整列装置100では紙面と垂直な方向に複数の基板Wが並んだ状態で、該基板Wが係合口一ラ101上に支持される。複数の基板Wには切り欠きNが設けられており、前記係合口一ラ101と係合可能である。
このような基板整列装置100の動作について説明する。
【0003】
まず、図(a)のように、駆動口一ラ102が時計回りに回転すると、係合ローラ101が反時計回りに回転する。これによって、基板Wが時計回りに回転する。回転が進行すると、図5(b)のように基板Wに設けられた切り欠きNと係合ローラ101とが係合し、当該基板Wはそれ以上回転しなくなる。そして、この基板整列装置100では複数の基板W全ての切り欠きNが係合ローラ101と係合するであろう時間、具体的には基板Wが1回以上回転する時間を駆動時間として予め決めておき、前記駆動時間だけ駆動ローラ102を回転する。なお、駆動時間に達するより前に切り欠きNが係合ローラ101と係合した場合は、係合口一ラ101は切り欠きNと係合した状態で空回りしている。
【0004】
こうして、複数の基板Wはそれぞれが有する切り欠きNの位置が係合ローラ101の位置に配された状態に整列させられる。
【0005】
【発明が解決しようとする課題】
上記基板整列装置100では、基板Wの整列が完了したか否かに拘らず、予め決められた駆動時間だけは必ず駆動ローラ102を回転させる。このため、当該駆動時間よりも短い時間で整列が完了してしまった場合は以下のような不都合が生じる。
【0006】
まず、係合ローラ101を切り欠きNと係合した状態で必要以上に回転させるので、係合口一ラ101と切り欠きNとの摺動が必要以上に生じ、その分多くの汚染物質が発生し、基板Wを汚染する恐れがある,
【0007】
また、係合口一ラ101を切り欠きNと係合した状態で必要以上に回転させるので、係合口一ラ101の摩滅が激しくなり、係合ローラ101の寿命が短くなる。従って、頻繁に係合ローラ101を交換する必要が生じ、装置のランニングコストが抑制できない。
【0008】
また、必要以上に基板Wを整列装置100と関係させているのでスループットが向上しなくなる。
【0009】
本発明の目的は基板整列装置における汚染物質発生の抑制、ランニングコストの低減、スループットの向上である。
【0010】
【課題を解決するための手段】
請求項1の基板整列装置は周部に切り欠きを有し、略鉛直方向に起立して主面と直交する方向に複数並んだ状態にある円盤状の基板を支持し、前記各基板の切り欠きの位置を所定位置に整列させる基板整列装置であって、前記基板の下方に配置されて該基板の端部に接触し、基板の並び方向と平行な軸を中心に回転して前記基板を回転させる基板回転手段と、前記基板の下方で基板の端部を支持し、前記切り欠きと係合可能な係合部材と、前記係合部材に前記基板の切り欠きが係合した際に、前記係合部材とともに前記基板を支持する支持手段と、前記係合部材と前記切り欠きとが係合したときに、前記基板回転手段と前記係合部材とにより支持されていた基板が前記係合部材と前記支持手段とにより支持されることにより生じる、前記基板の主面を含む面内における前記基板の変位を検知する検知手段と、前記検知手段が複数の基板すべての変位を検知したとき前記基板回転手段の回転を停止させる制御手段とを備えた基板整列装置である。
請求項2の基板整列装置は、請求項1に記載の基板整列装置において、前記支持手段は、前記係合部材に対して前記基板回転手段とは逆側に配置された支持部材を有する。
請求項3に記載の基板整列装置は、請求項2に記載の基板整列装置において、前記支持手段は、前記係合部材と前記基板回転手段との間に配置された第2の支持部材を有する。
【0011】
請求項の基板整列装置は請求項1乃至請求項3のいずれかに記載の基板整列装置において、前記検知手段は基板の並び方向と平行に光線を発射する投光素子と、前記投光素子から発射された光線を受光する受光素子とを有し、前記基板の主面を含む面内において基板の変位前は基板が存在し、変位後は基板が存在しなくなる基板有無位置を前記光線が通過するように前記投光素子を配置した基板整列装置である。
【0012】
請求項の基板整列装置は請求項に記載の基板整列装置において、前記制御手段は受光素子が光線を受光したとき、所定時間後にもう一度、受光素子が光線を受光しているかどうかを確認し、受光している場合は基板回転手段を停止させ、受光していない場合はさらに基板回転手段を回転させる基板整列装置である
【0013】
【発明の実施の形態】
図1は、本発明の基板整列装置1の斜視図である。なお、矢印Fで示される面を基板整列装置1の正面とする。
図示のように基板整列装置1はエアシリンダ61を有し、該エアシリンダ61上に台板10が水平状態で固定されており、エアシリンダ61によって台板10が基板Wの下方において昇降可能となっている。
台板10上には垂直に2枚の側板13a、13bが設けられており、該2枚の側板13a、13b間には第1駆動ローラ21、第2駆動口一ラ22、支持棒23、係合ローラ24、フリーローラ25が支持されている。
【0014】
第1駆動ローラ21の一方の軸端は側板13aの外部に突出しており、該軸端には第1従動スプロケット21aが固定されている。第2駆動ローラ22の一方の軸端もまた側板13aの外部に突出しており、該軸端には第2従動スプロケット22aが固定されている。第2駆動ローラ22の外周には係合ローラ24の外周が接触しており、第2駆動ローラ22が回転すると係合口一ラ24に回転力が伝わり係合ローラ24が回転する構造となっている。
【0015】
また、台板10にはモータ30が固定されている。モータ30にはシャフト31が結合され、該シャフト31には側板13aと側板13bとの間にて駆動ギア32が設けられ、側板13aの外部にて第1駆動スプロケット33が固定されている。
そして、第1スプロケット33と第1従動スプロケット21aとの間には無端ベルトである第1ベルト34が掛けまわされている。
【0016】
前記駆動ギア32には反転ギア35が噛み合っており、反転ギア35に結合されているシャフト36は側板13aの外側に突出し、その端部には弟2駆動スプロケット37が固定されている。
【0017】
第2駆動スプロケット37と第2従動スプロケット22aとの間には無端ベルトである第2ベルト38が掛けまわされている。
【0018】
フリーローラ25は側板13a、13bに対して回転自在に設けられている。また、支持棒23は側板13a、13bに固定されている。
【0019】
このような構成により、モータ30を正面視で反時計回りに駆動すると基板Wは正面視で時計回りに回転する。
【0020】
一方、図示しない機枠には投光素子41と受光素子42とが固定されており、投光素子41から発射された光線Rが受光素子42に至る構造となっている。
【0021】
前記光線Rは複数の基板Wが並ぶ方向(以下、基板並び方向という。)と平行に設定されている。なお、光線Rが配される場所については後述する。
【0022】
図2は基板整列装置1の制御に関するブロック図である。
【0023】
CPU、RAM、ROM、タイマーを有している制御部50にはスタートスイッチ51、投光素子41、受光素子42、モータ30、エアシリンダ61が接続されている。
【0024】
以上のような基板整列装置1は図3(a)のように2対のガイド55a、55bによって保持された基板Wの整列を行う。
【0025】
ここで基板Wは周部に切り欠きNを有した円盤状の基板である。
【0026】
また、ガイド55a、55bは図1のように基板並び方向に延びる長手部材であって、鉛直方向に延びる複数の溝56a、56bを有し、該複数の溝56a、56bによって基板Wを保持している。なお、図1ではガイド55a、55bそれぞれの対において、一方のガイド55a、55bのみを図示し、他方の図示を省略している。
【0027】
このようなガイド55a、55bは基板Wの基板並び方向における動きを規制し、基板Wが略鉛直方向に起立した状態でかつ複数並んだ状態にて保持する。
【0028】
次に図3(a)(b)、および、図4(a)(b)を参照して基板整列装置1の動作について説明する。なお、図3(a)(b)、図4(a)(b)ともに基板整列装置1の要部の正面図である。
【0029】
最初、図3(a)のようにガイド55a、55bに保持されている基板Wの下方に基板整列装置1が配置された状態でスタートスイッチ51がonにされると制御部50はエアシリンダ61を駆動して台板10を上昇させる。これにより、図3(b)のように基板整列装置1がガイド55a、55bに保持されている基板Wを.突き上げて支持する。このとき、基板Wは第1駆動口一ラ21、係合口一ラ24によって支持される。
【0030】
次に制御部50は投光素子41から光線Rを発射し、受光素子42に光線Rが到達しているかどうかの監視を開始するとともに、モータ30を駆動し、図4(a)のように基板Wを時計回りに回転させる。
【0031】
基板Wが回転して切り欠きNが係合口一ラ24と係合すると図4(b)のように基板Wは
【0032】
係合口一ラ24上に乗り上げ、支持棒23、係合ローラ24、フリーローラ25によって支持される。このとき、基板Wはその主面が含まれる面内で図4(b)のように変位する。すなわち、整列前位置WAから整列後位置WBにかけて変位する。
【0033】
ここで、光線Rが配される位置について説明すると、光線Rは図4(b)のように基板Wの変位前は基板Wが存在し、変位後は基板Wが存在しなくなる位置に配されている。なお、光線Rは基板Wの変位前は基板Wが存在し、変位後は基板Wが存在しなくなる位置に配されればどこでも良く、具体的には図4(b)において斜線で示す基板有無領域WR内であればどこでもよい。
【0034】
さて、全ての基板Wが変位すると、基板Wによって遮られていた光線Rが受光素子42に到達可能となる。そして、制御部50が受光素子42での光線Rの受光を確認すると該制御部50はタイマーのカウントを始める。そして所定時間が経過した後、制御部50はもう一度、光線Rが受光素子42に到達しているかどうかを確認し、到達していれば、全ての基板Wの整列が完了したと判断してモータ30の駆動を停止し、投光素子41からの光線Rの発射を停止する。そして、制御部50はエアシリンダ61を駆動して台板10を降下させることによって、基板整列装置1が支持していた基板Wをガイド55a、55bに渡す。
【0035】
また、前記所定時間経過後にもう一度受光素子42に光線Rが到達しているかどうかを確認したとき、受光素子42に光線Rが到達していなければ、それは偶然、光線Rの光軸上に全ての基板Wの切り欠きNが揃ったことになるので引き続き投光素子41からの光線Rの発射および、モータ30の駆動を続行し、再び受光素子42への光線Rの到達の有無を監視する状態に戻る。
【0036】
ここで、前記所定時間について説明する。
【0037】
基板整列装置1に1枚だけ基板Wを支持させ、該基板Wが光線Rを遮った状態にして基板Wを回転させ始めたとき、切り欠きNが光線Rの通過している部分に到来して光線Rが切り欠きNを通過したときの時刻をt0、さらに基板Wを回転させて切り欠きNが光線Rの通過している部分を通り過ぎ、光線Rが再び基板Wに遮られるようになったときの時刻をtl、さらに基板Wを回転させて、切り欠きNが光線Rの通過している部分に再び到来し、光線Rが切り欠きNを通過するようになったときの時刻をt3としたとき、前記所定時間は(tl−t0)以上で、かつ、(t3−tl)より短い時間である。
【0038】
以上のように本発明の基板整列装置1では基板Wは必要最小限の時間しか回転させないので、基板Wと基板Wに接触している部材との間で摺動が生じている時間が最小限になり、汚染物質の発生が抑制される。
【0039】
また、前記摺動が生じている時間が最小限になるので、基板Wと接触する部材、例えば係合ローラ24や駆動口一ラ21の摩滅が抑制され、これら部材の交換額度が低くなり、ランニングコストが低減できる。
【0040】
また、基板Wの整列が完了すれば即座に次工程に基板Wを渡すことができるのでスループットを向上させることができる
【0041】
また、本発明の基板整列装置1では光線Rによって基板Wの変位を検知しているので基板Wに接触することなく基板Wの変位を検知できる。このため、基板Wとの接触による汚染物質の発生を防止しながら基板Wの変位を検知できる。
【0042】
また、本発明の基板整列装置1では制御手段50は受光素子42が光線Rを受光したとき、所定時間後にもう一度受光素子42が光線を受光したかどうかを確認する。従って、偶然全ての基板Wの切り欠きNが光線Rの位置で揃ってしまった場合でも引き続き基板Wを回転させて係合ローラ24の位置において全ての基板Wの切り欠きNを揃えることができる。よって、確実に基板を整列して次工程に渡すことができる。
【0043】
【発明の効果】
請求項1乃至請求項3の基板整列装置によれば、基板回転手段によって基板が回転させられる。このとき、係合部材は回転する基板の端部を支持しているが、係合部材上に切り欠きが到来すると係合部材と切り欠きとが係合する。これにより、基板がその主面を含む面内において変位する。
【0044】
検知手段は前記変位を検知し、制御手段は検知手段からの出力により全ての基板の変位を確認したとき基板回転手段回転を停止させる。
【0045】
このため、基板は必要最小限の時間しか回転されないので汚染物質の発生が抑制される。
【0046】
そして、回転する基板と接触する部材の摩滅が抑制されランニングコストが低減できる。
【0047】
また、基板の整列が完了すれば即座に次工程に基板を渡すことができるのでスループットを向上させることができる。
【0048】
請求項の基板整列装置によれば、投光素子から発射される光線が基板有無位置を通過するので、基板の変位前は受光素子に至る光線が遮られ、基板の変位後は受光素子に光線が到達する。ここで、複数の基板は主面と直交する方向に並んだ状態なので全ての基板の変位が生じてはじめて受光素子に光線が到達する。
【0049】
従って、投光素子から発射された光線が受光素子に到達することにより、全ての基板の変位を検知できる。
【0050】
制御手段はこの検知結果に従って基板回転手段を停止させる。
【0051】
ここでは光線によって基板の変位を検知しているので基板に接触することなく基板の変位を検知できる。このため、基板との接触による汚染物質の発生を防止できる。
【0052】
請求項の基板整列装置によれば、前記制御手段は受光素子が光線を受光した後、所定時間後にもう一度受光素子が光線を受光したかどうかを確認する。
【0053】
すなわち、偶然複数の基板全ての切り欠きが同時に基板有無位置に位置した場合、投光素子から発射された光線が受光素子に到達してしまうが、このような場合でも制御手段は基板の整列が完了したとは即断せず、所定時間後にもう一度、受光素子が光線を受光したかどうかを確認する。
【0054】
このとき受光素子が受光していなければ、制御手段は偶然切り欠きが同時に基板有無位置に位置したものであると判断して、基板回転手段を引き続き回転させる。一方、受光素子が依然受光している場合は全ての基板が変位したと判断して、基板回転手段を停止させる。従って、確実に基板を整列させることができる。
【図面の簡単な説明】
【図1】本発明に係る基板整列装置の一実施形態を示す斜視図である。
【図2】基板整列装置の制御に関するブロック図である。
【図3】基板整列装置の要部正面図である。
【図4】基板整列装置の要部正面図である。
【図5】従来の基板整列装置を示す図である。
【符号の説明】
1 基板整列装置
21 第1駆動ローラ
22 第2駆動口一ラ
24 係合口一ラ
30 モータ
41 投光素子
42 受光素子
50 制御部
61 エアシリンダ
N 切り欠き
R 光線
W 基板
WR 基板有無傾域
[0001]
[Industrial application fields]
The present invention relates to a substrate alignment apparatus for aligning a disk-shaped substrate such as a wafer having a notch.
[0002]
[Prior art]
A conventional substrate alignment apparatus 100 is shown in FIG.
As shown in FIGS. 5A and 5B, the substrate alignment apparatus 100 is engaged with an engaging roller 101 extending in a horizontal direction (a direction perpendicular to the paper surface in FIG. The driving roller 102 is in contact with the combination roller 101 and extends in parallel with the engagement opening 101. The driving roller 102 is rotated by a driving mechanism (not shown).
In the substrate aligning apparatus 100, the substrates W are supported on the engagement opening 101 with the plurality of substrates W arranged in a direction perpendicular to the paper surface. The plurality of substrates W are provided with cutouts N and can be engaged with the engagement opening 101.
The operation of the substrate alignment apparatus 100 will be described.
[0003]
First, as shown in FIG. 1A, when the drive opening 102 rotates clockwise, the engagement roller 101 rotates counterclockwise. As a result, the substrate W rotates clockwise. As the rotation proceeds, the notch N provided in the substrate W and the engagement roller 101 engage with each other as shown in FIG. 5B, and the substrate W does not rotate any more. In the substrate aligning apparatus 100, a time during which all the cutouts N of the plurality of substrates W will be engaged with the engaging roller 101, specifically, a time during which the substrate W rotates one or more times is determined in advance as a driving time. The driving roller 102 is rotated for the driving time. If the notch N is engaged with the engagement roller 101 before the driving time is reached, the engagement opening 101 is idle while being engaged with the notch N.
[0004]
In this way, the plurality of substrates W are aligned in a state where the position of the notch N included in each of the substrates W is arranged at the position of the engagement roller 101.
[0005]
[Problems to be solved by the invention]
In the substrate alignment apparatus 100, the driving roller 102 is always rotated only for a predetermined driving time regardless of whether or not the alignment of the substrates W is completed. For this reason, the following inconvenience occurs when the alignment is completed in a time shorter than the driving time.
[0006]
First, since the engaging roller 101 is rotated more than necessary in the state of being engaged with the notch N, the engagement port 101 and the notch N slide more than necessary, and a lot of contaminants are generated accordingly. And may contaminate the substrate W.
[0007]
In addition, since the engagement opening 101 is rotated more than necessary in the state where it is engaged with the notch N, the engagement opening 101 is worn away and the life of the engagement roller 101 is shortened. Therefore, it is necessary to frequently replace the engagement roller 101, and the running cost of the apparatus cannot be suppressed.
[0008]
Further, since the substrate W is associated with the alignment apparatus 100 more than necessary, the throughput is not improved.
[0009]
An object of the present invention is to suppress the generation of contaminants in a substrate alignment apparatus, to reduce running costs, and to improve throughput.
[0010]
[Means for Solving the Problems]
The substrate alignment apparatus according to claim 1 has a notch in the peripheral portion, supports a plurality of disk-like substrates that are erected in a substantially vertical direction and are arranged in a direction perpendicular to the main surface, and each of the substrates is cut. A substrate alignment apparatus for aligning a position of a notch at a predetermined position, which is arranged below the substrate, contacts an end of the substrate, and rotates about an axis parallel to the alignment direction of the substrates. A substrate rotating means for rotating, an engagement member that supports an end of the substrate below the substrate, and engageable with the notch, and when the notch of the substrate is engaged with the engagement member, When the engaging member supports the substrate together with the engaging member, and the engaging member and the notch engage with each other, the substrate supported by the substrate rotating unit and the engaging member is engaged. caused by being supported by said support means and members, the substrate A substrate aligning apparatus comprising: detecting means for detecting displacement of the substrate in a plane including a main surface; and control means for stopping rotation of the substrate rotating means when the detecting means detects displacement of all of the plurality of substrates. It is.
A substrate alignment apparatus according to a second aspect is the substrate alignment apparatus according to the first aspect, wherein the support means includes a support member disposed on a side opposite to the substrate rotation means with respect to the engagement member.
The substrate alignment apparatus according to claim 3 is the substrate alignment apparatus according to claim 2, wherein the support means includes a second support member disposed between the engagement member and the substrate rotation means. .
[0011]
The substrate alignment apparatus according to claim 4 is the substrate alignment apparatus according to any one of claims 1 to 3 , wherein the detecting means emits a light beam parallel to a direction in which the substrates are aligned, and the light projection element. A light receiving element that receives a light beam emitted from the substrate, wherein the light beam indicates a substrate presence / absence position where the substrate is present before displacement of the substrate and no substrate is present after displacement in a plane including the main surface of the substrate. A substrate alignment apparatus in which the light projecting elements are arranged to pass through.
[0012]
The substrate alignment apparatus according to claim 5 is the substrate alignment apparatus according to claim 4 , wherein when the light receiving element receives the light beam, the control means confirms again whether the light receiving element receives the light beam after a predetermined time. If you have received has a substrate rotating means is stopped, a substrate alignment system for further rotating the substrate rotation means if not received.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a perspective view of a substrate alignment apparatus 1 according to the present invention. The surface indicated by the arrow F is the front surface of the substrate alignment apparatus 1.
As shown in the figure, the substrate alignment apparatus 1 has an air cylinder 61, and the base plate 10 is fixed in a horizontal state on the air cylinder 61, and the base plate 10 can be moved up and down below the substrate W by the air cylinder 61. It has become.
Two side plates 13a and 13b are vertically provided on the base plate 10, and a first drive roller 21, a second drive port roller 22, a support rod 23, between the two side plates 13a and 13b, The engagement roller 24 and the free roller 25 are supported.
[0014]
One shaft end of the first driving roller 21 protrudes to the outside of the side plate 13a, and the first driven sprocket 21a is fixed to the shaft end. One shaft end of the second driving roller 22 also protrudes outside the side plate 13a, and a second driven sprocket 22a is fixed to the shaft end. The outer periphery of the second driving roller 22 is in contact with the outer periphery of the engaging roller 24, and when the second driving roller 22 rotates, the engaging roller 24 is rotated to transmit the rotational force. Yes.
[0015]
A motor 30 is fixed to the base plate 10. A shaft 31 is coupled to the motor 30, a drive gear 32 is provided between the side plate 13a and the side plate 13b, and a first drive sprocket 33 is fixed outside the side plate 13a.
A first belt 34 that is an endless belt is wound between the first sprocket 33 and the first driven sprocket 21a.
[0016]
A reversing gear 35 meshes with the driving gear 32, and a shaft 36 coupled to the reversing gear 35 protrudes to the outside of the side plate 13a, and a younger brother 2 driving sprocket 37 is fixed to the end thereof.
[0017]
A second belt 38 that is an endless belt is wound between the second drive sprocket 37 and the second driven sprocket 22a.
[0018]
The free roller 25 is rotatably provided with respect to the side plates 13a and 13b. The support bar 23 is fixed to the side plates 13a and 13b.
[0019]
With this configuration, when the motor 30 is driven counterclockwise when viewed from the front, the substrate W rotates clockwise when viewed from the front.
[0020]
On the other hand, a light projecting element 41 and a light receiving element 42 are fixed to a machine frame (not shown), and a light beam R emitted from the light projecting element 41 reaches the light receiving element 42.
[0021]
The light ray R is set in parallel to a direction in which a plurality of substrates W are arranged (hereinafter referred to as a substrate arrangement direction). The place where the light ray R is arranged will be described later.
[0022]
FIG. 2 is a block diagram relating to the control of the substrate alignment apparatus 1.
[0023]
A start switch 51, a light projecting element 41, a light receiving element 42, a motor 30, and an air cylinder 61 are connected to a control unit 50 having a CPU, RAM, ROM, and timer.
[0024]
The substrate alignment apparatus 1 as described above aligns the substrates W held by the two pairs of guides 55a and 55b as shown in FIG.
[0025]
Here, the substrate W is a disk-shaped substrate having a notch N in the peripheral portion.
[0026]
Further, the guides 55a and 55b are longitudinal members extending in the substrate alignment direction as shown in FIG. 1, and have a plurality of grooves 56a and 56b extending in the vertical direction, and the substrate W is held by the plurality of grooves 56a and 56b. ing. In FIG. 1, only one guide 55a, 55b is shown in the pair of guides 55a, 55b, and the other is omitted.
[0027]
Such guides 55a and 55b regulate the movement of the substrate W in the substrate arrangement direction, and hold the substrate W in a state where a plurality of substrates W are arranged in a substantially vertical direction.
[0028]
Next, the operation of the substrate alignment apparatus 1 will be described with reference to FIGS. 3 (a) and 3 (b) and FIGS. 4 (a) and 4 (b). FIGS. 3A, 3B and 4A, 4B are front views of the main part of the substrate alignment apparatus 1. FIG.
[0029]
First, as shown in FIG. 3A, when the start switch 51 is turned on in a state where the substrate alignment apparatus 1 is disposed below the substrate W held by the guides 55a and 55b, the control unit 50 causes the air cylinder 61 to turn on. To raise the base plate 10. As a result, as shown in FIG. 3 (b), the substrate alignment apparatus 1 moves the substrate W held by the guides 55a and 55b. Push up and support. At this time, the substrate W is supported by the first drive port 21 and the engagement port 24.
[0030]
Next, the control unit 50 emits the light beam R from the light projecting element 41, starts monitoring whether the light beam R has reached the light receiving element 42, and drives the motor 30, as shown in FIG. The substrate W is rotated clockwise.
[0031]
When the substrate W is rotated and the notch N is engaged with the engagement opening 24, the substrate W becomes as shown in FIG.
It rides on the engagement port 24 and is supported by the support rod 23, the engagement roller 24, and the free roller 25. At this time, the substrate W is displaced as shown in FIG. 4B within a plane including the main surface. That is, it is displaced from the pre-alignment position WA to the post-alignment position WB.
[0033]
Here, the position where the light beam R is arranged will be described. As shown in FIG. 4B, the light beam R is arranged at a position where the substrate W exists before the substrate W is displaced and after the displacement, the substrate W does not exist. ing. Note that the light ray R may be placed anywhere as long as the substrate W exists before the displacement of the substrate W and the substrate W does not exist after the displacement. Specifically, the presence or absence of the substrate indicated by hatching in FIG. It may be anywhere within the area WR.
[0034]
When all the substrates W are displaced, the light ray R blocked by the substrate W can reach the light receiving element 42. When the control unit 50 confirms that the light receiving element 42 receives the light ray R, the control unit 50 starts counting the timer. Then, after a predetermined time has elapsed, the control unit 50 once again confirms whether or not the light beam R has reached the light receiving element 42, and if it has reached, determines that the alignment of all the substrates W has been completed and the motor 50 30 is stopped, and the emission of the light beam R from the light projecting element 41 is stopped. Then, the control unit 50 drives the air cylinder 61 to lower the base plate 10 to transfer the substrate W supported by the substrate alignment apparatus 1 to the guides 55a and 55b.
[0035]
Further, when it is confirmed whether or not the light beam R has arrived at the light receiving element 42 again after the predetermined time has elapsed, if the light beam R has not reached the light receiving element 42, it happens to be all of the light R on the optical axis. Since the notches N of the substrate W are now aligned, the emission of the light beam R from the light projecting element 41 and the driving of the motor 30 are continued, and the presence or absence of the light beam R reaching the light receiving element 42 is monitored again. Return to.
[0036]
Here, the predetermined time will be described.
[0037]
When the substrate alignment apparatus 1 supports only one substrate W, and the substrate W starts to rotate with the light ray R blocked, the notch N arrives at the portion through which the light ray R passes. The time when the light ray R passes through the notch N is t0, and the substrate W is further rotated so that the notch N passes through the portion through which the light ray R passes, and the light ray R is again blocked by the substrate W. Tl, and the substrate W is further rotated so that the notch N arrives again at the part through which the light ray R passes, and the time when the light ray R passes through the notch N is given as t3. In this case, the predetermined time is equal to or longer than (tl−t0) and shorter than (t3−tl).
[0038]
As described above, in the substrate alignment apparatus 1 of the present invention, since the substrate W is rotated only for the minimum necessary time, the time during which the sliding occurs between the substrate W and the member in contact with the substrate W is minimized. And the generation of pollutants is suppressed.
[0039]
In addition, since the time during which the sliding occurs is minimized, wear of the members that come into contact with the substrate W, for example, the engagement roller 24 and the drive opening 21 is suppressed, and the replacement amount of these members is reduced. Running cost can be reduced.
[0040]
Further, if the alignment of the substrates W is completed, the substrate W can be immediately transferred to the next process, so that the throughput can be improved.
Moreover, since the displacement of the substrate W is detected by the light ray R in the substrate alignment apparatus 1 of the present invention, the displacement of the substrate W can be detected without contacting the substrate W. For this reason, the displacement of the substrate W can be detected while preventing the generation of contaminants due to contact with the substrate W.
[0042]
Further, in the substrate alignment apparatus 1 of the present invention, when the light receiving element 42 receives the light beam R, the control means 50 confirms whether the light receiving element 42 has received the light beam again after a predetermined time. Therefore, even when all the cutouts N of the substrates W are aligned at the position of the light beam R, the substrates W can be continuously rotated to align the cutouts N of all the substrates W at the position of the engagement roller 24. . Therefore, the substrates can be surely aligned and passed to the next process.
[0043]
【The invention's effect】
According to the substrate alignment apparatus of the first to third aspects, the substrate is rotated by the substrate rotating means. At this time, the engaging member supports the end portion of the rotating substrate, but when the notch comes on the engaging member, the engaging member and the notch are engaged. As a result, the substrate is displaced in a plane including the main surface.
[0044]
The detecting means detects the displacement, and the control means stops the rotation of the substrate rotating means when the displacement of all the substrates is confirmed by the output from the detecting means.
[0045]
For this reason, since the substrate is rotated only for a necessary minimum time, generation of contaminants is suppressed.
[0046]
And the abrasion of the member which contacts a rotating board | substrate is suppressed and a running cost can be reduced.
[0047]
Further, when the alignment of the substrates is completed, the substrate can be immediately transferred to the next process, so that the throughput can be improved.
[0048]
According to the substrate alignment apparatus of the fourth aspect , since the light beam emitted from the light projecting element passes through the substrate presence / absence position, the light beam reaching the light receiving element is blocked before the substrate is displaced, and the light receiving element is disposed after the substrate is displaced. Rays reach. Here, since the plurality of substrates are arranged in a direction perpendicular to the main surface, the light beam reaches the light receiving element only after the displacement of all the substrates occurs.
[0049]
Therefore, when the light beam emitted from the light projecting element reaches the light receiving element, the displacement of all the substrates can be detected.
[0050]
The control means stops the substrate rotating means according to the detection result.
[0051]
Here, since the displacement of the substrate is detected by the light beam, the displacement of the substrate can be detected without contacting the substrate. For this reason, generation | occurrence | production of the contaminant by contact with a board | substrate can be prevented.
[0052]
According to the substrate alignment apparatus of the fifth aspect , after the light receiving element receives the light beam, the control unit confirms whether the light receiving element receives the light beam again after a predetermined time.
[0053]
That is, if all of the cutouts of a plurality of substrates are coincidentally positioned at the substrate presence / absence position, the light beam emitted from the light projecting element reaches the light receiving element. Even in such a case, the control means does not align the substrates. It is not immediately determined that the process has been completed, and it is checked again after a predetermined time whether the light receiving element has received the light beam.
[0054]
At this time, if the light receiving element is not receiving light, the control means determines that the notch is simultaneously located at the substrate presence / absence position, and continues to rotate the substrate rotation means. On the other hand, if the light receiving element is still receiving light, it is determined that all the substrates have been displaced, and the substrate rotating means is stopped. Therefore, the substrates can be surely aligned.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of a substrate alignment apparatus according to the present invention.
FIG. 2 is a block diagram relating to control of the substrate alignment apparatus.
FIG. 3 is a front view of a main part of the substrate alignment apparatus.
FIG. 4 is a front view of a main part of the substrate alignment apparatus.
FIG. 5 is a view showing a conventional substrate alignment apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Substrate aligning device 21 1st drive roller 22 2nd drive port 1 24 engagement port 1 30 Motor 41 Light projecting element 42 Light receiving element 50 Control part 61 Air cylinder N Notch R Light beam W Substrate WR

Claims (5)

周部に切り欠きを有し、略鉛直方向に起立して主面と直交する方向に複数並んだ状態にある円盤状の基板を支持し、前記各基板の切り欠きの位置を所定位置に整列させる基板整列装置であって、
前記基板の下方に配置されて該基板の端部に接触し、基板の並び方向と平行な軸を中心に回転して前記基板を回転させる基板回転手段と、
前記基板の下方で基板の端部を支持し、前記切り欠きと係合可能な係合部材と、
前記係合部材に前記基板の切り欠きが係合した際に、前記係合部材とともに前記基板を支持する支持手段と、
前記係合部材と前記切り欠きとが係合したときに、前記基板回転手段と前記係合部材とにより支持されていた基板が前記係合部材と前記支持手段とにより支持されることにより生じる、前記基板の主面を含む面内における前記基板の変位を検知する検知手段と、
前記検知手段が複数の基板すべての変位を検出したとき前記基板回転手段の回転を停止させる制御手段と
を備えた基板整列装置。
Supports a disk-shaped substrate that has a notch in the periphery, stands in a substantially vertical direction, and is aligned in a direction perpendicular to the main surface, and aligns the position of the notch on each substrate at a predetermined position. A substrate aligning device,
A substrate rotating means arranged below the substrate to contact an end of the substrate and rotate about an axis parallel to the direction in which the substrates are arranged;
An engagement member that supports an end of the substrate below the substrate and engages with the notch;
A support means for supporting the substrate together with the engaging member when the notch of the substrate is engaged with the engaging member;
When the engaging member and the notch are engaged , the substrate supported by the substrate rotating means and the engaging member is supported by the engaging member and the supporting means . Detecting means for detecting displacement of the substrate in a plane including a main surface of the substrate;
And a control means for stopping the rotation of the substrate rotating means when the detecting means detects the displacement of all of the plurality of substrates.
請求項1に記載の基板整列装置において、The substrate alignment apparatus according to claim 1, wherein
前記支持手段は、前記係合部材に対して前記基板回転手段とは逆側に配置された支持部材を有する基板整列装置。The substrate alignment apparatus, wherein the support means includes a support member disposed on a side opposite to the substrate rotation means with respect to the engagement member.
請求項2に記載の基板整列装置において、The substrate alignment apparatus according to claim 2, wherein
前記支持手段は、前記係合部材と前記基板回転手段との間に配置された第2の支持部材を有する基板整列装置。The substrate alignment apparatus, wherein the support means includes a second support member disposed between the engagement member and the substrate rotation means.
請求項1乃至請求項3のいずれかに記載の基板整列装置において、
前記検知手段は基板の並び方向と平行に光線を発射する投光素子と、前記投光素子から発射された光線を受光する受光素子とを有し、
前記基板の主面を含む面内において基板の変位前は基板が存在し、変位後は基板が存在しなくなる基板有無位置を前記光線が通過するように前記投光素子を配置した基板整列装置。
The substrate alignment apparatus according to any one of claims 1 to 3 ,
The detection means includes a light projecting element that emits a light beam parallel to the direction in which the substrates are arranged, and a light receiving element that receives the light beam emitted from the light projecting element,
A substrate alignment apparatus in which the light projecting elements are arranged so that the light beam passes through a substrate presence / absence position where the substrate exists before the displacement of the substrate in the plane including the main surface of the substrate and does not exist after the displacement.
請求項に記載の基板整列装置において、
前記制御手段は受光素子が光線を受光したとき、所定時間後にもう一度、受光素子が光線を受光しているかどうかを確認し、受光している場合は基板回転手段を停止させ、受光していない場合はさらに基板回転手段を回転させる基板整列装置。
The substrate alignment apparatus according to claim 5 , wherein
When the light receiving element receives the light beam, the control means checks again after a predetermined time whether the light receiving element receives the light beam. Is a substrate alignment apparatus for further rotating the substrate rotating means.
JP14878199A 1999-05-27 1999-05-27 Board alignment device Expired - Fee Related JP3988317B2 (en)

Priority Applications (1)

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Publication number Priority date Publication date Assignee Title
US11328947B1 (en) 2021-01-26 2022-05-10 Kawasaki Jukogyo Kabushiki Kaisha Aligner apparatus and alignment method

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KR100758691B1 (en) * 2006-04-20 2007-09-14 세메스 주식회사 System for aligning wafers and method thereof
KR100816524B1 (en) * 2006-12-12 2008-03-24 어플라이드랩(주) Positioning apparatus
KR100899618B1 (en) * 2007-08-21 2009-05-27 세메스 주식회사 Unit for aligning wafer and apparatus for cleaning wafer having the same
JP4849482B2 (en) * 2008-05-02 2012-01-11 スピードファム株式会社 Underwater aligner for semiconductor wafers with notches

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US11328947B1 (en) 2021-01-26 2022-05-10 Kawasaki Jukogyo Kabushiki Kaisha Aligner apparatus and alignment method

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