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JP5320014B2 - Grinding equipment - Google Patents

Grinding equipment Download PDF

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JP5320014B2
JP5320014B2 JP2008268775A JP2008268775A JP5320014B2 JP 5320014 B2 JP5320014 B2 JP 5320014B2 JP 2008268775 A JP2008268775 A JP 2008268775A JP 2008268775 A JP2008268775 A JP 2008268775A JP 5320014 B2 JP5320014 B2 JP 5320014B2
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cleaning
grinding
suction
workpiece
held
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JP2010094785A (en
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二郎 現王園
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Disco Corp
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Description

本発明は、チャックテーブル上に保持された状態で研削手段によって研削加工された被加工物の被保持面を洗浄するとともに、研削加工された被加工物の被研削面を吸引保持してチャックテーブルから搬出する被加工物搬出手段の吸着パッドの吸着面を洗浄するための洗浄機構を備えた研削装置に関する。   The present invention cleans the held surface of a workpiece ground by a grinding means while being held on the chuck table, and sucks and holds the ground surface of the ground workpiece. The present invention relates to a grinding apparatus including a cleaning mechanism for cleaning a suction surface of a suction pad of a workpiece unloading means that is unloaded from a workpiece.

当業者には周知の如く、半導体デバイス製造工程においては、IC、LSI等のデバイスが複数個形成された半導体ウエーハは、個々のデバイスに分割される前にその裏面(被研削面)を研削装置によって研削して所定の厚さに形成されている。半導体ウエーハの裏面を研削する研削装置は、被加工物を吸引保持するチャックテーブルと、該チャックテーブル上に吸引保持された被加工物を研削する研削手段と、該チャックテーブル上で研削加工された被加工物を吸着パッドの吸着面に吸引保持して搬出する被加工物搬出手段とを具備している。   As is well known to those skilled in the art, in a semiconductor device manufacturing process, a semiconductor wafer on which a plurality of devices such as ICs and LSIs are formed is ground on the back surface (surface to be ground) before being divided into individual devices. It is formed by grinding with a predetermined thickness. A grinding apparatus for grinding a back surface of a semiconductor wafer includes a chuck table for sucking and holding a workpiece, a grinding means for grinding a workpiece sucked and held on the chuck table, and a grinding process performed on the chuck table. A workpiece unloading means for sucking and holding the workpiece on the suction surface of the suction pad is provided.

上述した研削装置を用いて半導体ウエーハの裏面(被研削面)を研削する際には、半導体ウエーハの表面側をチャックテーブル上に保持するので、半導体ウエーハの表面に形成されたデバイスの損傷を防止するために、半導体ウエーハの表面にポリ塩化ビニール等からなる保護テープを貼着している。しかるに、半導体ウエーハの表面に保護テープを貼着してチャックテーブル上に吸引保持した状態で半導体ウエーハの裏面を研削すると、研削によって発生する研削屑がチャックテーブルに吸引保持された保護テープの被保持面との間に侵入して保護テープの被保持面に付着する。保護テープの被保持面に研削屑が付着すると、半導体ウエーハから保護テープを剥がす際の妨げとなったり、以後の工程の汚染源となるという問題がある。   When grinding the back surface (surface to be ground) of a semiconductor wafer using the above-described grinding apparatus, the front surface side of the semiconductor wafer is held on a chuck table, thus preventing damage to devices formed on the surface of the semiconductor wafer. For this purpose, a protective tape made of polyvinyl chloride or the like is attached to the surface of the semiconductor wafer. However, if the back surface of the semiconductor wafer is ground with the protective tape attached to the surface of the semiconductor wafer and sucked and held on the chuck table, the grinding tape generated by grinding is held by the chuck table. It penetrates between the surfaces and adheres to the surface to be held of the protective tape. If grinding scraps adhere to the surface to be held of the protective tape, there is a problem that the protective tape is hindered when the protective tape is peeled off from the semiconductor wafer and becomes a contamination source in the subsequent processes.

一方、研削加工された被加工物をチャックテーブル上から搬出する際には、被加工物の被研削面を被加工物搬出手段の吸着パッドの吸着面に吸引保持して搬送するので、吸着パッドの吸着面にも研削屑が付着する。このように吸着パッドの吸着面に研削屑が付着すると、半導体ウエーハのように薄く形成された被加工物は吸着されたとき割れるという問題がある。   On the other hand, when the ground workpiece is unloaded from the chuck table, the workpiece surface of the workpiece is sucked and held on the suction surface of the suction pad of the workpiece unloading means. Grinding debris also adheres to the suction surface. When the grinding scraps adhere to the suction surface of the suction pad in this way, there is a problem that the workpiece formed as thin as a semiconductor wafer cracks when it is sucked.

上述した問題を解消するために、被加工物搬出手段を構成する吸着パッドの搬出経路に吸着パッドの吸着面を洗浄するとともに、該吸着パッドに吸引保持された被加工物の被保持面を洗浄するための洗浄機構を配設した研削装置が提案されている。(例えば、特許文献1参照)
特開2003−45841号公報
In order to solve the above-described problems, the suction surface of the suction pad is cleaned in the suction path of the suction pad constituting the workpiece discharge means, and the target surface of the workpiece sucked and held by the suction pad is cleaned. There has been proposed a grinding apparatus provided with a cleaning mechanism. (For example, see Patent Document 1)
JP 2003-45841 A

上記特許文献1に開示された洗浄手段は、被加工物搬出手段を構成する吸着パッドの吸着面を洗浄するための円柱状の洗浄ブラシと、吸着パッドの吸着面を研削して平坦にするための研削板と、洗浄ブラシを回転駆動するための回転駆動手段と、研削板を水平面内で往復動させる往復駆動手段と、洗浄ブラシおよび研削板による洗浄部に洗浄液を供給する洗浄液供給手段とを具備している。このように構成された洗浄機構は、洗浄ブラシを回転しつつ吸着パッドに吸引保持された被加工物に貼着された保護テープの下面(被保持面)に接触させることにより、被加工物に貼着された保護テープの下面(被保持面)を洗浄することも可能である。   The cleaning means disclosed in Patent Document 1 is a cylindrical cleaning brush for cleaning the suction surface of the suction pad that constitutes the workpiece unloading means, and for grinding and flattening the suction surface of the suction pad. A grinding plate, a rotational driving means for rotationally driving the cleaning brush, a reciprocating driving means for reciprocating the grinding plate in a horizontal plane, and a cleaning liquid supply means for supplying a cleaning liquid to the cleaning portion by the cleaning brush and the grinding plate. It has. The cleaning mechanism configured as described above allows the workpiece to be processed by contacting the lower surface (held surface) of the protective tape attached to the workpiece sucked and held by the suction pad while rotating the cleaning brush. It is also possible to clean the lower surface (held surface) of the attached protective tape.

而して、上記特許文献1に開示された洗浄機構は、洗浄ブラシを回転駆動するための回転駆動手段と研削板を水平面内で往復動させる往復駆動手段の2つの駆動手段が必要であるために洗浄機構全体が大型化し、設置場所が制限されるという問題がある。また、研削板を水平面内で往復動することにより吸着パッドの吸着面を研削するため、吸着面が偏磨耗するという問題もある。更に、洗浄ブラシを回転しつつ吸着パッドに吸引保持された被加工物に貼着された保護テープの下面(被保持面)に接触させると、保護テープが剥がれるという問題がある。   Thus, the cleaning mechanism disclosed in Patent Document 1 requires two driving means, that is, a rotational driving means for rotationally driving the cleaning brush and a reciprocating driving means for reciprocating the grinding plate in a horizontal plane. In addition, there is a problem that the entire cleaning mechanism is enlarged and the installation place is limited. Further, since the suction surface of the suction pad is ground by reciprocating the grinding plate in a horizontal plane, there is also a problem that the suction surface is unevenly worn. Further, when the cleaning brush is rotated and brought into contact with the lower surface (held surface) of the protective tape attached to the workpiece sucked and held by the suction pad, there is a problem that the protective tape is peeled off.

本発明は上記事実に鑑みてなされたものであり、その主たる技術課題は、洗浄機構全体を小型化することができ、吸着パッドの吸着面に偏磨耗を発生させることがないとともに、被加工物に貼着された保護テープを剥離することなく洗浄することができる洗浄機構を備えた研削装置を提供することにある。   The present invention has been made in view of the above-mentioned facts, and the main technical problem thereof is that the entire cleaning mechanism can be reduced in size, and there is no occurrence of uneven wear on the suction surface of the suction pad. An object of the present invention is to provide a grinding apparatus provided with a cleaning mechanism capable of cleaning without peeling off the protective tape attached to the surface.

上記主たる技術課題を解決するため、本発明によれば、被加工物を保持するチャックテーブルと、該チャックテーブル上に保持された被加工物を研削する研削手段と、該チャックテーブル上で研削された被加工物を吸引保持する吸着面を有する吸着パッドを備えた被加工物搬出手段と、該吸着パッドの搬出経路に配設され該吸着パッドに吸引保持された被加工物の該チャックテーブルに保持されたときの被保持面および該吸着パッドの吸着面を洗浄する洗浄機構と、を具備する研削装置において、
該洗浄機構は、該吸着パッドの吸着面に垂直な方向に配設された回転軸と、該回転軸を回転駆動する回転駆動手段と、該回転軸の上端部に径方向に突出して配設され該吸着パッドの吸着面を洗浄するための研削部材を備えた第1の洗浄手段と、該回転軸の上端部に径方向に突出して配設され該吸着パッドに吸引保持された被加工物の被保持面を洗浄するための柔軟部材を備えた第2の洗浄手段と、該第1の洗浄手段と該第2の洗浄手段のいずれか一方を軸方向に進退し他方の洗浄手段の上面より高い洗浄位置と他方の洗浄手段の上面より低い退避位置に位置付ける位置付け手段と、該回転軸の上端部に径方向に突出して配設され洗浄水を噴射する洗浄水噴射ノズルと、を具備している、
ことを特徴とする研削装置が提供される。
In order to solve the above main technical problem, according to the present invention, a chuck table for holding a workpiece, a grinding means for grinding the workpiece held on the chuck table, and grinding on the chuck table are performed. A workpiece unloading means having a suction pad having a suction surface for sucking and holding the workpiece, and a chuck table of the workpiece disposed on the suction pad unloading path and sucked and held by the suction pad. In a grinding device comprising a held surface when held and a cleaning mechanism for cleaning the suction surface of the suction pad,
The cleaning mechanism includes a rotation shaft disposed in a direction perpendicular to the suction surface of the suction pad, a rotation driving unit that rotationally drives the rotation shaft, and a radial protrusion at the upper end of the rotation shaft. A first cleaning means provided with a grinding member for cleaning the suction surface of the suction pad, and a work piece that is disposed to project radially from the upper end of the rotating shaft and is sucked and held by the suction pad of the second cleaning means having a flexible member for cleaning the holding surface, one of the cleaning means and the second cleaning means of the first forward and backward in the axial direction of the other cleaning means A positioning means positioned at a cleaning position higher than the upper surface and a retreat position lower than the upper surface of the other cleaning means, and a cleaning water spray nozzle that is arranged to project radially from the upper end of the rotating shaft and jets cleaning water. doing,
A grinding device is provided.

本発明による研削装置に装備される洗浄機構は、被加工物搬出手段の吸着パッドの吸着面を洗浄するための研削部材を備えた第1の洗浄手段と、吸着パッドに吸引保持された被加工物のチャックテーブルに保持されたときの被保持面を洗浄するための柔軟部材を備えた第2の洗浄手段を回転軸に配設し、該回転軸を回転することにより第1の洗浄手段および第2の洗浄手段を回転するように構成したので、洗浄機構全体をコンパクトに構成することができるため、設置場所の制約を受けにくい。
また、本発明による研削装置に装備される洗浄機構は、第1の洗浄手段を構成する研削部材の回転によって吸着パッドの吸着面を洗浄するので、吸着パッドの吸着面が偏磨耗することはない。
更に、本発明による研削装置に装備される洗浄機構は、吸着パッドに吸引保持された被加工物の被保持面を洗浄するための第2の洗浄手段が柔軟部材を備え、この柔軟部材によって吸着パッドに吸引保持された被加工物のチャックテーブルに保持されたときの被保持面を洗浄するので、被加工物の下面に保護テープが貼着されている場合には保護テープの下面である被保持面をスポンジ等の柔軟部材によって洗浄するため、保護テープが剥離することはない。
The cleaning mechanism equipped in the grinding apparatus according to the present invention includes a first cleaning means having a grinding member for cleaning the suction surface of the suction pad of the workpiece unloading means, and a workpiece sucked and held by the suction pad. A second cleaning means having a flexible member for cleaning the surface to be held when the object is held on the chuck table is disposed on the rotary shaft, and the first cleaning means and the first cleaning means by rotating the rotary shaft; Since the second cleaning means is configured to rotate, the entire cleaning mechanism can be configured in a compact manner, so that it is difficult to be restricted by the installation location.
Further, the cleaning mechanism equipped in the grinding apparatus according to the present invention cleans the suction surface of the suction pad by the rotation of the grinding member constituting the first cleaning means, so that the suction surface of the suction pad does not wear unevenly. .
Further, in the cleaning mechanism provided in the grinding apparatus according to the present invention, the second cleaning means for cleaning the held surface of the workpiece sucked and held by the suction pad includes a flexible member, and the flexible member sucks the workpiece. Since the surface to be held when the workpiece held by the pad is held on the chuck table is cleaned , when the protective tape is attached to the lower surface of the workpiece, the surface that is the lower surface of the protective tape is covered. Since the holding surface is washed with a flexible member such as a sponge, the protective tape does not peel off.

以下、本発明に従って構成された研削装置の好適な実施形態について、添付図面を参照して詳細に説明する。   DESCRIPTION OF EMBODIMENTS Hereinafter, a preferred embodiment of a grinding apparatus configured according to the present invention will be described in detail with reference to the accompanying drawings.

図1には本発明に従って構成された研削装置の斜視図が示されている。
図示の実施形態における研削装置は、略直方体状の装置ハウジング2を具備している。装置ハウジング2の図1において右上端には、静止支持板21が立設されている。この静止支持板21の内側面には、上下方向に延びる2対の案内レール22、22および23、23が設けられている。一方の案内レール22、22には荒研削手段としての荒研削ユニット3が上下方向に移動可能に装着されており、他方の案内レール23、23には仕上げ研削手段としての仕上げ研削ユニット4が上下方向に移動可能に装着されている。
FIG. 1 shows a perspective view of a grinding apparatus constructed in accordance with the present invention.
The grinding device in the illustrated embodiment includes a device housing 2 having a substantially rectangular parallelepiped shape. A stationary support plate 21 is erected on the upper right end of the device housing 2 in FIG. Two pairs of guide rails 22, 22 and 23, 23 extending in the vertical direction are provided on the inner surface of the stationary support plate 21. A rough grinding unit 3 as rough grinding means is mounted on one guide rail 22, 22 so as to be movable in the vertical direction, and a finish grinding unit 4 as finish grinding means is vertically installed on the other guide rail 23, 23. It is mounted to move in the direction.

荒研削ユニット3は、ユニットハウジング31と、該ユニットハウジング31の下端に回転自在に装着されたホイールマウント32に装着された荒研削ホイール33と、該ユニットハウジング31の上端に装着されホイールマウント32を矢印32aで示す方向に回転せしめる電動モータ34と、ユニットハウジング31を装着し上記案内レール22、22に沿って移動可能に配設された移動基台35とを具備している。   The rough grinding unit 3 includes a unit housing 31, a rough grinding wheel 33 attached to a wheel mount 32 rotatably attached to the lower end of the unit housing 31, and a wheel mount 32 attached to the upper end of the unit housing 31. An electric motor 34 that rotates in a direction indicated by an arrow 32a, and a moving base 35 that is mounted with the unit housing 31 and is movable along the guide rails 22 and 22 are provided.

上記移動基台35には被案内レール351、351が設けられており、この被案内レール351、351を上記静止支持板21に設けられた案内レール22、22に移動可能に嵌合することにより、荒研削ユニット3が上下方向に移動可能に支持される。図示の形態における荒研削ユニット3は、上記移動基台35を案内レール22、22に沿って移動させ研削ホイール33を研削送りする研削送り機構36を具備している。研削送り機構36は、上記静止支持板21に案内レール22、22と平行に上下方向に配設され回転可能に支持された雄ねじロッド361と、該雄ねじロッド361を回転駆動するためのパルスモータ362と、上記移動基台35に装着され雄ねじロッド361と螺合する図示しない雌ねじブロックを具備しており、パルスモータ362によって雄ねじロッド361を正転および逆転駆動することにより、荒研削ユニット3を上下方向(後述するチャックテーブルの保持面に対して垂直な方向)に移動せしめる。   The movable base 35 is provided with guided rails 351 and 351, and the guided rails 351 and 351 are movably fitted to the guide rails 22 and 22 provided on the stationary support plate 21. The rough grinding unit 3 is supported so as to be movable in the vertical direction. The rough grinding unit 3 in the form shown in the figure includes a grinding feed mechanism 36 that moves the moving base 35 along the guide rails 22 and 22 and feeds the grinding wheel 33 by grinding. The grinding feed mechanism 36 includes a male screw rod 361 that is disposed on the stationary support plate 21 in a vertical direction parallel to the guide rails 22 and 22 and is rotatably supported, and a pulse motor 362 for rotationally driving the male screw rod 361. And a female screw block (not shown) that is mounted on the moving base 35 and is screwed with the male screw rod 361. By driving the male screw rod 361 forward and reverse by a pulse motor 362, the rough grinding unit 3 is moved up and down. It is moved in the direction (direction perpendicular to the holding surface of the chuck table described later).

上記仕上げ研削ユニット4も荒研削ユニット3と同様に構成されており、ユニットハウジング41と、該ユニットハウジング41の下端に回転自在に装着されたホイールマウント42に装着された研削ホイール43と、該ユニットハウジング41の上端に装着されホイールマウント42を矢印42aで示す方向に回転せしめる電動モータ44と、ユニットハウジング41を装着し上記案内レール23、232に沿って移動可能に配設された移動基台45とを具備している。   The finish grinding unit 4 is also configured in the same manner as the rough grinding unit 3, and includes a unit housing 41, a grinding wheel 43 attached to a wheel mount 42 rotatably attached to a lower end of the unit housing 41, and the unit. An electric motor 44 that is mounted on the upper end of the housing 41 and rotates the wheel mount 42 in the direction indicated by the arrow 42a, and a moving base 45 that is mounted on the unit housing 41 and is movable along the guide rails 23 and 232. It is equipped with.

上記移動基台45には被案内レール451、451が設けられており、この被案内レール451、451を上記静止支持板21に設けられた案内レール23、23に移動可能に嵌合することにより、仕上げ研削ユニット4が上下方向に移動可能に支持される。図示の形態における仕上げ研削ユニット4は、上記移動基台45を案内レール23、23に沿って移動させ研削ホイール43を研削送りする送り機構46を具備している。送り機構46は、上記静止支持板21に案内レール23、23と平行に上下方向に配設され回転可能に支持された雄ねじロッド461と、該雄ねじロッド461を回転駆動するためのパルスモータ462と、上記移動基台45に装着され雄ねじロッド461と螺合する図示しない雌ねじブロックを具備しており、パルスモータ462によって雄ねじロッド461を正転および逆転駆動することにより、仕上げ研削ユニット4を上下方向(後述するチャックテーブルの保持面に対して垂直な方向)に移動せしめる。   Guided rails 451 and 451 are provided on the moving base 45, and the guided rails 451 and 451 are movably fitted to the guide rails 23 and 23 provided on the stationary support plate 21. The finish grinding unit 4 is supported so as to be movable in the vertical direction. The finish grinding unit 4 in the illustrated form includes a feed mechanism 46 that moves the moving base 45 along the guide rails 23 and 23 and feeds the grinding wheel 43 by grinding. The feed mechanism 46 includes a male screw rod 461 that is disposed on the stationary support plate 21 in parallel with the guide rails 23 and 23 in a vertical direction and is rotatably supported, and a pulse motor 462 for rotationally driving the male screw rod 461. , A female screw block (not shown) mounted on the moving base 45 and screwed with the male screw rod 461 is provided, and the male screw rod 461 is driven forward and reverse by a pulse motor 462 to move the finish grinding unit 4 in the vertical direction. It is moved in a direction (perpendicular to the holding surface of the chuck table described later).

図示の実施形態における研削装置は、上記静止支持板21の前側において装置ハウジング2に回転可能に配設されたターンテーブル5を具備している。このターンテーブル5は、比較的大径の円盤状に形成されており、図示しない回転駆動機構によって矢印5aで示す方向に適宜回転せしめられる。ターンテーブル5には、図示の実施形態の場合それぞれ120度の位相角をもって3個のチャックテーブル6が水平面内で回転可能に配置されている。このチャックテーブル6は、円盤状の基台61とポーラスセラミック材によって円盤状に形成され吸着保持チャック62とからなっており、吸着保持チャック62の上面(保持面)に載置された被加工物を図示しない吸引手段を作動することにより吸引保持する。このように構成されたチャックテーブル6は、図1に示すように図示しない回転駆動機構によって矢印6aで示す方向に回転せしめられる。ターンテーブル5に配設された3個のチャックテーブル6は、ターンテーブル5が適宜回転することにより被加工物搬入・搬出域A、荒研削加工域B、および仕上げ研削加工域Cおよび被加工物搬入・搬出域Aに順次移動せしめられる。   The grinding apparatus in the illustrated embodiment includes a turntable 5 rotatably disposed in the apparatus housing 2 on the front side of the stationary support plate 21. The turntable 5 is formed in a relatively large-diameter disk shape, and is appropriately rotated in a direction indicated by an arrow 5a by a rotation driving mechanism (not shown). In the illustrated embodiment, three chuck tables 6 are arranged on the turntable 5 so as to be rotatable in a horizontal plane with a phase angle of 120 degrees. The chuck table 6 includes a disk-shaped base 61 and a suction holding chuck 62 formed in a disk shape by a porous ceramic material, and a work piece placed on the upper surface (holding surface) of the suction holding chuck 62. Is sucked and held by operating a suction means (not shown). The chuck table 6 configured as described above is rotated in a direction indicated by an arrow 6a by a rotation driving mechanism (not shown) as shown in FIG. The three chuck tables 6 arranged on the turntable 5 have a workpiece loading / unloading zone A, a rough grinding zone B, a finish grinding zone C, and a workpiece by appropriately rotating the turntable 5. It is sequentially moved to the loading / unloading area A.

図示の実施形態における研削装置は、被加工物搬入・搬出域Aに対して一方側に配設され研削加工前の被加工物である半導体ウエーハをストックする第1のカセット11と、被加工物搬入・搬出域Aに対して他方側に配設され研削加工後の被加工物である半導体ウエーハをストックする第2のカセット12と、第1のカセット11と被加工物搬入・搬出域Aとの間に配設され被加工物の中心合わせを行う中心合わせ手段13と、被加工物搬入・搬出域Aと第2のカセット12との間に配設されたスピンナー洗浄手段14と、第1のカセット7内に収納された被加工物である半導体ウエーハを中心合わせ手段13に搬出するとともにスピンナー洗浄手段14で洗浄された半導体ウエーハを第2のカセット12に搬送する被加工物搬送手段15と、中心合わせ手段13上に載置され中心合わせされた半導体ウエーハを被加工物搬入・搬出域Aに位置付けられたチャックテーブル6上に搬送する被加工物搬入手段16と、被加工物搬入・搬出域Aに位置付けられたチャックテーブル6上に載置されている研削加工後の半導体ウエーハをスピンナー洗浄手段14に搬送する被加工物搬出手段7を具備している。なお、上記第1のカセット11には、半導体ウエーハWが表面に保護テープTが貼着された状態で複数枚収容される。このとき、半導体ウエーハWは、裏面(被研削面)を上側にして収容される。   The grinding apparatus in the illustrated embodiment includes a first cassette 11 that is disposed on one side with respect to a workpiece loading / unloading area A and stocks a semiconductor wafer that is a workpiece before grinding, and a workpiece. A second cassette 12 which is disposed on the other side with respect to the carry-in / carry-out area A and stocks a semiconductor wafer which is a workpiece after grinding; a first cassette 11 and a work-carry-in / carry-out area A; A centering means 13 for centering the workpiece disposed between the two, the spinner cleaning means 14 disposed between the workpiece loading / unloading area A and the second cassette 12; A workpiece transporting means 15 for transporting the semiconductor wafer, which is a workpiece stored in the cassette 7, to the centering means 13 and transporting the semiconductor wafer cleaned by the spinner cleaning means 14 to the second cassette 12; Workpiece carry-in means 16 for carrying the semiconductor wafer placed on the centering means 13 and centered on the chuck table 6 positioned in the work-piece carrying-in / out area A, and the work-piece carrying-in / out area A workpiece unloading means 7 is provided for conveying the ground semiconductor wafer placed on the chuck table 6 positioned at A to the spinner cleaning means 14. Note that a plurality of semiconductor wafers W are accommodated in the first cassette 11 in a state where the protective tape T is adhered to the surface. At this time, the semiconductor wafer W is accommodated with the back surface (surface to be ground) facing upward.

ここで、上記被加工物搬出手段7について、図2を参照して説明する。
図2に示す被加工物搬出手段7は、L字状の作動アーム71を備えている。このL字状の作動アーム71は垂直部711と水平部712とからなっており、垂直部711の下端が昇降機構72に連結されている。昇降機構72は例えばエアピストン等からなっており、作動アーム71を図2において矢印72aで示すように上下方向に作動せしめる。また、作動アーム71の垂直部711と連結した昇降機構72は、正転・逆転可能な電動モータを含む旋回機構73に連結されている。従って、旋回機構73を正転方向または逆転方向に駆動することにより、作動アーム71は垂直部711を中心として揺動せしめられる。この結果、作動アーム71の水平部712は水平面内で作動せしめられ、この水平部712の先端部に装着される吸着パッド74が水平面内で作動せしめられる。即ち、吸着パッド74は、チャックテーブル6とスピンナー洗浄手段14との間において垂直部711を中心とした円弧からなる吸着パッドの搬出経路に沿って移動せしめられる。
Here, the workpiece unloading means 7 will be described with reference to FIG.
The workpiece unloading means 7 shown in FIG. 2 includes an L-shaped operating arm 71. The L-shaped operating arm 71 includes a vertical portion 711 and a horizontal portion 712, and the lower end of the vertical portion 711 is connected to the lifting mechanism 72. The elevating mechanism 72 is composed of, for example, an air piston, etc., and operates the operating arm 71 in the vertical direction as shown by an arrow 72a in FIG. Further, the lifting mechanism 72 connected to the vertical portion 711 of the operating arm 71 is connected to a turning mechanism 73 including an electric motor capable of normal rotation and reverse rotation. Therefore, by driving the turning mechanism 73 in the forward rotation direction or the reverse rotation direction, the operating arm 71 is swung around the vertical portion 711. As a result, the horizontal portion 712 of the operating arm 71 is operated in the horizontal plane, and the suction pad 74 attached to the tip of the horizontal portion 712 is operated in the horizontal plane. That is, the suction pad 74 is moved between the chuck table 6 and the spinner cleaning means 14 along a suction pad carry-out path formed of an arc centered on the vertical portion 711.

上記作動アーム71の水平部712の先端部に装着される吸着パッド74は、図2に示すように円盤状の基台741とパッド742とからなっている。基台741は適宜の金属材によって構成され、その上面中央部には支持軸部741aが突出して形成されており、この支持軸部741aが作動アーム71を構成する水平部712の先端部に装着される。支持軸部741aの上端には係止部741bが設けられており、この係止部741bが水平部712に形成された係合部712aと係合するようになっている。なお、基台741の上面と作動アーム71を構成する水平部712との間には圧縮コイルばね75が配設され、基台741を下方に向けて付勢している。   The suction pad 74 attached to the tip of the horizontal portion 712 of the operating arm 71 includes a disk-shaped base 741 and a pad 742 as shown in FIG. The base 741 is made of an appropriate metal material, and a support shaft portion 741a is formed to protrude from the center of the upper surface, and this support shaft portion 741a is attached to the distal end portion of the horizontal portion 712 constituting the operating arm 71. Is done. A locking portion 741b is provided at the upper end of the support shaft portion 741a, and the locking portion 741b is engaged with an engagement portion 712a formed on the horizontal portion 712. A compression coil spring 75 is disposed between the upper surface of the base 741 and the horizontal portion 712 constituting the operating arm 71 and biases the base 741 downward.

吸着パッド74を構成する基台741は、下方が開放された円形状の凹部741cを備えている。この凹部741cにポーラスなセラミックス部材によって円盤状に形成されたパッド742が嵌合されている。このようにして基台741の凹部741cに嵌合されたパッド742の下面は、被加工物を吸引保持する吸着面として機能する。吸着パッド74を構成する基台741に形成された円形状の凹部741cは、支持軸部741aに設けられた連通路741dを介して作動アーム71内に配設されたフレキシブルパイプ等の配管76に接続されている。なお、配管76は図示しない吸引手段に接続されている。従って、図示しない吸引手段が作動すると、配管76、連通路741d、基台741の凹部741cを介してパッド742の下面(吸着面)に負圧が作用せしめられ、該パッド742の下面(吸着面)に被加工物を吸引保持することができる。   The base 741 constituting the suction pad 74 includes a circular recess 741c that is open at the bottom. A pad 742 formed in a disk shape by a porous ceramic member is fitted into the recess 741c. In this way, the lower surface of the pad 742 fitted in the recess 741c of the base 741 functions as a suction surface for sucking and holding the workpiece. A circular recess 741c formed in the base 741 constituting the suction pad 74 is connected to a pipe 76 such as a flexible pipe provided in the operating arm 71 via a communication path 741d provided in the support shaft 741a. It is connected. The pipe 76 is connected to suction means (not shown). Therefore, when the suction means (not shown) is operated, negative pressure is applied to the lower surface (suction surface) of the pad 742 via the pipe 76, the communication path 741d, and the recess 741c of the base 741, and the lower surface (suction surface) of the pad 742 ) The workpiece can be sucked and held.

図1に戻って説明を続けると、図示の実施形態における研削装置は、上記被加工物搬出手段7を構成する吸着パッド74の搬出経路上に配置され吸着パッド74に保持された被加工物の下面(被保持面)を洗浄するとともに吸着パッド74の下面(吸着面)を洗浄するための洗浄機構8を具備している。この洗浄機構8について、図3および図4を参照して説明する。   Referring back to FIG. 1, the description of the grinding apparatus in the illustrated embodiment is that the workpiece held by the suction pad 74 is disposed on the suction path of the suction pad 74 that constitutes the workpiece discharge means 7. A cleaning mechanism 8 for cleaning the lower surface (held surface) and the lower surface (suction surface) of the suction pad 74 is provided. The cleaning mechanism 8 will be described with reference to FIGS. 3 and 4.

図3および図4に示す洗浄機構8は、装置ハウジング2の上板25に配設された円筒状の支持部材81と、該円筒状の支持部材81に回転可能に支持される回転軸82と、該回転軸82を回転駆動する回転駆動手段83と、回転軸82の上端部に径方向に突出して取り付けられ上記吸着パッド74の下面(吸着面)を洗浄するための第1の洗浄手段84と、回転軸82の上端部に径方向に突出して取り付けられ吸着パッド74の下面(吸着面)に吸引保持された被加工物の被保持面を洗浄するための第2の洗浄手段85と、第1の洗浄手段84に対して第2の洗浄手段85を軸方向に進退し洗浄位置と退避位置に位置付ける位置付け手段86と、回転軸82の上端部に径方向に突出して取り付けられ洗浄水を噴射する2個の洗浄水噴射ノズル87、87とを具備している。   The cleaning mechanism 8 shown in FIGS. 3 and 4 includes a cylindrical support member 81 disposed on the upper plate 25 of the apparatus housing 2, and a rotary shaft 82 rotatably supported by the cylindrical support member 81. Rotational drive means 83 for rotationally driving the rotary shaft 82; and first cleaning means 84 for cleaning the lower surface (suction surface) of the suction pad 74 attached to the upper end portion of the rotary shaft 82 in a radial direction. And a second cleaning means 85 for cleaning the holding surface of the work piece attached to the upper end portion of the rotating shaft 82 so as to protrude in the radial direction and sucked and held on the lower surface (suction surface) of the suction pad 74; Positioning means 86 for moving the second cleaning means 85 forward and backward in the axial direction relative to the first cleaning means 84 and positioning the second cleaning means 85 at the cleaning position and the retracted position; Two washing water spray nozzles to spray It is and a 7,87.

上記円筒状の支持部材81は、同一径からなる貫通穴811を有しており、装置ハウジング2の上板25に軸方向が上記被加工物搬出手段7を構成する吸着パッド74の下面(吸着面)に垂直な方向に配設され適宜の固定手段によって取り付けられる。なお、装置ハウジング2の上板25における支持部材81の取り付け部には貫通穴811と同径の穴(図示せず)が設けられている。円筒状の支持部材81には、貫通穴811の内周面に開口する洗浄水供給穴812が設けられているとともに、貫通穴811の内周面に洗浄水供給穴812と連通する環状通路(図示せず)が形成されている。なお、上記洗浄水供給穴812は、図示しない洗浄水供給手段に接続されている。   The cylindrical support member 81 has a through hole 811 having the same diameter, and the axial direction of the upper plate 25 of the apparatus housing 2 is the lower surface (suction) of the suction pad 74 constituting the workpiece unloading means 7. And is attached by appropriate fixing means. Note that a hole (not shown) having the same diameter as the through hole 811 is provided in the attachment portion of the support member 81 on the upper plate 25 of the apparatus housing 2. The cylindrical support member 81 is provided with a cleaning water supply hole 812 that opens to the inner peripheral surface of the through hole 811, and an annular passage that communicates with the cleaning water supply hole 812 on the inner peripheral surface of the through hole 811 ( (Not shown) is formed. The cleaning water supply hole 812 is connected to a cleaning water supply means (not shown).

上記回転軸82は、上記円筒状の支持部材81の貫通穴811の内径より僅かに小さい外径を有し、中心に軸方向に貫通する貫通穴821が設けられている。回転軸82の上端部には大径の取り付け部822が設けられており、下端部には被駆動プーリ823が設けられている。この回転軸82は、上記円筒状の支持部材81の貫通穴811に上側から嵌合し、取り付け部822が円筒状の支持部材81の上端に支持される。従って、円筒状の支持部材81の貫通穴811に嵌合された回転軸82は、軸方向が上記被加工物搬出手段7を構成する吸着パッド74の下面(吸着面)に垂直な方向に配設されることになる。このようにして、円筒状の支持部材81の貫通穴811に嵌合された回転軸82は、円筒状の支持部材81との間に配設された図示しない軸受けによって回転可能に支持される。なお、回転軸82が円筒状の支持部材81の貫通穴811に嵌合された状態において、図4に示すように回転軸82の下端部に設けられた被駆動プーリ823が円筒状の支持部材81の下端より下方に突出するように構成されている。また、回転軸82の外周面には回転軸82が円筒状の支持部材81の貫通穴811に嵌合された状態において、上記円筒状の支持部材81の内周面に形成された図示しない環状通路と連通する2個の連通穴824、824が設けられている。   The rotating shaft 82 has an outer diameter slightly smaller than the inner diameter of the through hole 811 of the cylindrical support member 81, and a through hole 821 penetrating in the axial direction is provided at the center. A large-diameter attachment portion 822 is provided at the upper end portion of the rotating shaft 82, and a driven pulley 823 is provided at the lower end portion. The rotating shaft 82 is fitted into the through hole 811 of the cylindrical support member 81 from above, and the attachment portion 822 is supported by the upper end of the cylindrical support member 81. Therefore, the rotary shaft 82 fitted in the through hole 811 of the cylindrical support member 81 is arranged in a direction in which the axial direction is perpendicular to the lower surface (suction surface) of the suction pad 74 constituting the workpiece unloading means 7. Will be established. In this way, the rotating shaft 82 fitted in the through hole 811 of the cylindrical support member 81 is rotatably supported by a bearing (not shown) disposed between the cylindrical support member 81. In the state where the rotary shaft 82 is fitted in the through hole 811 of the cylindrical support member 81, the driven pulley 823 provided at the lower end of the rotary shaft 82 is a cylindrical support member as shown in FIG. It is comprised so that it may protrude below from the lower end of 81. FIG. An annular ring (not shown) formed on the inner peripheral surface of the cylindrical support member 81 in a state where the rotary shaft 82 is fitted in the through hole 811 of the cylindrical support member 81 on the outer peripheral surface of the rotary shaft 82. Two communication holes 824 and 824 communicating with the passage are provided.

上記回転軸82を回転駆動するための回転駆動手段83は、図4に示すように電動モータ831と、該電動モータ831の駆動軸に装着された駆動プーリ832と、該駆動プーリ832と上記回転軸82の下端部に設けられた被駆動プーリ823とを捲回する無端ベルト833とからなっている。このように構成された回転駆動手段83は、電動モータ831を駆動することにより駆動プーリ832、無端ベルト833および被駆動プーリ823を介して回転軸82を回転せしめる。   As shown in FIG. 4, the rotational drive means 83 for rotationally driving the rotational shaft 82 includes an electric motor 831, a drive pulley 832 mounted on the drive shaft of the electric motor 831, the drive pulley 832, and the rotation An endless belt 833 that winds a driven pulley 823 provided at the lower end of the shaft 82. The rotation driving means 83 configured as described above rotates the rotating shaft 82 via the driving pulley 832, the endless belt 833 and the driven pulley 823 by driving the electric motor 831.

上記第1の洗浄手段84は、回転軸82の上端部に設けられた取り付け部822の上端に互いに180度の位相角をもって配設された2個の保持部材841、841と、該2個の保持部材841、841の上面にそれぞれ装着された研削部材842、842とからなっている。保持部材841、841は直方体状に形成されており、その長辺が径方向に向けて互いに所定の間隔を設けて配設されている。研削部材842、842はセラミックス材やオイルストーン等によって上記保持部材841、841の上面に対応する直方体状に形成されており、保持部材841、841の上面にそれぞれ適宜の接着剤によって装着されている。このように構成された第1の洗浄手段84の保持部材841、841の上面に装着された研削部材842、842は、回転軸82が回転することによって水平面内で回転せしめられる。   The first cleaning means 84 includes two holding members 841 and 841 disposed at the upper end of a mounting portion 822 provided at the upper end portion of the rotating shaft 82 with a phase angle of 180 degrees, and the two holding members 841 and 841. Grinding members 842 and 842 mounted on the upper surfaces of the holding members 841 and 841, respectively. The holding members 841 and 841 are formed in a rectangular parallelepiped shape, and their long sides are arranged at a predetermined interval from each other in the radial direction. The grinding members 842 and 842 are formed in a rectangular parallelepiped shape corresponding to the upper surfaces of the holding members 841 and 841 using a ceramic material, an oil stone, or the like, and are attached to the upper surfaces of the holding members 841 and 841 with appropriate adhesives. . The grinding members 842 and 842 mounted on the upper surfaces of the holding members 841 and 841 of the first cleaning unit 84 configured as described above are rotated in a horizontal plane by the rotation of the rotating shaft 82.

上記第2の洗浄手段85は、直方体状に形成された保持部材851と、該保持部材851の上面に装着された柔軟部材852と、該保持部材851の中央下面に装着された支持ロッド853と、該支持ロッド853の側方に180度の位相角をもって配設され保持部材851の下面に取り付けられた2個の被駆動ピン854、854とからなっている。保持部材851は、その幅が上記第1の洗浄手段84を構成する2個の保持部材841と841との間に入る寸法に形成されており、その長さが上記第1の洗浄手段84を構成する2個の保持部材841と841の外端間の距離に相当する寸法に形成されている。また、保持部材851の厚みは、上記第1の洗浄手段84を構成する2個の保持部材841、841の厚みより薄い寸法に形成されている。上記柔軟部材852はスポンジ材によって上記保持部材851の上面に対応する直方体状に形成されており、その厚みは上記第1の洗浄手段84を構成する研削部材842、842の厚みと略同じ寸法に形成されている。上記支持ロッド853は上記回転軸82に設けられた貫通穴821の内径より僅かに小さい外径を有し、貫通穴821に軸方向に摺動可能に嵌合される。上記2個の被駆動ピン854、854は、上記回転軸82の上端に貫通穴821を挟んで180度の位相角をもって開口する2個の駆動穴825、525にそれぞれ嵌合せしめられる。従って、回転軸82が回転すると駆動穴825、525および被駆動ピン854、854を介して第2の洗浄手段85は回転せしめられ、保持部材851の上面に装着された柔軟部材852が水平面内で回転せしめられる。このように構成された第2の洗浄手段85は、支持ロッド853が貫通穴821に嵌合するとともに駆動ピン854、854が駆動穴825、525にそれぞれ嵌合した状態においては、柔軟部材852の上面が上記第1の洗浄手段84を構成する研削部材842、842の上面より低い退避位置に位置付けられている。   The second cleaning means 85 includes a holding member 851 formed in a rectangular parallelepiped shape, a flexible member 852 attached to the upper surface of the holding member 851, and a support rod 853 attached to the lower center surface of the holding member 851. And two driven pins 854 and 854 that are disposed on the side of the support rod 853 with a phase angle of 180 degrees and are attached to the lower surface of the holding member 851. The holding member 851 has a width that is between the two holding members 841 and 841 constituting the first cleaning means 84, and the length of the holding member 851 is the same as that of the first cleaning means 84. The two holding members 841 and 841 are formed in dimensions corresponding to the distance between the outer ends. The holding member 851 is formed to have a thickness smaller than the thickness of the two holding members 841 and 841 constituting the first cleaning means 84. The flexible member 852 is formed of a sponge material in a rectangular parallelepiped shape corresponding to the upper surface of the holding member 851, and the thickness thereof is approximately the same as the thickness of the grinding members 842 and 842 constituting the first cleaning means 84. Is formed. The support rod 853 has an outer diameter slightly smaller than the inner diameter of the through hole 821 provided in the rotating shaft 82, and is fitted to the through hole 821 so as to be slidable in the axial direction. The two driven pins 854 and 854 are respectively fitted into two driving holes 825 and 525 opened at a phase angle of 180 degrees with the through hole 821 sandwiched between the upper ends of the rotating shaft 82. Accordingly, when the rotation shaft 82 rotates, the second cleaning means 85 is rotated through the drive holes 825 and 525 and the driven pins 854 and 854, and the flexible member 852 mounted on the upper surface of the holding member 851 is within the horizontal plane. It can be rotated. The second cleaning means 85 configured in this way has the flexible member 852 in a state where the support rod 853 is fitted in the through hole 821 and the drive pins 854 and 854 are fitted in the drive holes 825 and 525, respectively. The upper surface is positioned at a retracted position lower than the upper surfaces of the grinding members 842 and 842 constituting the first cleaning means 84.

上記位置付け手段86は、図示の実施形態においては上記回転軸82の下方に配設されたエアシリンダ861からなり、そのピストンロッド862が回転軸82の中心に設けられた貫通穴821に嵌合された支持ロッド853の下端面に当接するように構成されている。従って、エアシリンダ861が作動していない状態では、第2の洗浄手段85の柔軟部材852の上面が上記第1の洗浄手段84を構成する研削部材842、842の上面より低い退避位置に位置付けられており、エアシリンダ861が作動してピストンロッド862が上昇すると支持ロッド853が押し上げられ、第2の洗浄手段85を構成する柔軟部材852の上面が上記第1の洗浄手段84を構成する研削部材842、842の上面より高い洗浄位置に位置付けられるようになっている。   In the illustrated embodiment, the positioning means 86 includes an air cylinder 861 disposed below the rotary shaft 82, and the piston rod 862 is fitted into a through hole 821 provided at the center of the rotary shaft 82. The support rod 853 is configured to contact the lower end surface. Therefore, when the air cylinder 861 is not in operation, the upper surface of the flexible member 852 of the second cleaning means 85 is positioned at a retracted position lower than the upper surfaces of the grinding members 842 and 842 constituting the first cleaning means 84. When the air cylinder 861 is actuated to raise the piston rod 862, the support rod 853 is pushed up, and the upper surface of the flexible member 852 constituting the second cleaning means 85 is the grinding member constituting the first cleaning means 84 842 and 842 are positioned higher than the upper surface of the cleaning.

上記洗浄水噴射ノズル87、87は、図3に示すように回転軸82の上端部に設けられた取り付け部822の上端に互いに180度の位相角をもって径方向に突出して配設されている。この洗浄水噴射ノズル87、87は、上方に向けて開口する複数の噴出口871、871を備えており、上記回転軸82に設けられた連通穴824、824と図示しない連通路を介して連通されている。   As shown in FIG. 3, the washing water spray nozzles 87 and 87 are disposed so as to protrude in the radial direction with a phase angle of 180 degrees from the upper end of a mounting portion 822 provided at the upper end portion of the rotating shaft 82. The washing water injection nozzles 87 and 87 are provided with a plurality of outlets 871 and 871 that open upward, and communicate with the communication holes 824 and 824 provided in the rotating shaft 82 via a communication path (not shown). Has been.

図示の実施形態における研削装置は以上のように構成されており、以下その作用について説明する。
第1のカセット11に収容された研削加工前の被加工物である半導体ウエーハWは被加工物搬送手段15によって中心合わせ手段13に搬送され、ここで中心合わせされる。中心合わせ手段13で中心合わせされた半導体ウエーハWは、被加工物搬入手段16の旋回動作によって被加工物搬入・搬出域Aに位置付けられたチャックテーブル6の吸着保持チャック62上に載置される。そして、図示しない吸引手段を作動して、半導体ウエーハWを吸着保持チャック62上に吸引保持する。次に、ターンテーブル5を図示しない回転駆動機構によって矢印5aで示す方向に120度回動せしめて、半導体ウエーハWを載置したチャックテーブル6を荒研削加工域Bに位置付ける。
The grinding apparatus in the illustrated embodiment is configured as described above, and the operation thereof will be described below.
The semiconductor wafer W, which is the workpiece before grinding, contained in the first cassette 11 is conveyed to the centering means 13 by the workpiece conveying means 15 and is centered here. The semiconductor wafer W centered by the centering means 13 is placed on the chucking / holding chuck 62 of the chuck table 6 positioned in the workpiece loading / unloading area A by the turning operation of the workpiece loading means 16. . Then, a suction means (not shown) is operated to suck and hold the semiconductor wafer W on the suction holding chuck 62. Next, the turntable 5 is rotated 120 degrees in the direction indicated by the arrow 5a by a rotation drive mechanism (not shown), and the chuck table 6 on which the semiconductor wafer W is placed is positioned in the rough grinding region B.

半導体ウエーハWを吸引保持したチャックテーブル6は、荒研削加工域Bに位置付けられると図示しない回転駆動機構によって矢印6aで示す方向に回転せしめられる。一方、荒研削ユニット3の研削ホイール33は、矢印32aで示す方向に回転せしめられつつ研削送り機構36によって所定量下降する。この結果、チャックテーブル6上の半導体ウエーハWの裏面(上面)である被研削面に荒研削加工が施される。なお、この間に被加工物搬入・搬出域Aに位置付けられた次のチャックテーブル6上には、上述したように研削加工前の半導体ウエーハWが載置される。そして、チャックテーブル6上に載置された半導体ウエーハWは、図示しない吸引手段を作動することによりチャックテーブル6上に吸引保持される。次に、ターンテーブル5を矢印5aで示す方向に120度回動せしめて、荒研削加工された半導体ウエーハWを保持しているチャックテーブル6を仕上げ研削加工域Cに位置付け、研削加工前の半導体ウエーハWを保持したチャックテーブル6を荒研削加工域Bに位置付ける。   When the chuck table 6 holding the semiconductor wafer W by suction is positioned in the rough grinding area B, the chuck table 6 is rotated in the direction indicated by the arrow 6a by a rotation drive mechanism (not shown). On the other hand, the grinding wheel 33 of the rough grinding unit 3 is lowered by a predetermined amount by the grinding feed mechanism 36 while being rotated in the direction indicated by the arrow 32a. As a result, rough grinding is performed on the surface to be ground which is the back surface (upper surface) of the semiconductor wafer W on the chuck table 6. During this time, the semiconductor wafer W before grinding is placed on the next chuck table 6 positioned in the work carry-in / carry-out area A as described above. The semiconductor wafer W placed on the chuck table 6 is sucked and held on the chuck table 6 by operating a suction means (not shown). Next, the turntable 5 is rotated 120 degrees in the direction indicated by the arrow 5a, the chuck table 6 holding the semiconductor wafer W subjected to rough grinding is positioned in the finish grinding area C, and the semiconductor before grinding is processed. The chuck table 6 holding the wafer W is positioned in the rough grinding area B.

このようにして、荒研削加工域Bに位置付けられたチャックテーブル6上に保持された荒研削加工前の半導体ウエーハWの裏面(上面)である被研削面には荒研削ユニット3によって荒研削加工が施され、仕上げ研削加工域Cに位置付けられたチャックテーブル6上に保持され荒研削加工された半導体ウエーハWの裏面(上面)である被研削面には仕上げ研削ユニット4によって仕上げ研削加工が施される。次に、ターンテーブル5を矢印5aで示す方向に120度回動せしめて、仕上げ研削加工された半導体ウエーハWを保持したチャックテーブル6を被加工物搬入・搬出域Aに位置付ける。なお、荒研削加工域Bにおいて荒研削加工された半導体ウエーハWを保持したチャックテーブル6は仕上げ研削加工域Cに、被加工物搬入・搬出域Aにおいて研削加工前の半導体ウエーハWを保持したチャックテーブル6は荒研削加工域Bにそれぞれ移動せしめられる。   In this way, the rough grinding unit 3 performs rough grinding on the surface to be ground, which is the back surface (upper surface) of the semiconductor wafer W before rough grinding held on the chuck table 6 positioned in the rough grinding region B. The surface to be ground, which is the back surface (upper surface) of the semiconductor wafer W held on the chuck table 6 positioned in the finish grinding region C and subjected to rough grinding, is subjected to finish grinding by the finish grinding unit 4. Is done. Next, the turntable 5 is rotated 120 degrees in the direction indicated by the arrow 5a, and the chuck table 6 holding the semiconductor wafer W subjected to finish grinding is positioned in the workpiece loading / unloading area A. The chuck table 6 holding the semiconductor wafer W rough-ground in the rough grinding zone B is held in the finish grinding zone C, and the chuck holding the semiconductor wafer W before grinding in the workpiece loading / unloading zone A. The table 6 is moved to the rough grinding area B, respectively.

上述したように、荒研削加工域Bおよび仕上げ研削加工域Cを経由して被加工物搬入・搬出域Aに戻ったチャックテーブル6は、ここで仕上げ研削加工された半導体ウエーハWの吸引保持を解除する。次に、被加工物搬出手段7を作動して被加工物搬入・搬出域Aに位置付けられたチャックテーブル6上において吸引保持が解除された研削加工後の半導体ウエーハWの裏面(上面)である被研削面を吸着パッド74のパッド742の下面である吸着面に吸引保持する。そして、被加工物搬出手段7の旋回機構73を作動して半導体ウエーハWを吸引保持した吸着パッド74を洗浄機構8の直上に位置付ける。次に、洗浄機構8の回転駆動手段83を作動して回転軸82を回転するとともに、位置付け手段86を構成するエアシリンダ861を作動して、図5に示すように第2の洗浄手段85の柔軟部材852の上面が第1の洗浄手段84を構成する研削部材842、842の上面より高い洗浄位置に位置付け、柔軟部材852を吸着パッド74に吸引保持された半導体ウエーハWの表面(下面)に貼着されている保護テープTの下面である被保持面に接触させる。このとき、洗浄機構8の図示しない洗浄水供給手段を作動して洗浄水噴射ノズル87、87の噴出口871、871から保護テープTの下面である被保持面に向けて洗浄水を噴射せしめる。回転軸82が回転すると、上述したように回転軸82に取り付けられた第1の洗浄手段84および第2の洗浄手段85が回転し、第2の洗浄手段85の柔軟部材852によって吸着パッド74に吸引保持された半導体ウエーハWの表面(下面)に貼着されている保護テープTの下面である被保持面に付着している研削屑が洗浄され除去される(保護テープ洗浄工程)。この保護テープ洗浄工程においては、被加工物搬出手段7の旋回機構73を作動して作動アーム71を垂直部711を中心として揺動し、作動アーム71に取り付けられた吸着パッド74を所定の範囲で揺動することが望ましい。以上のように保護テープ洗浄工程においては、半導体ウエーハWの表面(下面)に貼着されている保護テープTの下面である被保持面をスポンジ等の柔軟部材852によって洗浄するので、保護テープTが剥離することはない。   As described above, the chuck table 6 that has returned to the workpiece loading / unloading area A via the rough grinding area B and the finish grinding area C holds and holds the semiconductor wafer W that has been subjected to finish grinding. To release. Next, it is a back surface (upper surface) of the semiconductor wafer W after the grinding process in which the suction holding is released on the chuck table 6 positioned in the workpiece loading / unloading area A by operating the workpiece unloading means 7. The surface to be ground is sucked and held on the suction surface which is the lower surface of the pad 742 of the suction pad 74. Then, the swiveling mechanism 73 of the workpiece unloading means 7 is operated to position the suction pad 74 that sucks and holds the semiconductor wafer W directly above the cleaning mechanism 8. Next, the rotation driving means 83 of the cleaning mechanism 8 is operated to rotate the rotating shaft 82 and the air cylinder 861 constituting the positioning means 86 is operated to perform the operation of the second cleaning means 85 as shown in FIG. The upper surface of the flexible member 852 is positioned at a cleaning position higher than the upper surfaces of the grinding members 842 and 842 constituting the first cleaning means 84, and the flexible member 852 is placed on the surface (lower surface) of the semiconductor wafer W held by suction by the suction pad 74. It is made to contact the to-be-held surface which is the lower surface of the masking tape T stuck. At this time, the cleaning water supply means (not shown) of the cleaning mechanism 8 is operated to inject cleaning water from the outlets 871 and 871 of the cleaning water injection nozzles 87 and 87 toward the held surface which is the lower surface of the protective tape T. When the rotating shaft 82 rotates, the first cleaning means 84 and the second cleaning means 85 attached to the rotating shaft 82 rotate as described above, and the suction pad 74 is attached to the suction pad 74 by the flexible member 852 of the second cleaning means 85. Grinding debris adhering to the held surface, which is the lower surface of the protective tape T attached to the surface (lower surface) of the semiconductor wafer W held by suction, is cleaned and removed (protective tape cleaning step). In this protective tape cleaning process, the turning mechanism 73 of the workpiece unloading means 7 is operated to swing the operating arm 71 around the vertical portion 711, and the suction pad 74 attached to the operating arm 71 is moved within a predetermined range. It is desirable to rock at. As described above, in the protective tape cleaning step, the surface to be held, which is the lower surface of the protective tape T attached to the surface (lower surface) of the semiconductor wafer W, is cleaned by the flexible member 852 such as a sponge. Will not peel off.

上述した保護テープ洗浄工程を実施したならば、図示しない洗浄水供給手段の作動を停止するとともに回転駆動手段83の作動を停止し、位置付け手段86を構成するエアシリンダ861を作動して第2の洗浄手段85を上記退避位置に位置付ける。次に、被加工物搬出手段7の旋回機構73を作動して吸着パッド74に吸引保持されている半導体ウエーハWをスピンナー洗浄手段14に搬送する。スピンナー洗浄手段14に搬送された半導体ウエーハWは、ここで裏面(上面)である被研削面および側面に付着している研削屑が洗浄され除去されるとともに、スピン乾燥される。このようにして洗浄およびスピン乾燥された研削加工後の半導体ウエーハWは、被加工物搬送手段15によって第2のカセット12に搬送され収納される。   If the above-described protective tape cleaning process is performed, the operation of the cleaning water supply means (not shown) is stopped, the operation of the rotation driving means 83 is stopped, the air cylinder 861 constituting the positioning means 86 is operated, and the second operation is performed. The cleaning means 85 is positioned at the retracted position. Next, the turning mechanism 73 of the workpiece unloading means 7 is operated to transport the semiconductor wafer W sucked and held by the suction pad 74 to the spinner cleaning means 14. The semiconductor wafer W transported to the spinner cleaning means 14 is cleaned and removed while grinding scraps adhering to the surface to be ground and the side surface as the back surface (upper surface) are removed. The semiconductor wafer W after grinding that has been cleaned and spin-dried in this manner is transported and stored in the second cassette 12 by the workpiece transport means 15.

一方、被加工物搬出手段7は、保護テープ洗浄工程が実施された半導体ウエーハWをスピンナー洗浄手段14に搬送したならば、旋回機構73を作動して吸着パッド74を再度洗浄機構8の直上に位置付ける。次に、洗浄機構8の回転駆動手段83を作動して回転軸82を回転するとともに、被加工物搬出手段7の昇降機構72を作動し吸着パッド74の下面である吸着面を図6に示すように第1の洗浄手段84を構成する研削部材842、842の上面に接触せしめる。このとき、洗浄機構8の図示しない洗浄水供給手段を作動して洗浄水噴射ノズル87、87の噴出口871、871から吸着パッド74の下面である吸着面に向けて洗浄水を噴射せしめる。なお、第2の洗浄手段85は、上記保護テープ洗浄工程が実施された後に上記退避位置に位置付けられている。回転軸82が回転すると、上述したように回転軸82に取り付けられた第1の洗浄手段84および第2の洗浄手段85が回転し、第1の洗浄手段84の研削部材842、842によって吸着パッド74の下面である吸着面に付着している研削屑が洗浄され除去される(吸着パッド洗浄工程)。この吸着パッド洗浄工程においては、被加工物搬出手段7の旋回機構73を作動して作動アーム71を垂直部711を中心として揺動し、作動アーム71に取り付けられた吸着パッド74を所定の範囲で揺動することが望ましい。以上のように吸着パッド洗浄工程においては、第1の洗浄手段85を構成する研削部材842、842の回転によって吸着パッド74の下面である吸着面が洗浄されるので、吸着パッド74の下面である吸着面は偏磨耗することはない。   On the other hand, when the workpiece carrying-out means 7 transports the semiconductor wafer W on which the protective tape cleaning process has been performed to the spinner cleaning means 14, the swivel mechanism 73 is operated to again place the suction pad 74 directly above the cleaning mechanism 8. Position. Next, the rotation driving means 83 of the cleaning mechanism 8 is operated to rotate the rotary shaft 82, and the lifting mechanism 72 of the workpiece unloading means 7 is operated to show the suction surface, which is the lower surface of the suction pad 74, as shown in FIG. Thus, the upper surfaces of the grinding members 842 and 842 constituting the first cleaning means 84 are brought into contact with each other. At this time, the cleaning water supply means (not shown) of the cleaning mechanism 8 is operated to spray the cleaning water from the ejection ports 871 and 871 of the cleaning water spray nozzles 87 and 87 toward the suction surface which is the lower surface of the suction pad 74. The second cleaning means 85 is positioned at the retracted position after the protective tape cleaning process is performed. When the rotating shaft 82 rotates, the first cleaning means 84 and the second cleaning means 85 attached to the rotating shaft 82 rotate as described above, and the suction pads are driven by the grinding members 842 and 842 of the first cleaning means 84. Grinding dust adhering to the suction surface, which is the lower surface of 74, is cleaned and removed (suction pad cleaning process). In this suction pad cleaning step, the turning mechanism 73 of the workpiece unloading means 7 is operated to swing the operating arm 71 around the vertical portion 711, and the suction pad 74 attached to the operating arm 71 is moved within a predetermined range. It is desirable to rock at. As described above, in the suction pad cleaning step, the suction surface, which is the lower surface of the suction pad 74, is cleaned by the rotation of the grinding members 842, 842 constituting the first cleaning means 85, so that it is the lower surface of the suction pad 74. The adsorption surface does not wear unevenly.

以上のように、図示の実施形態における洗浄機構8は、被加工物搬出手段7の吸着パッド74の吸着面を洗浄するための研削部材842、842を備えた第1の洗浄手段84と、吸着パッド74に吸引保持された半導体ウエーハWの表面(下面)に貼着されている保護テープTの下面である被保持面を洗浄するための柔軟部材852を備えた第2の洗浄手段85を回転軸82に取り付け、該回転軸82を回転することにより第1の洗浄手段84および第2の洗浄手段85を回転するように構成したので、洗浄機構全体をコンパクトに構成することができるため、設置場所の制約を受けにくい。   As described above, the cleaning mechanism 8 in the illustrated embodiment includes the first cleaning unit 84 including the grinding members 842 and 842 for cleaning the suction surface of the suction pad 74 of the workpiece unloading unit 7, and the suction Rotating the second cleaning means 85 having a flexible member 852 for cleaning the held surface, which is the lower surface of the protective tape T attached to the surface (lower surface) of the semiconductor wafer W sucked and held by the pad 74 Since the first cleaning means 84 and the second cleaning means 85 are configured to rotate by being attached to the shaft 82 and rotating the rotary shaft 82, the entire cleaning mechanism can be configured compactly. It is hard to be restricted by place.

以上、本発明を図示の実施形態に基づいて説明したが、本発明は実施形態のみに限定されるものではなく、本発明の趣旨の範囲で種々の変形は可能である。例えば、図示の実施形態においては洗浄機構8の位置付け手段86が第2の洗浄手段85を洗浄位置と退避位置に位置付けるように構成したが、第1の洗浄手段84を洗浄位置と退避位置に位置付けるように構成してもよい。   Although the present invention has been described based on the illustrated embodiment, the present invention is not limited to the embodiment, and various modifications are possible within the scope of the gist of the present invention. For example, in the illustrated embodiment, the positioning unit 86 of the cleaning mechanism 8 is configured to position the second cleaning unit 85 at the cleaning position and the retracted position. However, the first cleaning unit 84 is positioned at the cleaning position and the retracted position. You may comprise as follows.

本発明によって構成された研削装置の斜視図。The perspective view of the grinding device comprised by this invention. 図1に示す研削装置に装備される被加工物搬出手段の要部を破断して示す説明図。Explanatory drawing which fractures | ruptures and shows the principal part of the workpiece conveyance means with which the grinding apparatus shown in FIG. 1 is equipped. 図1に示す研削装置に装備される洗浄機構の構成部材を分解して示す斜視図。The perspective view which decomposes | disassembles and shows the structural member of the washing | cleaning mechanism with which the grinding apparatus shown in FIG. 1 is equipped. 図1に示す研削装置に装備される洗浄機構の斜視図。The perspective view of the washing | cleaning mechanism with which the grinding apparatus shown in FIG. 1 is equipped. 図1に示す研削装置によって実施される保護テープ洗浄工程の説明図。Explanatory drawing of the masking tape washing process implemented by the grinding apparatus shown in FIG. 図1に示す研削装置によって実施される吸着パッド洗浄工程の説明図。Explanatory drawing of the suction pad washing | cleaning process implemented by the grinding apparatus shown in FIG.

符号の説明Explanation of symbols

2:装置ハウジング
3:荒研削ユニット
33:研削ホイール
4:仕上げ研削ユニット
43:研削ホイール
5:ターンテーブル
6:チャックテーブル
7:被加工物搬出手段
71:作動アーム
72:昇降機構
73:旋回機構
74:吸着パッド
8:洗浄機構
81:円筒状の支持部材
82:回転軸
83:回転駆動手段
84:第1の洗浄手段
842:研削部材
85:第2の洗浄手段
852:研削部材
86:位置付け手段
87:洗浄水噴射ノズル
11:第1のカセット
12:第2のカセット
13:中心合わせ手段
14:スピンナー洗浄手段
15:被加工物搬送手段
16:被加工物搬入手段
W:半導体ウエーハ
T:保護テープ
2: Device housing 3: Rough grinding unit 33: Grinding wheel 4: Finish grinding unit 43: Grinding wheel 5: Turntable 6: Chuck table 7: Workpiece carrying means 71: Actuating arm 72: Lifting mechanism 73: Swivel mechanism 74 : Suction pad 8: cleaning mechanism 81: cylindrical support member 82: rotating shaft 83: rotation driving means 84: first cleaning means 842: grinding member 85: second cleaning means 852: grinding member 86: positioning means 87 : Cleaning water jet nozzle 11: First cassette 12: Second cassette 13: Centering means 14: Spinner cleaning means 15: Workpiece conveying means 16: Workpiece carrying means
W: Semiconductor wafer T: Protective tape

Claims (1)

被加工物を保持するチャックテーブルと、該チャックテーブル上に保持された被加工物を研削する研削手段と、該チャックテーブル上で研削された被加工物を吸引保持する吸着面を有する吸着パッドを備えた被加工物搬出手段と、該吸着パッドの搬出経路に配設され該吸着パッドに吸引保持された被加工物の該チャックテーブルに保持されたときの被保持面および該吸着パッドの吸着面を洗浄する洗浄機構と、を具備する研削装置において、
該洗浄機構は、該吸着パッドの吸着面に垂直な方向に配設された回転軸と、該回転軸を回転駆動する回転駆動手段と、該回転軸の上端部に径方向に突出して配設され該吸着パッドの吸着面を洗浄するための研削部材を備えた第1の洗浄手段と、該回転軸の上端部に径方向に突出して配設され該吸着パッドに吸引保持された被加工物の被保持面を洗浄するための柔軟部材を備えた第2の洗浄手段と、該第1の洗浄手段と該第2の洗浄手段のいずれか一方を軸方向に進退し他方の洗浄手段の上面より高い洗浄位置と他方の洗浄手段の上面より低い退避位置に位置付ける位置付け手段と、該回転軸の上端部に径方向に突出して配設され洗浄水を噴射する洗浄水噴射ノズルと、を具備している、
ことを特徴とする研削装置。
A chuck table for holding a workpiece, a grinding means for grinding the workpiece held on the chuck table, and a suction pad having a suction surface for sucking and holding the workpiece ground on the chuck table Workpiece unloading means provided, a surface to be held when the work piece is held on the chuck table and is held in the suction path of the suction pad, and a suction surface of the suction pad In a grinding device comprising a cleaning mechanism for cleaning
The cleaning mechanism includes a rotation shaft disposed in a direction perpendicular to the suction surface of the suction pad, a rotation driving unit that rotationally drives the rotation shaft, and a radial protrusion at the upper end of the rotation shaft. A first cleaning means provided with a grinding member for cleaning the suction surface of the suction pad, and a work piece that is disposed to project radially from the upper end of the rotating shaft and is sucked and held by the suction pad of the second cleaning means having a flexible member for cleaning the holding surface, one of the cleaning means and the second cleaning means of the first forward and backward in the axial direction of the other cleaning means A positioning means positioned at a cleaning position higher than the upper surface and a retreat position lower than the upper surface of the other cleaning means, and a cleaning water spray nozzle that is arranged to project radially from the upper end of the rotating shaft and jets cleaning water. doing,
A grinding apparatus characterized by that.
JP2008268775A 2008-10-17 2008-10-17 Grinding equipment Active JP5320014B2 (en)

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JP5908703B2 (en) * 2011-11-11 2016-04-26 株式会社ディスコ Grinding apparatus and method for cleaning circular plate workpiece
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JP6366431B2 (en) * 2014-09-02 2018-08-01 株式会社ディスコ Grinding equipment
JP2017073457A (en) * 2015-10-07 2017-04-13 株式会社ディスコ Washing apparatus
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JP7320358B2 (en) * 2019-03-05 2023-08-03 株式会社ディスコ Processing equipment and cleaning method
JP7536400B2 (en) 2020-08-25 2024-08-20 株式会社ディスコ Method for cleaning workpieces
JP2022150097A (en) * 2021-03-26 2022-10-07 株式会社東京精密 Wafer rear face washing device
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