EP4321298A1 - Device and method for pressing an upper polishing cloth against an upper polishing plate of a machine for simultaneously polishing a front side and a back side of a semiconductor wafer - Google Patents
Device and method for pressing an upper polishing cloth against an upper polishing plate of a machine for simultaneously polishing a front side and a back side of a semiconductor wafer Download PDFInfo
- Publication number
- EP4321298A1 EP4321298A1 EP22190170.5A EP22190170A EP4321298A1 EP 4321298 A1 EP4321298 A1 EP 4321298A1 EP 22190170 A EP22190170 A EP 22190170A EP 4321298 A1 EP4321298 A1 EP 4321298A1
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- EP
- European Patent Office
- Prior art keywords
- upper polishing
- polishing
- plate
- machine
- polishing plate
- Prior art date
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- 238000005498 polishing Methods 0.000 title claims abstract description 149
- 239000004744 fabric Substances 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000004065 semiconductor Substances 0.000 title claims abstract description 10
- 238000004026 adhesive bonding Methods 0.000 claims description 2
- 235000012431 wafers Nutrition 0.000 description 6
- 241001295925 Gegenes Species 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 208000012886 Vertigo Diseases 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910021419 crystalline silicon Inorganic materials 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B37/00—Lapping machines or devices; Accessories
- B24B37/04—Lapping machines or devices; Accessories designed for working plane surfaces
- B24B37/07—Lapping machines or devices; Accessories designed for working plane surfaces characterised by the movement of the work or lapping tool
- B24B37/08—Lapping machines or devices; Accessories designed for working plane surfaces characterised by the movement of the work or lapping tool for double side lapping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B37/00—Lapping machines or devices; Accessories
- B24B37/34—Accessories
Definitions
- the subject of the invention is a device for pressing an upper polishing cloth against an upper polishing plate of a machine for simultaneously polishing a front and a back of a semiconductor wafer.
- the invention also relates to a corresponding method which uses the device.
- Polishing workpieces such as semiconductor wafers on both sides is also called double-side polishing (DSP).
- DSP double-side polishing
- Basics of the DSP of semiconductor wafers are, for example, in US 2003 0 054 650 A1 and in DE 100 07 390 A1 described.
- both polishing plates of a DSP system are covered with polishing cloths. These should be glued on without bubbles in order to exclude a source that would affect the desired polishing result.
- the respective polishing cloth should adhere evenly to the polishing plate.
- the polishing cloths can be pressed together between the polishing plates (cloth pressing). Pressing causes the glue to flow and adhere better.
- the upper polishing cloth which is ring-shaped, is glued to the upper polishing plate.
- Such a procedure is, for example, in EP 4 000 806 A1 describe. Bubbles in the space between the upper polishing plate and the upper polishing cloth must then be removed because this cannot be achieved adequately with cloth presses alone. Such bubbles can be pressed manually using a squeegee or a roller to the outer edge or inner edge of the upper polishing cloth and pressed out of the gap there.
- the object of the present invention is to offer a more efficient solution to remove bubbles from the space between the upper polishing plate and the upper polishing cloth.
- the linear rails are preferably attached to a ring or a plate as a base body.
- the ring or plate lies on the lower one Polishing cloth and has teeth that engage in the outer and inner pin rings of the machine.
- the linear rails can protrude over the edge of the lower polishing plate. But it is also possible to shorten it to a length that corresponds to the distance between the inner pin ring and the outer pin ring.
- the actuators preferably work pneumatically or electrically.
- the upper polishing cloth is glued to the upper polishing plate and thereby brought into an intermediate state in which bubbles are present in the space between the upper polishing cloth and the upper polishing plate and the upper polishing cloth does not yet adhere evenly to the upper polishing plate.
- This can be done, for example, by placing the upper polishing cloth on the lower polishing cloth, with the adhesive layer of the upper polishing cloth facing upwards, i.e. facing away from the lower polishing plate, and the polishing plates being pressed against each other. You can also proceed as described in EP 4 000 806 A1 is described.
- the device according to the invention is used to remove the bubbles from the space between the upper polishing plate and the upper polishing cloth in the next step.
- the device is placed above the lower one Polishing cloth arranged and the upper polishing plate pivoted over the lower polishing plate so that there is a small distance between the two polishing plates. At this distance, the roller does not yet touch the upper polishing cloth unless the actuators have raised it yet. However, the distance is also sufficiently small so that the roller can be pressed against the upper polishing cloth using the actuators.
- the upper polishing plate is rotated, preferably at a speed of not less than 0.1 rpm and not more than 1 rpm, particularly preferably 0.2 rpm, and the roller is raised by means of the actuators so that it is pressed against the upper polishing cloth.
- the contact pressure of the roller is preferably 1.8 x 10 5 Pa - 2.0 x 10 5 Pa (1.8 bar - 2.0 bar) and can be varied.
- the roller with the carriages is moved along the linear rails between the inner and outer pin rings of the polishing machine.
- the roller drives bubbles primarily in the radial direction from the inner edge to the outer edge of the upper polishing cloth and thus out of the space between the upper polishing cloth and the upper polishing plate.
- the speed of the roller movement along the linear rails is preferably 0.5 m/s - 1.5 m/s and can also be varied.
- the roller is at least temporarily pressed against the upper polishing cloth while the upper polishing plate is rotated and the roller is moved between the inner and outer pin rings of the machine.
- the roller is moved back and forth between the inner and outer pin rings of the polishing machine and pressed against the upper polishing cloth while the upper polishing plate is rotated.
- the roller is moved back and forth between the inner and outer pin rings of the polishing machine and is only pressed against the upper polishing cloth on the return or return path while the upper polishing plate is rotated.
- Fig.1 shows features of a DSP polishing machine in a top view of the lower polishing plate 1, on which an annular lower polishing cloth 2 is glued.
- An inner pin ring 5 and an outer pin ring 6 are arranged parallel to the inner edge 3 and to the outer edge 4 of the lower polishing cloth 2 and the lower polishing plate 1, by means of which the polishing plates 1, 8 can be rotated.
- the lower polishing plate 1 is used to support the device for pressing the upper polishing cloth 7 against the upper polishing plate 8 thereon.
- the device comprises two parallel linear rails 9, which are arranged at a short distance above the lower polishing plate 1 parallel to an intermediate radius of the lower polishing plate 1.
- Each of the linear rails 9 serves as a guide for a slide 10, each of the slides 10 carrying an actuator 11 and a roller 12 is attached to the actuators, so that the roller is arranged between the linear rails 9.
- the actuators can raise and lower the roller 12 and the carriages 10 can move it along a path between the outer pin ring 6 and the inner pin ring 5.
- the carriages 10 and the actuators 11 each move synchronously, which is ensured by a control 13 (controller).
- the linear rails 9 rest on a ring 14 and strips 15 lying in the ring 14, the ring 14 having external teeth 16 which engage in the outer pin ring 6 and the inner pin ring 5 of the machine.
- the upper polishing cloth 7 is brought into an intermediate state in which bubbles are present in the space between the upper polishing cloth 7 and the upper polishing plate 8 and the upper polishing cloth 7 does not yet adhere evenly to the upper polishing plate 8.
- the device for pressing the upper polishing cloth 7 against the upper polishing plate 8 is then arranged above the lower polishing cloth 2, and the upper polishing plate 8 is pushed over the lower polishing plate 1.
- the two polishing plates 8,1 are at a distance from one another which allows the roller 12 of the device to be pressed against the upper polishing cloth 7.
- Fig. 2 it shows the situation before the upper polishing plate 8 was arranged over the lower polishing plate 1.
- the upper polishing plate 8 is then slowly rotated and the roller 12 is moved between the outer pin ring 6 and the inner pin ring 5 by means of the carriage 10. and moved here while the actuators 11 press the roller 12 against the upper polishing cloth 7 at least temporarily.
- the geometry i.e. the flatness and plane parallelism of polished semiconductor wafers made of single-crystalline silicon, was measured, including the local geometry at the edge, and combined into a measurement value that contains the measurement results of GBIR (global flatness back ideal range) and ESFQR (edge site front least squares range ) united. This measured value was on average almost 17.8% smaller if the upper polishing cloth was not pressed manually before polishing, but was pressed against the upper polishing plate according to the invention.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
Vorrichtung und Verfahren zum Anpressen eines oberen Poliertuchs gegen einen oberen Polierteller einer Maschine zum gleichzeitigen Polieren einer Vorderseite und einer Rückseite einer Halbleiterscheibe zwischen dem oberen Polierteller und einem unteren Polierteller: Die Vorrichtung umfasst
zwei parallel liegende Linearschienen, die in geringem Abstand über dem unteren Polierteller parallel zu einem dazwischenliegenden Radius des unteren Poliertellers angeordnet sind;
einen Grundkörper, auf dem die Linearschienen befestigt sind;
zwei entlang der Linearschienen bewegbare, angetriebene Schlitten;
von den Schlitten getragene Aktuatoren zum Anheben und Absenken einer Walze, die an den Aktuatoren befestigt und zwischen den Linearschienen angeordnet ist; und eine Steuerung zum synchronen Hin- und Herbewegen der Schlitten zwischen einem äußeren und einem inneren Stiftkranz der Maschine und zum synchronen Bewegen der Aktuatoren.
Device and method for pressing an upper polishing cloth against an upper polishing plate of a machine for simultaneously polishing a front and a back side of a semiconductor wafer between the upper polishing plate and a lower polishing plate: The device comprises
two parallel linear rails which are arranged at a short distance above the lower polishing plate parallel to an intermediate radius of the lower polishing plate;
a base body on which the linear rails are attached;
two driven carriages that can be moved along the linear rails;
actuators carried by the carriages for raising and lowering a roller attached to the actuators and arranged between the linear rails; and a controller for synchronously moving the carriages back and forth between an outer and an inner pin ring of the machine and for synchronously moving the actuators.
Description
Gegenstand der Erfindung ist eine Vorrichtung zum Anpressen eines oberen Poliertuchs gegen einen oberen Polierteller einer Maschine zum gleichzeitigen Polieren einer Vorderseite und einer Rückseite einer Halbleiterscheibe. Gegenstand der Erfindung ist auch ein entsprechendes Verfahren, welches die Vorrichtung verwendet.The subject of the invention is a device for pressing an upper polishing cloth against an upper polishing plate of a machine for simultaneously polishing a front and a back of a semiconductor wafer. The invention also relates to a corresponding method which uses the device.
Das beidseitige Polieren von Werkstücken wie Halbleiterscheiben wird auch Doppelseitenpolitur (DSP) genannt. Grundzüge der DSP von Halbleiterscheiben sind beispielsweise in
In der Regel werden beide Polierteller einer DSP-Anlage mit Poliertüchern beklebt. Diese sollten blasenfrei aufgeklebt sein, um eine Quelle auszuschließen, die das gewünschte Polierergebnis beeinträchtigt. Das jeweilige Poliertuch sollte auf dem Polierteller auch gleichmäßig stark haften. Um die notwendige Haftung zu erreichen, können die Poliertücher zwischen den Poliertellern zusammengepresst werden (Tuchpressen). Durch das Pressen verfließt der Kleber und haftet besser. Verfahren zum Schaffen einer klebenden Verbindung zwischen dem jeweiligen Poliertuch und dem entsprechenden Polierteller sind aus
Vor dem Tuchpressen wird das obere Poliertuch, das ringförmig ausgebildet ist, auf den oberen Polierteller geklebt. Ein solches Verfahren ist beispielsweise in
Diese Arbeit ist anstrengend und schwierig, weil währenddessen überkopf gearbeitet werden muss. In
Aufgabe der vorliegenden Erfindung ist es, eine effizientere Lösung anzubieten, um Blasen aus dem Zwischenraum zwischen dem oberem Polierteller und dem oberen Poliertuch zu entfernen.The object of the present invention is to offer a more efficient solution to remove bubbles from the space between the upper polishing plate and the upper polishing cloth.
Die Aufgabe der Erfindung wird gelöst durch eine Vorrichtung zum Anpressen eines oberen Poliertuchs gegen einen oberen Polierteller einer Maschine zum gleichzeitigen Polieren einer Vorderseite und einer Rückseite einer Halbleiterscheibe zwischen dem oberen Polierteller und einem unteren Polierteller, umfassend
- zwei parallel liegende Linearschienen, die in geringem Abstand über dem unteren Polierteller parallel zu einem dazwischenliegenden Radius des unteren Poliertellers angeordnet sind;
- einen Grundkörper, auf dem die Linearschienen befestigt sind;
- zwei entlang der Linearschienen bewegbare, angetriebene Schlitten;
- von den Schlitten getragene Aktuatoren zum Anheben und Absenken einer Walze, die an den Aktuatoren befestigt und zwischen den Linearschienen angeordnet ist; und eine Steuerung zum synchronen Hin- und Herbewegen der Schlitten zwischen einem inneren und einem äußeren Stiftkranz der Maschine und zum synchronen Bewegen der Aktuatoren.
- two parallel linear rails which are arranged at a short distance above the lower polishing plate parallel to an intermediate radius of the lower polishing plate;
- a base body on which the linear rails are attached;
- two driven carriages that can be moved along the linear rails;
- actuators carried by the carriages for raising and lowering a roller attached to the actuators and arranged between the linear rails; and a controller for synchronously moving the carriages back and forth between an inner and an outer pin ring of the machine and for synchronously moving the actuators.
Die Linearschienen sind vorzugsweise auf einem Ring oder einer Platte als Grundkörper befestigt. Der Ring beziehungsweise die Platte liegt auf dem unteren Poliertuch und weist eine Verzahnung auf, die in den äußeren und in den inneren Stiftkranz der Maschine eingreift. Die Linearschienen können über den Rand des unteren Poliertellers ragen. Es ist aber auch möglich, sie bis auf eine Länge zu verkürzen, die dem Abstand zwischen dem inneren Stiftkranz und dem äußeren Stiftkranz entspricht.The linear rails are preferably attached to a ring or a plate as a base body. The ring or plate lies on the lower one Polishing cloth and has teeth that engage in the outer and inner pin rings of the machine. The linear rails can protrude over the edge of the lower polishing plate. But it is also possible to shorten it to a length that corresponds to the distance between the inner pin ring and the outer pin ring.
Die Aktuatoren arbeiten vorzugsweise pneumatisch oder elektrisch.The actuators preferably work pneumatically or electrically.
Des Weiteren wird die Aufgabe gelöst durch ein Verfahren zum Anpressen eines oberen Poliertuchs gegen einen oberen Polierteller einer Maschine zum gleichzeitigen Polieren einer Vorderseite und einer Rückseite einer Halbleiterscheibe, umfassend
- das Bekleben des oberen Poliertellers mit dem oberen Poliertuch; und
- das Anordnen der Vorrichtung nach einem der
Ansprüche 1 bis 3 über dem unteren Poliertuch; - das Anordnen des oberen Poliertellers über dem unteren Polierteller in einem Abstand zueinander, der es erlaubt, die Walze der Vorrichtung gegen das obere Poliertuch zu pressen; und
- das zumindest zeitweise Pressen der Walze gegen das obere Poliertuch bei gleichzeitigem Drehen des oberen Poliertellers und Hin- und Herbewegen der Walze zwischen dem inneren und dem äußeren Stiftkranz der Maschine.
- gluing the upper polishing plate with the upper polishing cloth; and
- placing the device according to any one of
claims 1 to 3 over the lower polishing cloth; - arranging the upper polishing pad over the lower polishing pad at a distance from each other that allows the roller of the device to be pressed against the upper polishing cloth; and
- the at least temporary pressing of the roller against the upper polishing cloth while simultaneously rotating the upper polishing plate and moving the roller back and forth between the inner and outer pin rings of the machine.
Das obere Poliertuch wird auf den oberen Polierteller geklebt und dabei in einen Zwischenzustand gebracht, in dem Blasen im Zwischenraum zwischen dem oberen Poliertuch und dem oberen Polierteller vorhanden sind und das obere Poliertuch noch nicht gleichmäßig am oberen Polierteller haftet. Das kann beispielsweise geschehen, indem das obere Poliertuch auf dem unteren Poliertuch abgelegt wird, wobei die klebende Schicht des oberen Poliertuchs nach oben weisend, also vom unteren Polierteller abgewendet liegt, und die Polierteller gegeneinandergepresst werden. Es kann auch so vorgegangen werden, wie es in
Die erfindungsgemäße Vorrichtung wird verwendet, um im nächsten Schritt die Blasen aus dem Zwischenraum zwischen dem oberen Polierteller und dem oberen Poliertuch zu entfernen. Zu diesem Zweck wird die Vorrichtung über dem unteren Poliertuch angeordnet und der obere Polierteller über den unteren Polierteller geschwenkt, so dass ein geringer Abstand zwischen beiden Poliertellern besteht. Bei diesem Abstand berührt die Walze noch nicht das obere Poliertuch, sofern die Aktuatoren sie noch nicht angehoben haben. Der Abstand ist aber auch ausreichend klein, damit die Walze mittels der Aktuatoren gegen das obere Poliertuch gepresst werden kann. Danach wird der obere Polierteller gedreht, vorzugsweise mit einer Geschwindigkeit von nicht weniger als 0,1 U/min und nicht mehr als 1 U/min, besonders bevorzugt 0,2 U/min, und die Walze mittels der Aktuatoren angehoben, so dass sie gegen das obere Poliertuch gedrückt wird. Der Anpressdruck der Walze beträgt vorzugsweise 1,8 x 105 Pa - 2,0 x 105 Pa (1,8 bar - 2,0 bar) und kann variiert werden.The device according to the invention is used to remove the bubbles from the space between the upper polishing plate and the upper polishing cloth in the next step. For this purpose, the device is placed above the lower one Polishing cloth arranged and the upper polishing plate pivoted over the lower polishing plate so that there is a small distance between the two polishing plates. At this distance, the roller does not yet touch the upper polishing cloth unless the actuators have raised it yet. However, the distance is also sufficiently small so that the roller can be pressed against the upper polishing cloth using the actuators. Thereafter, the upper polishing plate is rotated, preferably at a speed of not less than 0.1 rpm and not more than 1 rpm, particularly preferably 0.2 rpm, and the roller is raised by means of the actuators so that it is pressed against the upper polishing cloth. The contact pressure of the roller is preferably 1.8 x 10 5 Pa - 2.0 x 10 5 Pa (1.8 bar - 2.0 bar) and can be varied.
Gleichzeitig mit dem Pressen der Walze gegen das obere Poliertuch wird die Walze mit den Schlitten entlang der Linearschienen zwischen dem inneren und dem äußeren Stiftkranz der Poliermaschine bewegt. Dabei treibt die Walze, Blasen vornehmlich in radialer Richtung vom Innenrand zum Außenrand des oberen Poliertuchs und damit aus dem Zwischenraum zwischen dem oberen Poliertuch und dem oberen Polierteller. Die Geschwindigkeit der Walzenbewegung entlang der Linearschienen beträgt vorzugsweise 0,5 m/s - 1,5m/s und kann ebenfalls variiert werden.At the same time as the roller is pressed against the upper polishing cloth, the roller with the carriages is moved along the linear rails between the inner and outer pin rings of the polishing machine. The roller drives bubbles primarily in the radial direction from the inner edge to the outer edge of the upper polishing cloth and thus out of the space between the upper polishing cloth and the upper polishing plate. The speed of the roller movement along the linear rails is preferably 0.5 m/s - 1.5 m/s and can also be varied.
Die Walze wird zumindest zeitweise gegen das obere Poliertuch gepresst, während der obere Polierteller gedreht und die Walze zwischen dem inneren und dem äußerem Stiftkranz der Maschine bewegt wird.The roller is at least temporarily pressed against the upper polishing cloth while the upper polishing plate is rotated and the roller is moved between the inner and outer pin rings of the machine.
Gemäß einer Ausführungsform wird die Walze zwischen dem inneren und dem äußeren Stiftkranz der Poliermaschine hin- und herbewegt und gegen das obere Poliertuch gepresst, während der obere Polierteller gedreht wird.According to one embodiment, the roller is moved back and forth between the inner and outer pin rings of the polishing machine and pressed against the upper polishing cloth while the upper polishing plate is rotated.
Gemäß einer anderen Ausführungsform wird die Walze zwischen dem inneren und dem äußeren Stiftkranz der Poliermaschine hin- und herbewegt und nur auf dem Hin- oder Rückweg gegen das obere Poliertuch gepresst, während der obere Polierteller gedreht wird.According to another embodiment, the roller is moved back and forth between the inner and outer pin rings of the polishing machine and is only pressed against the upper polishing cloth on the return or return path while the upper polishing plate is rotated.
Die weitere Beschreibung der Erfindung erfolgt unter Bezugnahme auf Zeichnungen.The further description of the invention takes place with reference to drawings.
-
Fig. 1 zeigt Merkmale einer DSP-Poliermaschine bei Draufsicht auf den unteren Polierteller.Fig. 1 shows features of a DSP polishing machine with a top view of the lower polishing plate. -
Fig. 2 zeigt eine bevorzugte Ausführungsform der Erfindung.Fig. 2 shows a preferred embodiment of the invention.
- 11
- unterer Poliertellerlower polishing plate
- 22
- unteres Poliertuchlower polishing cloth
- 33
- InnenrandInner edge
- 44
- AußenrandOuter edge
- 55
- innerer Stiftkranzinner pin wreath
- 66
- äußerer Stiftkranzouter pin wreath
- 77
- oberes Poliertuchtop polishing cloth
- 88th
- oberer Poliertellerupper polishing plate
- 99
- LinearschienenLinear rails
- 1010
- SchlittenSleds
- 1111
- Aktuatoractuator
- 1212
- Walzeroller
- 1313
- Steuerungsteering
- 1414
- Ringring
- 1515
- LeistenAfford
- 1616
- AußenverzahnungExternal gearing
Wie in
Gemäß der dargestellten Ausführungsform liegen die Linearschienen 9 auf einem Ring 14 und im Ring 14 liegende Leisten 15 auf, wobei der Ring 14 eine Außenverzahnung 16 aufweist, die in den äußeren Stiftkranz 6 und in den inneren Stiftkranz 5 der Maschine eingreift.According to the embodiment shown, the
Zum Durchführen des erfindungsgemäßen Verfahrens wird das obere Poliertuch 7 in einem Zwischenzustand gebracht, in dem Blasen im Zwischenraum zwischen dem oberen Poliertuch 7 und dem oberen Polierteller 8 vorhanden sind und das obere Poliertuch 7 noch nicht gleichmäßig am oberen Polierteller 8 haftet.To carry out the method according to the invention, the upper polishing cloth 7 is brought into an intermediate state in which bubbles are present in the space between the upper polishing cloth 7 and the upper polishing plate 8 and the upper polishing cloth 7 does not yet adhere evenly to the upper polishing plate 8.
Danach wird die Vorrichtung zum Anpressen des oberen Poliertuchs 7 gegen den oberen Polierteller 8 über dem unteren Poliertuch 2 angeordnet, und der obere Polierteller 8 über den unteren Polierteller 1 geschoben. Die beiden Polierteller 8,1 haben einen Abstand zueinander, der es erlaubt, die Walze 12 der Vorrichtung gegen das obere Poliertuch 7 zu pressen.The device for pressing the upper polishing cloth 7 against the upper polishing plate 8 is then arranged above the
Anschließend wird der obere Polierteller 8 langsam gedreht und die Walze 12 mittels der Schlitten 10 zwischen dem äußeren Stiftkranz 6 und dem inneren Stiftkranz 5 hin- und herbewegt, während die Aktuatoren 11 die Walze 12 zumindest zeitweise gegen das obere Poliertuch 7 pressen.The upper polishing plate 8 is then slowly rotated and the
Es konnte nachgewiesen werden, dass der Vorteil des Verfahrens nicht nur darin besteht, anstrengende manuelle Arbeit zu vermeiden, sondern sich auch vorteilhaft auf das Polierergebnis auswirkt. Die Geometrie, also die Ebenheit und Planparallelität polierter Halbleiterscheiben aus einkristallinem Silizium wurde gemessen, auch die lokale Geometrie am Rand, und zu einem Messwert zusammengefasst, der die Messergebnisse von GBIR (global flatness back ideal range) und ESFQR (edge site front least squares range) vereint. Dieser Messwert war um durchschnittlich nahezu 17,8 % kleiner, wenn das obere Poliertuch vor der Politur nicht manuell, sondern erfindungsgemäß gegen den oberen Polierteller gepresst worden war.It has been proven that the advantage of the process is not only that it avoids strenuous manual work, but also has a beneficial effect on the polishing result. The geometry, i.e. the flatness and plane parallelism of polished semiconductor wafers made of single-crystalline silicon, was measured, including the local geometry at the edge, and combined into a measurement value that contains the measurement results of GBIR (global flatness back ideal range) and ESFQR (edge site front least squares range ) united. This measured value was on average almost 17.8% smaller if the upper polishing cloth was not pressed manually before polishing, but was pressed against the upper polishing plate according to the invention.
Claims (6)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP22190170.5A EP4321298A1 (en) | 2022-08-12 | 2022-08-12 | Device and method for pressing an upper polishing cloth against an upper polishing plate of a machine for simultaneously polishing a front side and a back side of a semiconductor wafer |
PCT/EP2023/071505 WO2024033205A1 (en) | 2022-08-12 | 2023-08-03 | Device and method for pressing an upper polishing cloth against an upper polishing plate of a machine for simultaneously polishing a front side and a rear side of a semiconductor wafer |
TW112130140A TW202406677A (en) | 2022-08-12 | 2023-08-10 | Device and method for pressing an upper polishing cloth against an upper polishing plate of a machine for simultaneously polishing a front side and a rear side of a semiconductor wafer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP22190170.5A EP4321298A1 (en) | 2022-08-12 | 2022-08-12 | Device and method for pressing an upper polishing cloth against an upper polishing plate of a machine for simultaneously polishing a front side and a back side of a semiconductor wafer |
Publications (1)
Publication Number | Publication Date |
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EP4321298A1 true EP4321298A1 (en) | 2024-02-14 |
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Application Number | Title | Priority Date | Filing Date |
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EP22190170.5A Pending EP4321298A1 (en) | 2022-08-12 | 2022-08-12 | Device and method for pressing an upper polishing cloth against an upper polishing plate of a machine for simultaneously polishing a front side and a back side of a semiconductor wafer |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP4321298A1 (en) |
TW (1) | TW202406677A (en) |
WO (1) | WO2024033205A1 (en) |
Citations (11)
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JPS5953151A (en) * | 1982-09-16 | 1984-03-27 | Toshiba Corp | Method and apparatus for attaching abrasive cloth to grinding machine |
DE10007390A1 (en) | 1999-03-13 | 2000-10-12 | Wolters Peter Werkzeugmasch | Dual disc polishing apparatus for semiconductor wafer, has support base which is connected with drive shaft and support disc, so that inclination of upper and lower grinding discs are equal |
US20010041650A1 (en) * | 1999-09-07 | 2001-11-15 | Nikon Corporation | Polishing device and polishing pad component exchange device and method |
US20030054650A1 (en) | 2001-07-05 | 2003-03-20 | Wacker Siltronic Gesellschaft Fur Halbleitermaterialien Ag | Process for material-removing machining of both sides of semiconductor wafers |
DE10239774A1 (en) | 2002-08-29 | 2003-11-27 | Wacker Siltronic Halbleitermat | Method and apparatus for attaching polishing cloths to the plates of a polishing machine such as for polishing silicon wafers using grooves or ridges to control application of a vacuum |
US20050277368A1 (en) * | 2004-06-14 | 2005-12-15 | Ebara Technologies Incorporated | Apparatus and method for removing a cmp polishing pad from a platen |
JP2006289523A (en) | 2005-04-06 | 2006-10-26 | Speedfam Co Ltd | Double sided polishing device equipped with pressure roller for applying polishing pad, and applying method of polishing pad |
JP2006346808A (en) | 2005-06-15 | 2006-12-28 | Mimasu Semiconductor Industry Co Ltd | Grinding pad sticking method and workpiece producing method |
US20070087671A1 (en) | 2005-10-17 | 2007-04-19 | Fujikoshi Machinery Corp. | Method of adhering polishing pads and jig for adhering the same |
DE102019213657A1 (en) * | 2019-09-09 | 2021-03-11 | Siltronic Ag | Method and device for pressing a polishing cloth |
EP4000806A1 (en) | 2020-11-16 | 2022-05-25 | Siltronic AG | Method for polishing semiconductor wafers on both sides between a lower polishing plate and an upper polishing plate |
-
2022
- 2022-08-12 EP EP22190170.5A patent/EP4321298A1/en active Pending
-
2023
- 2023-08-03 WO PCT/EP2023/071505 patent/WO2024033205A1/en unknown
- 2023-08-10 TW TW112130140A patent/TW202406677A/en unknown
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JPS5953151A (en) * | 1982-09-16 | 1984-03-27 | Toshiba Corp | Method and apparatus for attaching abrasive cloth to grinding machine |
DE10007390A1 (en) | 1999-03-13 | 2000-10-12 | Wolters Peter Werkzeugmasch | Dual disc polishing apparatus for semiconductor wafer, has support base which is connected with drive shaft and support disc, so that inclination of upper and lower grinding discs are equal |
US20010041650A1 (en) * | 1999-09-07 | 2001-11-15 | Nikon Corporation | Polishing device and polishing pad component exchange device and method |
US20030054650A1 (en) | 2001-07-05 | 2003-03-20 | Wacker Siltronic Gesellschaft Fur Halbleitermaterialien Ag | Process for material-removing machining of both sides of semiconductor wafers |
DE10239774A1 (en) | 2002-08-29 | 2003-11-27 | Wacker Siltronic Halbleitermat | Method and apparatus for attaching polishing cloths to the plates of a polishing machine such as for polishing silicon wafers using grooves or ridges to control application of a vacuum |
US20050277368A1 (en) * | 2004-06-14 | 2005-12-15 | Ebara Technologies Incorporated | Apparatus and method for removing a cmp polishing pad from a platen |
JP2006289523A (en) | 2005-04-06 | 2006-10-26 | Speedfam Co Ltd | Double sided polishing device equipped with pressure roller for applying polishing pad, and applying method of polishing pad |
JP2006346808A (en) | 2005-06-15 | 2006-12-28 | Mimasu Semiconductor Industry Co Ltd | Grinding pad sticking method and workpiece producing method |
US20070087671A1 (en) | 2005-10-17 | 2007-04-19 | Fujikoshi Machinery Corp. | Method of adhering polishing pads and jig for adhering the same |
DE102019213657A1 (en) * | 2019-09-09 | 2021-03-11 | Siltronic Ag | Method and device for pressing a polishing cloth |
EP4000806A1 (en) | 2020-11-16 | 2022-05-25 | Siltronic AG | Method for polishing semiconductor wafers on both sides between a lower polishing plate and an upper polishing plate |
Also Published As
Publication number | Publication date |
---|---|
TW202406677A (en) | 2024-02-16 |
WO2024033205A1 (en) | 2024-02-15 |
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