DE102006017423A1 - Semiconductor wafer`s edge determining device, has illumination device arranged such that reflection point is produced with light beam at hitting point at wafer, and position-sensitive sensor arranged so that point is represented on sensor - Google Patents
Semiconductor wafer`s edge determining device, has illumination device arranged such that reflection point is produced with light beam at hitting point at wafer, and position-sensitive sensor arranged so that point is represented on sensor Download PDFInfo
- Publication number
- DE102006017423A1 DE102006017423A1 DE200610017423 DE102006017423A DE102006017423A1 DE 102006017423 A1 DE102006017423 A1 DE 102006017423A1 DE 200610017423 DE200610017423 DE 200610017423 DE 102006017423 A DE102006017423 A DE 102006017423A DE 102006017423 A1 DE102006017423 A1 DE 102006017423A1
- Authority
- DE
- Germany
- Prior art keywords
- wafer
- edge
- sensor
- point
- reflection point
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67242—Apparatus for monitoring, sorting or marking
- H01L21/67259—Position monitoring, e.g. misposition detection or presence detection
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/028—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness by measuring lateral position of a boundary of the object
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/68—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for positioning, orientation or alignment
- H01L21/681—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for positioning, orientation or alignment using optical controlling means
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Container, Conveyance, Adherence, Positioning, Of Wafer (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
Description
Die Erfindung betrifft ein Vorrichtung zum Erkennen der Lage einer Kante eines Wafers nach dem Oberbegriff von Anspruch 1 sowie ein Verfahren zum Erkennen der Lage einer Kante eines Wafers nach dem Oberbegriff von Anspruch 5.The The invention relates to a device for detecting the position of an edge a wafer according to the preamble of claim 1 and a method for detecting the position of an edge of a wafer according to the preamble of claim 5.
In der Halbleiterfertigung werden Wafer während des Fertigungsprozesses in einer Vielzahl von Prozessschritten sequentiell bearbeitet, wobei auf einem Wafer eine Vielzahl gleicher wiederkehrenden Strukturelemente, die so genannten Dies, hergestellt wird. Mit zunehmender Integrationsdichte steigen die Anforderungen an die Qualität der auf den Wafern ausgebildeten Strukturen. Um die Qualität dieser Strukturen überprüfen und eine exakte Positionierung der Strukturen auf dem Wafer während seiner Herstellung gewährleisten sowie eventuelle Defekte finden zu können, ist das Erfordernis an die Genauigkeit und die Reproduzierbarkeit der den Wafer handhabenden Bauteile und Prozessschritte entsprechend hoch.In Semiconductor manufacturing becomes wafers during the manufacturing process processed sequentially in a plurality of process steps, wherein on a wafer a multiplicity of identical recurring structural elements, the so-called Dies, is produced. With increasing integration density the quality requirements of the wafers are increasing Structures. To the quality check these structures and an exact positioning of the structures on the wafer during its manufacture guarantee and to be able to find any defects is the requirement the accuracy and reproducibility of the wafer handling Components and process steps are correspondingly high.
Daher
wird auf das exakte Erkennen der Lage des Wafers auf der Bearbeitungsstation,
insbesondere auf einem Drehtisch besonderes Augenmerk gerichtet.
Ein Verfahren zum Erkennen der Position eines Wafers ist beispielsweise
aus der
Zur
Ausrichtung eines Wafers auf einem Drehtisch, dem so genannten Prealignement,
sind aus der
Der Wafer wird dann mit Hilfe von Einstellelementen in die gewünschte Position gebracht.Of the Wafer is then using adjustment elements in the desired position brought.
Zur Ermittlung der Lage der Kante eines Wafers auf einem Drehtisch sind aus der US 2004/0056216 A1 weiterhin ein Verfahren und eine Vorrichtung bekannt. Dabei wird der auf einem Drehtisch liegende Wafer senkrecht von unten radial nach außen über seine Kante hinweg beleuchtet. Ein über dem Wafer angebrachter CCD-Sensor kann bei transparenten Wafern die Lage der Änderung der Absorption oder bei nicht transparenten Wafern die Lage des Schattens ermitteln. Daraus lässt sich die Lage der Kante des Wafers ermitteln. Allerdings gestaltet sich die Auswertung der exakten Lage des Schattens wegen der Halbschatteneffekte oft schwierig.to Determining the location of the edge of a wafer on a turntable from US 2004/0056216 A1 furthermore a method and a device known. In this case, the wafer lying on a turntable is vertical from below radially outward over his Illuminated edge. One above the Wafer-mounted CCD sensor can with transparent wafers the Location of change absorption or, for non-transparent wafers, the location of the Determine shadow. Leave it determine the location of the edge of the wafer. However, designed the evaluation of the exact position of the shadow because of the penumbra effects often difficult.
Aus „Sensors and Actuators", 17 (1989), Seiten 259–266 ist weiterhin ein optoelektronischer Sensor zum Erfassen der Struktur zweidimensionaler Objekte bekannt. Mit diesem Sensor kann die Kante von transparenten oder nicht-transparenten Wafern ermittelt werden. Hierbei wird mit einer Optik das Licht einer IR-Diode auf eine Fotodiode fokussiert. Der Wafer wird rotierend in den Strahlengang der Optik eingebracht. Abhängig von der Exzentrität des Wafers variiert damit die auf die Fotodiode fallende Lichtmenge. Da diese Lichtmenge proportional zur Position der Kante des Wafers ist, lassen sich daraus wiederum die Polarkoordinaten des Wafers für alle Drehwinkel berechnen. Damit kann zum einen auf die Form des Wafers geschlossen werden und zum anderen die Exzentrität des Wafers ermittelt werden.From "Sensors and Actuators ", 17 (1989), pages 259-266 is also an optoelectronic sensor for detecting the structure known two-dimensional objects. With this sensor, the edge of transparent or non-transparent Wafers are determined. This is the optics with a light an IR diode focused on a photodiode. The wafer becomes rotating introduced into the optical path of the optics. Depending on the eccentricity of the wafer thus varies the amount of light falling on the photodiode. This one Amount of light is proportional to the position of the edge of the wafer in turn, the polar coordinates of the wafer for all angles of rotation to calculate. Thus, on the one hand closed on the shape of the wafer and on the other hand the eccentricity of the wafer can be determined.
Bei diesem Verfahren ist es allerdings erforderlich, als Beleuchtungsquelle einen bestimmten IR-LED zu verwenden. Zudem wird erheblicher Bauraum unterhalb und oberhalb der Ebene der Oberfläche des Wafers benötigt.at however, this method is required as a source of illumination to use a specific IR LED. In addition, considerable space needed below and above the plane of the surface of the wafer.
Aufgabe der vorliegenden Erfindung ist es daher, ein Verfahren und eine Vorrichtung zum Erkennen der Lage einer Kante eines Wafers vorzuschlagen, das ein genaues Ermitteln der Lage der Kante ermöglicht und mit dem der erforderliche Bauraum verkleinert werden kann.task The present invention is therefore a method and a To propose a device for detecting the position of an edge of a wafer, which allows a precise determination of the position of the edge and with which the required Installation space can be reduced.
Diese Aufgabe wird gemäß der vorliegenden Erfindung durch eine Vorrichtung zur Bestimmung der Lage der Kante eines Wafers mit den Merkmalen gemäß Anspruch 1 gelöst. Im Hinblick auf das Verfahren wird die Aufgabe durch ein Verfahren zur Bestimmung der Lage der Kante eines Wafers mit den Merkmalen gemäß Anspruch 5 gelöst.These Problem is in accordance with the present invention by a device for determining the position of the edge of a wafer with the features according to claim 1 solved. With regard to the procedure, the task is solved by a procedure for determining the position of the edge of a wafer with the features according to claim 5 solved.
Die erfindungsgemäße Vorrichtung zur Bestimmung der Lage einer Kante umfasst also eine Beleuchtungseinrichtung, die den Wafer zumindest teilweise beleuchtet. Die Beleuchtungseinrichtung wird dabei so positioniert, dass mit den von der der Beleuchtungseinrichtung ausgehenden Lichtstrahlen an deren Auftreffpunkt am Wafer ein Reflexionspunkt erzeugt wird. Zusätzlich wird der Sensor so angeordnet, dass der Reflexionspunkt auf den Sensor abgebildet wird.The inventive device for determining the position of an edge thus comprises a lighting device, which at least partially illuminates the wafer. The lighting device will In doing so, positioned with those of the lighting device outgoing light rays generated at the point of impact on the wafer a reflection point becomes. additionally the sensor is placed so that the reflection point on the Sensor is mapped.
Zur Abbildung des Reflexionspunktes auf den Sensor kann eine Optik, insbesondere eine Linse oder ein Linsensystem vorgesehen werden. Bevorzugt wird die Beleuchtungseinrichtung radial außerhalb des Wafers im Wesentlichen in der Ebene der Oberfläche des Wafers angeordnet. Allerdings kann die Beleuchtungseinrichtung auch schräg unterhalb der Oberfläche des Wafers angeordnet werden.to Illustration of the reflection point on the sensor can be an optic, In particular, a lens or a lens system may be provided. Preferably, the illumination device is radially outward of the wafer essentially in the plane of the surface of the wafer Wafers arranged. However, the lighting device can also aslant below the surface of the wafer.
Beim erfindungsgemäßen Verfahren wird die Kante eines Wafers erfasst, der auf einem Drehtisch aufgebracht ist. Die Beleuchtungseinrichtung zur Beleuchtung des Wafers sowie ein positionsempfindlicher Sensor sind dabei derart positioniert, dass mit der Beleuchtungseinrichtung am Wafer ein Reflektionspunkt erzeugt und ein Bild des Reflexionspunktes auf den Sensor übertragen wird.In the method according to the invention, the edge of a wafer is detected, which is applied to a turntable. The illumination device for illuminating the wafer and a position-sensitive sensor are positioned in such a way that with the illumination device on the wafer generates a reflection point and an image of the reflection point is transmitted to the sensor.
In einer bevorzugten Ausführungsform der Erfindung wird der Reflexionspunkt an der Kante des Wafers erzeugt und der Wafer während der Bestimmung der Lage der Kante mit dem Drehtisch gedreht.In a preferred embodiment According to the invention, the reflection point is generated at the edge of the wafer and the wafer during the determination of the position of the edge turned with the turntable.
Weiterhin kann das Verfahren dadurch verbessert werden, dass aus der Lage der Kante des Wafers dessen Exzentrität berechnet und aus der Exzentrität die Lage der Mitte des Wafers und/oder dessen rotatorische Ausrichtung ermittelt wird.Farther The process can be improved by being out of the situation the edge of the wafer whose eccentricity is calculated and the eccentricity the position the center of the wafer and / or its rotational orientation determined becomes.
Mit dem erfindungsgemäßen Verfahren ist es nun möglich, bauraumsparend und präzise die Lage der Kante eines Wafers sowie dessen Form genau zu ermitteln.With the method according to the invention is it possible now space-saving and precise to accurately determine the position of the edge of a wafer and its shape.
Weitere Vorteile und vorteilhafte Ausführungsformen der Erfindung sind Gegenstand der nachfolgenden Figuren sowie deren Beschreibungen, bei deren Darstellung zugunsten der Übersichtlichkeit auf eine maßstabsgetreue Wiedergabe verzichtet wurde.Further Advantages and advantageous embodiments The invention are the subject of the following figures and their Descriptions, in their representation in favor of clarity on a scale Play was omitted.
Es zeigen im Einzelnen:It show in detail:
In
Die
auf die Kante
Da
sich der Wafer
Da
die Bewegung des Reflexionspunktes
Wie
in
Claims (12)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200610017423 DE102006017423A1 (en) | 2006-04-13 | 2006-04-13 | Semiconductor wafer`s edge determining device, has illumination device arranged such that reflection point is produced with light beam at hitting point at wafer, and position-sensitive sensor arranged so that point is represented on sensor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200610017423 DE102006017423A1 (en) | 2006-04-13 | 2006-04-13 | Semiconductor wafer`s edge determining device, has illumination device arranged such that reflection point is produced with light beam at hitting point at wafer, and position-sensitive sensor arranged so that point is represented on sensor |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102006017423A1 true DE102006017423A1 (en) | 2007-10-18 |
Family
ID=38514587
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE200610017423 Withdrawn DE102006017423A1 (en) | 2006-04-13 | 2006-04-13 | Semiconductor wafer`s edge determining device, has illumination device arranged such that reflection point is produced with light beam at hitting point at wafer, and position-sensitive sensor arranged so that point is represented on sensor |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102006017423A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8406918B2 (en) | 2009-12-21 | 2013-03-26 | WD Media, LLC | Master teaching jig |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5504345A (en) * | 1994-04-14 | 1996-04-02 | Hama Laboratories, Inc. | Dual beam sensor and edge detection system and method |
US6710364B2 (en) * | 1999-09-24 | 2004-03-23 | Texas Instruments Incorporated | Semiconductor wafer edge marking |
DE102004025150A1 (en) * | 2004-05-21 | 2005-12-15 | Mattson Thermal Products Gmbh | Orientation of a semiconductor substrate on a rotating device |
-
2006
- 2006-04-13 DE DE200610017423 patent/DE102006017423A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5504345A (en) * | 1994-04-14 | 1996-04-02 | Hama Laboratories, Inc. | Dual beam sensor and edge detection system and method |
US6710364B2 (en) * | 1999-09-24 | 2004-03-23 | Texas Instruments Incorporated | Semiconductor wafer edge marking |
DE102004025150A1 (en) * | 2004-05-21 | 2005-12-15 | Mattson Thermal Products Gmbh | Orientation of a semiconductor substrate on a rotating device |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8406918B2 (en) | 2009-12-21 | 2013-03-26 | WD Media, LLC | Master teaching jig |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE102010053422B3 (en) | Measurement of the positions of centers of curvature of optical surfaces of a multi-lens optical system | |
DE3926349C2 (en) | ||
DE102011117523B3 (en) | Device for optically determining the surface geometry of a three-dimensional sample | |
WO2004017016A2 (en) | Device and method for measuring the dimensions of a body | |
WO2015044035A1 (en) | Confocal light microscope and method for examining a sample using a confocal light microscope | |
DE102019201272B4 (en) | Device, measuring system and method for detecting an at least partially reflective surface using two reflection patterns | |
DE102015201823A1 (en) | Device for the automated classification of the quality of workpieces | |
DE102011078833A1 (en) | Method of detecting mark on transparent object e.g. ophthalmic lens, involves directing the light beams reflected by imaging beam deflection and retro-reflective surface of retro-reflector surface, against each other for preset time | |
DE102019105622B4 (en) | Collimator and method of testing a camera | |
DE202017006788U1 (en) | Device for optically inspecting a cylinder inner wall | |
DE10325443A1 (en) | Interferometric measuring device | |
DE102007007192A1 (en) | Measuring arrangement for detecting surface of e.g. pipe, has mirror arrangement with mirrors that are arranged such that part of measuring area is guided to surface of object to be detected through mirrors | |
DE20017739U1 (en) | Devices for the optical measurement of an object, with a coordinate measuring machine with a camera | |
DE10234756B3 (en) | Autofocus module for microscope employs prism to deflect measurement beam through cylindrical lens onto detector with two or more lines | |
DE102006017423A1 (en) | Semiconductor wafer`s edge determining device, has illumination device arranged such that reflection point is produced with light beam at hitting point at wafer, and position-sensitive sensor arranged so that point is represented on sensor | |
DE102013211286A1 (en) | Method for measuring a workpiece with an optical sensor | |
DE102008048574A1 (en) | Light ray's impact point identifying device, has light source for emitting light ray, and reflecting element formed of two single reflectors, where one of single reflectors is changeable by adjustment process | |
EP3899423A1 (en) | Device, measurement system and method for capturing an at least partly reflective surface using two reflection patterns | |
DE10026830A1 (en) | Optical sensor for measuring the distance and / or the inclination of a surface | |
DE4339710A1 (en) | Opto-electronic displacement measuring apparatus | |
DE112009001936B4 (en) | Inspection device and method for the optical examination of object surfaces, in particular wafer edges | |
DE102008041135A1 (en) | Inspection device and method for the optical examination of object surfaces, in particular a wafer shot | |
WO1995012809A1 (en) | Illumination and imaging arrangement | |
DE2044533A1 (en) | Mirror microscope | |
DE202006017496U1 (en) | Optical inspection system for specular reflection surface, has beamsplitter arranged at angle to optical axis of light source, other than point source, whose minimum dimension in plane equals twice to ten-times pupil diameter |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
8130 | Withdrawal |