CN110387530A - A kind of circle pot fixture and a kind of coating apparatus - Google Patents

A kind of circle pot fixture and a kind of coating apparatus Download PDF

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Publication number
CN110387530A
CN110387530A CN201910747796.XA CN201910747796A CN110387530A CN 110387530 A CN110387530 A CN 110387530A CN 201910747796 A CN201910747796 A CN 201910747796A CN 110387530 A CN110387530 A CN 110387530A
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CN
China
Prior art keywords
chuck body
wafer jig
circle
pot
wafer
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Pending
Application number
CN201910747796.XA
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Chinese (zh)
Inventor
王广才
欧琳
李菁
王静
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Nankai University
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Nankai University
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Priority to CN201910747796.XA priority Critical patent/CN110387530A/en
Publication of CN110387530A publication Critical patent/CN110387530A/en
Pending legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/06Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
    • C23C14/14Metallic material, boron or silicon
    • C23C14/16Metallic material, boron or silicon on metallic substrates or on substrates of boron or silicon
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/22Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
    • C23C14/24Vacuum evaporation
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/22Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
    • C23C14/50Substrate holders
    • C23C14/505Substrate holders for rotation of the substrates

Abstract

The application provides a kind of round pot fixture and a kind of coating apparatus, wherein the circle pot fixture includes: rotating mechanism, circle pot clamp rail, circle pot chuck body, wafer jig and planetary rotation mechanism;The centripetal side of the circle pot chuck body is equipped with the wafer jig, and the circle pot chuck body is connect with the wafer jig by wafer jig bearing;When the round pot chuck body revolution is with rotation, the circle pot chuck body drives the wafer jig to carry out the spinning motion opposite with the round pot chuck body sense of rotation around the wafer jig bearing by the planetary rotation mechanism.The circle pot fixture of the application can greatly improve the uniformity of wafer plated film by the spinning motion of the revolution of circle pot chuck body, rotation and wafer jig.

Description

A kind of circle pot fixture and a kind of coating apparatus
Technical field
This application involves field of vacuum coating, and in particular to a kind of circle pot fixture and a kind of coating apparatus.
Background technique
Using relatively broad in the industries such as semiconductor, optics, coating film thickness uniformity is a kind of generally to need for vacuum coating It asks.For example, needing to be deposited indium stibide film in wafer substrate when preparing film-type indium antimonide Hall unit, light is then used Indium stibide film corrosion is the figure of a cross as the sensitive layer of Hall element by the method for carving corrosion.After corrosion Cross indium antimonide sensitive layer on upper aluminum layer is deposited again as electrode, form tube core.The weight of film-type indium antimonide Hall unit Parameter is wanted, as Hall voltage, unbalance voltage, input resistance and output resistance are related with the thickness of indium stibide film.If antimony In uneven thickness, the then input electricity of the indium stibide film Hall element between the different location of wafer and different wafer of indium film Resistance, output resistance, unbalance voltage and Hall voltage are different, cause the consistency of film-type indium antimonide Hall unit parameter Difference, it is then unqualified more than certain range, cause yields to decline, while manufacturing cost increases.
By taking vacuum thermal evaporation plated film as an example, thermal evaporation sources are considered as an evaporation source or facet evaporation source, substrate distance evaporation There is a certain distance in source, and in a vacuum, the atom or molecule being evaporated from evaporation source, most of atom or molecule can be with The mode of linear motion deposits on substrate, needs to rotate substrate, upsets atom or molecule falls motion profile on substrate, To obtain plated film in homogeneous thickness.The method that substrate rotation generally has Plane Rotation and planetary rotation.The structure letter of Plane Rotation method It is single, thus it is more commonly used, but it is not readily available relatively uniform plated film.Although planetary rotation method is easy to obtain compared with Plane Rotation method Relatively uniform plated film, but relatively high plated film is required for film thickness uniformity, though using planetary rotation, also without Method is met the requirements.Just as the earth round the sun, although there is revolution, also there are rotation, the South Pole or the arctic of the earth and equator Compare, obtain the irradiation intensity of sunlight be it is non-uniform, tellurian temperature is also non-uniform.Therefore, the prior art Planetary rotation method is unable to satisfy the relatively high plated film scene of coating film thickness uniformity requirement.
Summary of the invention
The application provides a kind of round pot fixture, can not obtain more evenly plated film to solve existing planetary rotation vacuum coating The problem of.Meanwhile the application provides a kind of coating apparatus simultaneously.
The application provides a kind of round pot fixture, comprising: circle pot chuck body, wafer jig and planetary rotation mechanism;
The centripetal side of the circle pot chuck body is equipped with the wafer jig, the circle pot chuck body and the wafer Fixture is connected by wafer jig bearing;
When the round pot chuck body revolution is with rotation, the circle pot chuck body passes through planetary rotation mechanism band It moves the wafer jig and carries out the spinning motion opposite with the round pot chuck body sense of rotation around the wafer jig bearing.
Optionally, the planetary rotation mechanism includes central gear and driven gear;The driven gear and the center Gear is meshed, and when realizing the central gear rotary motion, drives the driven gear rotary motion.
Optionally, the central gear is fixed on the one of the round pot chuck body vest by the round pot fixture bearing Side;Wherein, the bearing rod of the round pot fixture is engaged by strong slot with the central gear, to realize in the round pot fixture When ontology carries out rotation, the central gear is driven to carry out spinning motion;
The driven gear is fixed with the wafer jig by the wafer jig bearing;Wherein, the wafer jig Bearing rod engage by strong slot with the driven gear, with realize the central gear by described in engagement system drive from When moving gear is rotated, the wafer jig bearing is surrounded, passes through the further band of the rotary motion of the driven gear It moves the wafer jig and carries out spinning motion.
Optionally, the side of the round pot chuck body vest is arranged in the driven gear.
Optionally, the bearing holder (housing, cover) of the wafer jig is equipped with a big hole, sets that there are three small around the big hole Screw hole;The docking location of the bearing holder (housing, cover) of the circle pot chuck body and the wafer jig is equipped with and the great circle pore size Corresponding and matched big hole, and, three small sircle holes corresponding and matched with three primary screw pore sizes.
Optionally, the round pot fixture bearing and the wafer jig bearing are ceramic material.
Optionally, circular concave there are two being set on the wafer jig, described two circular concaves and the wafer clamp Tool is concentric circles.
Optionally, notch is provided on the edge of the wafer jig, the notch is for picking and placing wafer.
Optionally, it avoids being equipped with spring pressure bar at the notch at the edge of the wafer jig.
In addition the application provides a kind of coating apparatus, comprising: rotating mechanism, circle pot clamp rail, circle pot chuck body, crystalline substance Circle fixture and planetary rotation mechanism;
The circle pot chuck body is connect with the rotating mechanism by circle pot fixture bearing, and the circle pot fixture bearing exists When the rotating mechanism rotates, it is able to drive the round pot chuck body and revolves on the round pot clamp rail, simultaneously The circle pot chuck body carries out rotation around the round pot fixture bearing;
The centripetal side of the circle pot chuck body is equipped with the wafer jig, the circle pot chuck body and the wafer Fixture is connected by wafer jig bearing;
When the round pot chuck body revolution is with rotation, the circle pot chuck body passes through planetary rotation mechanism band It moves the wafer jig and carries out the spinning motion opposite with the round pot chuck body sense of rotation around the wafer jig bearing.
Optionally, the planetary rotation mechanism includes central gear and driven gear;The driven gear and the center Gear is meshed, and when realizing the central gear rotary motion, drives the driven gear rotary motion.
Optionally, the central gear is fixed on the one of the round pot chuck body vest by the round pot fixture bearing Side;Wherein, the bearing rod of the round pot fixture is engaged by strong slot with the central gear, to realize in the round pot fixture When ontology carries out rotation, the central gear is driven to carry out spinning motion;
The driven gear is fixed with the wafer jig by the wafer jig bearing;Wherein, the wafer jig Bearing rod engage by strong slot with the driven gear, with realize the central gear by described in engagement system drive from When moving gear is rotated, the wafer jig bearing is surrounded, passes through the further band of the rotary motion of the driven gear It moves the wafer jig and carries out spinning motion.
Optionally, the side of the round pot chuck body vest is arranged in the driven gear.
Optionally, the bearing holder (housing, cover) of the wafer jig is equipped with a big hole, sets that there are three small around the big hole Screw hole;The docking location of the bearing holder (housing, cover) of the circle pot chuck body and the wafer jig is equipped with and the great circle pore size Corresponding and matched big hole, and, three small sircle holes corresponding and matched with three primary screw pore sizes.
Optionally, the round pot fixture bearing and the wafer jig bearing are ceramic material.
Optionally, circular concave there are two being set on the wafer jig, described two circular concaves and the wafer clamp Tool is concentric circles.
Optionally, notch is provided on the edge of the wafer jig, the notch is for picking and placing wafer.
Optionally, it avoids being equipped with spring pressure bar at the notch at the edge of the wafer jig.
Optionally, the rotating mechanism includes: rotary shaft, rotation driving lever, runing rest and handgrip;
The rotary shaft is connect with the rotation driving lever, and in rotary shaft rotation, the rotation driving lever is stirred described Runing rest rotation;
Described handgrip one end is mounted on the runing rest;The other end of the handgrip is connected and fixed the round pot folder Have on bearing, the round pot chuck body rotation is driven by the round pot fixture bearing in runing rest rotation to realize Rotate into row revolution and rotation.
Compared with prior art, the application has the following advantages:
The application provides a kind of round pot fixture and a kind of coating apparatus, wherein the circle pot fixture include: rotating mechanism, Circle pot clamp rail, circle pot chuck body, wafer jig and planetary rotation mechanism;The centripetal side of the circle pot chuck body Equipped with the wafer jig, the circle pot chuck body is connect with the wafer jig by wafer jig bearing;In the circle When pot chuck body revolution is with rotation, the circle pot chuck body by the planetary rotation mechanism drive wafer jig around The wafer jig bearing carries out the spinning motion opposite with the round pot chuck body sense of rotation.The circle pot fixture of the application By the spinning motion of the revolution of circle pot chuck body, rotation and wafer jig, the uniform of wafer plated film can be greatly improved Property, compared with Plane Rotation and planetary rotation structure, the application reduces the strict demand to evaporation boat position.
Detailed description of the invention
Fig. 1 is indium stibide film schematic diagram in uneven thickness.
Fig. 2A is the indium stibide film erosion case schematic diagram when uneven indium stibide film etching time is shorter.
Fig. 2 B is the indium stibide film erosion case schematic diagram when uneven indium stibide film etching time is longer.
Fig. 3 is the coating apparatus structural schematic diagram of the application.
Fig. 4 is that the circle pot fixture of the application installs the schematic diagram of wafer jig.
Fig. 5 is the connection relationship and operation principle schematic diagram of the planetary rotation mechanism of the application.
Fig. 6 is the driven gear structural schematic diagram of the application.
Fig. 7 is the structural schematic diagram for the circle pot chuck body that the application is used to install planetary rotation mechanism and wafer jig.
Fig. 8 is the structural schematic diagram of the wafer jig of the application.
The first viewing angle constructions schematic diagram when Fig. 9 A is the wafer jig clamping wafer of the application.
The second viewing angle constructions schematic diagram when Fig. 9 B is the wafer jig clamping wafer of the application.
Third viewing angle constructions schematic diagram when Fig. 9 C is the wafer jig clamping wafer of the application.
Specific embodiment
Many details are explained in the following description in order to fully understand the application.But the application can be with Much it is different from other way described herein to implement, those skilled in the art can be without prejudice to the application intension the case where Under do similar popularization, therefore the application is not limited by following public specific implementation.
Rotation of substrate is generally divided into Plane Rotation substrate and planetary rotation substrate.Plane Rotation substrat structure is simple, so It is more commonly used, but it is not readily available relatively uniform plated film.Therefore the higher scene of uniformity coefficient is required for plated film, generally Without using Plane Rotation substrate, and use planetary rotation substrate.Compared to Plane Rotation substrate, planetary rotation substrate is easier The relatively uniform plated film of thickness is obtained to need to plate using planetary rotation substrate in the relatively high occasion of plated film uniformity requirement Film.This is main related with the mechanism of plated film, and the mechanism description of plated film is as follows.
Illustrate by taking vacuum thermal evaporation plated film as an example, thermal evaporation sources can be considered as evaporation source or facet evaporation source. Substrate distance evaporation source has a certain distance, and in a vacuum, the atom or molecule being evaporated from evaporation source are more than in a vacuum 95% or more atom or molecule can deposit on substrate in a manner of linear motion.When Substrate Area is bigger, such as in line footpath It on substrate more than 50mm, or is distributed on different substrates on certain space, in order in extensive substrate or different empty Between obtain relatively uniform coating film thickness on substrate on position, generally evaporation source is placed on off-centered position, is steamed The position risen needs to accurately calculate, and the relatively uniform plated film of thickness is obtained by rotation of substrate.Above-mentioned planetary rotation Substrate revolves on one side when rotated just as the earth around the sun, one side rotation.Therefore, planetary rotation method is easier to obtain The relatively uniform plated film of thickness.But when substrate dimension is bigger, and to the substrate coating film thickness one of same batch different location Cause property requires higher scene, even if being also unable to satisfy requirement using planetary rotation.Just as the earth round the sun, although having Revolution also has rotation, but the South Pole of the earth or the arctic, compared to equator, the irradiation intensity that the two poles of the earth obtain sunlight with equator is Different, therefore, tellurian the two poles of the earth are also non-uniform with equator temperature.Therefore, the planetary rotation method of the prior art is not yet Easily obtain relatively uniform plated film.
However, vacuum coating, such as thermal evaporation, electron beam, magnetron sputtering, reaction and plasma vacuum coating, it is desirable to Film plating layer in homogeneous thickness is obtained on substrate.This is mainly due to when preparing device, film plating layer (or sedimentary) uneven thickness The performances such as the even electricity that will affect device, optics.For example, being steamed in a piece of glass substrate using the method for Electron beam evaporation Plate transparent indium tin oxide conductive film (ITO), if on the different location of glass ITO in uneven thickness, the different location of ITO Square resistance and light transmitance it is different.In general, the thicker region of thickness, square resistance is smaller, light it is saturating It is relatively low to cross rate;Conversely, thickness is than relatively thin region, square resistance is bigger, and the transmitance of light is relatively high.
For another example, antimony is deposited in the monocrystalline substrate of a piece of 4 inches of single-sided polishing using the method for thermal evaporation plated film Change indium film, then using the method for photoetching corrosion to corrode indium stibide film is the figure of a cross as Hall element Sensitive layer, the size of the indium antimonide cross sensitive layer after corrosion is about 0.35mm × 0.35mm, then be deposited upper aluminum layer work For electrode, so that it may form a tube core.The size of tube core is about 0.75mm × 0.75mm, therefore in a piece of 4 inches of wafer On can obtain about 10,000 tube cores.The important parameter of indium antimonide Hall unit, such as Hall voltage, unbalance voltage, input Resistance and output resistance etc., it is on the one hand related with the length of indium antimonide cross sensitive layer and width, it is on the other hand also thin with indium antimonide The thickness of film is related.If on wafer, indium stibide film it is in uneven thickness, then can significantly affect indium antimonide Hall unit Electric property, leading to the electric property of the tube core in some regions in 10,000 tube cores is qualified, the electrical property in some regions It can be underproof, the yields reduction of such chip, the increased costs of Hall element.
As shown in Figure 1, the thickness 102 of indium stibide film is uneven, the indium antimonide on the left of wafer on 4 inch wafers 103 Film 102 compares thick, and the indium stibide film 102 on right side is than relatively thin.During the photoetching corrosion of indium stibide film, it may appear that such as Lower two kinds of situations: when 102 etching time of indium stibide film for being placed in 101 downside of photoresist is short, than relatively thin antimony on the right side of wafer When indium film 102 has been corroded in place, the thicker indium stibide film 102 in left side corrodes in place not yet, the indium antimonide in left side Tube core just becomes defective products (as shown in Figure 2 A).Alternatively, etching time is long, the thicker indium stibide film 102 in left side is eroded to When position, right side will form undercut, and the indium antimonide tube core on right side is with regard to unqualified (as shown in Figure 2 B).
In general, in a coating process, more wafers be will be installed on fixture.For example, being in bell jar diameter The thermal evaporation vacuum coating equipment last time of the planetary rotation frock clamp of 450mm can install 12 4 inch wafers.If a certain Film plating layer is in uneven thickness on wafer, then in 12 wafers of the different location of frock clamp, between wafer and wafer Indium stibide film thickness it is all uneven, in this way can to batch production lithography corrosion process bring great inconvenience.Because every The thickness of indium stibide film is all uneven on wafer, and every wafer time used when corroding is different from, therefore just More wafers cannot once be corroded, need to corrode one by one.If corroding the indium antimonide on more wafers, tube core simultaneously at this time Yields can be relatively low.
Therefore, it is extremely important for semicon industry that indium stibide film in homogeneous thickness is obtained on wafer.In this regard, this Shen A kind of coating apparatus please be provide, while the coating apparatus of the application can realize uniform coated on different wafers.It uses below The coating apparatus of the application is described in specific embodiment.
Embodiments herein provides a kind of coating apparatus, as shown in figure 3, it is coating apparatus knot provided in this embodiment Structure schematic diagram, described device include: round pot clamp rail 301, circle pot chuck body 302, wafer jig 308, rotating mechanism with And planetary rotation mechanism.Wherein, the round pot chuck body 302 and the rotating mechanism are by being mounted on round pot chuck body Circle pot fixture bearing 303 on 302 connects.When rotary shaft 304 rotates under the power effect of motor, rotation driving lever 305 is driven Rotation, and then stir runing rest 306 and handgrip 307 is rotated, pass through circle pot fixture bearing 303 and drives circle pot chuck body 302 revolve in circle pot clamp rail 301.Meanwhile circle pot chuck body 302 revolves on circle pot clamp rail 301 While, additionally it is possible to rotation is carried out around the round pot fixture bearing 303, forms planetary rotation.It is understood that public It is just the opposite with sense of rotation to turn direction, for example, as shown in figure 3, when circle pot chuck body 302 is on circle pot clamp rail 301 It carries out when revolution rotation counterclockwise (rotary shaft 304 rotates counterclockwise in such as Fig. 3), at this point, circle pot chuck body 302 is around circle pot Fixture bearing 303 carries out rotation rotation clockwise.
In the present embodiment, the rotating mechanism include: rotary shaft 304, rotation driving lever 305, runing rest 306 and and Three handgrips 307 being fixedly mounted on runing rest 306.With continued reference to Fig. 3, the rotary shaft 304 and the rotation driving lever 305 connections, meanwhile, rotary shaft 304 is located at the center that three round pot chuck bodies 302 form superstructure.The rotation Axis 304 when extraneous powered belt moves (such as motor) rotation, stir the runing rest 306 and rotate by the rotation driving lever 305.In After runing rest 306 rotates, the round pot fixture bearing 303 of three be respectively mounted on three handgrips 307 will drive three round pots Chuck body 302 carries out revolution rotation on circle pot clamp rail 301, while circle pot chuck body 302 is around circle pot clamp shaft Hold 303 carry out rotation rotations.
Why rotating mechanism is able to drive round pot chuck body 302 and carries out revolution and rotation, mainly and rotating mechanism It is related with the circle connection type of pot chuck body 302.Specifically, 307 one end of handgrip of rotating mechanism is fixedly mounted on the rotation Turn on bracket 306, other end is connected and fixed on round pot fixture bearing 303, can in the runing rest 306 rotation with realization To drive round 302 rotation of pot chuck body to carry out revolution and rotation by the round pot fixture bearing 303.
Wafer jig 308 is additionally provided in the circle pot chuck body 302 of the present embodiment, wafer jig 308 is for placing Wafer.Coating apparatus provided in this embodiment can also be while circle pot chuck body 302 rotates, and wafer jig 308 can be with Circle pot chuck body 302 generates relative motion, to realize the uniform coated of higher degree.
Specifically, wafer jig 308 is mounted in circle pot chuck body 302.As shown in figure 4, it is circle pot fixture installation Wafer jig schematic diagram.In the present embodiment, there are four wafer clamps for the centripetal side installation of each round pot chuck body 302 Tool 308.In the embodiment of the present application, the round pot chuck body 302 is the structure being recessed inwardly, by the round pot chuck body The side of 302 indents is referred to as centripetal side, accordingly, the other side of the round pot chuck body 302 is referred to as vest Side.Planetary rotation mechanism, and the round pot are provided between the circle pot chuck body 302 and the wafer jig 308 Chuck body 302 is connected with the wafer jig 308 by wafer jig bearing 309 (Fig. 4 is not shown, and shows in Fig. 3 and Fig. 5) It connects.When the round pot chuck body 302 carries out rotation around the round pot fixture bearing 303,302 energy of circle pot chuck body Enough four wafer jigs 308 are driven to carry out around the wafer jig bearing 309 and institute by the planetary rotation mechanism State the opposite spinning motion in round 302 direction of rotation of pot chuck body.Using above-mentioned connection type, realize in circle pot chuck body Relative rotation between 302 and wafer jig 308, i.e. wafer jig 308 can carry out rotation in the round pot chuck body 302 When, the spinning motion opposite with round pot 302 direction of rotation of chuck body is carried out around wafer jig bearing 309.
Above-mentioned wafer jig 308 when the round pot chuck body 302 carries out rotation, around wafer jig bearing 309 into The principle of the capable spinning motion opposite with round pot 302 direction of rotation of chuck body, mainly be mounted on round fixture 308 and justify Planetary rotation mechanism between pot chuck body 302 is related.In the present embodiment, planetary rotation mechanism includes central gear 310 (referring to Fig. 5) and driven gear 311 (referring to Fig. 5).In following description given, be mounted on a round pot chuck body 302 with And it is illustrated for a set of planetary rotation mechanism on corresponding four wafer jigs 308.
As shown in figure 5, it is the connection relationship and operation principle schematic diagram of planetary rotation mechanism.In circle pot chuck body The reverse side (side of the vest of i.e. round pot chuck body 302) of 302 clamping wafer jigs 308, is equipped with a centre tooth Wheel 310 and four driven gears 311.Four driven gears 311 are driven in a manner of engaging with the central gear 310 to be connect Touching, when realizing 310 rotary motion of central gear, drives 311 rotary motion of driven gear.
When the circle pot chuck body 302 carries out rotation, why it is able to drive wafer jig 308 and is rotated, in The fixed form of heart gear 310 and circle pot chuck body 302, and, the fixed form of driven gear 311 and wafer jig 308 It is related.
In this application, central gear 310 with circle pot chuck body 302 is fixed by circle pot fixture bearing 303; Wherein, the bearing rod of the round pot fixture is engaged by strong slot with the central gear 310, and central gear 310 is fixed On the bearing holder (housing, cover) of circle pot fixture bearing 303, to realize when circle pot chuck body 302 carries out spinning motion, drive in described Heart gear 310 synchronizes spinning motion.Similarly, the corresponding wafer jig 308 of driven gear 311 passes through wafer jig Bearing 309 is fixed;Wherein, the bearing rod of the wafer jig is engaged by strong slot with driven gear 311, and by driven gear 311 are fixed on the side of round 302 vest of pot chuck body, to realize that central gear 310 drives driven tooth by engagement system When wheel 311 is rotated, the wafer jig bearing is surrounded, is further driven to by the rotary motion of driven gear 311 The wafer jig 308 carries out spinning motion.
Specifically, central gear 310 is fixed on the bearing holder (housing, cover) of round pot fixture bearing 303.Circle pot chuck body 302 with The bearing rod of the circle pot fixture is fixed, and can be rotated by circle pot fixture bearing 303.Similarly, from The corresponding wafer jig 308 of moving gear 311 is fixed by wafer jig bearing 309;Wherein, the bearing of the wafer jig Bar is engaged by strong slot with driven gear 311;Wafer jig bearing 309 passes through 3 on 309 bearing holder (housing, cover) of wafer jig bearing Corresponding 3 through-holes on corresponding position, are bolted to round pot fixture sheet on threaded hole, and circle pot chuck body 302 On body 302.This 3 threaded holes are located on same circumference, are circumferentially uniformly distributed according to hexagonal angle degree, this circumference and wafer clamp Has 309 concentric of bearing.Wherein, circle pot chuck body 302 on 3 through-holes diameter be slightly larger than 3 threaded holes diameter, 3 A through-hole also is located on the same circumference equal with above-mentioned circle diameter, is circumferentially uniformly distributed according to hexagonal angle degree.In circle Pot chuck body 302 on open a through-hole on the position of the circumference concentric where 3 lead to the hole site, the diameter of this through-hole is wanted Slightly larger than the diameter of the bearing rod of the wafer jig, facilitate the bearing rod of the wafer jig by this through-hole, and can lead to Bearing arrangement is crossed to be rotated freely.By above structure, 309 bearing holder (housing, cover) of wafer jig bearing is fixed on round pot chuck body On 302, by wafer jig bearing 309, the bearing rod rotation of wafer jig, wafer jig are driven when driven gear 311 rotates Bearing rod drive wafer jig 308 to be rotated again.
Circle pot chuck body 302 itself has a rotation when carrying out revolution rotation on circle pot clamp rail 301.Circle When pot 302 rotation of chuck body, 309 bearing holder (housing, cover) of wafer jig bearing also can be around the center of circle pot chuck body 302 i.e. circle pot Fixture bearing 303 is rotated, and 309 bearing holder (housing, cover) of wafer jig bearing surrounds circle pot fixture bearing 303 and forms a circular motion, The central gear 310 being fixed on round 303 bearing holder (housing, cover) of pot fixture bearing drives driven gear 311 to form rotation by engagement system Movement realizes that wafer jig 308 surrounds the rotary motion of circle pot fixture bearing 303.
More specifically, being by one number of teeth of the circle installation of pot fixture bearing 303 on circle 302 center of pot chuck body The central gear 310 that modulus is 3, the number of teeth is 34, wherein central gear 310 is the bearing holder (housing, cover) for being fixed on round pot fixture bearing 303 On.When circle 302 rotation of pot chuck body, central gear 310 rotate with angular speed also with circle pot chuck body 302 and be transported It is dynamic.Accordingly, on each wafer jig 308, a wafer jig bearing 309 is installed, the wafer clamp with rectangular configuration Bearing rod one end of tool welds together with wafer jig 308, and one end passes through the through-hole opened in circle pot chuck body 302, with mould Number is 3, the driven gear 311 that the number of teeth is 28 connection (as shown in Figure 6), and is bolted.It wherein, can from Fig. 6 Out, the pore structure at 311 center of driven gear is matched with the rectangular configuration of the bearing rod of wafer jig.It is connected by above structure Afterwards, it is interlocked in a manner of engaging with central gear 310 with the co-axially fixed driven gear 311 of wafer jig 308.Cause This, when circle pot chuck body 302 circle pot track 301 on carry out planetary rotation when, central gear 310 will drive it is each from Moving gear 311 is rotated, and realizes that wafer jig 308 surrounds the rotary motion of wafer jig bearing 309.In this way on rotating device It there is three kinds of motion profiles, i.e., revolution, rotation and the rotation of wafer jig 308 of round pot chuck body 302.Therefore, originally The coating apparatus of application, which is based on " three rotations " movement, can obtain the very high thin film coating of uniformity coefficient.
Further, as shown in fig. 7, it is the circle pot fixture sheet for installing planetary rotation mechanism Yu wafer jig 308 The structural schematic diagram of body 302.4 wafer jigs 308 are installed in the centripetal side of each round pot chuck body 302, the one of vest Side is installed by planetary rotation mechanism.Having 3 120 ° equally distributed 3 threaded holes on wafer jig bearing holder (housing, cover), (correspondence is three small Screw hole).Accordingly, there are 3 through-holes corresponding with 3 threaded holes on corresponding position in circle pot chuck body 302, In, the diameter of 3 through-holes in circle pot chuck body 302 is slightly larger than the diameter of 3 threaded holes, and 3 through-holes also are located at same circle Zhou Shang is circumferentially uniformly distributed according to hexagonal angle degree.Circle pot chuck body 302 on 3 lead to the hole site where circumference A through-hole is opened on the position of concentric, the diameter of this through-hole is larger than the diameter of the bearing rod of the wafer jig, convenient The bearing rod of the wafer jig can be rotated freely by this through-hole by bearing arrangement.Therefore, pass through bolt Wafer jig bearing holder (housing, cover), wafer jig 308 and circle pot chuck body 302 can be fixed together.More specifically, wafer jig Rectangular shaft on bearing 309 can pass through 3 through-holes in circle pot chuck body 302 round large through-hole and driven gear The rectangular shaped slot at 311 centers, blending bolt are fixed.It realizes and drives wafer jig bearing 309 when driven gear 311 rotates, in turn Wafer jig 308 is driven to rotate.Due to central gear 310 and 311 direction of rotation of driven gear on the contrary, and central gear 310 with Circle 302 direction of rotation of pot chuck body is identical, and driven gear 311 is identical as 308 direction of rotation of wafer jig.Therefore, circle pot Chuck body 302 is opposite with 308 direction of rotation of wafer jig.
Further, since needing to be heated to coating apparatus 100~200 DEG C, and evaporation source will during vacuum coating Be evaporated object heating, can also generate heat, thus circle pot chuck body 302 and the temperature of wafer jig 308 can reach 100~ 200 DEG C or more.Being mentioned in each round pot chuck body 302 in the foregoing description has central gear 310 and 4 driven gear 311, it needs to realize rotary motion by bearing.Therefore, it is intended that bearing is required to need resistance to 200~300 DEG C of high temperature, and Lubricating oil cannot be used (mainly since in vacuum coating, general bearing oil is unbearable 200~300 DEG C High temperature, lubricating oil can evaporate at this temperature, and in addition lubricating oil, which is evaporated, can pollute Coating Materials).It can using ceramic bearing To well solve this problem, ceramic bearing can bear 200 DEG C or so of high temperature, and not need lubricating oil.Therefore, originally The circle pot fixture bearing 303 and wafer jig bearing 309 of application are ceramic material.
Meanwhile in the application, using stainless steel material as wafer jig.The structure of wafer jig is as shown in figure 8, in crystalline substance Circle fixture opens a notch 312 on one side, facilitates pick-and-place wafer.The position for avoiding notch 312 is uniform on the periphery of wafer jig Assembly 3 are furnished with the compression bar 313 of spring, and the center of compression bar 313 can move up and down and be rotated left and right by the aperture on fixture. It should be noted that the length of the side of the compression bar equipped with spring cannot be too long, interference otherwise can be generated with circle pot fixture or is rubbed It wipes.In addition, there are two circular seam allowances for installing wafer for tool on wafer jig.The two round seam allowances and stainless steel are brilliant Circle fixture is concentric circles.314 internal diameter of great circle is 1mm or more bigger than the outer diameter of wafer, such as the outer diameter of 4 inches of wafer is 100mm, The internal diameter of so 314 seam allowance of great circle should be 101~102mm, and 4 inches of wafer can be put into 314 seam allowance of great circle by guarantee.Together The depth of 314 seam allowance of Shi great Yuan than wafer thickness more than 0.2mm or so, such as wafer with a thickness of 0.5mm, then great circle 314 is stopped The depth of mouth is 0.7mm.The internal diameter of 315 seam allowance of roundlet is 10mm smaller or so than the outer diameter of wafer, and such as 4 inches of wafer outer diameter is 100mm, then the internal diameter of 315 seam allowance of roundlet is 90mm or so.The depth of 315 seam allowance of roundlet counts sinking from big round seam allowance plane 0.5mm or so.To guarantee to place the wafer in 314 seam allowance of great circle, 3 compression bars 313 with spring are rotated, so that compression bar 313 Head pressure on the surface of the wafer, wafer can be fixed on wafer jig, and when wafer is placed downwards will not fall down. For example, the first visual angle, the second view as shown in Fig. 9 A, Fig. 9 B and Fig. 9 C, when being the wafer jig clamping wafer of the application Angle and third viewing angle constructions schematic diagram.Wherein, in figure 9 a, visual angle is the oblique view of 316 one side of wafer upward;In Fig. 9 B In, visual angle is 316 one side oblique view directed downwardly of wafer;In Fig. 9 C, visual angle is the side view right above wafer 316 faces.
It is above-mentioned that 315 seam allowance of roundlet is set on wafer jig, mainly since the thickness of wafer current is more and more thinner.Such as 4 The wafer of inch, thickness has the specification of 0.5mm, 0.35mm and 0.25mm, and the wafer thickness the thin, wafer more is easy to happen fragmentation. If the flatness of wafer jig is bad, or in use because heating wafer jig generates deformation, then with 3 band springs Compression bar 313 compress wafer when, can because the out-of-flatness of wafer jig cause wafer generate deformation so that relatively thin wafer is broken It splits.And one roundlet seam allowance is set in the lower section of wafer, the situation of wafer deformation can be significantly improved, and reduce wafer fragmentation Possibility.
In addition, etching Coating Materials using the method for photoetching corrosion after the thicknesses of layers consistency with a batch wafer improves When, these batch wafers can be put into corrosive liquid, such as can once corrode 12 wafers.If different batches wafer Thicknesses of layers is also more uniform, then can once corrode more wafers, and such as 25.Lithography corrosion process can be greatly improved in this way Efficiency.
In the present embodiment, vapor deposition is indium stibide film, and prepares film-type indium antimonide Hall member with this thin-film material Part.And the important parameter of this Hall element has Hall voltage, input and output resistance and unbalance voltage.Film-type indium antimonide is suddenly You have 4 pins by element, are wherein a pair of of pin in X-direction, and Y-direction is a pair of of pin, and due to symmetry, these two pair pin can To exchange, so every kind of parameter is required to the two values of X and Y-direction, amounts to and need 6 numerical value, as long as a wherein numerical value It is not able to satisfy the qualified threshold value of product, then determines that this parameter is unqualified.And any parameter is unqualified, then determines that Hall element does not conform to Lattice.
And indium antimonide film thickness uniformity improves, and the imbalance electricity of film-type indium antimonide Hall unit can be effectively reduced Press Vos.Unbalance voltage Vos mainly reflects the precision of film-type indium antimonide Hall unit technique production, such as cross-type antimony The uniformity of the long and wide symmetry up and down of indium sensitive layer and thicknesses of layers.Long and wide upper of indium antimonide sensitive layer What the symmetry of lower left and right reflected is the accuracy of photoetching overlay alignment, and the uniformity reflection of thicknesses of layers is coating film thickness Uniformity.If thicknesses of layers be it is non-uniform, influence whether being used interchangeably for pin, can also reduce the yield of unbalance voltage. Unbalance voltage Vos is smaller, illustrates that craft precision is higher, and the yield rate of Hall element is higher.And use " three rotations " Vacuum Deposition The film-type indium antimonide Hall unit of embrane method preparation, the yields of unbalance voltage Vos can achieve 98% or more.
In addition, the Hall voltage V of film-type indium antimonide Hall unitHIt is dense with component ratio, crystallinity, the impurity of indium antimonide The parameters such as degree, cross long and wide symmetry and film thickness uniformity are related.For example, film thickness uniformity is not high, Hall voltage can be then reduced, and influences being used interchangeably for Hall element pin, and reduces the yields of Hall element.Similarly, If the thicknesses of layers of indium antimonide is uneven, will affect film-type indium antimonide Hall unit outputs and inputs the consistent of resistance Property, the interchangeability variation of resistance is output and input, the yield rate of Hall element is reduced.
Abundant experimental results using above-mentioned apparatus plated film show: using " three rotations " Vacuum Coating method, being in same 4 English The inhomogeneities of thicknesses of layers on very little wafer is less than 0.05%.In 12 4 inch wafers of the different location of same a batch vapor deposition On, the inhomogeneities of the thicknesses of layers of any two wafer can reach 0.07%.Therefore, which can significantly improve plated film Uniformity.Further, after film thickness uniformity improves on same wafer, the finished product of tube core after photoetching corrosion can be improved The yield rate of rate, substantially tube core can achieve 98% or more, so as to reduce the production cost of chip.
Although the application is disclosed as above with preferred embodiment, it is not for limiting the application, any this field skill Art personnel are not departing from spirit and scope, can make possible variation and modification, therefore the guarantor of the application Shield range should be subject to the range that the claim of this application defined.

Claims (14)

1. a kind of circle pot fixture characterized by comprising circle pot chuck body, wafer jig and planetary rotation mechanism;
The centripetal side of the circle pot chuck body is equipped with the wafer jig, the circle pot chuck body and the wafer jig It is connected by wafer jig bearing;
When the round pot chuck body revolution is with rotation, the circle pot chuck body drives institute by the planetary rotation mechanism It states wafer jig and carries out the spinning motion opposite with the round pot chuck body sense of rotation around the wafer jig bearing.
2. circle pot fixture according to claim 1, which is characterized in that the planetary rotation mechanism include central gear with from Moving gear;The driven gear is meshed with the central gear, when realizing the central gear rotary motion, described in drive Driven gear rotary motion.
3. circle pot fixture according to claim 2, which is characterized in that the central gear passes through the round pot fixture bearing It is fixed on the side of the round pot chuck body vest;Wherein, the bearing rod of the round pot fixture by strong slot and it is described in The engagement of heart gear drives the central gear to carry out spinning motion to realize when the round pot chuck body carries out rotation;
The driven gear is fixed with the wafer jig by the wafer jig bearing;Wherein, the axis of the wafer jig It holds bar and is engaged by strong slot with the driven gear, to realize that the central gear drives the driven tooth by engagement system When wheel is rotated, the wafer jig bearing is surrounded, institute is further driven to by the rotary motion of the driven gear It states wafer jig and carries out spinning motion.
4. circle pot fixture according to claim 3, which is characterized in that the driven gear setting is in the round pot fixture sheet The side of body vest.
5. circle pot fixture according to claim 1, which is characterized in that the bearing holder (housing, cover) of the wafer jig is equipped with one big Circular hole, sets that there are three primary screw holes around the big hole;The bearing holder (housing, cover) of the circle pot chuck body and the wafer jig Docking location be equipped with the corresponding and matched big hole of the great circle pore size, and, with three primary screw pore sizes Corresponding and matched three small sircle holes.
6. circle pot fixture according to claim 1, which is characterized in that the circle pot fixture bearing and the wafer jig axis It holds as ceramic material.
7. circle pot fixture according to claim 1, which is characterized in that round recessed there are two being set on the wafer jig Face, described two circular concaves and the wafer jig are concentric circles.
8. circle pot fixture according to claim 1, which is characterized in that be provided with slot on the edge of the wafer jig Mouthful, the notch is for picking and placing wafer.
9. circle pot fixture according to claim 8, which is characterized in that avoid the notch at the edge of the wafer jig Place is equipped with spring pressure bar.
10. a kind of coating apparatus characterized by comprising rotating mechanism, circle pot clamp rail, circle pot chuck body, wafer clamp Tool and planetary rotation mechanism;
The circle pot chuck body is connect with the rotating mechanism by circle pot fixture bearing, and the circle pot fixture bearing is described When rotating mechanism rotates, it is able to drive the round pot chuck body and revolves on the round pot clamp rail, while is described Circle pot chuck body carries out rotation around the round pot fixture bearing;
The centripetal side of the circle pot chuck body is equipped with the wafer jig, the circle pot chuck body and the wafer jig It is connected by wafer jig bearing;
When the round pot chuck body revolution is with rotation, the circle pot chuck body drives institute by the planetary rotation mechanism It states wafer jig and carries out the spinning motion opposite with the round pot chuck body sense of rotation around the wafer jig bearing.
11. device according to claim 10, which is characterized in that the planetary rotation mechanism include central gear with it is driven Gear;The driven gear is meshed with the central gear, when realizing the central gear rotary motion, drive it is described from Moving gear rotary motion.
12. device according to claim 11, which is characterized in that the central gear is solid by the round pot fixture bearing It is scheduled on the side of the round pot chuck body vest;Wherein, the bearing rod of the round pot fixture passes through strong slot and the center Gear engagement drives the central gear to carry out spinning motion to realize when the round pot chuck body carries out rotation;
The driven gear is fixed with the wafer jig by the wafer jig bearing;Wherein, the axis of the wafer jig It holds bar and is engaged by strong slot with the driven gear, to realize that the central gear drives the driven tooth by engagement system When wheel is rotated, the wafer jig bearing is surrounded, institute is further driven to by the rotary motion of the driven gear It states wafer jig and carries out spinning motion.
13. device according to claim 12, which is characterized in that the driven gear setting is in the round pot chuck body The side of vest.
14. device according to claim 10, which is characterized in that the bearing holder (housing, cover) of the wafer jig is equipped with a great circle Hole, sets that there are three primary screw holes around the big hole;Pair of the bearing holder (housing, cover) of the circle pot chuck body and the wafer jig Connect position be equipped with the corresponding and matched big hole of the great circle pore size, and, with three primary screw pore sizes pair It should be with matched three small sircle holes.
CN201910747796.XA 2019-08-14 2019-08-14 A kind of circle pot fixture and a kind of coating apparatus Pending CN110387530A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115011930A (en) * 2022-05-31 2022-09-06 北海惠科半导体科技有限公司 Evaporation coating device

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JP2002217132A (en) * 2001-01-23 2002-08-02 Sony Corp Vacuum deposition apparatus
WO2016052239A1 (en) * 2014-09-29 2016-04-07 株式会社アルバック Film deposition system
KR101646698B1 (en) * 2015-02-25 2016-08-08 (주)보림시스템 Zig System for Revolving and Rotating in PVD coating machine
CN210314472U (en) * 2019-08-14 2020-04-14 南开大学 Round pot clamp and film coating device

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Publication number Priority date Publication date Assignee Title
JP2002217132A (en) * 2001-01-23 2002-08-02 Sony Corp Vacuum deposition apparatus
WO2016052239A1 (en) * 2014-09-29 2016-04-07 株式会社アルバック Film deposition system
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KR101646698B1 (en) * 2015-02-25 2016-08-08 (주)보림시스템 Zig System for Revolving and Rotating in PVD coating machine
CN210314472U (en) * 2019-08-14 2020-04-14 南开大学 Round pot clamp and film coating device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115011930A (en) * 2022-05-31 2022-09-06 北海惠科半导体科技有限公司 Evaporation coating device

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