US20050103267A1 - Flat panel display manufacturing apparatus - Google Patents
Flat panel display manufacturing apparatus Download PDFInfo
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- US20050103267A1 US20050103267A1 US10/983,832 US98383204A US2005103267A1 US 20050103267 A1 US20050103267 A1 US 20050103267A1 US 98383204 A US98383204 A US 98383204A US 2005103267 A1 US2005103267 A1 US 2005103267A1
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- shielding member
- set forth
- plasma
- substrate pedestal
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32431—Constructional details of the reactor
- H01J37/3244—Gas supply means
Definitions
- the present invention relates to a flat panel display manufacturing apparatus which is capable of performing a predetermined process on a substrate under vacuum using plasma generated in the chamber.
- flat panel display manufacturing apparatuses are classified into wet-etching apparatuses using wet-chemical, and dry-etching apparatuses using inert gas.
- a specific reactive gas is introduced into a strong electric field produced between two substrate pedestals, so that it is changed into an ionized plasma gas while being taken away electrons by the electric field.
- the ionized plasma gas shows high reactivity in a neutral state.
- the reactive gas for use in the operation of the dry-etching apparatus, is introduced into a chamber of the dry-etching apparatus, so as to be used in a predetermined reaction, by passing through a shower head installed in an upper portion of the chamber. After reaction completion, the reactive gas is discharged to the outside via a pumping port formed at one side of the chamber.
- FIG. 1 is a sectional view illustrating the structure of a conventional flat panel display manufacturing apparatus.
- the shower head provided in the conventional dry-etching type apparatus, has a complicated structure wherein a plurality of diffusion plates 4 and 5 are mounted, resulting in an increase in manufacturing costs of the dry-etching apparatus.
- the shower head further comprises a spray plate 6 installed at an open lower surface of a shower head body 3 .
- the spray plate 6 is formed with hundreds to thousands of spray holes, and the diameter of the spray holes is excessively small, less than 1 mm, complicating processing of the spray holes.
- the shower head body 3 and the spray plate 6 are usually made of aluminum, and are externally anodized. In this case, if a specific region of the anodized aluminum is damaged by plasma and exposed to the outside, electric current is instantaneously concentrated on the exposed aluminum of the shower head body and the spray plate, causing an arcing phenomenon.
- the shower head serves as an upper substrate pedestal. Once the arcing phenomenon occurs, partial particles of the anodized aluminum are separated and act as contaminants.
- the chamber of the flat panel display manufacturing apparatus has a substrate entrance/exit opening formed to communicate with the outside, and a gate is provided external to the substrate entrance/exit opening to open or close it.
- a gate is provided external to the substrate entrance/exit opening to open or close it.
- an inner wall surface of the chamber defined by the substrate entrance/exit opening recedes from the substrate pedestals as compared to the remaining wall surface of the chamber. This provides the chamber with an asymmetrical interior space about the substrate pedestals and generates uneven plasma flow inside the chamber, resulting in uneven processing of substrates.
- the present invention has been made in view of the above problems, and it is an object of the present invention to provide a flat panel display manufacturing apparatus having a shower head, which has a simplified structure and is easy to manufacture.
- a flat panel display manufacturing apparatus comprising: a chamber under vacuum, a substrate pedestal located in a lower portion of the chamber, on the substrate pedestal being disposed a substrate so that a predetermined process is performed on the substrate using plasma generated in the chamber, and a shower head, wherein the shower head comprises: a shower head body located in an upper portion of the chamber, the shower head body having a hollow structure opened at a lower surface thereof; a diffusion plate horizontally mounted in the shower head body and having a plurality of diffusion holes formed through predetermined positions; a spray plate spaced apart from the diffusion plate by an even predetermined height so as to be mounted at the open lower surface of the shower head body, the spray plate having a plurality of spray holes formed through predetermined positions; and spray plate supporting members connected at their lower ends to the spray plate and connected at their upper ends to a top wall surface of the shower head body for supporting and fixing the spray plate relative to the shower head body.
- FIG. 1 is a sectional view illustrating the structure of a conventional flat panel display manufacturing apparatus
- FIG. 2 is a sectional view illustrating the structure of a flat panel display manufacturing apparatus in accordance with the present invention
- FIG. 3 is a perspective view illustrating the structure of a diffusion plate mounted in a shower head in accordance with the present invention
- FIG. 4 is a sectional view illustrating the structure of a diffusion hole perforated through the diffusion plate shown in FIG. 3 ;
- FIG. 5 is a perspective view illustrating the structure of a spray plate included in the shower head in accordance with the present invention.
- FIG. 6 is a perspective view illustrating the structure of a spray hole plug in accordance with the present invention.
- FIG. 7 is a sectional view of the spray hole plug shown in FIG. 6 ;
- FIG. 8 is a sectional view illustrating the structure of carrier and processing chambers of the flat play display manufacturing apparatus in accordance with the present invention, in the processing chamber being defined imaginary interior space for use in generation of plasma;
- FIG. 9 is a perspective view illustrating the structure of baffles in accordance with the present invention.
- FIG. 10 is an exploded perspective view illustrating the structure of a plasma shielding device in accordance with the present invention.
- FIG. 11 is a sectional view illustrating the shape of engagement surfaces of respective pieces of a horizontal shielding member in accordance with Embodiment 3-1 of the present invention.
- FIG. 12 is a sectional view illustrating the shape of engagement surfaces of respective pieces of a horizontal shielding member in accordance with Embodiment 3-2 of the present invention.
- FIG. 13 is a sectional view illustrating the shape of engagement surfaces of respective pieces of a horizontal shielding member in accordance with Embodiment 3-3 of the present invention.
- FIG. 14 is a sectional view illustrating the shape of engagement surfaces of respective pieces of a horizontal shielding member in accordance with Embodiment 3-4 of the present invention.
- FIG. 15 is a sectional view illustrating the coupling manner of horizontal and vertical shielding members in accordance with Embodiment 3-5 of the present invention.
- FIG. 16 is a sectional view illustrating the coupling manner of horizontal and vertical shielding members in accordance with Embodiment 3-6 of the present invention.
- FIG. 17 is a sectional view illustrating the coupling manner of horizontal and vertical shielding members in accordance with Embodiment 3-7 of the present invention.
- FIG. 18 is a sectional view illustrating the coupling manner of horizontal and vertical shielding members in accordance with Embodiment 3-8 of the present invention.
- FIG. 2 is a sectional view illustrating the structure of a flat panel display manufacturing apparatus in accordance with the present invention.
- the flat panel display manufacturing apparatus comprises a shower head 10 , and in turn, the shower head 10 comprises: a shower head body 12 , a diffusion plate 16 , a spray plate 14 , and spray plate supporting members 18 .
- the shower head body 12 of the shower head 10 is positioned in an upper portion of a chamber of the flat panel display manufacturing apparatus, and defines an interior space having a predetermined volume.
- the shower head body 12 is open at a lower surface thereof, and is fixedly attached at an upper surface thereof to a top wall surface of the chamber.
- a process gas inlet channel 17 for introducing a process gas into the shower head body 12 .
- An outer end of the process gas inlet channel 17 is coupled to an RF current supply device (not shown).
- Such a shower head body 12 is preferably made of an electrically conductive material.
- the diffusion plate 16 is mounted in the shower head body 12 , specifically, in an upper portion of the shower head body 12 , so that it is spaced apart from a top surface of the shower head body 12 by a predetermined distance.
- the process gas is introduced via the process gas inlet channel 17 and is primarily diffused in a space defined by the predetermined distance, and then is secondarily diffused while passing through diffusion holes 16 a of the diffusion plate 16 .
- a plurality of the diffusion holes 16 a perforated through the diffusion plate 16 are uniformly distributed throughout the overall surface of the diffusion plate 16 . This enables even diffusion of the process gas.
- FIG. 4 is a sectional view illustrating the structure of the diffusion hole 16 a formed at the diffusion plate 16 shown in FIG. 3 .
- the diffusion hole 16 a is perforated through the overall thickness of the diffusion plate 16 .
- Such a diffusion hole 16 a is divided into a narrow cylindrical upper portion 16 a 1 , and a conical lower portion 16 a 2 having a downwardly-increasing diameter.
- Such a configuration is effective to achieve even diffusion of the process gas passing through the diffusion hole 16 a . That is, the process gas, passed through the narrow cylindrical upper portion 16 a 1 of the diffusion hole 16 a , can widely spread out while passing through the conical lower portion 16 a 2 .
- the spray plate 14 of the shower head 10 is mounted to seal the open lower surface of the shower head body 12 .
- the spray plate 14 has a plurality of spray holes 14 a , and preferably, hundreds to thousands of the spray holes 14 a are provided in the spray plate 14 .
- each of the spray holes has a diameter in a range of 0.1 mm to 1 mm.
- the spray plate 14 is designed in such a manner that the spray hole 14 a has a relatively large diameter in a range of 3 mm to 8 mm, which is equal to approximately ten times the diameter of the conventional spray hole, enabling easy manufacture thereof.
- FIG. 6 is a perspective view illustrating the structure of the spray hole plug 15 .
- the spray hole plug 15 has an annular holding head 15 a , and a cylindrical body 15 b having a diameter smaller than an outer diameter of the annular holding head 15 a .
- the spray hole plug 15 defines a gas passage therein.
- the gas passage of the spray hole plug 15 takes in the form of a cylinder, and is divided into a relatively wide upper portion 15 c , and a relatively narrow lower portion 15 d .
- the lower portion 15 d of the gas passage has a diameter in a range of 0.1 mm to 1 mm, and is gently rounded at a lower end thereof as shown in FIG. 7 .
- Such a rounding serves to prevent the lower end of the gas passage from being etched by the process gas when the process gas passes through the upper and lower portions 15 c and 15 d of the gas passage. If the lower end of the spray hole plug 15 is etched by the process gas and generates particles as an etching byproduct, the particles may act as contaminants when a predetermined process is performed.
- the spray hole plug 15 is made of an electrically insulative material, such as cerazole or ceramic. This is effective to prevent an arcing phenomenon, which is conventionally generated around the spray holes 14 a , and thus generates no impurities from the spray plate 14 and minimizes damage to the spray plate 14 , thereby lengthening an exchange period of the spray plate 14 . Moreover, even if the spray hole plug 15 is damaged, there is no difficulty in exchanging the spray hole plug 15 since the spray hole plug 15 is easily removable from the spray hole 14 a.
- an electrically insulative material such as cerazole or ceramic.
- the spray plate supporting members 18 are mounted in the shower head body 12 , so that their lower ends penetrate through the spray plate 14 and their upper ends are attached to the top surface of the shower head body 12 . That is, a plurality of the spray plate supporting members 18 are mounted at predetermined central positions of the spray plate 14 , and are adapted to prevent warping at the central region of the spray plate 14 .
- the spray plate supporting members 18 are made of an electrically conductive material. This allows the RF current, supplied from the RF current supply device (not shown), to simultaneously reach the overall surface of the shower head 10 , used as an upper substrate pedestal.
- the RF current mainly flows through the shower head body 12 made of the electrically conductive material. This means that the arrival times of the RF current may be differ from each other at the peripheral region and the central region of the spray plate 14 , thereby preventing the substrate from being evenly processed.
- the RF current is adapted to flow via the spray plate supporting members 18 , thereby reaching the peripheral region and the central region of the spray plate 14 at the same time.
- an insulator member 19 in order to insulate the wall of the chamber with the shower head body 12 , since high-voltage current flows through the shower head body 12 upon receiving the RF current.
- FIG. 8 is a sectional view illustrating the structure of the chamber of the flat play display manufacturing apparatus in accordance with the present invention, in the chamber being defined an imaginary interior space for use in the generation of plasma.
- the chamber of the flat panel display manufacturing apparatus is formed at one side wall thereof with a substrate entrance/exit opening 22 .
- the flat panel display manufacturing apparatus of the present invention further comprises a gate valve 24 provided external to the substrate entrance/exit opening 22 , and a shutter 26 provided internal to the substrate entrance/exit opening 22 .
- the shutter 26 is positioned so that an inner plane thereof coincides with an imaginary plane extending from an inner wall surface of the chamber.
- This serves to provide the chamber with a symmetrical interior space defined by a line 27 shown in FIG. 8 .
- the symmetrical interior space of the chamber is a plasma susceptive region used to generate the plasma. That is, the presence of the shutter 26 allows the inner wall surface of the chamber to be continued across the substrate entrance/exit opening 22 . In order to achieve even processing on the overall surface of the substrate disposed on the substrate pedestal 30 , such a symmetrical plasma susceptive space is essential. Therefore, when a predetermined process is performed in the chamber, the interior of the chamber defines a symmetrical space by means of the shutter 26 .
- the shutter 26 is designed to be opened or closed in a sliding manner.
- both the gate valve 24 and the shutter 26 provided external and internal to the substrate entrance/exit opening 22 , are separately controllable, preferably, the shutter 26 and the gate valve 24 are controlled to cooperate with each other, so as to be simultaneously opened or closed.
- FIG. 9 is a perspective view illustrating the structure of a baffle assembly in accordance with the present invention.
- the flat panel display manufacturing apparatus in accordance with the present embodiment comprises a baffle assembly interposed in a space between the substrate pedestal 30 and the inner lateral wall surface of the chamber.
- the baffle assembly serves as an exhaust passage for downwardly directing the non-reacted gas and polymer generated in the chamber during processing or after process completion. That is, instead of directly flowing downward through the space between the substrate pedestal 30 and the inner lateral wall surface of the chamber, the process gas and plasma are primarily blocked by the baffle assembly, and then flow downward through slits formed at predetermined positions of the baffle assembly.
- the baffle assembly of the present embodiment comprises first baffles 48 installed at the corner regions, and second baffles 44 installed at the remaining region, which take a two-step structure.
- the first and second baffles 48 and 44 have a plurality of slits, respectively.
- the plurality of slits are spaced apart from one another by predetermined distances for allowing passage of the non-reacted gas, etc. That is, instead of directly flowing toward the exhaust units 46 , the flow of the non-reacted gas, etc. is paused momentarily and then is gradually exhausted little by little through the slits.
- the width of the gas passage is narrowed at the edge regions except for the corner regions, resulting in a reduced discharge speed of the process gas.
- the flow rates of the process gas at both the corner and edge regions of the substrate pedestal 30 are adjustable to coincide with each other.
- the first and second baffles 48 and 44 are preferably installed driving units 43 and 45 for vertically moving the first and second baffles 48 and 44 . That is, the heights of the first and second baffles 48 and 44 are automatically adjustable using the driving units 43 and 45 . Therefore, before performing the predetermined process, the first and second baffles 48 and 44 are moved to appropriate positions where the flow rates of the process gas at both the corner and edge regions of the substrate pedestal 30 can coincide with each other in the most effective manner.
- FIG. 10 is an exploded perspective view illustrating the structure of a plasma shielding device in accordance with the present invention.
- the plasma shielding device of the flat panel display manufacturing apparatus comprises a horizontal shielding member 40 which consists of a plurality of pieces surrounding the edge of an upper surface of the substrate pedestal 30 , and a vertical shielding member 50 which consists of a plurality of pieces surrounding the lateral surface of the substrate pedestal 30 as well as an imaginary surface extending downward from the lateral surface.
- the horizontal and vertical shielding members 40 and 50 are coupled so that they come into close contact with each other.
- Such a plasma shielding device is made of a plasma-resistant material, and preferred examples of the plasma-resistant material include ceramic, vespel, or the like.
- the plasma shielding device of the present embodiment is commonly applicable to the shower head 10 and the substrate pedestal 30 .
- the horizontal shielding member 40 installed around the periphery of the substrate pedestal 30 , is positioned higher than the substrate pedestal 30 by a predetermined height considering the thickness of the substrate, disposed on the substrate pedestal 30 to be processed by the plasma. This serves to prevent the lateral surface and rear surface of the substrate located on the substrate pedestal 30 from being attacked by the plasma.
- a preferred spacing height between the horizontal shielding member 40 and the substrate pedestal 30 is approximately 2 mm.
- the horizontal shielding member 40 serves to prevent direct attack by the plasma, generated in a space between the substrate pedestal 30 and the shower head 10 , toward the upper surface of the substrate pedestal 30 .
- the horizontal shielding member 40 is formed by coupling a plurality of first corner pieces 41 and a plurality of first edge pieces 42 .
- the first corner pieces 41 are adapted to surround the corner regions of the substrate pedestal 30
- the first edge pieces 42 are adapted to surround four edges of the substrate pedestal 30 .
- the respective first corner pieces 41 have an “L”-shaped form
- the respective first edge pieces 42 have an elongated rectangular bar form.
- the plurality of first corner and edge pieces 41 and 42 of the horizontal shielding member 40 are coupled to come into close contact with one another.
- preferred embodiments of coupling manners between the first corner piece 41 and the first edge piece 42 or between the first edge pieces 42 will be explained.
- engagement surfaces between the first corner piece 41 and the first edge piece 42 or between the first edge pieces 42 preferably have complementary inclined-line shaped cross sections, respectively, so as to closely engage with one another.
- the plasma mainly generated between the shower head 10 and the substrate pedestal 30 , progress in a straight direction. Therefore, if the engagement surfaces of the respective pieces extend perpendicular to a horizontal direction, the plasma straightly attacks the substrate pedestal 30 along the perpendicular engagement surfaces, increasing the possibility of damage to the substrate pedestal 30 and any other facilities associated with the substrate pedestal 30 .
- the engagement surfaces of the respective pieces of the horizontal shielding member 40 are formed to have the inclined-line shaped cross sections suitable to change the progress route of the plasma from the straight direction to an inclined direction, enabling effective shielding of the plasma.
- the engagement surfaces of the respective pieces of the present embodiment are easy to process, thereby reducing time and costs required to process while enabling effective shielding of the plasma.
- engagement surfaces between the first corner piece 41 and the first edge piece 42 or between the first edge pieces 42 preferably have complementary “V”-shaped cross sections, respectively, so as to closely engage with one another.
- the “V”-shaped cross section is obtained by folding the middle point of the inclined-line shaped engagement surface disclosed in Embodiment 3-1 in order to reduce the possibility of passage of the plasma through the engagement surface.
- a “V”-shaped engagement surface although it requires an increased processing time, it can more surely shield the plasma.
- engagement surfaces between the first corner piece 41 and the first edge piece 42 or between the first edge pieces 42 preferably have complementary toothed line shaped cross sections, respectively, so as to closely engage with one another.
- a protrusion (A) and a recess (B) are formed adjacent to each other.
- engagement surfaces between the first corner piece 41 and the first edge piece 42 or between the first edge pieces 42 preferably have complementary stepped line shaped cross sections, respectively, so as to closely engage with one another.
- the engagement surface is stepped in a thickness direction to have a single step.
- Such a shape of the engagement surface also serves to refract the progress route of the plasma for shielding the plasma.
- the vertical shielding member 50 serves to protect the substrate pedestal 30 and other associated facilities from lateral attack by the plasma. Although the majority of the plasma is generated in the space between the shower head 10 and the substrate pedestal 30 and tends to attack the horizontal shielding member 40 , part of the plasma may escape out of the space between the shower head 10 and the substrate pedestal 30 and laterally attack the substrate pedestal 30 . Therefore, the vertical shielding member 50 serves to shield lateral attack by the plasma to the substrate pedestal 30 , thereby protecting the substrate pedestal 30 and other associated facilities installed below the substrate pedestal 30 from the plasma.
- the vertical shielding member 50 is formed by coupling a plurality of second corner pieces 51 and a plurality of second wall pieces 52 in a close contact state.
- the second corner pieces 51 are adapted to surround corner regions of the substrate pedestal 30
- the second wall pieces 52 are adapted to surround the overall lateral surface of the substrate pedestal 30 as well as the imaginary surface extending downward from the lateral surface.
- the second corner pieces 51 have an “L”-shaped form in the same manner as the first corner pieces 41 .
- the second corner pieces 51 and the second wall pieces 52 are preferably configured in such a manner that engagement surfaces between the second corner piece 51 and the second wall piece 52 or between the second wall pieces 52 preferably have complementary stepped line shaped cross sections, respectively, so as to closely engage with one another. In such a stepped cross section, the engagement surface is stepped in a thickness direction to have a single step.
- the engagement surfaces between the second corner piece 51 and the second wall piece 52 or between the second wall pieces 52 preferably have complementary inclined-line shaped cross sections, respectively, so as to closely engage with one another.
- the engagement surfaces between the second corner piece 51 and the second wall piece 52 or between the second wall pieces 52 preferably have complementary “V”-shaped cross sections, respectively, so as to closely engage with one another.
- the engagement surfaces between the second corner piece 51 and the second wall piece 52 or between the second wall pieces 52 preferably have complementary toothed line shaped cross sections, respectively, so as to closely engage with one another.
- a protrusion (A) and a recess (B) are formed adjacent to each other.
- the plasma shielding device of the present invention as stated above is completed by coupling the horizontal shielding member 40 with the vertical shielding member 50 so as to come into close contact with each other. That is, in the case of the horizontal shielding member 40 , although it can effectively shield vertical attack by the plasma, it has a disadvantage in that it cannot shield lateral attack by the plasma. Contrary, in the case of the vertical shielding member 50 , although it can effectively shield lateral attack by the plasma, it has a disadvantage in that it cannot shield vertical attack by the plasma. Therefore, only in a state wherein an outer circumferential end (C) of the horizontal shielding member 40 and an upper end (D) of the vertical shielding member 50 are coupled to come into close contact with each other, the plasma shielding device can shield attack by the plasma in all directions.
- the outer circumferential end (C) of the horizontal shielding member 40 is a circumferential end facing the inner lateral wall surface of the chamber rather than to come into contact with the substrate pedestal 30
- the upper end (D) of the vertical shielding member 50 is a portion in contact with the horizontal shielding member 40 .
- the horizontal shielding member 40 is configured so that the outer circumferential end (C) thereof protrudes outward beyond a circumferential end of the substrate pedestal 30 by a predetermined length
- the vertical shielding member 50 is configured so that the upper end (D) thereof is stepped to be closely coupled with both lateral and lower surfaces of the protruded portion of the horizontal shielding member 40 .
- the outer circumferential end (C) of the horizontal shielding member 40 and the upper end (D) of the vertical shielding member 50 can be coupled to come into close contact with each other.
- attack by the plasma in a lateral direction of the horizontal shielding member 40 can be shield by the upper end (D) of the vertical shielding member 50
- attack by the plasma in a vertical direction of the vertical shielding member 50 can be shield by the outer circumferential end (C) of the horizontal shielding member 40 , resulting in total plasma shielding in all directions.
- the vertical shielding member 50 is configured so that the upper end (D) thereof protrudes upward beyond a horizontal plane of a stepped region of the substrate pedestal 30 by a predetermined height
- the horizontal shielding member 40 is configured so that the outer circumferential end (C) thereof is stepped to be closely coupled with both lateral and upper surfaces of the protruded portion of the vertical shielding member 50 .
- the outer circumferential end (C) of the horizontal shielding member 40 and the upper end (D) of the vertical shielding member 50 can be preferably coupled to come into close contact with each other.
- the horizontal and vertical shielding members 40 and 50 can complement each other, enabling total plasma shielding in all directions.
- the vertical shielding member 50 is configured so that the upper end (D) thereof protrudes beyond the horizontal plane of the stepped region of the substrate pedestal 30 by the same height as the thickness of the horizontal shielding member 40 and a predetermined part of the protruded portion is stepped.
- the horizontal shielding member 40 is configured so that it can be inserted in the stepped region of the substrate pedestal 30 and the outer circumferential end (C) thereof is stepped so as to be closely coupled with the stepped portion of the vertical shielding member 50 .
- the outer circumferential end (C) of the horizontal shielding member 40 and the upper end (D) of the vertical shielding member 50 can be preferably coupled to come into close contact with each other.
- the present embodiment allows the progress route of the plasma to be repeatedly refracted, entirely eliminating the possibility of attack by the plasma and resulting in enhanced plasma shielding efficiency.
- the horizontal shielding member 40 is configured so that the outer circumferential end (C) thereof protrudes outward from the circumferential end of the stepped region of the substrate pedestal 30 by a predetermined length, and a predetermined part of the protruded portion is stepped by a predetermined thickness
- the vertical shielding member 50 is configured so that the it is coupled to the lateral surface of the substrate pedestal 30 and the upper end (D) thereof is stepped so as to be coupled with the stepped portion formed at the outer circumferential end (C) of the horizontal shielding member 40 .
- the outer circumferential end (C) of the horizontal shielding member 40 and the upper end (D) of the vertical shielding member 50 can be preferably coupled to come into close contact with each other.
- the present embodiment also repeatedly refracts the progress route of the plasma, improving shielding efficiency of the plasma.
- Embodiments (3-6 and 3-8) the progress route of the plasma defined in the coupling surfaces of the horizontal and vertical shielding members 40 and 50 extend in a lateral direction, rather than to extend toward the space between the shower head 10 and the substrate pedestal 30 , in which the majority of the plasma is generated. This has the effect of reducing the possibility of attack by the plasma as compared to Embodiments (3-5 and 3-7).
- Embodiments (3-6 and 3-8) are preferred over Embodiments (3-5 and 3-7).
- the present invention provides a flat panel display manufacturing apparatus having a shower head, which has a simplified structure wherein a single diffusion plate is employed, and thus is easy to manufacture.
- the shower head of the flat panel display manufacturing apparatus further comprises a spray plate which is easy to manufacture and can eliminate the occurrence of an arcing phenomenon caused by plasma, thereby solving any problems due to frequent exchange and difficulties in manufacture of the spray plate.
- spray plate supporting members at the center of the spray plate is mounted spray plate supporting members, so as to prevent warping at the center of the spray plate and to conduct even distribution of the plasma.
- a processing chamber thereof inside a processing chamber thereof is defined a perfect symmetrical space when a predetermined process is performed on a substrate disposed on a substrate pedestal mounted in the chamber, enabling even processing on the overall surface of the substrate.
- the flat panel display manufacturing apparatus of the present invention comprises a stepped baffle assembly wherein baffles associated with exhaust units are positioned at a different level from the other baffles.
- a stepped baffle assembly can equalize flow rate of a process gas throughout the interior of the processing chamber, enabling even processing of the substrate.
- the heights of the baffles are automatically adjustable with the result that the baffles can be positioned to achieve the constant flow rate of the process gas inside the processing chamber.
- the flat panel display manufacturing apparatus further comprises a plasma shielding device.
- the plasma shielding device is formed by assembling a plurality of pieces, enabling processing of the latest large-scale substrates.
- the plurality of pieces have engagement surfaces which are easy to process, thereby being capable of reducing time and costs required to process the plasma shielding device.
- Such a plasma shielding device comprises a horizontal shielding member and a vertical shielding member, which are closely coupled to each other. Consequently, the plasma shielding device is easy to process and can shield total plasma in all directions.
- the plasma shielding device is formed using the plurality of pieces, the plasma shielding device is free from damage due to a difference in thermal expansion rates between the plasma shielding device and the substrate pedestal.
- the substrate pedestal is made of aluminum having a high thermal expansion coefficient
- the plasma shielding device is made of ceramic showing substantially no thermal expansion. Therefore, if the plasma shielding device and the substrate pedestal are repeatedly processed at high and low temperatures using the plasma in a state wherein the plasma shielding device is closely coupled around the substrate pedestal, there exists the possibility of damaging the plasma shielding device due to the different thermal expansion rates.
- the plurality of pieces of the plasma shielding device can be spaced apart from one another to some extent.
- the plasma shielding device of the present invention furthermore, even if any one of the pieces is damaged, it can be easily repaired through simple exchange of the damaged piece.
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US12/246,563 US8273211B2 (en) | 2003-11-14 | 2008-10-07 | Flat panel display manufacturing apparatus |
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KR10-2003-0080412A KR100503388B1 (ko) | 2003-11-14 | 2003-11-14 | 균일한 플라즈마를 형성하는 평판표시소자 제조장치의공정챔버 |
KR2003-80406 | 2003-11-14 | ||
KR2003-80412 | 2003-11-14 | ||
KR10-2003-0080406A KR100495711B1 (ko) | 2003-11-14 | 2003-11-14 | 샤워헤드가 구비되는 평판표시소자 제조장치의 공정챔버 |
KR1020030089112A KR100552246B1 (ko) | 2003-12-09 | 2003-12-09 | 플라즈마 차폐 장치 |
KR2003-89112 | 2003-12-09 |
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US10/983,832 Abandoned US20050103267A1 (en) | 2003-11-14 | 2004-11-08 | Flat panel display manufacturing apparatus |
US12/246,563 Expired - Fee Related US8273211B2 (en) | 2003-11-14 | 2008-10-07 | Flat panel display manufacturing apparatus |
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Cited By (94)
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US20060048709A1 (en) * | 2004-09-08 | 2006-03-09 | Advanced Display Process Engineering Co., Ltd. | Plasma processing apparatus |
US20060219362A1 (en) * | 2005-04-01 | 2006-10-05 | Geun-Jo Han | Gas injector and apparatus including the same |
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US20090025877A1 (en) | 2009-01-29 |
CN1617309A (zh) | 2005-05-18 |
TW200516664A (en) | 2005-05-16 |
CN1329962C (zh) | 2007-08-01 |
TWI255505B (en) | 2006-05-21 |
US8273211B2 (en) | 2012-09-25 |
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