US20120175279A1 - Euv pod with fastening structure - Google Patents
Euv pod with fastening structure Download PDFInfo
- Publication number
- US20120175279A1 US20120175279A1 US13/094,911 US201113094911A US2012175279A1 US 20120175279 A1 US20120175279 A1 US 20120175279A1 US 201113094911 A US201113094911 A US 201113094911A US 2012175279 A1 US2012175279 A1 US 2012175279A1
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- United States
- Prior art keywords
- inner container
- container
- upper cover
- disposed
- reticle
- Prior art date
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- 238000006731 degradation reaction Methods 0.000 description 1
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- 238000001900 extreme ultraviolet lithography Methods 0.000 description 1
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Images
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F1/00—Originals for photomechanical production of textured or patterned surfaces, e.g., masks, photo-masks, reticles; Mask blanks or pellicles therefor; Containers specially adapted therefor; Preparation thereof
- G03F1/66—Containers specially adapted for masks, mask blanks or pellicles; Preparation thereof
-
- 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
- H01L21/677—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 conveying, e.g. between different workstations
- H01L21/67763—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 conveying, e.g. between different workstations the wafers being stored in a carrier, involving loading and unloading
- H01L21/67772—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 conveying, e.g. between different workstations the wafers being stored in a carrier, involving loading and unloading involving removal of lid, door, cover
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/70691—Handling of masks or workpieces
- G03F7/70733—Handling masks and workpieces, e.g. exchange of workpiece or mask, transport of workpiece or mask
- G03F7/70741—Handling masks outside exposure position, e.g. reticle libraries
-
- 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
- H01L21/673—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 using specially adapted carriers or holders; Fixing the workpieces on such carriers or holders
- H01L21/6735—Closed carriers
- H01L21/67379—Closed carriers characterised by coupling elements, kinematic members, handles or elements to be externally gripped
Definitions
- the present invention is related to a reticle pod, and more particularly, to an EUV pod with fastening structure.
- optical lithography tool plays an important role.
- the pattern definition relies fully on optical lithography technology.
- pre-designed circuit paths are fabricated as light-transparent reticle in specific form. Basing on the principle of exposure, after light from the light source passes through the reticle and is projected on a silicon wafer, specific circuit pattern can be exposed on the silicon wafer.
- any kind of dust such as particles, powders, and organic matters
- the reticle used to produce pattern on silicon wafers is required to be kept absolutely clean. Therefore, a cleanroom environment is usually provided in ordinary wafer fabrication processes to prevent from contamination caused by particles in the air.
- EUV extreme ultraviolet light
- lithography tool for the pattern on reticle to be imaged with higher resolution when being projected on the surface of a silicon wafer.
- Particles smaller than 30 ⁇ m are previously acceptable, but as far as reticle pods for use with EUV lithography techniques are concerned, only particles with sizes between 30 and 50 nm are acceptable.
- anti-contamination reticle pods are used in modern semiconductor process to store and carry reticles and to maintain the cleanliness of reticles; on the other hand, anti-contamination storage containers for semiconductor components are also used for storing and carrying semiconductor components and also for maintaining the cleanliness of semiconductor components.
- Reticle pods are used in the semiconductor process for storing reticles and for facilitating the carrying and transporting of reticles between platforms in order to isolate reticles from the air and thus prevent haze from forming on the surface of reticles due to contamination of reticles caused by particles and chemical gas.
- the cleanliness of reticle pods or storage devices for semiconductor components is usually required to comply with the SMIF (Standard Mechanical Interface) standard, in other words, to be maintained at Class 1 or below.
- SMIF Standard Mechanical Interface
- the present invention provides a reticle pod in which supporters of the outer container are used to press retainers of the inner container and thus indirectly fasten the reticle inside for ensuring safety and stability of the reticle in the reticle pod.
- one primary object of the present invention is to provide a reticle pod, in which supporters disposed on the outer container are used to press retainers of the inner container for indirectly fastening reticle inside the pod and thus ensuring the safety and stability of the reticle inside.
- Another primary object of the present invention is to provide a reticle pod, in which supporters disposed on the outer container are used to press retainers of the inner container for preventing the inner container from shifting and further ensuring the safety of the reticle inside the inner container.
- the present invention provides a reticle pod, in which a reticle is fastened in an inner container and the inner container is placed in an outer container;
- the outer container comprises: a lower cover of outer container having a first inner surface on which a plurality of first supporters are formed, and an upper cover of outer container having a second inner surface on which a plurality of second supporters are formed, a first accommodation space being formed by the first inner surface and the second inner surface for accommodating the inner container when the lower cover and the upper cover of the outer container are joined together;
- the inner container comprises: a lower cover of inner container placed in the first accommodation space and in contact with the plurality of first supporters, the lower cover of inner container having a first inner surface of inner container, and an upper cover of inner container placed in the first accommodation space, the upper cover of inner container having a second inner surface of inner container and an outer surface of upper cover of inner container on the opposite side of the second inner surface of inner container, a second accommodation space being formed by the first inner surface of inner container and the second inner surface of inner container
- the reticle can be stably fastened in the inner container of the reticle pod and the inner container can also be fastened.
- the effect of fastening both the reticle and the inner container is thus achieved. Therefore, not only the risks of collisions of reticle in the pod due to vacillation of reticle pod during transportation can be reduced, but the cost incurred by cracks and damages of reticles can also be greatly decreased.
- Still another primary object of the present invention is to provide a reticle pod, in which the window disposed on the inner container of the reticle pod is used for monitoring the condition of the interior of the inner container.
- the present invention provides a reticle pod, in which a reticle is fastened in an inner container and the inner container is placed in an outer container;
- the outer container comprises: a lower cover of outer container having a first inner surface on which a plurality of first supporters are formed, and an upper cover of outer container having a second inner surface on which a plurality of second supporters are formed, a first accommodation space being formed by the first inner surface and the second inner surface for accommodating the inner container when the lower cover and the upper cover of the outer container are joined together;
- the inner container comprises: a lower cover of inner container placed in the first accommodation space and in contact with the plurality of first supporters, the lower cover of inner container having a first inner surface of inner container, and an upper cover of inner container placed in the first accommodation space, the upper cover of inner container having a second inner surface of inner container and an outer surface of upper cover of inner container on the opposite side of the second inner surface of inner container, a second accommodation space being formed by the first inner surface of inner container and the second inner surface of
- the reticle inside can be monitored through the window from the platform for ensuring that the reticle inside is correctly positioned and thus preventing cracks of reticles from occurring during the process of transferring.
- FIG. 1 is an explosive view of the reticle pod of the present invention
- FIG. 2 is a view of the retainer of the upper cover of inner container of the present invention
- FIG. 3 is a view of the filter device of the upper cover of inner container of the present invention.
- FIG. 4 is a view of the foolproof structure of the upper cover of inner container of the present invention.
- FIG. 5 is a view of the limiter of the lower cover of inner container of the present invention.
- FIG. 6 is a view of the window of the lower cover of inner container of the present invention.
- FIG. 7 is a sectional view of the reticle pod of the present invention.
- FIG. 8 is a view of the reticle pod of the prior art.
- the present invention discloses a reticle pod, and more particularly, a reticle pod with fastening/retaining structure; the inner container, outer container, and the filtering material employed in the embodiments of reticle pod of the present invention are achieved by using current technologies and the description of which is thus omitted.
- the drawings referred to in the following description are not made according to the actual scale and only function as illustrations demonstrating characteristics of the present inventions.
- the reticle pod comprises an outer container 1 and an inner container 2 , wherein the outer container 1 comprises a lower cover of outer container 10 having a first inner surface 101 on which a plurality of first supporters 30 are formed, and an upper cover of outer container 12 having a second inner surface 121 on which a plurality of protruding second supporters 32 are formed, a first accommodation space 100 being formed between the first inner surface 101 and the second inner surface 121 for accommodating and fastening the inner container 2 when the lower cover of outer container 10 and the upper cover of outer container 12 are joined together; the inner container 2 comprises a lower cover of inner container 20 , which is placed in the first accommodation space 100 and in contact with the plurality of first supporters 30 and has a first inner surface of inner container 201 , and an upper cover of inner container 22 , which is placed in the first accommodation space 100 and has a second inner surface of inner container 221 and an outer surface of
- four sides of the lower cover of outer container 10 are disposed with a plurality of drain holes 105 , which are shown as round holes in FIG. 1 ; and a pair of lock holes 103 , which are shown as rectangular holes in FIG. 1 , are further disposed on two opposite sides among four sides of the lower cover of outer container 10 .
- a latch not shown in Figure
- An objective of disposing a plurality of drain holes 105 is as thus: after the lower cover of outer container 10 of the reticle pod of the present invention is cleaned with water, water molecules remaining in the lower cover of outer container 10 can be drained out through the plurality of drain holes 105 after heating and baking processes are performed, and the rate of reticle contamination caused by the reticle pod can therefore be decreased.
- FIG. 2 is a view of the retainer of the upper cover of inner container of the present invention.
- a plurality of through holes 225 are disposed between the second inner surface 221 and the outer surface of upper cover 223 of the upper cover 22 of the inner container of the reticle pod; in addition, an O-shaped recess 2251 is formed as surrounding each of the through holes 225 and is disposed with a spring element 42 .
- a retainer 40 is disposed in each of the through holes 225 .
- the retainer 40 is formed by a supporting convex pillar 401 with a size fitting for being inserted into a through hole 225 and an O-shaped protruding portion 403 correspondingly disposed in the O-shaped recess 2251 ; the supporting convex pillar 401 and the O-shaped protruding portion 403 are an integrated structure; wherein, the supporting convex pillar 401 is inserted into the through hole 225 , and the O-shaped protruding portion 403 is in the O-shaped recess 2251 and the protruding portion 4031 of the O-shaped protruding portion 403 is in contact with the spring element 42 ; apparently, the length of the supporting convex pillar 401 of the retainer 40 is larger than that of the protruding portion 4031 of the O-shaped protruding portion 403 .
- each retainer 40 corresponds to each second supporter 32 of the upper cover of outer container 12 . Furthermore, on a side of each retainer 40 on the outer surface of upper cover of inner container 223 of the upper cover of inner container 22 , a first fastener 44 that fastens the retainer 40 is respectively disposed, the first fastener 44 having a hole 441 with a size smaller than the retainer 40 so that part of the surface of the retainer 40 can be exposed; therefore, with the O-shaped recess 2251 and the first fastener 44 being joined together, the retainer 40 can be fastened and prevented from dropping down.
- the first fastener 44 of the present invention is lock-fastened to the inner container 2 for storing the reticle with a screw and can also be disposed in the inner container 2 for storing the reticle either via being snap-fitted or adhered to the inner container 2 , the way of which is not limited in the present invention.
- the material of retainer 40 is a wear-resistant polymer material so that friction that may generate particles and dusts which contaminate the reticle 9 in the inner container 2 can be prevented.
- FIG. 3 is a view of filter device of the upper cover of inner container of the present invention.
- a plurality of filtration holes 227 penetrating the upper cover of inner container 22 are disposed, and a filter material 50 is disposed on each of the filtration holes 227 .
- the filter material 50 of the present invention can be a porous filter membrane and can be selected from the group consisting of: glass-fiber filter, static electricity filter, electrically conductive filter membrane, PTFE filter, and porous ceramic material, which is not limited in the present invention.
- a second retainer 52 can be further disposed on the filtration hole 227 to reinforce the fastening; the second retainer 52 can be lock-fastened to the inner container 2 via a screw or in other ways, the way of lock-fastening the second retainer 52 is not limited in the present invention.
- two filtration holes form a set and the upper cover of inner container 22 is disposed with two sets of filtration holes 227 , and yet the actual number of filtration holes 227 disposed is not limited in the present invention.
- FIG. 4 is a view of foolproof structure of the upper cover of inner container of the present invention.
- an integrated foolproof structure 60 is respectively formed on four corners formed on the periphery 222 of the upper cover of inner container 22 .
- the characteristic is in that a portion of the foolproof structure 60 of the present invention will protrude from the periphery 222 of the upper cover of inner container 22 , and thus, when the upper cover of inner container 22 and the lower cover of inner container 20 are joined together, the protruding portion of the foolproof structure 60 will be snap-fitted on the periphery 22 of the lower cover of inner container 20 ; since the foolproof structure 60 is respectively formed on the four corners, when the inner container 2 is closed, the upper cover 22 and the lower cover 20 are successfully joined only when all the foolproof structures 60 on four corners are snap-fitted, the foolproof effect being thus achieved. Moreover, as the length and the width of the inner container 2 are not the same, the length-to-width ratio can also be taken into consideration when the inner container 2 is closed for determining whether the closing of inner container 2 is correctly performed.
- FIG. 5 is a view of the limiter of lower cover of inner container of the present invention.
- each of the four corners of the first inner surface of inner container 201 of the lower cover of inner container 20 has a recess 204 , in which a limiter 70 is respectively disposed;
- the limiter 70 is a horizontal bar-shaped substrate 701 with two convex columns 703 disposed on two sides, and a bevel 704 is respectively formed at the open end of each of the convex columns 703 ;
- a supporting protruding point 705 is further disposed between the two convex columns 703 of the horizontal bar-shaped substrate 701 , and the supporting protruding point 705 and the two convex columns 703 are disposed on a straight line.
- the top surface of the horizontal bar-shaped substrate 701 of the limiter 70 and the first inner surface of inner container 201 will be on the same horizontal level.
- the reticle 9 When the reticle 9 is to be placed onto the first inner surface of inner container 201 , if the reticle 9 shifts its position, the reticle 9 can be guided to the correct position by the bevels 704 of the convex columns 703 and each of the four corners of the reticle 9 is in contact with the supporting protruding point 705 on the horizontal bar-shaped substrate 701 ; the reticle 9 is thus placed onto the first inner surface of inner container 201 .
- each limiter 70 of the present invention can be alternatively disposed on the point of intersection at 146 mm on each side of the first inner surface 201 of the inner container 20 ; therefore, the position of each limiter 70 on the first inner surface 201 is not limited in the present invention as long as the position of each limiter 70 is on or beyond the point of intersection at 146 mm on each side of the first inner surface 201 , such design ensuring that the supporting protruding point 705 of each limiter 70 is only in contact with the edge of the reticle and does not cause wear of or damage to pattern on the reticle.
- FIG. 6 is a view of the window of the lower cover of inner container of the present invention.
- a plurality of windows 205 are disposed on the outer surface of lower cover of inner container 203 which is on the opposite side of the first inner surface of inner container 201 of the lower cover of inner container 20 , and a transparent substrate 80 made of transparent glass, transparent plastic material, or other materials is respectively disposed in each of the windows 205 ; on the transparent substrate 80 , a third fastener 82 is further disposed for snap-fitting the transparent substrate 80 to the window 205 and prevent the transparent substrate 80 from dropping down.
- the third fastener 82 is a frame-shaped member with a size fitting to the window, and thus the reticle inside can be monitored from outside the lower cover of inner container 20 via the window 205 . Therefore, during the process, there will be signals from platforms to inspect the process and function of a reticle via the window 205 .
- a ring-shaped pad 84 is disposed between the transparent substrate 80 and the third fastener 82 and is made of polymer material such as PTFE; the primary objective of disposing the ring-shaped pad 84 is to isolate and thus prevent the transparent substrate 80 from contacting the third fastener 82 so that proper flexibility is allowed to protect the transparent substrate 80 from being damaged.
- the third fastener 82 is disposed on the lower cover of inner container 20 , the third fastener 82 and the outer surface of lower cover of inner container 203 are at the same horizontal level, and thus the placement of the inner container 2 in the outer container 2 will not be hindered.
- the third fastener 82 of the present invention is lock-fastened onto the outer surface of lower cover of inner container 203 of lower cover of inner container 20 via a screw, and the way of lock-fastening is not limited in the present invention.
- FIG. 7 is a sectional view of the reticle pod of the present invention.
- the reticle 9 is first placed on the lower cover of inner container 20 of the inner container 2 , and, as described above, the four corners of the lower surface 91 of the reticle 9 will be first placed on the supporting protruding points 705 of the limiters 70 disposed on the four corners of the first inner surface of inner container 201 .
- the two columns 703 on two sides of each supporting protruding point 705 will be located right on the periphery 95 of the reticle 9 (namely, two sides of the right-angle corner).
- each convex column 703 the two sides of each of the four right-angle corners of the reticle 9 will be respectively clamped by each convex column 703 and the reticle 9 can be prevented from shifting.
- the upper cover of inner container 22 is joined with the lower cover of inner container 20 in the designated direction and an inner container 2 for protecting the reticle 9 is thus formed.
- the inner container 2 is placed onto the plurality of first supporters 30 of the lower cover of outer container 10 of the outer container 1 ; wherein, the first supporters 30 correspond to the positioning groove 207 of the outer surface of lower cover of inner container 203 of the lower cover of inner container 20 (referring to FIG. 6 ), and therefore, the inner container 2 is guided by the positioning groove 207 to the correct position when being placed.
- the upper cover of outer container 12 is then closed; wherein, when the upper cover of outer container 12 is to be closed, each of the second supporters 32 on the upper cover of outer container 12 aligns with the retainer 40 in each of the through holes 225 of the upper cover of inner container 22 .
- each second supporter 32 is driven by the closing action to exert a downward force and impose pressure on the exposed portion of the retainer 40 in the through hole 225 ; when the retainer 40 is pressed, the O-shaped protruding portion 403 will then impose pressure on the O-shaped spring element 42 in the O-shaped recess 2251 , and the retainer 40 will then press further down and inward (i.e.
- the supporting convex pillars 401 integrated with the O-shaped protruding portions 403 will also be pressed down and inward and will then be in contact with four corners of the upper surface 93 of the reticle 9 , in other words, when the upper cover of outer container 12 is closed, the supporting convex pillars 401 of the retainers 40 at four corners of the reticle 9 will press the four corners of the upper surface 93 of the reticle 9 , and therefore the reticle 9 can be stably fastened in the inner container 2 with the existent support from the supporting protruding points 705 of the four corners of the lower surface 91 of the reticle 9 ; the inner container 2 can also be stabilized with the second supporters 32 of the upper cover of outer container 12 pressing inward, and the security of the
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- Condensed Matter Physics & Semiconductors (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
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Abstract
Description
- This application claims priority to Taiwan Patent Application No. 100101022, filed Jan. 11, 2011, the contents of which are hereby incorporated by reference in their entirety.
- 1. Field of the Invention
- The present invention is related to a reticle pod, and more particularly, to an EUV pod with fastening structure.
- 2. Description of the Prior Art
- In the rapidly developing modern semiconductor technology, optical lithography tool plays an important role. The pattern definition relies fully on optical lithography technology. In the application of optical lithography tool related to semiconductors, pre-designed circuit paths are fabricated as light-transparent reticle in specific form. Basing on the principle of exposure, after light from the light source passes through the reticle and is projected on a silicon wafer, specific circuit pattern can be exposed on the silicon wafer. However, since any kind of dust (such as particles, powders, and organic matters) that adhere to the reticle can result in quality degradation of projected pattern, the reticle used to produce pattern on silicon wafers is required to be kept absolutely clean. Therefore, a cleanroom environment is usually provided in ordinary wafer fabrication processes to prevent from contamination caused by particles in the air.
- In recent years, in order to further scale down the chip feature sizes, EUV (extreme ultraviolet light) at a wavelength of 157 nm is applied in lithography tool for the pattern on reticle to be imaged with higher resolution when being projected on the surface of a silicon wafer. However, when EUV is applied, the requirements for cleanliness of reticle pod are also, relatively speaking, higher. Particles smaller than 30 μm are previously acceptable, but as far as reticle pods for use with EUV lithography techniques are concerned, only particles with sizes between 30 and 50 nm are acceptable.
- As a result, anti-contamination reticle pods are used in modern semiconductor process to store and carry reticles and to maintain the cleanliness of reticles; on the other hand, anti-contamination storage containers for semiconductor components are also used for storing and carrying semiconductor components and also for maintaining the cleanliness of semiconductor components. Reticle pods are used in the semiconductor process for storing reticles and for facilitating the carrying and transporting of reticles between platforms in order to isolate reticles from the air and thus prevent haze from forming on the surface of reticles due to contamination of reticles caused by particles and chemical gas. Thus, in advanced semiconductor plants, the cleanliness of reticle pods or storage devices for semiconductor components is usually required to comply with the SMIF (Standard Mechanical Interface) standard, in other words, to be maintained at
Class 1 or below. - In order to reduce contamination generated during the process of storing, manufacturing, and transporting, a technology that uses a double-layer container for isolating the reticle has been proposed in the prior art, wherein an inner container is used for carrying the reticle and an outer container is used for fastening the inner container therein. As shown in
FIG. 8 , the lower cover c and the upper cover d of an inner container cover the reticle e and fasten the reticle e within the inner container, and then the lower cover a and the upper cover b of an outer container cover the inner container and fasten the inner container within the outer container. In the double-layer pod structure, supporters disposed in an outer container are usually used for fastening the inner container. However, in such double-layer pod structure, the user is unable to determine whether the inner container is stably snap-fastened by the supporters of the outer container and is unable to make sure the positioning status of the reticle in the inner container either. In consideration of the aforementioned, the present invention provides a reticle pod in which supporters of the outer container are used to press retainers of the inner container and thus indirectly fasten the reticle inside for ensuring safety and stability of the reticle in the reticle pod. - In order to solve the above-mentioned problem, one primary object of the present invention is to provide a reticle pod, in which supporters disposed on the outer container are used to press retainers of the inner container for indirectly fastening reticle inside the pod and thus ensuring the safety and stability of the reticle inside.
- Another primary object of the present invention is to provide a reticle pod, in which supporters disposed on the outer container are used to press retainers of the inner container for preventing the inner container from shifting and further ensuring the safety of the reticle inside the inner container.
- According to the objectives above, the present invention provides a reticle pod, in which a reticle is fastened in an inner container and the inner container is placed in an outer container; the outer container comprises: a lower cover of outer container having a first inner surface on which a plurality of first supporters are formed, and an upper cover of outer container having a second inner surface on which a plurality of second supporters are formed, a first accommodation space being formed by the first inner surface and the second inner surface for accommodating the inner container when the lower cover and the upper cover of the outer container are joined together; the inner container comprises: a lower cover of inner container placed in the first accommodation space and in contact with the plurality of first supporters, the lower cover of inner container having a first inner surface of inner container, and an upper cover of inner container placed in the first accommodation space, the upper cover of inner container having a second inner surface of inner container and an outer surface of upper cover of inner container on the opposite side of the second inner surface of inner container, a second accommodation space being formed by the first inner surface of inner container and the second inner surface of inner container for accommodating the reticle when the lower cover of the inner container and the upper cover of the inner container are joined together; wherein, the characteristic of the upper cover of inner container is in that: a plurality of through holes are formed between the second inner surface and the outer surface of the upper cover of inner container, and an O-shaped recess is formed around each of the through holes to surround each of the through holes, a spring element being formed in each of the O-shaped recesses; a plurality of retainers are disposed in each of the through holes and their positions correspond to each of the second supporters of the upper cover of outer container, each retainer being formed by a supporting convex pillar and an corresponding O-shaped protruding portion disposed in O-shaped recess, the length of supporting convex pillar being larger than the length of O-shaped protruding portion and the supporting convex pillar and the O-shaped protruding portion are an integrated structure, wherein each O-shaped protruding portion is in an O-shaped recess and in contact with a spring element.
- By utilizing the design provided by the present invention, the reticle can be stably fastened in the inner container of the reticle pod and the inner container can also be fastened. The effect of fastening both the reticle and the inner container is thus achieved. Therefore, not only the risks of collisions of reticle in the pod due to vacillation of reticle pod during transportation can be reduced, but the cost incurred by cracks and damages of reticles can also be greatly decreased.
- Still another primary object of the present invention is to provide a reticle pod, in which the window disposed on the inner container of the reticle pod is used for monitoring the condition of the interior of the inner container.
- Therefore, according to the object above, the present invention provides a reticle pod, in which a reticle is fastened in an inner container and the inner container is placed in an outer container; the outer container comprises: a lower cover of outer container having a first inner surface on which a plurality of first supporters are formed, and an upper cover of outer container having a second inner surface on which a plurality of second supporters are formed, a first accommodation space being formed by the first inner surface and the second inner surface for accommodating the inner container when the lower cover and the upper cover of the outer container are joined together; the inner container comprises: a lower cover of inner container placed in the first accommodation space and in contact with the plurality of first supporters, the lower cover of inner container having a first inner surface of inner container, and an upper cover of inner container placed in the first accommodation space, the upper cover of inner container having a second inner surface of inner container and an outer surface of upper cover of inner container on the opposite side of the second inner surface of inner container, a second accommodation space being formed by the first inner surface of inner container and the second inner surface of inner container for accommodating the reticle when the lower cover of the inner container and the upper cover of the inner container are joined together; wherein, the lower cover of inner container is further disposed with a plurality of windows, each of the windows comprising: a transparent substrate, which is disposed on the window via the first inner surface of inner container, and a third retainer, which is a frame-shaped member with its size fitting the window and is disposed on the window and the transparent substrate via the first inner surface of inner container for fastening the transparent substrate.
- By using the design provided by the present invention, when the inner container storing a reticle is introduced into the manufacturing process, the reticle inside can be monitored through the window from the platform for ensuring that the reticle inside is correctly positioned and thus preventing cracks of reticles from occurring during the process of transferring.
-
FIG. 1 is an explosive view of the reticle pod of the present invention; -
FIG. 2 is a view of the retainer of the upper cover of inner container of the present invention; -
FIG. 3 is a view of the filter device of the upper cover of inner container of the present invention; -
FIG. 4 is a view of the foolproof structure of the upper cover of inner container of the present invention; -
FIG. 5 is a view of the limiter of the lower cover of inner container of the present invention; -
FIG. 6 is a view of the window of the lower cover of inner container of the present invention; -
FIG. 7 is a sectional view of the reticle pod of the present invention; -
FIG. 8 is a view of the reticle pod of the prior art. - As the present invention discloses a reticle pod, and more particularly, a reticle pod with fastening/retaining structure; the inner container, outer container, and the filtering material employed in the embodiments of reticle pod of the present invention are achieved by using current technologies and the description of which is thus omitted. Moreover, the drawings referred to in the following description are not made according to the actual scale and only function as illustrations demonstrating characteristics of the present inventions.
- First, referring to
FIG. 1 , which is an explosive view of the reticle pod of the present invention. As shown inFIG. 1 , the reticle pod comprises anouter container 1 and aninner container 2, wherein theouter container 1 comprises a lower cover ofouter container 10 having a firstinner surface 101 on which a plurality offirst supporters 30 are formed, and an upper cover ofouter container 12 having a secondinner surface 121 on which a plurality of protrudingsecond supporters 32 are formed, afirst accommodation space 100 being formed between the firstinner surface 101 and the secondinner surface 121 for accommodating and fastening theinner container 2 when the lower cover ofouter container 10 and the upper cover ofouter container 12 are joined together; theinner container 2 comprises a lower cover ofinner container 20, which is placed in thefirst accommodation space 100 and in contact with the plurality offirst supporters 30 and has a first inner surface ofinner container 201, and an upper cover ofinner container 22, which is placed in thefirst accommodation space 100 and has a second inner surface ofinner container 221 and an outer surface of upper cover ofinner container 223 which is on the opposite side of the second inner surface ofinner container 221, asecond accommodation space 200 being formed between the first inner surface ofinner container 201 and the second inner surface ofinner container 221 for accommodating areticle 9 when the lower cover ofinner container 20 and the upper cover ofinner container 22 are joined together. - Furthermore, four sides of the lower cover of
outer container 10 are disposed with a plurality ofdrain holes 105, which are shown as round holes inFIG. 1 ; and a pair oflock holes 103, which are shown as rectangular holes inFIG. 1 , are further disposed on two opposite sides among four sides of the lower cover ofouter container 10. Apparently, as the lower cover ofouter container 10 is disposed with a latch (not shown in Figure), when the latch is turned to close the outer container, the latch projects into thelock holes 103. An objective of disposing a plurality ofdrain holes 105 is as thus: after the lower cover ofouter container 10 of the reticle pod of the present invention is cleaned with water, water molecules remaining in the lower cover ofouter container 10 can be drained out through the plurality ofdrain holes 105 after heating and baking processes are performed, and the rate of reticle contamination caused by the reticle pod can therefore be decreased. - Then, referring to
FIG. 2 , which is a view of the retainer of the upper cover of inner container of the present invention. As shown inFIG. 2 , a plurality of throughholes 225 are disposed between the secondinner surface 221 and the outer surface ofupper cover 223 of theupper cover 22 of the inner container of the reticle pod; in addition, an O-shaped recess 2251 is formed as surrounding each of the throughholes 225 and is disposed with aspring element 42. Moreover, aretainer 40 is disposed in each of the throughholes 225. Theretainer 40 is formed by a supportingconvex pillar 401 with a size fitting for being inserted into athrough hole 225 and an O-shaped protruding portion 403 correspondingly disposed in the O-shaped recess 2251; the supportingconvex pillar 401 and the O-shaped protruding portion 403 are an integrated structure; wherein, the supportingconvex pillar 401 is inserted into thethrough hole 225, and the O-shaped protruding portion 403 is in the O-shaped recess 2251 and theprotruding portion 4031 of the O-shaped protruding portion 403 is in contact with thespring element 42; apparently, the length of the supportingconvex pillar 401 of theretainer 40 is larger than that of theprotruding portion 4031 of the O-shaped protruding portion 403. Additionally, the position of eachretainer 40 corresponds to eachsecond supporter 32 of the upper cover ofouter container 12. Furthermore, on a side of eachretainer 40 on the outer surface of upper cover ofinner container 223 of the upper cover ofinner container 22, afirst fastener 44 that fastens theretainer 40 is respectively disposed, thefirst fastener 44 having ahole 441 with a size smaller than theretainer 40 so that part of the surface of theretainer 40 can be exposed; therefore, with the O-shaped recess 2251 and thefirst fastener 44 being joined together, theretainer 40 can be fastened and prevented from dropping down. Moreover, thefirst fastener 44 of the present invention is lock-fastened to theinner container 2 for storing the reticle with a screw and can also be disposed in theinner container 2 for storing the reticle either via being snap-fitted or adhered to theinner container 2, the way of which is not limited in the present invention. And the material ofretainer 40 is a wear-resistant polymer material so that friction that may generate particles and dusts which contaminate thereticle 9 in theinner container 2 can be prevented. - Referring then to
FIG. 3 , which is a view of filter device of the upper cover of inner container of the present invention. As shown inFIG. 3 , on the upper cover ofinner container 22 of the reticle pod, a plurality offiltration holes 227 penetrating the upper cover ofinner container 22 are disposed, and afilter material 50 is disposed on each of thefiltration holes 227. Thefilter material 50 of the present invention can be a porous filter membrane and can be selected from the group consisting of: glass-fiber filter, static electricity filter, electrically conductive filter membrane, PTFE filter, and porous ceramic material, which is not limited in the present invention. Moreover, asecond retainer 52 can be further disposed on thefiltration hole 227 to reinforce the fastening; thesecond retainer 52 can be lock-fastened to theinner container 2 via a screw or in other ways, the way of lock-fastening thesecond retainer 52 is not limited in the present invention. In a preferred embodiment of the present invention, two filtration holes form a set and the upper cover ofinner container 22 is disposed with two sets offiltration holes 227, and yet the actual number offiltration holes 227 disposed is not limited in the present invention. - And then, referring to
FIG. 4 , which is a view of foolproof structure of the upper cover of inner container of the present invention. As shown inFIG. 4 , an integratedfoolproof structure 60 is respectively formed on four corners formed on theperiphery 222 of the upper cover ofinner container 22. The characteristic is in that a portion of thefoolproof structure 60 of the present invention will protrude from theperiphery 222 of the upper cover ofinner container 22, and thus, when the upper cover ofinner container 22 and the lower cover ofinner container 20 are joined together, the protruding portion of thefoolproof structure 60 will be snap-fitted on theperiphery 22 of the lower cover ofinner container 20; since thefoolproof structure 60 is respectively formed on the four corners, when theinner container 2 is closed, theupper cover 22 and thelower cover 20 are successfully joined only when all thefoolproof structures 60 on four corners are snap-fitted, the foolproof effect being thus achieved. Moreover, as the length and the width of theinner container 2 are not the same, the length-to-width ratio can also be taken into consideration when theinner container 2 is closed for determining whether the closing ofinner container 2 is correctly performed. - Referring then to
FIG. 5 , which is a view of the limiter of lower cover of inner container of the present invention. As shown inFIG. 5 , each of the four corners of the first inner surface ofinner container 201 of the lower cover ofinner container 20 has arecess 204, in which alimiter 70 is respectively disposed; thelimiter 70 is a horizontal bar-shapedsubstrate 701 with twoconvex columns 703 disposed on two sides, and abevel 704 is respectively formed at the open end of each of theconvex columns 703; a supportingprotruding point 705 is further disposed between the twoconvex columns 703 of the horizontal bar-shapedsubstrate 701, and the supportingprotruding point 705 and the twoconvex columns 703 are disposed on a straight line. When thelimiter 70 is disposed in therecess 204 of the first inner surface ofinner container 201, the top surface of the horizontal bar-shapedsubstrate 701 of thelimiter 70 and the first inner surface ofinner container 201 will be on the same horizontal level. When thereticle 9 is to be placed onto the first inner surface ofinner container 201, if thereticle 9 shifts its position, thereticle 9 can be guided to the correct position by thebevels 704 of theconvex columns 703 and each of the four corners of thereticle 9 is in contact with the supportingprotruding point 705 on the horizontal bar-shapedsubstrate 701; thereticle 9 is thus placed onto the first inner surface ofinner container 201. - Moreover, the pair of
convex columns 703 on eachlimiter 70 can serve as identification devices on the robot to identify reference point for reticle alignment so that the robot can accurately grip the reticle. Furthermore, in addition to being disposed at four corners of the firstinner surface 201 of theinner container 20, eachlimiter 70 of the present invention can be alternatively disposed on the point of intersection at 146 mm on each side of the firstinner surface 201 of theinner container 20; therefore, the position of eachlimiter 70 on the firstinner surface 201 is not limited in the present invention as long as the position of eachlimiter 70 is on or beyond the point of intersection at 146 mm on each side of the firstinner surface 201, such design ensuring that the supportingprotruding point 705 of eachlimiter 70 is only in contact with the edge of the reticle and does not cause wear of or damage to pattern on the reticle. - Then, referring to
FIG. 6 , which is a view of the window of the lower cover of inner container of the present invention. As shown inFIG. 6 , a plurality ofwindows 205 are disposed on the outer surface of lower cover ofinner container 203 which is on the opposite side of the first inner surface ofinner container 201 of the lower cover ofinner container 20, and atransparent substrate 80 made of transparent glass, transparent plastic material, or other materials is respectively disposed in each of thewindows 205; on thetransparent substrate 80, athird fastener 82 is further disposed for snap-fitting thetransparent substrate 80 to thewindow 205 and prevent thetransparent substrate 80 from dropping down. Thethird fastener 82 is a frame-shaped member with a size fitting to the window, and thus the reticle inside can be monitored from outside the lower cover ofinner container 20 via thewindow 205. Therefore, during the process, there will be signals from platforms to inspect the process and function of a reticle via thewindow 205. Moreover, a ring-shapedpad 84 is disposed between thetransparent substrate 80 and thethird fastener 82 and is made of polymer material such as PTFE; the primary objective of disposing the ring-shapedpad 84 is to isolate and thus prevent thetransparent substrate 80 from contacting thethird fastener 82 so that proper flexibility is allowed to protect thetransparent substrate 80 from being damaged. Furthermore, after thethird fastener 82 is disposed on the lower cover ofinner container 20, thethird fastener 82 and the outer surface of lower cover ofinner container 203 are at the same horizontal level, and thus the placement of theinner container 2 in theouter container 2 will not be hindered. Thethird fastener 82 of the present invention is lock-fastened onto the outer surface of lower cover ofinner container 203 of lower cover ofinner container 20 via a screw, and the way of lock-fastening is not limited in the present invention. - Referring to
FIG. 7 , which is a sectional view of the reticle pod of the present invention. As shown inFIG. 7 , thereticle 9 is first placed on the lower cover ofinner container 20 of theinner container 2, and, as described above, the four corners of thelower surface 91 of thereticle 9 will be first placed on the supporting protrudingpoints 705 of thelimiters 70 disposed on the four corners of the first inner surface ofinner container 201. The twocolumns 703 on two sides of each supportingprotruding point 705 will be located right on theperiphery 95 of the reticle 9 (namely, two sides of the right-angle corner). Thus, the two sides of each of the four right-angle corners of thereticle 9 will be respectively clamped by eachconvex column 703 and thereticle 9 can be prevented from shifting. In the following, facilitated by the guidance of thefoolproof structure 60 of the upper cover ofinner container 22, the upper cover ofinner container 22 is joined with the lower cover ofinner container 20 in the designated direction and aninner container 2 for protecting thereticle 9 is thus formed. - Then, the
inner container 2 is placed onto the plurality offirst supporters 30 of the lower cover ofouter container 10 of theouter container 1; wherein, thefirst supporters 30 correspond to thepositioning groove 207 of the outer surface of lower cover ofinner container 203 of the lower cover of inner container 20 (referring toFIG. 6 ), and therefore, theinner container 2 is guided by thepositioning groove 207 to the correct position when being placed. The upper cover ofouter container 12 is then closed; wherein, when the upper cover ofouter container 12 is to be closed, each of thesecond supporters 32 on the upper cover ofouter container 12 aligns with theretainer 40 in each of the throughholes 225 of the upper cover ofinner container 22. When the upper cover of outer container 12 is closed, each second supporter 32 is driven by the closing action to exert a downward force and impose pressure on the exposed portion of the retainer 40 in the through hole 225; when the retainer 40 is pressed, the O-shaped protruding portion 403 will then impose pressure on the O-shaped spring element 42 in the O-shaped recess 2251, and the retainer 40 will then press further down and inward (i.e. when the O-shaped spring element 42 is pressed, there is flexible space for the retainer 40 to press inward, and contrariwise, when the O-shaped spring element 42 is not pressed, its flexibility facilitates the retainer 40 to resume the original position); the supporting convex pillars 401 integrated with the O-shaped protruding portions 403 will also be pressed down and inward and will then be in contact with four corners of the upper surface 93 of the reticle 9, in other words, when the upper cover of outer container 12 is closed, the supporting convex pillars 401 of the retainers 40 at four corners of the reticle 9 will press the four corners of the upper surface 93 of the reticle 9, and therefore the reticle 9 can be stably fastened in the inner container 2 with the existent support from the supporting protruding points 705 of the four corners of the lower surface 91 of the reticle 9; the inner container 2 can also be stabilized with the second supporters 32 of the upper cover of outer container 12 pressing inward, and the security of the reticle 9 in the storing and transporting process is further ensured. - Although the present invention has been described with reference to the aforementioned preferred embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims.
Claims (20)
Applications Claiming Priority (2)
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TW100101022A TWI414464B (en) | 2011-01-11 | 2011-01-11 | Euv pod with fixed apparatus |
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Also Published As
Publication number | Publication date |
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KR101247940B1 (en) | 2013-04-01 |
US8220630B1 (en) | 2012-07-17 |
KR20120081541A (en) | 2012-07-19 |
TWI414464B (en) | 2013-11-11 |
TW201228902A (en) | 2012-07-16 |
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