WO2005057649A1 - 半導体ウェーハキャリア容器 - Google Patents
半導体ウェーハキャリア容器 Download PDFInfo
- Publication number
- WO2005057649A1 WO2005057649A1 PCT/JP2004/018268 JP2004018268W WO2005057649A1 WO 2005057649 A1 WO2005057649 A1 WO 2005057649A1 JP 2004018268 W JP2004018268 W JP 2004018268W WO 2005057649 A1 WO2005057649 A1 WO 2005057649A1
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- WIPO (PCT)
- Prior art keywords
- resin composition
- cover
- semiconductor wafer
- wafer carrier
- container body
- Prior art date
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Classifications
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- 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
- H01L21/67366—Closed carriers characterised by materials, roughness, coatings or the like
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- 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
- H01L21/67386—Closed carriers characterised by the construction of the closed carrier
-
- 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
- H01L21/67396—Closed carriers characterised by the presence of antistatic elements
Definitions
- the present invention relates to a semiconductor wafer carrier container including a container body on which a semiconductor wafer carrier is placed and a force bar covering the container body.
- the present invention relates to a semiconductor wafer carrier container in which the container body has excellent scratch resistance and the cover has transparency.
- Silicon wafers in a semiconductor manufacturing process are handled in a clean room to prevent contamination.
- a wafer carrier capable of accommodating a plurality of silicon wafers at the same time is used.
- the ENO carrier is mounted on an EHA processing apparatus, from which the EHA is removed by a robot and used for processing.
- processing such as direct cleaning is performed while the silicon wafer is housed in the wafer carrier. Therefore, many of the e-carriers are directly exposed to the atmosphere in the e-power S clean room. Therefore, during storage or transport in a clean room, in order to prevent particle contamination of the wafers contained in the wafer carrier, a semiconductor wafer carrier container containing the entire wafer carrier has been developed. It is used.
- the resin used as the material of the wafer carrier and the container for housing the wafer carrier varies depending on the purpose.
- Various resins are used depending on the application.
- the container preferably has an antistatic property. Since the resins listed above are all insulators, it is necessary to add an antistatic agent to impart antistatic properties.
- a method of blending conductive carbon particles or carbon fibers as an antistatic agent, or an organic compound having a polar group There is known a method of blending an antistatic agent composed of a substance.
- Patent Document 1 Japanese Patent Publication No. 2002-531660 (Patent Document 1) describes a conductive semiconductor wafer container made of a resin composition containing carbon fibers having a specific volume resistivity. ing.
- examples of an ae carrier prepared by combining carbon fibers and carbon particles with polycarbonate are also described.
- the antistatic property is imparted using carbon fiber, the molded article loses transparency, and cannot be used in applications that require internal visibility.
- Patent Document 2 Japanese Patent Application Laid-Open No. 9-92714
- Examples of this publication include semiconductor wafer storage containers using various antistatic resins such as ABS-based permanent antistatic resin, HIPS-based permanent antistatic resin, and resin containing PP-based carbon black.
- An example is provided.
- the containers described here have good antistatic properties and, depending on the brand, also have excellent transparency.
- the ABS permanent antistatic resin described in Example 3 has excellent transparency. When a resin having excellent transparency is used, the inside of the container can be confirmed from the outside.
- Patent Document 3 discloses that a (meth) acrylic acid ester monomer and another vinyl monomer which can be copolymerized therewith in the presence of a rubbery polymer.
- a thermoplastic resin composition in which a polyetheresteramide is blended with a polymer obtained by graft polymerization of a copolymer mixture having physical strength is described.
- the resin composition is said to be excellent in permanent antistatic properties, impact resistance and transparency, and can be used in applications where it is desired to prevent damage due to static electricity, for example, it can be used for IC carrier cases. You.
- ABS resin and similar resins are general-purpose resins that have an excellent balance of dimensional accuracy during molding, smoothness of the molded product surface, rigidity, impact resistance, etc., and have a relatively low resin cost. is there.
- ABS resin provided with the antistatic property is one of suitable materials for the container for housing the semiconductor wafer.
- the control level of particles in a clean room has become more severe with the miniaturization of semiconductor devices, and the performance required for such semiconductor wafer carrier containers has continued to increase. That is the current situation. Therefore, it was clarified that when a semiconductor carrier container containing an A carrier was produced using an antistatic ABS resin composition, there was a problem with the abrasion resistance.
- a carrier containing a large number of semiconductor wafers has been increasing in weight with an increase in diameter in recent years.
- polyetheretherketone (PEEK) and polybutylene terephthalate (PBT) which are typical resins used for carriers, are resins having high strength and hardness.
- PEEK polyetheretherketone
- PBT polybutylene terephthalate
- the inner surface of the wafer carrier container on which the wafer carrier is placed is easily damaged by friction caused by taking the carrier in and out.
- the size of the carrier container itself which has been increased in size and increased in total weight, is often being handled by a robot.
- the bottom surface of the carrier container containing the carrier is also made of a metal member. The problem is that scratches, which often cause friction, occur.
- a resin composition which is transparent and conductive has a problem that the hardness is often reduced by adding a conductivity-imparting agent, and the scratch resistance is insufficient.
- Patent Document 1 Japanese Patent Publication No. 2002-531660
- Patent Document 2 JP-A-9-92714
- Patent Document 3 JP-A-62-119256
- the present invention has been made to solve the above problems, and has excellent antistatic properties, excellent antifouling properties, excellent scratch resistance, and excellent internal visibility. It is intended to provide a carrier container.
- An object of the present invention is to provide a semiconductor carrier carrier container including a container main body on which a semiconductor carrier is mounted, and a cover covering the container main body, wherein the container main body is made of a thermoplastic resin. al) and carbon fiber (a2).
- a resin composition (A) consisting of carbohydrate is formed, the surface resistivity of the container body is 10 2 to 10 12 ⁇ , and the cover is a thermoplastic resin.
- the cover must be transparent
- the problem is solved by providing a semiconductor wafer carrier container characterized by the following.
- the resin composition (A) contains 60 to 99% by weight of the thermoplastic resin (al) and 1 to 40% by weight of the carbon fiber (a2). It is preferable that the thermoplastic resin (al) is an amorphous thermoplastic resin, particularly a polycarbonate. It is also preferable that the resin composition (A) has a Rockwell hardness of 110 to 140 (unit: R scale) and the resin composition (A) has a flexural modulus of force of 000 to 21000 MPa.
- the resin composition (B) contains 70 to 99% by weight of the thermoplastic resin (bl) and 1 to 30% by weight of the antistatic agent (b2). It is preferable that the thermoplastic resin (bl) is one selected from the group consisting of styrene resin, poly (meth) acrylate, polyacrylonitrile, and polycarbonate, and the antistatic agent (b2) Is preferably a high molecular compound. Resin composition (B) force It is also preferable that the resin composition has a haze of 30% or less when formed into an injection molded product having a thickness of 3 mm.
- the resin composition (B) preferably has a Rockwell hardness of 80 to 140 (unit: R scale).
- the cover is a molded article in which the resin composition (A) and the resin composition (B) are combined, and the portion that comes into contact with the container body is made of the resin composition (A). It is a preferred embodiment to be done. At this time, it is preferable that the resin composition (A) and the resin composition (B) are combined by insert molding or two-color molding.
- An elastic member is fixed to either the container main body or the cover, and when the container is closed, the elastic member is disposed between the container main body and the force bar, and the container main body and the cover are connected to each other. It is also a preferred embodiment that the cover does not touch each other. At this time, the height of the elastic member is preferably 1 mm or less.
- the semiconductor carrier is an aerial carrier container that is closed by a peripheral portion of the cover covering an outer edge of an upper edge of the opening of the container body.
- the container body has a slope obliquely outward and downward from the upper edge of the opening
- the cover has a slope on the inner surface of the peripheral edge
- the two slopes are substantially parallel to each other. It is more preferable that the talliance between the two slopes is 1 mm or less, and the opposing width of the two slopes is 5 to 50 mm.
- the invention's effect The semiconductor wafer carrier container of the present invention has excellent antistatic properties, excellent antifouling properties, excellent abrasion resistance, and excellent internal visibility, and requires a high degree of cleanliness. It is suitable for use in manufacturing processes.
- FIG. 1 is a plan view of a container body.
- FIG. 2 is a front view of a container body.
- FIG. 3 is a left side view of the container body.
- FIG. 4 is a plan view of a cover.
- FIG. 5 is a front view of a cover.
- FIG. 6 is a right side view of a cover.
- FIG. 7 is a cross-sectional view taken along the line AA, showing a state when the container body and the cover are combined.
- the semiconductor wafer carrier container of the present invention includes a container body on which the semiconductor wafer carrier is placed, and a cover that covers the container body.
- the container body is formed by molding a resin composition (A) composed of thermoplastic resin (al) and carbon fiber (a2).
- a resin composition (A) composed of thermoplastic resin (al) and carbon fiber (a2).
- carbon fibers (a2) are blended to reduce the surface resistivity of the container body.
- the hardness of the resin composition (A) increases, and the frictional resistance of the surface decreases, so that the abrasion resistance of the container body is improved, and the generation of dust due to friction is improved. Is prevented.
- the carbon fiber (a2) the elastic modulus of the resin composition (A) is increased to obtain a large-sized molded product, Stability is improved.
- the thermoplastic resin (al) is not particularly limited, and includes: polycarbonate; polyester such as polybutylene terephthalate (PBT) and polyethylene terephthalate; polyamide; polyolefin such as polypropylene (PP) and cyclic olefin polymer; PS), high impact polystyrene (HIPS), acrylonitrile butadiene styrene copolymer (ABS resin), acrylo-tolyl styrene copolymer (AS resin), methyl methacrylate-styrene copolymer (MS resin) ); Poly (meth) acrylate; polyacrylonitrile (PAN); polyetheretherketone (PEEK); polyphenylene sulfide (PPS); polyacetal; You can choose.
- PAN polyacrylonitrile
- PEEK polyetheretherketone
- PPS polyphenylene sulfide
- thermoplastic resin (al) it is preferable to use an amorphous thermoplastic resin as the thermoplastic resin (al). Since the amorphous resin has a smaller shrinkage ratio during molding than the crystalline resin, a molded product having excellent dimensional accuracy can be obtained.
- the resin composition containing the carbon fiber (a2) is injection-molded, the carbon fiber (a2) in the molded product is easily oriented. At this time, if crystalline resin is used, the orientation of the crystal is likely to occur due to the orientation of the carbon fiber (a2). If the dimensional accuracy is low and the gap between the container body and the cover is too wide, the sealing performance of the case is reduced and the possibility of particles entering increases.
- the container main body and the cover will be rubbed at the time of opening and closing, and are likely to be damaged. Therefore, it is preferable to use an amorphous thermoplastic resin having excellent dimensional accuracy during molding.
- a molded article made of an amorphous resin has a smoother surface than a molded article made of a crystalline resin. The surface tends to be easily scratched by excessive friction.
- the friction resistance of the surface of the molded article can be reduced by blending the carbon fiber (a2). Good abrasion resistance even when resin is used.
- the amorphous resin includes a resin whose main component is amorphous even if an alloy composed of a plurality of resin components is formed, such as ABS resin.
- the glass transition temperature is preferably from 60 to 200 ° C.
- the heat resistance is not sufficient and more preferably 100 ° C or higher.
- the glass transition temperature exceeds 200 ° C, melt molding becomes difficult, and the temperature is more preferably 160 ° C or less immediately.
- the glass transition point is measured by the position of the inflection point in DSC (differential calorimetry) measurement.
- the glass transition temperature of the polycarbonate used in the examples of the present invention is usually 140 to 150 ° C.
- the carbon fiber (a2) to be blended with the thermoplastic resin (al) is not particularly limited, and various carbon fibers such as polyacrylotrile (PAN), pitch, cellulose, and lignin are used. can do. Considering the ease of blending by melt-kneading, blending of short fibers is preferred.
- PAN polyacrylotrile
- pitch pitch
- cellulose cellulose
- lignin lignin
- the resin composition (A) contains 60 to 99% by weight of the thermoplastic resin (al) and 1 to 40% by weight of the carbon fiber (a2).
- the content of the carbon fiber (a2) is less than 1% by weight, the antistatic property tends to be insufficient.
- the content of the carbon fiber (a2) is more preferably at least 2% by weight, even more preferably at least 5% by weight.
- the content of the thermoplastic resin (al) is 98% by weight or less and 95% by weight or less, respectively.
- the content of the carbon fiber (a2) is more than 40% by weight, the melt moldability is reduced and the mechanical properties of the container body are apt to be reduced.
- the content of the carbon fiber (a2) is more preferably 30% by weight or less, and even more preferably 20% by weight or less.
- the content of the thermoplastic resin (al) is 70% by weight or more and 80% by weight or more, respectively. Fillers other than carbon fiber (a2) may be used in combination, but in consideration of contamination-resistant applications, heat is substantially eliminated except for trace components. Preference is given to a resin composition which is also strong only in plastic resin (al) and carbon fiber (a2).
- thermoplastic resin (al) and the carbon fiber (a2) are not particularly limited, and both are usually melt-kneaded and mixed. Usually, it is possible to mix simultaneously at the time of melt molding. Usually, it is preferable to subject the resin composition (A) pellets obtained by melt-kneading in advance to melt molding.
- the resin composition (A) preferably has a Rockwell hardness of 110 to 140 (unit: R scale). By having such high hardness, a container body having excellent scratch resistance can be obtained. It is more preferably at least 115, even more preferably at least 120. On the other hand, if the hardness is too high, the melt formability and mechanical strength often decrease. It is more preferably 135 or less, still more preferably 130 or less.
- the Rockwell hardness in the present invention is a value (R scale) measured at 23 ° C. according to ASTM D-785.
- the resin composition (A) has a flexural modulus of 4000 to 21000 MPa.
- a flexural modulus of 4000 to 21000 MPa.
- the shape retention of the container body is improved.
- the weight of the wafer carrier containing a large number of semiconductor wafers has also increased, and the required level of the shape retention of the container body containing the wafer has been high. I'm familiar.
- the flexural modulus is less than OOOMPa, the shape retention of the container body may be insufficient, more preferably 5000MPa or more, and still more preferably 5500MPa or more.
- the container body when the flexural modulus exceeds 21000 MPa, the container body may become brittle, more preferably 15,000 MPa or less, and still more preferably 100 000 MPa or less.
- the flexural modulus in the present invention is a value measured at 23 ° C. in accordance with ASTM D-790.
- the above Rockwell hardness or flexural modulus is obtained by measuring a test piece composed of a melt-molded product of the resin composition (A).
- the resin composition (A) is melt-molded to produce a container main body.
- the surface resistivity of the container main body is 10 2 to 10 12 ⁇ square. It is. If the surface resistivity is less than 10 2 ⁇ port, as the surface resistivity required for antistatic will have excessive conductivity, in this case, you have too much carbon fiber amount hand The mechanical properties are also insufficient.
- the surface resistivity is preferably not less than 10 3 ⁇ . On the other hand, if the surface resistivity exceeds 10 12 ⁇ / cm2, the antistatic property becomes insufficient, and it is not possible to sufficiently secure the adhesion of partal.
- the surface resistivity is preferably no more than ⁇ mouth.
- the surface resistivity in the present invention is a value measured at 23 ° C. and a humidity of 50% RH.
- the cover constituting the semiconductor wafer carrier container of the present invention is formed by molding a thermoplastic resin (bl) and an antistatic agent comprising an organic compound (b2) and a resin composition (B) which is strong. Things.
- an antistatic agent (b2) which is an organic compound, is blended to reduce the surface resistivity of the cover.
- thermoplastic resin (bl) is not particularly limited as long as it is a resin having transparency by itself.
- Polycarbonate polystyrene (PS), high-impact polystyrene (HIPS), and Atariguchi-tolyl-butadiene styrene Styrene-based polymers such as polymers (ABS resin), acrylonitrile styrene copolymer (AS resin), methyl methacrylate-styrene copolymer (MS resin); polypropylene (PP) and cyclic olefin polymers It can be selected from resins such as polyolefin, poly (meth) acrylate, and polyacrylonitrile depending on the purpose.
- PS polystyrene
- HIPS high-impact polystyrene
- Atariguchi-tolyl-butadiene styrene Styrene-based polymers such as polymers (ABS resin), acrylonitrile styrene copoly
- thermoplastic resin (bl) it is preferable to use an amorphous thermoplastic resin as the thermoplastic resin (bl).
- Amorphous resin has a smaller degree of shrinkage during molding than a crystalline resin that often has good transparency, so that a molded product having excellent dimensional accuracy can be obtained.
- the disadvantages of low dimensional accuracy are as already mentioned in the description of thermoplastic resin (al).
- the preferred glass transition temperature when the thermoplastic resin (bl) is an amorphous thermoplastic resin is the same as that for the thermoplastic resin (al) described above.
- thermoplastic resin (bl) examples include a styrene-based polymer, poly (meth) acrylate, polyacrylonitrile, and polycarbonate.
- a styrene resin is preferable, and in particular, a styrene monomer is polymerized in a matrix resin which is a copolymer of a styrene monomer and another monomer copolymerizable with the styrene monomer.
- system A resin in which rubber particles are dispersed is preferably used.
- copolymerizable monomers used here are not particularly limited as long as they can be copolymerized with a styrene monomer, such as acrylonitrile and metal-mouth-tolyl.
- Cyanide butyl monomer represented by acrylonitrile
- Unsaturation power represented by (meth) acrylate monomer such as methyl acrylate, ethyl acrylate, methyl methacrylate, and ethyl methacrylate Acid alkyl ester monomers
- maleimide, methylmaleimide, ethyl maleimide And maleimide monomers such as N-phenylmaleimide and O-chloro-N-phenylmaleimide.
- the other copolymerizable monomer is at least one selected from a vinyl cyanide monomer and an unsaturated carboxylic acid alkyl ester monomer.
- the heat resistance, chemical resistance, rigidity, and dimensional stability are improved by copolymerizing the Cyanidani vinyl monomer.
- the resin is usually replaced with an ABS resin (acrylonitrile butadiene-styrene copolymer). Union).
- ABS resin acrylonitrile butadiene-styrene copolymer
- Union In order to improve transparency, it is preferable to copolymerize an unsaturated carboxylic acid alkyl ester monomer.
- those obtained by copolymerizing both a cyanide vinyl monomer and an unsaturated carboxylic acid alkyl ester monomer are particularly preferred.
- the antistatic agent (b2) blended with the thermoplastic resin (bl) also has an organic compound power. If an electrically conductive filler such as carbon fiber or carbon black is added, the transparency of the cover will be impaired and the inside will not be visible, so an antistatic agent (b2) made of an organic compound is added. This is very important. It is preferable that the antistatic agent (b2) is a polymer compound because it does not easily bleed to the surface and does not easily become a contamination source. Also, it is possible to maintain stable antistatic performance for a long period of time.
- the polymer compound used in the antistatic agent has a polar group, and examples thereof include polyalkylene oxide, polyetheresteramide, polyesteresteramide, polyester, polyamide, and polyurethane. Among them, polyalkylene oxide, polyetheresteramide, and polyesteresteramide are preferred, and polyetheresteramide is particularly preferred.
- the resin composition (B) contains 70 to 99% by weight of the thermoplastic resin (bl) and the antistatic agent (b2). It is preferable that the content be 1 to 30% by weight. When the content of the antistatic agent (b2) is less than 1% by weight, the surface resistivity does not sufficiently decrease and the antistatic property tends to be insufficient. The content of the antistatic agent (b2) is more preferably 2% by weight or more, even more preferably 5% by weight or more. At this time, the content of the thermoplastic resin (bl) is 98% by weight or less and 95% by weight or less, respectively.
- the content of the antistatic agent (b2) is more than 30% by weight, the hardness of the resin composition (B) is reduced and the scratch resistance is reduced, and the elastic modulus is lowered and the form is retained. Is reduced.
- the content of the antistatic agent (b2) is more preferably at most 25% by weight, even more preferably at most 20% by weight.
- the content of the thermoplastic resin (bl) is 75% by weight or more and 80% by weight or more, respectively.
- thermoplastic resin (bl) and the antistatic agent (b2) are not particularly limited, and the two are usually mixed by melt-kneading. Force that can be kneaded during melt molding Usually, it is preferable to use pellets of the resin composition (B) obtained by melt-kneading in advance for melt molding.
- the cover must have transparency so that the inside of the container can be visually recognized.
- the resin composition constituting the cover (B) is preferably a resin composition having a haze of 30% or less when formed into an injection-molded product having a thickness of 3 mm, which is preferably 20% or less. More preferably, it is more preferably 10% or less.
- the haze in the present invention is a value obtained by measuring a sample having a thickness of 3 mm at 23 ° C. in accordance with ASTM D-1003.
- the resin composition (B) preferably has a Rockwell hardness of 80 to 140 (unit: kale). Since the cover does not directly mount an e-carrier on the cover and the bottom surface does not come into contact with a metal member or the like, a high hardness such as the resin composition (A) is necessarily required. It is not done. While pressing, the container body made of the resin composition (A) and the cover made of the resin composition (B) often come into contact with each other, thereby suppressing the occurrence of scratches due to friction at this time. It is also important to do. As described above, the resin composition (A) of the present invention has a low frictional resistance.
- the resin composition (A) is generated by mutual friction between the container body and the cover. Dust must be strictly controlled.
- the resin composition (A) containing the carbon fiber (a2) has a higher hardness. Therefore, it is preferable that the hardness of the resin composition (B) is equal to or higher than a certain value from the viewpoint of scratch resistance.
- the Rockwell hardness of the resin composition (B) is more preferably 90 or more, and even more preferably 95 or more.
- the hardness is too high, the antistatic performance is often insufficient, more preferably 130 or less, even more preferably 120 or less.
- the flexural modulus of the resin composition (B) may be lower than that of the resin composition (A). Usually it is about 1000-4000MPa.
- a cover is manufactured by melt-molding the resin composition (B).
- the power bar has a surface resistivity of 10 3 -10 13 ⁇ / port. If the surface resistivity is less than 10 3 ⁇ / cm2, the amount of the antistatic agent is too large, and the hardness of the cover decreases and the elastic modulus also decreases.
- the surface resistivity is preferably 10 5 ⁇ 5 or more, more preferably 10 8 ⁇ or more. On the other hand, when the surface resistivity exceeds 10 13 ⁇ , the antistatic property becomes insufficient, and the performance of preventing adhesion of particles cannot be sufficiently exhibited.
- the surface resistivity is preferably 10 12 ⁇ 12 or less, more preferably ⁇ ⁇ ⁇ ⁇ or less.
- a container body is formed using the resin composition ( ⁇ ) described above, and a cover is formed using the resin composition ( ⁇ ).
- injection molding is preferably employed from the viewpoint of dimensional accuracy.
- the same kind of resin is used for the container body and the cover, but the present invention is characterized in that different materials are intentionally selected. Therefore, the suitable molding conditions are different between the cover and the container body, and the molding shrinkage ratio is also different. Therefore, it is necessary to adjust the design of the mold in accordance with each material.
- the abrasion resistance can be improved by a measure for increasing the hardness of the resin composition ( ⁇ ).
- the cover may be replaced with a resin. It is preferable to form a molded article in which the fat composition ( ⁇ ) and the fat composition ( ⁇ ) are combined, and to make the portion in contact with the container body from the fat composition ( ⁇ ). In this case, since the resin compositions ( ⁇ ) having high hardness and low frictional resistance come into contact with each other, the occurrence of scratches can be minimized.
- the fat composition (A) and the fat composition (A) used in the container body may be the same fat composition or different fat compositions.
- the hardness of the resin composition (B) does not need to be so high, and is usually about 60 to 140 (unit: R scale) in Rockwell hardness.
- the resin composition (A) may constitute a portion that comes into contact with the container body.
- the resin composition (B) may be used in a range where the internal visibility is ensured. From the viewpoint of improving the internal visibility, a mode in which the resin composition (A) is arranged in a strip shape only on the peripheral portion of the force bar is preferable.
- the method of combining the resin composition (A) and the resin composition (B) is not particularly limited! A molded article made of the resin composition (A) and a molded article made of the resin composition (B) may be manufactured in advance, and then both may be combined. For example, both may be bonded with an adhesive, may be fitted, or may be thermally fused.
- an adhesive is used, contaminants are easily generated, there is a possibility that a gap is formed when the adhesive is inserted, and there is a possibility that distortion due to heat is generated when the heat sealing is performed. Therefore, it is preferable that the resin composition (A) and the resin composition (B) are combined by insert molding or two-color molding. By doing so, it is possible to obtain a clean molded article with good dimensional accuracy.
- Insert molding refers to a method in which a molded article preformed using either the resin composition (A) or the resin composition (B) is put into a mold, pressed, and then inserted. This is a method of injection molding the resin composition. Further, two-color molding refers to using the same mold, injecting either the resin composition (A) or the resin composition (B) in advance, and then continuing to use the other mold. This is a method of injecting a fat composition.
- the form of the semiconductor wafer carrier container of the present invention obtained in this way is not particularly limited, as long as it is constituted by a container body on which the semiconductor wafer carrier is placed and a cover covering the container body. .
- the container body may be simply a flat plate as long as it can be covered with a cover.
- SMIF Standard Mechanical Interface
- a wafer carrier is placed on a flat plate-like molded product, and a transparent cover covers the carrier. May be.
- FOU P Front Opening Unified Pod
- FOSB Front Opening Shipping Box
- a configuration in which the container body and the cover are connected by a hinge can also be adopted, which is convenient for opening and closing. 1S In this case, sliding at the hinge may cause scratches and generate dust. It may not be suitable for some applications. Therefore, a container which does not have a hinge structure and has a structure in which the opening of the container body is simply covered with the cover is preferable.
- the outer edge of the opening of the container body be closed with the peripheral portion of the cover being covered. By doing so, the particles must penetrate against gravity.
- the container body has a slope obliquely outward and downward from the upper edge of the opening, and the cover has a slope on the inner surface of the peripheral portion, and both slopes are also preferably substantially parallel to each other.
- the clearance (gap) between both slopes is 1 mm or less, and the width of the slope is 5 to 50 mm.
- the slope obliquely, it is possible to cover the container body smoothly when the cover is put on the container body.At that time, the container body and the cover do not come into strong contact with each other. It can also be suppressed.
- a material that can prevent dust generation when the container body and the cover come into contact with each other is selected, so that dust generation is more efficiently performed. Can be prevented.
- the upper edge of the opening of the container body is vertically opposed to and contacts the inner surface of the cover. That is, it is preferable that the cover be placed on the upper edge of the opening.
- the clearance (gap) between the opposing members is 1 mm or less. It is preferable that the gap is set uniformly so that there is a place where it touches and a place where it floats because it can prevent the invasion of particles.
- the width of the portion where the upper edge of the opening of the container body and the inner surface of the cover face each other is preferably 3 to 25 mm.
- the elastic member As a measure for improving abrasion resistance to friction between the container body and the cover, When the container is closed, the elastic member is fixed between the container body and the cover. When the container is closed, the elastic member is disposed between the container body and the cover. It is also a preferred embodiment to prevent the contact with the surface. Since the hard materials do not directly contact each other, scratches due to friction are less likely to occur. However, the active member itself may be a source of contamination, so care must be taken depending on the application.
- the type of the elastic member is not particularly limited, and various rubbers and flexible resins can be used. In this case, the hardness of the resin composition (B) does not need to be so high, and is usually about 60 to 140 (unit: kale) in Rockwell hardness.
- the elastic member may be arranged over the entire circumference between the container body and the cover, or may be partially arranged.
- the height of the elastic member is preferably 1 mm or less. This height refers to the height from the surface of the container body or cover to which the elastic member is fixed to the upper surface of the elastic member. When the height is 1 mm or less, the clearance between the container body and the cover can be narrowed, and the intrusion of particles can be suppressed.
- the elastic member may be bonded with an adhesive, may be fitted, or may be thermally fused. Further, it is also possible to use a thermoplastic elastomer as the elastic member and to integrally mold it by insert molding or two-color molding.
- the size of the semiconductor wafer carrier to be housed is not particularly limited, but is preferably a semiconductor wafer carrier of 4 inches or more.
- the larger the weight of the wafer carrier the greater the benefit of adopting the configuration of the present invention. Therefore, it is more preferable to use a semiconductor of 6 inches or more for semiconductors, and it is more preferable to use semiconductors of 8 inches or more for semiconductors. There are more preferred.
- A No warpage or distortion is observed, and there is almost no gap between the main body and the lid.
- B Slight sink and distortion are slightly recognized, and a slight gap is generated between the main body and the lid.
- the molded product obtained by injection molding was allowed to stand at room temperature for 24 hours, and then conditioned at 23 ° C and a humidity of 50% RH for 6 hours or more.
- the surface resistivity ( ⁇ Z mouth) at the five locations shown in FIGS. 3 and 6 was measured at 100 V with a resistance meter “SUPE MEGOHMMETER SM-21E” manufactured by Toa Denpa Kogyo Co., Ltd. The measurement was performed by applying an applied voltage.
- conductive rubber with a thickness of 2 mm and 10 mm square was placed between the positive and negative electrode terminals and the surface of the molded product, and the distance between the conductive rubbers was 10 mm. .
- the resistance value of the conductive rubber used here is much smaller than the molded product to be evaluated, and the resistance value due to it can be ignored.
- A Slight scratches, but no abrasion powder.
- a polyetheretherketone (PEEK) carrier containing carbon powder loaded with 25 pieces of 8-inch silicon wafer is placed on the container body of the container obtained by injection molding.
- the plate was slid on a stainless plate with punched holes at a sliding distance of 30 cm at a speed of 30 reciprocations / minute for 15 minutes. After this test, the appearance of the sliding wear surface of the container body was visually evaluated. Ratings were based on the following criteria:
- A Slight scratches, but no abrasion powder.
- FIGS. 17A and 17B show the shapes of the semiconductor wafer carrier containers formed in the following Examples and Comparative Examples.
- the container accommodates an 8 inch diameter semiconductor wafer carrier, and includes a container body 1 and a cover 2.
- 1 is a plan view of the container body 1
- FIG. 2 is a front view of the container body 1
- FIG. 3 is a left side view of the container body 1.
- the container body 1 is formed with a flat opening upper edge 3 having a width of about 15 mm over the entire circumference of the opening, and the cover 2 is placed thereon. ⁇
- the upper edge 3 of the opening on the front side where the aer carrier is put in and out is low.
- a slope 4 is provided diagonally outward and downward from the upper edge 3 of the opening, and faces a slope 5 on the inner surface of the cover 2.
- FIG. 4 is a plan view of the cover 2
- FIG. 5 is a front view of the cover 2
- FIG. 6 is a right side view of the cover 2.
- the cover 2 is put on the container body 1 with the top and bottom turned upside down.
- a flat portion 6 having a width of about 15 mm is formed on the inner surface of the cover 2 over the entire periphery thereof, and the flat portion 6 faces the upper edge 3 of the opening of the container body 1.
- a slope 5 is provided, which faces the slope 4 of the container body 1.
- FIG. 7 is a cross-sectional view showing a state in which the container body 1 shown in FIGS. 13 and 13 and the cover 2 shown in FIGS.
- the slopes 4 and 5 are substantially parallel to each other, the clearance between the slopes at the facing portion is 1 mm or less, and the width of the slopes is opposite. It is about 10mm.
- the upper edge 3 of the opening of the container body 1 and the flat portion 6 on the inner surface of the cover 2 are in contact with a clearance of 1 mm or less, and the width of the opposing portions is about 10 mm.
- the slopes 4 and 5 face each other substantially parallel to each other, the clearance between the two slopes at the facing portion is 1 mm or less, and the width of the opposite slopes Is about 15mm.
- the upper edge 3 of the opening of the container body 1 and the flat portion 6 of the cover 2 are substantially in contact with no clearance, and the width of the mutually opposing portions is about 15 mm.
- the resin composition (A) a carbon fiber-containing conductive polycarbonate resin composition (“SD POLYCA CF5101V” manufactured by Sumitomo Corporation) was used.
- the resin composition is a resin composition in which short carbon fibers are blended with 10% by weight of polycarbonate.
- a container body shown in FIGS. 13 and 13 was produced using an injection molding machine “J450E-C5” manufactured by Japan Steel Works, Ltd.
- the screw diameter of the injection molding machine is 76 mm.
- the molding conditions are as follows.
- An ABS-based persistent transparent antistatic resin composition (“Tech-Ace TE-2200" manufactured by Nippon A & L Co., Ltd.) was used as the antistatic agent for the ABS resin as a hydrophilic polymer.
- the ABS resin contains 15% by weight of polyetherester amide.
- Butadiene particles are dispersed in a matrix of the terpolymer contained in the component, and the transparency is improved by copolymerizing methyl methacrylate.
- the haze value of a 3 mm-thick test piece measured by a reflectance / transmittance meter HR-100 manufactured by Murakami Color Research Laboratory Co., Ltd. was 7%.
- a cover shown in FIGS. 416 was produced using an injection molding machine “J450E-C5” manufactured by Japan Steel Works, Ltd.
- the screw diameter of the injection molding machine is 76 mm.
- the molding conditions are as follows.
- the resin composition (A) a carbon fiber-based conductive polypropylene resin (“LRP410C” manufactured by Osaka Gas Chemical Co., Ltd.) was used.
- the resin composition is a resin composition obtained by blending about 10% by weight of short fibers of carbon fibers with polypropylene.
- an injection molding machine “J450E-C5” manufactured by Japan Steel Works, Ltd. was used to produce a container body shown in FIGS.
- the screw diameter of the injection molding machine is 76 mm.
- the molding conditions are as follows.
- Example 1 Using the same “Tech-Ace TE-2200” manufactured by Nippon A & L Co., Ltd. as used in Example 1, under the same molding conditions as in Example 1, the cover shown in FIGS. Work Made. The obtained molded product was evaluated in the same manner as in Example 1 for appearance evaluation, visibility evaluation, surface resistance value evaluation, and abrasion resistance evaluation. The results are summarized in Table 1.
- Both the container body and the cover were molded in the same manner as in Example 1 by using the same “Tech-Ace TE-2200” manufactured by Nippon A & L Corporation as used in Example 1.
- the molding conditions are the same as those for molding the cover of Example 1 for both the container body and the cover.
- the obtained molded article was evaluated in the same manner as in Example 1 for appearance evaluation, visibility evaluation, surface resistance value evaluation, and abrasion resistance evaluation. The results are summarized in Table 1.
- Example 1 Using the same “Tech-Ace TE-2200” manufactured by Nippon A & L Co., Ltd. as used in Example 1, under the same molding conditions as in Example 1, the cover shown in FIGS. Made. The obtained molded product was evaluated in the same manner as in Example 1 for appearance evaluation, visibility evaluation, surface resistance value evaluation, and abrasion resistance evaluation. The results are summarized in Table 1.
- Comparative Example 3 Using the same polycarbonate resin “SD POLYCA CF5101VJ” as in Example 1, the container body shown in FIGS. 13 to 13 was produced in the same manner as in Example 1.
- ABS resin (Santac UT-61" manufactured by Nippon A & L Co., Ltd.) and an injection molding machine "J450E-C5" manufactured by Japan Steel Works, Ltd.
- the ABS resin does not contain an antistatic agent and does not copolymerize methyl methacrylate.
- the haze measured in the same manner as in Example 1 exceeded 30%.
- the screw diameter of the injection molding machine is 76 mm.
- the molding conditions are as follows.
- Example 1 The misalignment of the container body and the cover was also formed in the same manner as in Example 1 using the same polycarbonate resin “SD POLYCA CF5101V” manufactured by Sumitomo Dow Co., Ltd. as used in Example 1.
- the molding conditions for the case body and the lid are the same as those for molding the body of Example 1.
- the obtained molded article was evaluated in the same manner as in Example 1 for appearance evaluation, visibility evaluation, surface resistance value evaluation, and abrasion resistance evaluation. The results are summarized in Table 1.
- Container PC Transparent ABS PBT PC PC Conductive cover Hydrophilic polymer Hydrophilic polymer Hydrophilic polymer Hydrophilic polymer None Carbon fiber material Body Ashine Carbon fiber Hydrophilic polymer Carbon powder Carbon fiber Carbon fiber Appearance evaluation A C A B A A Visibility evaluation A A A A C C
- the container body of Example 1 made of a polycarbonate resin composition containing carbon fiber has high hardness and elastic modulus and excellent scratch resistance.
- the transparent antistatic ABS resin composition as shown in Comparative Example 1 was used for the container body, the abrasion resistance was greatly reduced.
- a PBT resin composition containing carbon black was used as shown in Comparative Example 2, scratch resistance was reduced and dust was easily generated.
- the covers of Examples 1 and 2 have low surface resistance and excellent transparency, and do not contain an antistatic agent and do not contain a methyl methacrylate component as in Comparative Example 3.
- ABS resin has high surface resistance and poor transparency.
- the cover is a molded article in which the resin composition (A) and the resin composition (B) are combined, and the portion that comes into contact with the container body is made of the resin composition (A). This shows that a container having excellent visibility and extremely excellent scratch resistance can be provided.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Packaging Frangible Articles (AREA)
- Container, Conveyance, Adherence, Positioning, Of Wafer (AREA)
- Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
Abstract
Description
Claims
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JP2003-411715 | 2003-12-10 | ||
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JP (1) | JPWO2005057649A1 (ja) |
CN (1) | CN100555596C (ja) |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2008030756A (ja) * | 2006-07-26 | 2008-02-14 | Jsp Corp | ガラス基板搬送用ボックス及びガラス基板搬送用包装体 |
JP2014154592A (ja) * | 2013-02-05 | 2014-08-25 | Toppan Printing Co Ltd | 収納容器及び収納容器の製造方法 |
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US20220332912A1 (en) * | 2019-09-30 | 2022-10-20 | Asahi Kasei Kabushiki Kaisha | Container, accommodation device, and electrical component-accommodating body |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54124969A (en) * | 1978-03-22 | 1979-09-28 | Daicel Ltd | Semiconductor wafer container |
JPS61195059U (ja) * | 1985-05-28 | 1986-12-04 | ||
JPH057680U (ja) * | 1991-02-19 | 1993-02-02 | 新亜産業株式会社 | ウエーハ収納容器 |
JPH10245066A (ja) * | 1997-03-06 | 1998-09-14 | Komatsu Kasei Kk | 合成樹脂製容器の密閉構造と密閉用ガスケット |
JP2000306988A (ja) * | 1999-04-20 | 2000-11-02 | Shin Etsu Polymer Co Ltd | 基板収納容器 |
JP2002305239A (ja) * | 2001-04-06 | 2002-10-18 | Shin Etsu Polymer Co Ltd | 基板収納容器及びその製造方法 |
-
2004
- 2004-12-08 TW TW93137880A patent/TWI336677B/zh active
- 2004-12-08 WO PCT/JP2004/018268 patent/WO2005057649A1/ja active Application Filing
- 2004-12-08 CN CNB2004800369379A patent/CN100555596C/zh active Active
- 2004-12-08 JP JP2005516132A patent/JPWO2005057649A1/ja active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54124969A (en) * | 1978-03-22 | 1979-09-28 | Daicel Ltd | Semiconductor wafer container |
JPS61195059U (ja) * | 1985-05-28 | 1986-12-04 | ||
JPH057680U (ja) * | 1991-02-19 | 1993-02-02 | 新亜産業株式会社 | ウエーハ収納容器 |
JPH10245066A (ja) * | 1997-03-06 | 1998-09-14 | Komatsu Kasei Kk | 合成樹脂製容器の密閉構造と密閉用ガスケット |
JP2000306988A (ja) * | 1999-04-20 | 2000-11-02 | Shin Etsu Polymer Co Ltd | 基板収納容器 |
JP2002305239A (ja) * | 2001-04-06 | 2002-10-18 | Shin Etsu Polymer Co Ltd | 基板収納容器及びその製造方法 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008030756A (ja) * | 2006-07-26 | 2008-02-14 | Jsp Corp | ガラス基板搬送用ボックス及びガラス基板搬送用包装体 |
JP2014154592A (ja) * | 2013-02-05 | 2014-08-25 | Toppan Printing Co Ltd | 収納容器及び収納容器の製造方法 |
Also Published As
Publication number | Publication date |
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TWI336677B (en) | 2011-02-01 |
TW200530097A (en) | 2005-09-16 |
CN1890793A (zh) | 2007-01-03 |
CN100555596C (zh) | 2009-10-28 |
JPWO2005057649A1 (ja) | 2007-07-05 |
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