WO2005101456A1 - エキシマuvランプ用合成石英ガラス管およびその製造方法 - Google Patents
エキシマuvランプ用合成石英ガラス管およびその製造方法 Download PDFInfo
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- WO2005101456A1 WO2005101456A1 PCT/JP2004/005208 JP2004005208W WO2005101456A1 WO 2005101456 A1 WO2005101456 A1 WO 2005101456A1 JP 2004005208 W JP2004005208 W JP 2004005208W WO 2005101456 A1 WO2005101456 A1 WO 2005101456A1
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- quartz glass
- less
- synthetic quartz
- glass tube
- excimer
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Classifications
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/04—Re-forming tubes or rods
- C03B23/047—Re-forming tubes or rods by drawing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/30—Vessels; Containers
Definitions
- the present invention relates to a synthetic quartz glass tube that constitutes a light-transmitting portion of an excimer UV lamp that emits vacuum ultraviolet light having a wavelength of 150 to 250 nm.
- the synthetic quartz glass tube that constitutes the excimer UV lamp is required to have high dimensional accuracy in terms of discharge characteristics and luminous efficiency.However, in such a long quartz glass tube, a long quartz glass tube (over the entire length of the lamp) is required. The need for uniform discharge characteristics and luminous efficiency has led to more stringent requirements for dimensional accuracy.
- Japanese Unexamined Patent Publication No. 7-5731 discloses a high-purity silica glass for ultraviolet lamps and a method for producing the same.However, a quartz glass tube having a long dimension and high dimensional accuracy required for today's excimer UV lamps is disclosed. The conditions required for production are not limited to the date and time, but only synthetic silica glass tubes with a diameter of 30 marauders, a wall thickness of 2 mm, and a length of 200 marauders have been produced. Disclosure of the invention
- an object of the present invention is to provide a long and highly dimensional accurate quartz glass tube required for today's excimer UV lamps, and a method of manufacturing the same.
- the inventors of the present invention have been diligently studying impurities in a quartz glass tube in order to improve the UV lamp, and have found V as an impurity, and the concentration of this V has a predetermined value. If it exceeds, it has been found that it is not preferable because it absorbs ultraviolet rays and shifts the ultraviolet absorption end to a longer wavelength side to cause a decrease in transmittance.
- Another object of the present invention is to improve the concentration of impurities in order to improve the performance of an excimer UV lamp device. It is an object of the present invention to provide a synthetic quartz glass tube for an excimer UV lamp device that has the highest possible accuracy.
- a synthetic quartz glass tube made of high-purity synthetic quartz glass that emits vacuum ultraviolet light with a wavelength of 150 to 250 nm.
- the dimensions of the synthetic quartz glass tube are lOOOOmm or more and the outer diameter is 10mm or more and 50mm. Below 0.8mm or less and .8mm or less, the surface is free from scratches with a width of 0.5 or more or a length of 150 or more. The difference between the maximum and minimum outer diameters is 1.4 or less, preferably 0.7 or more.
- the difference between the maximum value and the minimum value of the wall thickness is 0.5 mm or less, preferably 0.3 mm or less, and the bending per 1000 mm length is 1.5 mm or less, preferably 0.7 mm or less.
- each element concentration of Li, Na, K, Ca, Mg, Ti, Fe, Ni, Cu, Cr, Mo, W, V is less than 5 wtppb, preferably each concentration of all the above elements is less than 3 wtppb,
- the spectral transmittance of the synthetic quartz glass tube having a wall thickness of 0.8 mm or more and 2.8 or less from the inner surface to the outer surface at a wavelength of 172 nm from the inner surface to the outer surface is 80% or more, preferably 83% or more.
- Synthetic quartz glass tubes for excimer UV lamps to produce excimer UV lamp synthetic quartz glass tubes with a bend of less than 5 mm, preferably 0.3 mm or less, and 1.5 mm or less, preferably 0.7 mm or less per length lOOmra.
- Internal pressure inside the pipe so that For excimer UV lamps characterized by producing tubes and extruding synthetic quartz glass tubes for excimer UV lamps while maintaining the tube drawing speed within 5% of each soil from the set value. Manufacturing method of synthetic quartz glass tube.
- Each element concentration of Li, Na, K, Ca, Mg, Ti, Fe, Ni, Cu, Cr, Mo, W, V is less than 5 wtppb, preferably each concentration of all the above elements is less than 3 wtppb 5.
- Japanese Patent Application Laid-Open No. 07-10913 discloses a quartz glass tube and a method for producing the quartz glass tube.
- the quartz glass tube is used for drawing an optical fiber and has an outer diameter. It is as large as 50 to 300 mm and has a thickness of 10 mm or more, and is completely different in technical field from the synthetic quartz glass tube for the excimer UV lamp device of the present invention.
- FIG. 1 is a diagram for explaining an outline of an excimer UV lamp obtained according to an example of the present invention and a performance test of a synthetic quartz glass tube used therein.
- FIG. 2 is a diagram for explaining a method of manufacturing a synthetic quartz glass tube for an excimer UV lamp according to an embodiment of the present invention.
- a synthetic quartz glass tube for an excimer UV lamp according to an embodiment of the present invention is for an excimer UV lamp that emits vacuum ultraviolet light having a wavelength of 150 to 250 nm, and is made of high-purity synthetic quartz glass.
- Glass tube dimension is 1000I 1 or more, outer diameter 10mm or more and 50MI or less, wall thickness 0.8mm or more and 2.8mm or less.
- the dimensional length of the synthetic quartz glass tube is less than the above, it is impossible to cope with an increase in the size of the cleaning device.
- the upper limit of the length is about 5000mm.
- the strength of the lamp tube may be insufficient, and if it exceeds the above, sufficient light transmittance cannot be obtained.
- Synthetic quartz glass tubes for excimer UV lamps have no scratches on the surface with a width of 0.5 band or more or a length of 150 recitations or more, and the difference between the maximum and minimum outer diameters is 1.4 band or less, preferably 0.7 synthetic quartz glass with a difference between the maximum and minimum wall thickness of 0.5 mm or less, preferably 0.3 mm or less, and a bend per lOOOOmm of 1.5 iM or less, preferably 0.7 or less Tubes are preferred. If there is a scratch with a width of 0.5 mm or more or a length of 150 mm or more, the excimer UV light may be scattered or the lamp itself may be damaged.
- the difference between the maximum value and the minimum value of the outer diameter is larger than 1.4 mm, the discharge will not be performed evenly because the distance between the internal electrodes varies when an excimer UV lamp is constructed. If it is smaller than 0.001 mm, the yield will decrease, which is not desirable in terms of cost. Similarly, even if the difference between the maximum value and the minimum value of the wall thickness is greater than 0.5 bandages, and the bend per 1000 mm length exceeds 1.5 ram, it has a double pipe structure. When an excimer UV lamp is constructed, there is a possibility that the discharge characteristics between the electrodes provided on the outside of the outer tube and on the inside of the inner tube may be deteriorated. In any case, it is not preferable from the viewpoint of cost to reduce the yield if it is smaller than 0.001 mm because the yield is reduced.
- the synthetic quartz glass tube has a concentration of each element of Li, Na, K, Ca, Mg, Ti, Cr, Fe, Ni, Cu, Mo, W and V of less than 5 wtppb, preferably each concentration of all the above elements. Is preferably less than 3 wtppb, and more preferably each concentration of all the above elements is less than lwtppb.
- Alkali metal elements and alkaline earth metal elements such as Li, Na, K, and Ca are included in building materials of factories, etc.If they are more than the above range, recrystallization of quartz glass is promoted and cristonolite is generated. And white devitrification occurs.
- transition metal elements such as Ti, Cr, Fe, Ni, Cu, Mo, and W are often contained in heat-resistant alloys used in equipment for manufacturing synthetic quartz glass, but their concentrations fall within the above range. Exceeding the above range absorbs ultraviolet light and shifts the ultraviolet absorption end to the longer wavelength side, causing a decrease in transmittance. This is undesirable because it causes the transmittance to decrease. However, reducing the concentration of any of the elements to less than O. Olwtppb is not desirable because all production processes require a clean production environment equivalent to that of a clean room, which increases costs. Note that V, which is an impurity, was first discovered by the present inventors at the time of the present invention.
- the synthetic quartz glass tube having a wall thickness of 0.8 mm or more and 2.8 mm or less has a spectral transmittance at the initial wavelength of 172 nm from the inner surface to the outer surface of 8 mm or more, preferably 83! Mm or more, and a 0H group concentration of lOwtppm or more and 400 wtppm or less. It is preferable that the concentration is 190 wtppm or more and 320 wtppm or less, and the C1 element concentration is 30 wtppm or less, preferably 5 wtppm or less.
- the 0H group is the terminal end of the structure in the quartz glass network structure, but if this 0H group is contained in the quartz glass in an appropriate amount, the internal strain in the network structure is relaxed, and the Si- 0 -Si bond angle is stabilized. It is said that the average binding energy of Si-0 increases as the value approaches. However, when the 0H group is contained in a high concentration, the transmittance in the ultraviolet region decreases. Therefore, in the synthetic quartz glass tube of the present invention, the 0H group concentration is set in the range of lOwtppm or more and 400wtppm or less.
- the Si-Cl formed by the C1 element is a precursor of the absorption band of 210 to n0 nm, so-called E 'center.
- the concentration of the C1 element is 30 wtppm or less, preferably 5 wtppm or less, the decrease in transmittance is hardly a problem. . It need not be less than O.Olwtppm.
- a long synthetic quartz glass tube for an excimer UV lamp of the present invention is manufactured by cutting and polishing a cylindrical quartz glass ingot.
- the variation range of the thickness of the cylindrical quartz glass cylinder is 1.8% or less, the surface roughness is about 18m or less, and the internal pressure of the pipe is adjusted to a predetermined diameter and thickness by the non-contact heating and stretching method. Manufacture while keeping the pipe drawing speed correctly and constant. Unless the variation width of the wall thickness of the cylindrical quartz glass cylinder, which is the original tube, is not less than 1.8, the difference between the maximum value and the minimum value of the outer diameter and the maximum value of the wall thickness when the synthetic quartz glass tube is manufactured minimum value The surface roughness is not less than 18 ⁇ and the width of the surface is not less than 0.5 mm even if the pipe is drawn by the non-contact heating and stretching method. Scratches with a length of more than 150mm may remain.
- the variation rate of the wall thickness of the cylindrical quartz glass cylinder, which is the original tube, is defined by the following equation.
- Fluctuation rate (%) (maximum thickness / minimum thickness) / ⁇ (maximum thickness + minimum thickness) / 2 ⁇ X 100
- the gas phase method (VAD method) or the external method (0VD Method) etc. a cylindrical quartz glass ingot is precisely ground to a predetermined size with a cylindrical grinding device equipped with diamond abrasive grains, then polished with a cerium oxide polishing device, and sized with a non-contact laser type measuring device.
- the hole is opened with an ultra-precision honing device to match the center of the outer diameter, etching with hydrofluoric acid, washing with pure water, and drying are performed. It is possible to obtain a cylindrical quartz glass cylinder in which the centers of the outer circumference circle and the inner circumference circle coincide.
- the non-contact heating and drawing method using a cylindrical electric heating furnace the prescribed internal pressure and the drawing speed determined from the dimensions, thickness, glass viscosity during heating, drawing ratio, etc. of the above-mentioned cylindrical quartz glass cylinder are determined.
- Heat processing is performed while maintaining the set value of soil 5% accurately.
- the pressure inside the pipe is set in the range of 2 to 1/10 atmosphere, and the drawing speed is set in the range of 1 m to 60 m / min.
- the high-temperature heat treatment at this time also eliminates the roughness and scratches of the ground surface during mechanical grinding, a long quartz glass tube with a high dimensional accuracy and a smooth surface suitable for excimer UV lamp applications Can be manufactured.
- the pipe pressure is controlled using a precision pressure controller to maintain the pipe pressure and the pipe drawing speed accurately at 5% of the set value, respectively.
- the pipe drawing speed is controlled by a high-precision rotary motor. Control may be performed.
- the outer diameter is measured with a non-contact laser type measuring instrument at intervals of 50 mm for a quartz glass tube of a predetermined length, and the difference between the maximum value and the minimum value of the outer diameter on the circumference is determined.
- the wall thickness is measured with a non-contact laser measuring instrument at intervals of 50 bands on a quartz glass tube of the specified length, and the difference between the maximum and minimum wall thickness on the circumference is determined.
- the bend is A quartz glass tube of a predetermined length is rotated with a point of 50 mm from each end as a fulcrum, the maximum value and the minimum value of the displacement at the center of the tube are obtained with a non-contact laser complete measuring instrument, and the difference is reduced by one-half. Value.
- the bend per 1000 mm length is a value obtained by proportionally converting the value of the bend between fulcrums into a value per 1000 mm of the synthetic quartz glass tube.
- Transparent vitrification was performed at 160 CTC below to produce a cylindrical quartz glass ingot. Both ends of this cylindrical quartz glass ingot are cut, and the outer periphery is precisely ground to a predetermined size with a cylindrical grinding device equipped with diamond abrasive grains, and then polished with a cerium oxide polishing device and then with a non-contact laser type measuring device. The dimensions were adjusted and the center of the circle of the outer diameter was determined.
- Holes are drilled with an ultra-precision honing device to match the outer diameter of the circle, etched with hydrofluoric acid, rinsed with pure water, and dried to produce a quartz glass with a length of 3000 mm, an outer diameter of 200 mm, and an inner diameter of 50 mm. Cylinder number one was obtained. The thickness variation rate of this quartz glass cylinder was 1.6%, and the surface roughness was 17 m.
- the above quartz glass cylinder has a carbon cylindrical heating element as shown in Fig. 2.
- the temperature of the cylindrical heater was set to 2200, the lower end of the tube was sealed with a dummy tube, nitrogen gas was introduced from the upper end into the tube, and the pressure While maintaining the nitrogen gas pressure in the tube accurately by a controller, the film was drawn into a synthetic quartz glass tube with an outer diameter of 35 mm and a wall thickness of l mm at a constant drawing speed by a drawing roll. Fluctuations from the set values of the internal pressure in the pipe and the drawing speed during this stretching were 33 ⁇ 4 soil and ⁇ 2%, respectively.
- the obtained synthetic quartz glass tube was cut to a length of 1,500 mm, and the outer diameter, wall thickness, and displacement from the rotating shaft were measured using a non-contact laser type measuring instrument.
- the difference between the maximum and minimum values of the outer diameter was measured.
- the difference between the maximum and minimum wall thickness was 0.1 mm, and the bend was 0.6 mm. That is, the bending per 1,000 mm length was 0.43 ⁇ . No scratches with a width of 0.5MI or more or a length of 1501M1 or more were found on the surface.
- the impurity element concentration, the transmittance at a wavelength of 172 nm, the 0H group concentration, and the C1 element concentration of the obtained synthetic quartz glass tube were as shown in Table 1, respectively.
- a synthetic quartz glass tube with an outer diameter of 12 mm and a wall thickness of l mm was manufactured in the same manner as in (1).
- the obtained synthetic quartz glass tube was cut into a length of 1,500 mm, and the outer diameter, wall thickness, and displacement from the rotating shaft were measured with a non-contact laser complete measuring instrument.
- the difference between the values was 0.4 ram, and the difference between the maximum and minimum values of the wall thickness was 0.1 ⁇ .
- the bending was 0.6 mm. That is, the bending per 1,000 mm length was 0.43 mm. Also, no scratches with a width of 0.5 ram or more or a length of 150 mra or more were found on the surface.
- the impurity element concentration, the transmittance at a wavelength of 172 nm, the 0H group concentration, and the C 1 element concentration of the synthetic quartz glass tube were as shown in Table 1, respectively.
- a porous soot body was prepared by a gas phase method (VAD method) in which silicon tetrachloride vaporized on a rotating evening gate was flame-hydrolyzed in oxyhydrogen to deposit silica soot.
- VAD method gas phase method
- a synthetic quartz glass tube having an outer diameter of 35 mm and a wall thickness of imm in the same manner as in Example 1.
- the fluctuation rate of the thickness of the quartz glass cylinder during the production was 1.7%, and the surface roughness was 17 / _tm.
- the obtained synthetic quartz glass tube was cut to 1500 mm in length, and the outer diameter, wall thickness, and displacement from the rotating shaft were measured by a non-contact laser complete measuring instrument, and the difference between the maximum value and the minimum value of the outer diameter was found. 0.7 iM, the difference between the maximum and minimum wall thickness was 0.3 mm, and the bend was 1.1 mm. That is, the bending per 1000 mm length was 0.79 leakage. No scratches with a width of 0.5 ram or more or a length of 150 mm or more were found on the surface.
- the impurity element concentration, the transmittance at a wavelength of 172 nm, the 0H group concentration, and the C1 element concentration of the obtained synthetic quartz glass tube were as shown in Table 1, respectively.
- a synthetic quartz glass tube with an outer diameter of 12 mm and a wall thickness of 1 was manufactured in the same manner as in 1.
- the obtained synthetic quartz glass tube was cut to 1500 mm in length, and the outer diameter and the displacement from the rotating shaft were measured by a non-contact laser complete measuring instrument.
- the maximum and minimum values of the outer diameter were measured.
- the difference between the maximum and minimum wall thickness was 0.25 mm, and the bend was 1.1 mm. That is, the bending per 1000 mm length was 0.79 ii.
- no scratches with a width of 0.5 mm or more or a length of 150 marauders or more were found on the surface.
- the impurity element concentration, the transmittance at the wavelength of ⁇ 2, the 0-base concentration, and the C1 element concentration of the synthetic quartz glass tube were as shown in Table 1, respectively.
- a synthetic quartz glass tube with an outer diameter of 35 mm and a wall thickness of 1 was used in the same manner as in Example 1, except that the hole was opened with a honing device without aligning the center of the outer diameter of the cylindrical quartz glass ingot. Manufactured. The variation rate of the wall thickness of the quartz glass cylinder during manufacture was 5.2%, and the surface roughness was 32 m.
- the obtained synthetic quartz glass tube was cut into a length of 1,500 faces, and the outer diameter, wall thickness, and displacement from the rotating shaft were measured using a non-contact laser complete measuring instrument, and the maximum and minimum values of the outer diameter were measured.
- the difference was 1.7 mm, the difference between the maximum and minimum wall thickness was 0.4 mm, and the bend was 3.3 imn. That is, the bending per 1 000 mm length was 2.29 thighs.
- the impurity element concentration, the transmittance at a wavelength of 172 nm, the 0H group concentration, and the C1 element concentration of the synthetic quartz glass tube were as shown in Table 1, respectively.
- a synthetic quartz glass tube with an outer diameter of ⁇ ⁇ and a wall thickness of Irani was manufactured in the same manner as in 1.
- the obtained synthetic quartz glass tube was cut to a length of 1500 and the outer diameter, wall thickness, and displacement from the rotating shaft were measured with a non-contact laser type measuring instrument.
- the difference between the maximum and minimum wall thickness was 0.35 ram, and the bend was 3.2 mm. That is, the bending per 1 000 mm length was 2.29 mm.
- the impurity element concentration, the transmittance at a wavelength of 172 nm, the 0H group concentration, and the C1 element concentration of the synthetic quartz glass tube were as shown in Table 1, respectively.
- the synthetic quartz glass tube obtained in (1) was used as the outer tube, and the synthetic quartz glass tube in (2) was used as the inner tube to constitute the electrode section and filled with xenon gas to form an excimer UV lamp with a total length of 1400 mm as shown in Fig. 1.
- This lamp was connected to the high-frequency power supply device shown in FIG. 1, a predetermined voltage was applied, the lamp was turned on, and the emission light intensity at a wavelength of 172 nm on the lamp surface after 100 hours was measured. The measurement was made at a position of A) 80 mm, B) the center of the lamp, and C) 1320 mm from the end of one light emitting part toward the other end.
- the intensity of the radiated light at each position was expressed as a relative intensity when the intensity at the position of B) in Example 1 was set to 100, the result showed that the value greatly changed depending on the measurement position as shown in Table I.
- Example 1 Except that the tube was drawn without controlling the nitrogen gas pressure in the synthetic quartz glass cylinder and without keeping the tube drawing speed constant, the same method as in Example 1 was used. A synthetic quartz glass tube with a diameter of 35 mm and a wall thickness of lmra was manufactured. Fluctuations from the set values of the internal pressure in the tube and the drawing speed during the stretching were ⁇ 7% and ⁇ 6! 3 ⁇ 4, respectively. The obtained synthetic quartz glass tube was cut into a length of 1500 ram, and the outer diameter, wall thickness, and displacement from the rotating shaft were measured using a non-contact laser complete measuring instrument.The difference between the maximum value and the minimum value of the outer diameter was measured.
- the impurity element concentration, the transmittance at a wavelength of 172 nm, the 0H group concentration, and the C1 element concentration of the synthetic quartz glass tube were as shown in Table 1, respectively.
- a synthetic quartz glass tube with an outer diameter of 12 mm and a wall thickness of 1 mm was manufactured in the same manner as in 1.
- the obtained synthetic quartz glass tube was cut into a length of 1500 mm, and the outer diameter, wall thickness, and displacement from the rotating shaft were measured using a non-contact laser type measuring instrument.
- the difference between the maximum value and the minimum value of the outer diameter was measured.
- the difference between the maximum and minimum wall thickness was 0.4 nim
- the bend was 3. lmm. That is, the bending per 1,000 strokes was 2.29mm.
- the impurity element concentration, the transmittance at a wavelength of 172 mn, the 0H group concentration, and the C1 element concentration of the synthetic glass tube were as shown in Table 1, respectively.
- the synthetic quartz glass tube obtained in (1) is used as the outer tube, and the synthetic quartz glass tube in (2) is used as the inner tube to constitute the electrode section and filled with xenon gas.
- This lamp was connected to the high-frequency power supply device shown in Fig. 1, a predetermined voltage was applied, the lamp was turned on, and the intensity of radiated light having a wavelength of 172 nm on the lamp surface after 100 hours was measured. It was measured at the position of A) 80imn, B) the center of the lamp and 01320mm from the end of one light emitting part to the other end.
- the intensity of the radiated light at each position is expressed as a relative intensity when the intensity at the position of B) in Example 1 is set to 100, the value changes greatly depending on the measurement position as shown in Table 2, and the intensity is not uniform. became.
- the obtained synthetic quartz glass tube was cut into a length of 1500 mm, and was cut with a non-contact laser type measuring instrument.
- the difference between the maximum and minimum outer diameters was 0.7 mm
- the difference between the maximum and minimum wall thicknesses was 0.4 mm
- bending was performed.
- the impurity element concentration, the transmittance at a wavelength of 172 nm, the 0H group concentration, and the C1 element concentration of the synthetic glass tube were as shown in Table 1, respectively.
- a synthetic quartz glass tube with an outer diameter of 12IM and a wall thickness of 1 mm was manufactured in the same manner as in (1).
- the obtained synthetic quartz glass tube was cut into a length of 1,500 strokes, and the outer diameter, wall thickness, and displacement from the rotating shaft were measured with a non-contact laser complete measuring instrument.
- the maximum and minimum values of the outer diameter were measured.
- the difference between the maximum and minimum wall thickness was 0.35 mm, and the bend was 1.5 mm. That is, the bending per 1,000 mm length was 1.07 mm.
- the impurity element concentration, the transmittance at a wavelength of 172 nm, the 0H group concentration, and the C1 element concentration of the synthetic glass tube were as shown in Table 1, respectively.
- the reason why the impurity concentration increased in this comparative example was that when drawing a synthetic quartz glass cylinder, instead of using the non-contact heating and drawing method, the synthetic quartz glass cylinder was made into graphite in a vertical resistance heating furnace. This is considered to be the result of pipe drawing using the contact heating processing method in which the guides are brought into direct contact.
- the synthetic quartz glass tube obtained in (1) is used as the outer tube, and the synthetic quartz glass tube in (2) is used as the inner tube to constitute the electrode section and filled with xenon gas.
- This lamp was connected to the high-frequency power supply device shown in FIG. 1, a predetermined voltage was applied, the lamp was turned on, and the emission light intensity at a wavelength of 172 nm on the lamp surface after 100 hours was measured. The measurement was made at a position of A) 80 mm, B) the center of the lamp, and C) 1320 mm from the end of one light emitting part toward the other end.
- the intensity of the radiated light at each position is expressed as a relative intensity when the intensity at the position of B) in Example 1 is set to 100, the value is significantly lower than that of Example 1 as shown in Table 2. It became.
- the synthetic quartz glass tube of the present invention is long and has high dimensional accuracy, when it is used to construct an excimer UV lamp having a double-tube structure, it takes up the entire length of the lamp. Thus, a long excimer UV lamp having uniform light emission characteristics can be manufactured. table 1
- Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Measurement Position A) B) C) A) B) C) A) B) C) A) B) C) A) B) C) A) B) C) A) B) C)
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JP2006512212A JPWO2005101456A1 (ja) | 2004-04-12 | 2004-04-12 | エキシマuvランプ用合成石英ガラス管およびその製造方法 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2015004103A1 (de) * | 2013-07-12 | 2015-01-15 | Heraeus Quarzglas Gmbh & Co. Kg | Verfahren zur herstellung eines quarzglas-grossrohres |
JP2018092014A (ja) * | 2016-12-05 | 2018-06-14 | セイコーエプソン株式会社 | 液晶装置、電子機器、液晶装置の製造方法、液晶装置用のマザー基板、および液晶装置用のマザー基板の製造方法 |
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WO2015004103A1 (de) * | 2013-07-12 | 2015-01-15 | Heraeus Quarzglas Gmbh & Co. Kg | Verfahren zur herstellung eines quarzglas-grossrohres |
JP2018092014A (ja) * | 2016-12-05 | 2018-06-14 | セイコーエプソン株式会社 | 液晶装置、電子機器、液晶装置の製造方法、液晶装置用のマザー基板、および液晶装置用のマザー基板の製造方法 |
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