Source: https://patents.google.com/patent/US7666260B2/en
Timestamp: 2018-10-16 20:05:09
Document Index: 248116740

Matched Legal Cases: ['art 130', 'art 150', 'art 130', 'art 150', 'art 130', 'art 150', 'art 150', 'art 130', 'art 150', 'art 160', 'art 130', 'art 160', 'art 130', 'art 160', 'art 150', 'art 130', 'art 150', 'art 150', 'art 130', 'art 150', 'art 150', 'art 130', 'art 150', 'art 170', 'art 130', 'art 170', 'art 130', 'art 170', 'art 180', 'art 130', 'art 190', 'art 130', 'art 220', 'art 220', 'art 220', 'art 230', 'art 230', 'art 330', 'art 430', 'art 530']

US7666260B2 - Vaporizer and semiconductor processing apparatus - Google Patents
Vaporizer and semiconductor processing apparatus Download PDF
US7666260B2
US7666260B2 US10556355 US55635504A US7666260B2 US 7666260 B2 US7666260 B2 US 7666260B2 US 10556355 US10556355 US 10556355 US 55635504 A US55635504 A US 55635504A US 7666260 B2 US7666260 B2 US 7666260B2
US10556355
US20070101940A1 (en )
A vaporizer includes a vaporizing chamber configured to vaporize a liquid material and thereby form a gas material. A spray portion is configured to spray the liquid material in the vaporizing chamber. A delivery part is configured to deliver the gas material from the vaporizing chamber to a gas outlet. A heating portion is configured to heat the vaporizer. The delivery part includes a filter member covering the gas outlet and configured to allow the gas material to pass therethrough. A shield plate is disposed to cover the filter member on a side farther from the gas outlet.
The present invention relates to a vaporizer for vaporizing a liquid material to generate a gas material, and a semiconductor processing apparatus employing a vaporizer. The term “semiconductor process” used herein includes various kinds of processes which are performed to manufacture a semiconductor device or a structure having wiring layers, electrodes, and the like to be connected to a semiconductor device, on a target substrate, such as a semiconductor wafer or a glass substrate used for an LCD (liquid crystal display) or FPD (flat panel display), by forming semiconductor layers, insulating layers, and conductive layers in predetermined patterns on the target substrate.
As exemplary techniques for forming thin films of semiconductor devices, CVD (chemical vapor deposition) methods are known. Where a capacitor is fabricated in a process of manufacturing a semiconductor device, it is required to form a dielectric thin film with a high dielectric constant and a low leakage current, which facilitates high integration of the device. In order to achieve this, a film formation technique employing an organic metal material as a source material is used to form the dielectric thin film.
An object of the present invention is to provide a vaporizer that can decrease mist and particles in a gas material.
FIG. 1 is a schematic sectional view showing the structure of a vaporizer according to a first embodiment of the present invention;
FIG. 1 is a schematic sectional view showing the structure of a vaporizer according to a first embodiment of the present invention. This vaporizer 100 includes a vaporizing chamber 110 that defines a vaporizing surface 110B and a vaporizing space 110A both correspond to a first vaporizing region. Spray means 120 is disposed to spray a liquid material within the vaporizing space 110A. A delivery part 130 corresponding to a second vaporizing region is detachably attached to the vaporizing chamber 110. A detection pipe 139 is disposed for a pressure gauge (capacitance manometer: not shown) to be connected thereto, so as to detect the pressure inside the vaporizing space 110A. A filter member 139 x is attached at a port of the vaporizing chamber 110 connected to the pipe 139. The filter member 139 x prevents mist and substances from entering the pressure gauge. The filter member 139 x is closely fixed to the port rim by an attachment member 139 y.
The vaporizing chamber 110 has a casing wall 111, and heating means 112, such as heater, embedded in the casing wall 111. The casing wall 111 has a port 111 a for the spray means 120 to be connected thereto. The spray means 120 includes a source material supply pipe 121 for supplying a source material or liquid material, which consists of an organic metal source material, or which has been prepared by dissolving an organic metal source material in a solvent. The spray means 120 further includes a spray gas supply pipe 122 for supplying a spray gas, such as argon gas, (Ar, or, e.g., Ne or N2), and a spray nozzle 123 for spraying the source material as mist. The spray nozzle 123 is configured to spray the source material (liquid, such as an organic metal material) and spray gas from individual fine ports, so as to atomize the material.
A filter member 133 is disposed inside the internal space 131SO to cover a delivery port (gas outlet) 131A connected to the feed line 141. The filter member 133 may be formed of an air permeable filter plate. For example, the filter member may be formed of a porous material, a filter plate with a number of fine holes, a material consisting of packed fibers, or a mesh material. More specifically, the filter material may be a non-woven or sintered body formed of packed metal fibers (for example, stainless steel fibers), which can withstand a high temperature (for example, it is within a range of about 180° C. to 350° C. and suitably set in accordance with the evaporation temperature and decomposition temperature of the source material). For example, the metal fibers have a diameter of about 0.1 to 3.0 mm. Particularly, it is preferable to use a sintered material prepared by sintering granular bodies, such as spherical bodies, having a high thermal conductivity. The granular bodies may be made of a material selected from the group consisting of non-metal materials, such as a ceramic and quartz; stainless steel; nonferrous metal materials, such as aluminum, titanium, and nickel; and alloys of these materials. These matters concerning the structure and material of the filter member are common to the following embodiments.
In this embodiment, the source material is supplied through the source material supply pipe 121 and sprayed from the spray nozzle 123 into the vaporizing space 110A. Part of the mist of the source material thus sprayed is vaporized while flying, and other part arrives at the inner surface of the casing wall 111 heated by the heating means 112, and is heated and vaporized thereon. In order to vaporize the source material, the vaporizing chamber 110, particularly the inner surface of the casing wall 111, is heated by the heating means 112 to a temperature within a range from a value lower than the decomposition temperature of the source material to a value higher than the evaporation temperature of the source material. This temperature is set to be within a range of, e.g., about 100 to 350° C.
In this embodiment, the shield plate 134 is heated by heat transferred through the heat transfer portions 135 and 137. Accordingly, when the source material mist within the vaporizing chamber 110A comes into direct contact with the shield plate 134, the mist is vaporized also on the surface of the shield plate 134. However, when the mist is vaporized on the shield plate 134, the vaporization heat thereof decreases the temperature of the shield plate 134. This decrease in the temperature of the shield plate 134 changes with change in the amount of mist coming into contact with shield plate 134, which depends on the amount of sprayed liquid material. In general, the temperature of the shield plate 134 becomes about 5 to 15° C. lower than the set temperature of the vaporizing chamber 110.
FIGS. 3A and 3B are a schematic inner side view and a schematic sectional side view, respectively, showing the main structure of a vaporizer according to a second embodiment of the present invention. FIGS. 3A and 3B show a delivery part 150 usable in place of the delivery part 130 of the vaporizer shown in FIG. 1. The other portions of the second embodiment are the same as those of the first embodiment.
FIGS. 4A and 4B are a schematic inner side view and a schematic sectional side view, respectively, showing the main structure of a vaporizer according to a third embodiment of the present invention. FIGS. 4A and 4B show a delivery part 150′ usable in place of the delivery part 130 of the vaporizer shown in FIG. 1. The other portions of the third embodiment are the same as those of the first embodiment. Portions of the delivery part 150′ the same as those of the second embodiment are denoted by the same reference numerals.
FIGS. 5A and 5B are a schematic inner side view and a schematic sectional side view, respectively, showing the main structure of a vaporizer according to a fourth embodiment of the present invention. FIGS. 5A and 5B show a delivery part 150″ usable in place of the delivery part 130 of the vaporizer shown in FIG. 1. The other portions of the fourth embodiment are the same as those of the first embodiment. Portions of the delivery part 150″ the same as those of the second embodiment are denoted by the same reference numerals.
FIGS. 6A and 6B are a schematic inner side view and a schematic sectional side view, respectively, showing the main structure of a vaporizer according to a fifth embodiment of the present invention. FIGS. 6A and 6B show a delivery part 160 usable in place of the delivery part 130 of the vaporizer shown in FIG. 1. The other portions of the fifth embodiment are the same as those of the first embodiment.
FIGS. 7A and 7B are a schematic inner side view and a schematic sectional side view, respectively, showing the main structure of a vaporizer according to a sixth embodiment of the present invention. FIGS. 7A and 7B show a delivery part 160′ usable in place of the delivery part 130 of the vaporizer shown in FIG. 1. The other portions of the sixth embodiment are the same as those of the first embodiment. Portions of the delivery part 160′ the same as those of the fifth embodiment are denoted by the same reference numerals.
FIGS. 8A and 8B are a schematic inner side view and a schematic sectional side view, respectively, showing the main structure of a vaporizer according to a seventh embodiment of the present invention. FIGS. 8A and 8B show a delivery part 150X usable in place of the delivery part 130 of the vaporizer shown in FIG. 1. The other portions of the seventh embodiment are the same as those of the first embodiment. Portions of the delivery part 150X the same as those of the second embodiment are denoted by the same reference numerals.
FIGS. 9A and 9B are a schematic inner side view and a schematic sectional side view, respectively, showing the main structure of a vaporizer according to an eighth embodiment of the present invention. FIGS. 9A and 9B show a delivery part 150Y usable in place of the delivery part 130 of the vaporizer shown in FIG. 1. The other portions of the eighth embodiment are the same as those of the first embodiment. Portions of the delivery part 150Y the same as those of the second embodiment are denoted by the same reference numerals.
FIGS. 10A and 10B are a schematic inner side view and a schematic sectional side view, respectively, showing the main structure of a vaporizer according to a ninth embodiment of the present invention. FIGS. 10A and 10B show a delivery part 150Z usable in place of the delivery part 130 of the vaporizer shown in FIG. 1. The other portions of the ninth embodiment are the same as those of the first embodiment. Portions of the delivery part 150Z the same as those of the second embodiment are denoted by the same reference numerals.
FIGS. 11A and 11B are a schematic inner side view and a schematic sectional side view, respectively, showing the main structure of a vaporizer according to a tenth embodiment of the present invention. FIGS. 11A and 11B show a delivery part 170 usable in place of the delivery part 130 of the vaporizer shown in FIG. 1. The other portions of the tenth embodiment are the same as those of the first embodiment.
FIGS. 12A and 12B are a schematic inner side view and a schematic sectional side view, respectively, showing the main structure of a vaporizer according to an eleventh embodiment of the present invention. FIGS. 12A and 12B show a delivery part 170′ usable in place of the delivery part 130 of the vaporizer shown in FIG. 1. The other portions of the eleventh embodiment are the same as those of the first embodiment. Portions of the delivery part 170′ the same as those of the tenth embodiment are denoted by the same reference numerals.
In this embodiment, an annular filter member 173 is disposed inside the internal space 170A′. The peripheral portion of the filter member 173 is fixed to the inner surface of the sidewall 171′. At positions other than the peripheral portion, the filter member 173 is in thermal contact with columnar heat transfer portions 171 p′ protruding from the sidewall 171′ and columnar heat transfer portions 172 p′ protruding from the plate member 172′. The filter member 173 is sandwiched between the heat transfer portions 171 p′ and 172 p′.
In this embodiment, other heating means 172″ is also embedded in the sidewall 171′ (in reception holes 171 a′). The filter member 173 is arranged to receive heat from both of the heating portion 172H of the plate member 172′ and the heating means 172″ through the heat transfer portions 171 p′ and 172 p′. Accordingly, the filter member 173 can receive a large amount of heat through the heat transfer portions. With this arrangement, the vaporization efficiency can be increased, while the filter member removes residual mist and solid substances, such as particles.
FIGS. 13A and 13B are a schematic inner side view and a schematic sectional side view, respectively, showing the main structure of a vaporizer according to a twelfth embodiment of the present invention. FIGS. 13A and 13B show a delivery part 180 usable in place of the delivery part 130 of the vaporizer shown in FIG. 1. The other portions of the twelfth embodiment are the same as those of the first embodiment.
A shield plate 184 is disposed at a position of the internal space 180A facing the vaporizing chamber (inner side from the filter member 183). The shield plate 184 is in thermal contact with the filter member 183 through spacers 186, and is fixed to the heat transfer portions 185 by setscrews 186 a.
The shield plate 184 is separated from the sidewall 181 around it with a gap that serves as a communication clearance 180B.
FIGS. 14A and 14B are a schematic inner side view and a schematic sectional side view, respectively, showing the main structure of a vaporizer according to a thirteenth embodiment of the present invention. FIGS. 14A and 14B show a delivery part 190 usable in place of the delivery part 130 of the vaporizer shown in FIG. 1. The other portions of the thirteenth embodiment are the same as those of the first embodiment.
FIG. 15 is a schematic sectional side view showing a vaporizer according to a fourteenth embodiment of the present invention. FIG. 16 is a sectional plan view showing the vaporizer according to the fourteenth embodiment, taken along the line A-A in FIG. 15. The vaporizer according to this embodiment has a vaporizing chamber 210 forming a vaporizing surface 210B and a vaporizing space 210A, as in the first embodiment. A spray means 120 is disposed to spray a liquid material within the vaporizing space 210A. A delivery part 220 serving as a second vaporizing region is detachably attached to the vaporizing chamber 210. The structure of the spray means 120 (a source material supply pipe 121, a spray gas supply pipe 122, and a spray nozzle 123), the sidewall 211, and heating means 212 of the vaporizing chamber 210 are the same as those of the first embodiment. The delivery part 220 includes a sidewall 221, heating means 222, a filter member 223, a shield plate 224, heat transfer portions 225, spacers 226, and setscrews 226 a, which have the same functions as those of the first embodiment. An internal space 220A formed in the delivery part 220, a communication clearance 220B formed around the shield plate 224, and a delivery passage 220S are arranged in the same manners as those of the first embodiment.
FIG. 17A is a schematic sectional side view showing a vaporizer according to a fifteenth embodiment of the present invention. The portions of the fifteenth embodiment other than a delivery part 230 are the same as those of the first embodiment. The delivery part 230 includes a sidewall 231, a honeycomb filter member 232 disposed between the sidewall 231 and vaporizing space 110A, and heating means 233, such as a heater embedded in the filter member 232. A gas material delivery passage 231 a is connected to the sidewall 231 to deliver a gas material into a feed line. Heating means for heating the sidewall 231 may be separately disposed to prevent a gas having passed through the filter member 232 from decreasing the temperature. This heating means may be disposed inside the sidewall 231 or on the outer surface thereof.
The filter member 232 is a plate made of a metal having a good thermal conductivity (for example, stainless steel), or a ceramic, such as AlN or SiC. The filter member 232 has a reception through hole (or reception hole, hereinafter) 232 a formed therein and extending in a direction across (“perpendicular to” in the example shown in the figure) the flow direction of the gas material (in the direction toward right in the figure). The heating means 233 is inserted in the reception hole 232 a. The heating means 233 may be configured to be present over the entirety inside the filter member 232. In this case, the thermal efficiency is further improved. The filter member 232 further has a number of fine holes 232 b penetrating therethrough in a direction essentially parallel with the flow direction of the gas material. The fine holes 232 b may be formed essentially perpendicular to the flow direction of the gas material, so that residual mist and solid substances come into contact with the filter member and are re-vaporized thereon.
Some of the fine holes 232 b may be directed across the reception hole 232 a for the heating means 233. Alternatively, part of the fine holes 232 b may be omitted at the position intersecting with the reception hole 232 a.
FIG. 17B is a schematic sectional side view showing a vaporizer according to a sixteenth embodiment of the present invention. In the sixteenth embodiment, a filter member 234 is disposed between a sidewall 231 and a honeycomb filter member 232. The filter member 234 is connected and fixed to the sidewall 231 by fixing members 235. An inter-space 230D is formed between the filter member 232 and filter member 234 to expand all over these filters. The portions of the sixteenth embodiment other than the filter member 232 and heating means 233 are the same as those of the fifteenth embodiment shown in FIG. 17A.
FIG. 18A is a schematic sectional side view showing a vaporizer according to a seventeenth embodiment of the present invention. The portions of the seventeenth embodiment other than a delivery part 330 are the same as those of the first embodiment.
FIG. 18A is a schematic sectional side view showing a vaporizer according to an eighteenth embodiment of the present invention. This embodiment includes a delivery part 430, in which heating means 432 is embedded in a sidewall 431. A filter member 433 is disposed on the inner side of the sidewall 431. At positions other than the peripheral portion, the filter member 433 is in thermal contact with heat transfer portions 434 (spacers), which protrude from the sidewall 431. The heat transfer portions 434 are connected and fixed to both of the filter member 433 and sidewall 431. Specifically, the filter member 433 is fixed to the heat transfer portions 434 and sidewall 431 by fixing means 434 a. Thus, the heat transfer portions 434 also serve as support members for supporting the filter member 433. Also in this case, the filter member 434 is preferably controlled to be heated at the same temperature as the vaporizing surface (inner surface) of the vaporizing chamber.
FIG. 19 is a schematic sectional side view showing a vaporizer according to a nineteenth embodiment of the present invention. In this embodiment, the vaporizer 500 includes a source material vaporizing section 510, spray means 520, and a delivery part 530. The source material vaporizing section 510 has a sidewall 511, a vaporizing surface 511A forming the inner surface of the sidewall 511, and heating means 512, such as a heater, embedded in the sidewall 511. The spray means 520 has a source material supply pipe 521, a spray gas supply pipe 522, and a spray nozzle 523.
According to the present invention, there is provided a vaporizer that can decrease mist and particles in a gas material.
US10556355 2003-05-12 2004-05-11 Vaporizer and semiconductor processing apparatus Expired - Fee Related US7666260B2 (en)
JP2003132607 2003-05-12
JP2003-132607 2003-05-12
JP2004121290A JP4185015B2 (en) 2003-05-12 2004-04-16 Supply structure of the vaporized material, vaporizer and reaction device
JP2004-121290 2004-04-16
PCT/JP2004/006609 WO2004100249A1 (en) 2003-05-12 2004-05-11 Vaporizer and semiconductor processing apparatus
US20070101940A1 true US20070101940A1 (en) 2007-05-10
US7666260B2 true US7666260B2 (en) 2010-02-23
ID=33436437
US10556355 Expired - Fee Related US7666260B2 (en) 2003-05-12 2004-05-11 Vaporizer and semiconductor processing apparatus
US (1) US7666260B2 (en)
EP (1) EP1630859B1 (en)
JP (1) JP4185015B2 (en)
KR (1) KR100691038B1 (en)
WO (1) WO2004100249A1 (en)
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US20070101940A1 (en) 2007-05-10 application
KR100691038B1 (en) 2007-03-12 grant
KR20050075420A (en) 2005-07-20 application
EP1630859A1 (en) 2006-03-01 application
EP1630859A4 (en) 2009-08-26 application
EP1630859B1 (en) 2011-07-13 grant
JP4185015B2 (en) 2008-11-19 grant
JP2004363562A (en) 2004-12-24 application
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