Source: https://patents.google.com/patent/KR101236108B1/en
Timestamp: 2020-07-06 13:03:19
Document Index: 69391560

Matched Legal Cases: ['art 80', 'art 80', 'art 19', 'art 80', 'art 80', 'art 19', 'art 31', 'art 31', 'art 19', 'art 31', 'art 31', 'art 48', 'art 80', 'art 80', 'art 119']

KR101236108B1 - Substrate processing apparatus and method of manufacturing semiconductor device - Google Patents
KR101236108B1
KR101236108B1 KR1020110017384A KR20110017384A KR101236108B1 KR 101236108 B1 KR101236108 B1 KR 101236108B1 KR 1020110017384 A KR1020110017384 A KR 1020110017384A KR 20110017384 A KR20110017384 A KR 20110017384A KR 101236108 B1 KR101236108 B1 KR 101236108B1
KR1020110017384A
KR20110098680A (en
가즈유끼 도요다
오사무 가사하라
요시로 히로세
히로유끼 다까데라
다이기 가미무라
2010-02-26 Priority to JP2010041576 priority Critical
2010-02-26 Priority to JPJP-P-2010-041576 priority
2010-03-24 Priority to JP2010067880 priority
2010-03-24 Priority to JPJP-P-2010-067880 priority
2011-01-05 Priority to JPJP-P-2011-000515 priority
2011-01-05 Priority to JP2011000515A priority patent/JP5812606B2/en
2011-02-25 Application filed by 가부시키가이샤 히다치 고쿠사이 덴키 filed Critical 가부시키가이샤 히다치 고쿠사이 덴키
2011-09-01 Publication of KR20110098680A publication Critical patent/KR20110098680A/en
2013-02-21 Publication of KR101236108B1 publication Critical patent/KR101236108B1/en
Provided are a substrate processing apparatus and a semiconductor device manufacturing method capable of improving throughput while performing a dense substrate processing. The substrate processing apparatus is provided in a processing chamber and includes a substrate supporting part for supporting a substrate, a substrate supporting part moving mechanism for moving the substrate supporting part, a gas supply part for supplying gas to the processing chamber, and an exhaust part for exhausting gas from the processing chamber. And a plasma generation unit provided to face the substrate support.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a substrate processing apparatus and a method of manufacturing a semiconductor device,
TECHNICAL FIELD This invention relates to the substrate processing apparatus and semiconductor device manufacturing method which form a thin film on a board | substrate, or modify the film | membrane formed.
As a so-called placement apparatus which processes a plurality of substrates in a batch, a vertical substrate processing apparatus in which a plurality of substrates are stacked vertically and processed in a batch is mentioned (Patent Document 1). Moreover, the board | substrate processing apparatus which mounts a board | substrate to the board | substrate support stand in a process chamber, and processes each sheet is mentioned (patent document 2).
[Patent Document 1] Japanese Patent Laid-Open No. 2006-156695 [Patent Document 2] Japanese Patent Laid-Open No. 11-288798
As a device which processes a board | substrate, there exists a sheet | leaf unit which processes one board | substrate. Since the sheet | seat sheet | leaf apparatus processes one by one, it is known that dense processing is possible. Moreover, in recent years when the enlargement of a board | substrate is considered, processing from a sheet | leaf apparatus is examined rather than the arrangement | positioning apparatus which stacks and processes a some board | substrate from a viewpoint of a mechanical strength.
However, since the sheet is processed one by one, there is a problem that the throughput is low.
An object of the present invention is to provide a substrate processing apparatus and a manufacturing method of a semiconductor device which can improve throughput while performing a dense substrate processing in a substrate processing apparatus.
Typical examples of the means for solving the above problems are as follows.
A substrate support part provided in the processing chamber and supporting the substrate, a substrate support part moving mechanism for moving the substrate support part, a gas supply part for supplying gas to the processing chamber, an exhaust part for exhausting gas from the processing chamber, and the substrate support part And a plasma generating unit provided so as to face the surface.
In addition, it is as follows.
A plurality of substrate support portions provided in the processing chamber for supporting the substrate, a substrate support portion moving mechanism for moving the substrate support portion, a gas supply portion for supplying gas to the processing chamber, an exhaust portion for exhausting gas from the processing chamber, and A method of manufacturing a semiconductor device using a substrate processing apparatus having a plasma generating portion provided to face a substrate support portion, the method comprising: a gas supply / exhaust step of exhausting gas from the exhaust portion while supplying gas from the gas supply portion; The manufacturing method of the semiconductor device which has a movement process which moves a plurality of said board | substrate support parts to a base.
According to this substrate processing apparatus and the manufacturing method of a semiconductor device, processing throughput can be improved, enabling the compact processing of the sheet | leaf process apparatus.
BRIEF DESCRIPTION OF THE DRAWINGS The top view which shows the substrate processing apparatus which is 1st Embodiment of this invention.
2 is a partially cutaway perspective view thereof.
3 is a partially omitted side cross-sectional view thereof.
4 is a partially omitted side cross-sectional view showing a substrate processing apparatus according to a second embodiment of the present invention.
5 is a partially omitted side cross-sectional view showing a substrate processing apparatus according to a third embodiment of the present invention.
6 is a plan view showing a substrate processing apparatus according to a fourth embodiment of the present invention.
7 is a side view and a top view of a substrate processing apparatus according to a fourth embodiment of the present invention.
8 is an enlarged view of a shower head according to a fourth embodiment of the present invention.
9 is an explanatory diagram when a wafer is placed in a fourth embodiment of the present invention.
10 is an explanatory diagram for explaining an exhaust unit of the substrate processing apparatus according to the fourth embodiment of the present invention.
11 is an explanatory diagram for explaining a gas flow in the substrate processing apparatus according to the fourth embodiment of the present invention.
12 is a side view and a top view of a substrate processing apparatus according to a fifth embodiment of the present invention.
FIG. 13 is an explanatory diagram for explaining a plasma generation source and its surroundings according to the fifth embodiment of the present invention; FIG.
It is a top view which shows the substrate processing apparatus which is 6th Embodiment of this invention.
15 is a side view and a top view of a substrate processing apparatus as a comparative example.
16 is an explanatory diagram when a wafer is placed in a comparative example.
17 is an explanatory diagram for explaining an exhaust portion of a substrate processing apparatus according to a comparative example.
EMBODIMENT OF THE INVENTION Hereinafter, 1st Embodiment which concerns on this invention is described based on drawing.
1 to 3 show a first embodiment of the present invention.
In this embodiment, the substrate processing apparatus 10 according to the present invention is a semiconductor wafer (hereinafter referred to as wafer 18) as a substrate on which a semiconductor device is formed in a method of manufacturing a semiconductor integrated circuit device (hereinafter referred to as a semiconductor device). It is configured as a substrate processing apparatus for performing a plasma treatment.
The substrate processing apparatus 10 according to the present embodiment includes a case 11 in which a processing chamber 12 is formed. The case 11 is formed in rectangular cylinder shape, and the cylinder hollow part forms the process chamber 12. As shown in FIG.
An inlet 13 is formed in the front wall of the case 11, and an outlet 14 is formed in the other wall of the case 11 facing the inlet 13. The inlet 13 is configured to be opened and closed by the gate 13A, and the outlet 14 is configured to be opened and closed by the gate 14A.
As shown in FIG. 1, the inlet side preliminary chamber 33 is connected to the wall having the inlet 13 of the case 11, and the outlet side preliminary chamber 34 is connected to the wall having the outlet 14, respectively. It is. Both preparatory chambers 33 and 34 are comprised so that pressure reduction is possible.
33 A of prechamber heaters are provided in the inlet side preliminary chamber 33, and it is set as the structure which heats the wafer 18 before entering the case 11. As shown in FIG. 34A of preliminary chamber cooling mechanisms are provided in the exit side preparatory chamber 34, and it is set as the structure which cools the wafer 18 heated in the case 11. As shown in FIG.
In addition, each spare room 33 and 34 is abbreviate | omitted in FIG. 2 for convenience of description.
The board | substrate processing apparatus 10 is provided with the control part 80, and the control part 80 controls each structure.
In the processing chamber 12, a conveyor 15 as a substrate support moving mechanism for arranging and moving a plurality of substrate holders 17 (substrate supports, which will be described later) at intervals horizontally over the entire length. It is laid.
The conveyor 15 is provided with the some rotating roller 16, and is comprised so that the board | substrate holding tool 17 which supported the wafer 18 as a moving (conveying) object by rotation of each roller 16 is comprised. have. The width of the conveyor 15 is set larger than the width of the substrate holder 17.
In addition, the process chamber 12 is set to the length which can convey and convey the board | substrate holder 17 of several sheets, for example, four sheets at the same pitch.
The substrate holder 17 is formed in a square flat plate shape, and its outer diameter is set larger than the diameter of the wafer 18. The substrate holder 17 accommodates the wafer 18 in a holding hole 17a formed in the substrate holder 17, which is buried in a surface not facing the roller 16 (hereinafter referred to as an upper surface). The wafer 18 is configured to be positioned and detachably held.
As shown in FIG. 1 and FIG. 2, a plurality of plasma generating apparatuses 20 having a pair of electrodes are provided on the ceiling wall of the case 11, in this embodiment, four units are conveyed and the conveyor 15 is conveyed. It is arrange | positioned by the same pitch as a direction (henceforth a front-back direction), respectively.
The plasma generating apparatus 20 has an electrode as described later, and turns the process gas supplied into the process chamber 12 into a plasma state by supplying electric power to the electrode.
The gas exhaust port 19a which exhausts the gas in the process chamber 12 is formed in the side wall of the process chamber 12, and the gas exhaust port 19a is provided so that the gas exhaust pipe 19b may be connected.
The gas exhaust pipe 19b is provided so as to correspond to each of the plurality of plasma generating apparatuses 20. The gas exhaust pipe 19b joins downstream, and the pressure control valve 19c and the vacuum pump 19d as an exhaust apparatus are provided in the order which joined the gas exhaust pipe 19b from the upstream in order, and this pressure By adjusting the opening degree of the adjustment valve 19c, the pressure in the process chamber 12 is adjusted to a predetermined value.
The gas exhaust part 19 is comprised of the gas exhaust port 19a, the gas exhaust pipe 19b, the pressure regulating valve 19c, and the vacuum pump 19d.
The pressure regulating valve 19c and the vacuum pump 19d are electrically connected to the control part 80, and are pressure-controlled by the control part 80. FIG.
In addition, the gas exhaust part 19 is abbreviate | omitted in FIG. 2 for convenience of description.
As shown in FIG. 3, the plasma generation apparatus 20 which concerns on this embodiment is equipped with the bracket 21 formed in the square frame shape using the insulating material. The bracket 21 is tightly fixed to the ceiling wall of the case 11, and the holder 22 is fitted into the frame of the bracket 21.
The holder 22 is formed in a square plate shape using a dielectric such as quartz (Si0 2 ). On the upper surface of the holder 22, a plurality of thin rectangular elongated grooves 22a (8 pairs in the illustrated example) are aligned at the same pitch in a direction that is directly in the direction of travel of the substrate holder 17. It is buried to a certain depth.
The plasma generating device 20 includes a comb-shaped electrode pair 23 as a pair of electrodes, and the comb-shaped electrode pair 23 includes a plurality of pairs of the anode electrode 24 and the cathode electrode 25 (in the example shown in FIG. 4). Joe). The anode electrode 24 and the cathode electrode 25 are each formed in the elongate rectangular flat plate shape, and are accommodated in the adjacent long groove | channel 22a, 22a, respectively. That is, each electrode 24 and 25 is provided so that it may go directly to the advancing direction of the wafer 18.
The plasma 30 is between the electrodes 24 and 25, and is generated in the stretching direction of these electrodes 24 and 25.
By arranging each of the electrodes 24 and 25 in a direction perpendicular to the advancing direction of the wafer 18, the generated plasma 30 scans the surface of the wafer 18. Therefore, the plasma 30 can be uniformly exposed on the wafer 18.
If the traveling direction of the wafer 18 and the electrodes 24 and 25 are parallel, since the plasma 30 is generated on the wafer 18 in parallel with the traveling direction, the film thickness becomes nonuniform.
The anode electrode 24 and the cathode electrode 25 respectively accommodated in the long grooves 22a and 22a are separated from the process chamber 12 by the bottom wall 22b of the long grooves 22a.
In this way, since the holder 22 made of a dielectric is provided between the comb-shaped electrode pair 23 and the processing chamber 12, the electrodes 24 and 25 are cut by the plasma 30 and are formed by metal pieces. Metal contamination can be prevented. At this time, the bottom wall 22b is thick enough to generate the plasma 30, and has a thickness that does not interfere with the formation of a thin film on the wafer 18.
A high frequency power supply 26 is connected to the plasma generating device 20, and the high frequency power supply 26 is connected to the comb-shaped electrode pair 23 through a matching unit 27 and an insulating transformer 28. That is, the high frequency power supply 26 is connected to the primary side of the insulated transformer 28 via the matcher 27, and the comb-shaped electrode pair 23 is connected to the secondary side of the insulated transformer 28. As shown in FIG. The plurality of sets of anode electrodes 24 and cathode electrodes 25 of the comb-shaped electrode pairs 23 are connected in parallel to the insulating transformer 28.
The high frequency power supply 26, the matching unit 27, and the insulating transformer 28 are stored in the switchboard 29 arranged on the ceiling wall of the case 11 (see FIGS. 1 and 2).
In addition, the plasma generating apparatus 20, the high frequency power supply 26, the matching unit 27, and the insulating transformer 28 are called plasma generating units.
In the present embodiment, the plasma generating units adjacent to the outlet 14 from the inlet 13 are respectively the first plasma generating unit, the second plasma generating unit, and the third plasma generating unit. It is called.
Similarly, the adjacent plasma generating apparatus from the inlet 13 toward the outlet 14 is divided into a first plasma generating apparatus, a second plasma generating apparatus, and a third plasma generating apparatus. It is called.
The surface of the bottom wall 22b that faces the wafer 18 is configured to be substantially parallel to the surface of the wafer 18. That is, the bottom wall 22b is comprised so that it may be substantially parallel with the conveyor 15. As shown in FIG. By setting it as such a shape, it becomes possible to expose the plasma 30 uniformly on the wafer 18 surface.
A gas supply port 31a is formed in the ceiling wall of the case 11, and one end of the gas supply pipe 31b is connected to the gas supply port 31a. The gas supply pipe 31b is provided with the gas supply source 31e, the flow rate control apparatus 31d which adjusts a gas flow volume, and the valve 31c which opens and closes a gas flow path in order from an upstream. By opening and closing the valve 31c, the gas is supplied from the gas supply pipe 31b into the processing chamber 12 or the supply is stopped.
The gas supply part 31 is comprised from the gas supply part 31a, the gas supply pipe 31b, the valve 31c, the flow control apparatus 31d, and the gas supply source 31e. The flow rate control device 31d and the valve 31c are electrically connected to the control unit 80, and are controlled by the control unit 80.
The heater 32 is provided in the bottom of the case 11, and this heater 32 heats the wafer 18 and the board | substrate holder 17 which are conveyed by the conveyor 15. As shown in FIG.
Next, the operation and effect of the substrate processing apparatus 10 according to the above structure are demonstrated. The operation of each configuration is controlled by the controller 80.
The substrate holder 17 on which the wafer 18 is mounted is carried into the entrance side preliminary chamber 33. In the inlet side preliminary chamber 33, the preliminary chamber heater 33A heats the substrate holder 17 and the wafer 18. At the same time as heating, the inside of the inlet side preliminary chamber 33 is made to be substantially the same pressure as the case 11.
In addition, the case 11 is maintained at a constant pressure by the cooperation of the gas exhaust part 19 and the gas supply part 31.
After the wafer 18 is heated to a predetermined temperature, the gate 13A is opened, and the substrate holder 17 is placed on the conveyor 15. After being placed, the gate 13A is closed, and the case 11 and the entrance preliminary chamber 33 are partitioned.
The first substrate holder 17 holding the wafer 18 in advance is carried in from the inlet 13 and placed on the conveyor 15. The substrate holder 17 placed on the conveyor 15 and the wafer 18 on the substrate holder 17 are heated by the heater 32 and maintained at a predetermined processing temperature.
The conveyor 15 so that the board | substrate holder 17 (1st board | substrate holder 17) to be processed initially may face the 1st plasma generation apparatus 20 (1st plasma generation apparatus 20). ) Conveys the first substrate holder 17 and stops.
In this state, as shown in FIG. 3, after the gas is supplied from the gas supply part 31, the plasma generating apparatus 20 generates the plasma 30 on the substrate holder 17, and the wafer ( 18) is subjected to plasma treatment.
At this time, the next 2nd board | substrate holder 17 waits in the entrance side preliminary chamber 33. As shown in FIG.
When the processing time set in advance passes, the 2nd board | substrate holder 17 is conveyed from the entrance side preliminary chamber 33 to the case 11. At this time, the distance between the first substrate holder 17 and the second substrate holder 17 is equal to the distance between the first plasma generator 20 and the second plasma generator 20, The second substrate holder 17 is placed on the conveyor.
The conveyor 15 conveys the first substrate holder 17 so as to face the second plasma generating apparatus. Moreover, the 1st board | substrate holder 17 and the 2nd board | substrate holder 17 are conveyed so that the 2nd board | substrate holder 17 may be in the state which opposes the 1st plasma generation apparatus 20. FIG.
At this time, the 3rd board | substrate holder 17 is mounted in the entrance side preliminary chamber 33. As shown in FIG.
In this manner, the substrate holder 17 is sequentially loaded, and the wafer 18 is plasma-processed under each plasma generating apparatus 20.
By sequentially processing under each plasma generating apparatus 20, it becomes possible to deposit a desired film thickness, for example.
The wafer 18 subjected to the plasma treatment by the plasma generating apparatus 20 closest to the outlet 14 is carried out from the case 11 as follows.
First, after the wafer 18 is processed by the plasma generating device 20 closest to the outlet 14 for a predetermined time, the gate 14A of the outlet 14 is opened. When opened, it is carried out to the exit side preparatory chamber 34 by the conveyance mechanism not shown. After carrying out, the gate 14A is closed.
In the exit side preliminary chamber 34, the conveyed substrate holder 17 is cooled by the preliminary chamber cooling mechanism 34A. At the same time, the wafer 18 is cooled.
By doing in this way, since the wafer 18 can be cooled rapidly, it becomes possible to move and mount quickly also in the other apparatus which cannot carry in the wafer 18 of a high temperature state.
By the way, when a plasma generating apparatus is comprised by the board | substrate holder which one electrode moves continuously as a capacitively coupled parallel plate electrode, there exists a following problem.
Plasma processing on the wafer 18 while continuously moving the substrate holder holding the wafer 18 causes the substrate holder to move continuously, i.e., shifts the positional relationship between the upper electrode and the lower electrode. In this case, since the formation state (volume, density, electron temperature, etc.) of the plasma generated between the parallel plate electrodes changes, the plasma processing cannot be uniformly performed on the wafer 18.
In the present embodiment, since the plasma 30 can be generated by the electrodes of the plasma generating apparatus 20 without being affected by the wafer 18, the substrate holder 17, the conveyor 15, and the like, the wafer Even if the substrate holder 17 holding the 18 is continuously moved by the conveyor 15, it does not affect the plasma generation state.
Therefore, even if the substrate holder 17 is continuously moved by the conveyor 15, the plasma processing can be uniformly performed on the wafer 18. In addition, since it is possible to process the plurality of wafers 18 continuously in the case 11, the throughput can be made higher than that of the conventional sheetfed device.
4 shows a second embodiment of the present invention.
This embodiment differs from the first embodiment in that the holder 22A holding the comb-shaped electrode pairs 23 is formed in a flat plate shape, and the comb-shaped electrode pairs 23 are formed in the processing chamber 12 of the holder 22A. It is a point arrange | positioned at the inner end surface, and it is comprised so that it may contact with the plasma 30. FIG. In another structure, it is the structure similar to 1st Example.
In the present embodiment, the comb-shaped electrode pairs 23 do not interpose a dielectric such as quartz. In other words, the comb-shaped electrode pairs 23 are in communication with the processing chamber 12. In such a configuration, the electric field generated from the comb-shaped electrode pairs 23 is maintained as compared with the first embodiment in which the bottom wall 22b is present. Therefore, the plasma 30 can be generated more efficiently than in the first embodiment.
In addition, when using a corrosive gas as a gas to supply, the comb-shaped electrode pair 23 will deteriorate or etch. Therefore, by forming the comb-shaped electrode pairs 23 using a material such as silicon carbide (SiC), it is possible to extend the life.
5 shows a third embodiment of the present invention.
The present embodiment differs from the first embodiment in that the plasma generating device corresponding to the plasma generating device 20 is an inductive coupling method (inductive coupling device 20B). In another structure, it is the structure similar to 1st Example.
In the following, the inductively coupled device 20B will be described with reference to FIG. 5.
The inductive coupling type | mold apparatus 20B is equipped with the bracket 41. As shown in FIG. The bracket 41 is tightly fixed to the ceiling wall of the case 11, and the dome 42 is fitted into the frame of the bracket 41.
The dome 42 is formed in a dome shape using a nonmetallic material such as aluminum oxide or quartz. A coil 43 is provided on an outer circumference of the dome 42, and a high frequency power source 44 for applying high frequency power to the coil 43 is connected through a matching unit 45 and an insulating transformer 46.
The high frequency power supply 44, the matching unit 45, and the insulating transformer 46 are stored in a distribution panel not shown, which is arranged on the ceiling wall of the case 11.
The plasma generator comprises an inductively coupled device 20B, a coil 43, a high frequency power supply 44, a matcher 45, and an insulating transformer 46. The plasma 49 is generated by applying high frequency power to the coil 43.
The gas supply port 48a is provided in the ceiling wall of the dome 42, and one end of the gas supply pipe 48b is connected to the gas supply port 48a. The gas supply pipe 48b is provided with the gas supply source 48e, the flow rate control device 48d which adjusts the gas flow volume, and the valve 48c which opens and closes a gas flow path in order from an upstream. By opening and closing this valve 48c, gas is supplied from the gas supply pipe 48b to the process chamber 12, or supply stops.
The gas supply part 48 is comprised from the gas supply port 48a, the gas supply pipe 48b, the valve 48c, the flow control apparatus 48d, and the gas supply source 48e. The flow rate control device 48d and the valve 48c are electrically connected to the control unit 80, and are controlled by the control unit 80.
Also in this embodiment, since the plasma 49 can be generated by the inductively coupled device 20B without being affected by the wafer 18, the substrate holder 17, the conveyor 15, or the like, the wafer 18 Even if the substrate holder 17 holding () is continuously moved by the conveyor 15, it does not affect the plasma generation state.
Therefore, even if the substrate holder 17 is continuously moved by the conveyor 15, the plasma processing can be uniformly performed on the wafer 18. In addition, since it is possible to process a plurality of wafers 18 continuously in the case 11, the throughput can be made higher than in the conventional sheetfed device.
6 to 11 show a fourth embodiment of the present invention.
This embodiment differs from the first embodiment in that the substrate processing apparatus is configured in a rotary manner.
First, the structure of the substrate processing apparatus 100 which concerns on this embodiment is demonstrated.
6 is a partially cutaway plan view of the substrate processing apparatus 100 according to the fourth embodiment.
FIG. 7A is a side sectional view of the substrate processing apparatus 100 according to the present embodiment, and FIG. 7B is an a-a 'arrow display diagram of FIG. 7A. 7A is a b-b 'arrow display diagram of FIG. 7B.
8 is an enlarged view of the first shower head 133 (or the second shower head 137).
9 is an explanatory diagram when the wafer 18 is placed.
10 is an explanatory diagram for explaining an exhaust unit of the substrate processing apparatus 100.
11 is an explanatory diagram for explaining the flow of gas in the substrate processing apparatus 100.
The substrate processing apparatus 100 according to the present embodiment includes a case 51 in which a processing chamber 101 is formed. The case 51 is formed in the cylindrical shape, and the cylindrical hollow part forms the process chamber 101. The processing chamber 101 is formed surrounded by the circular reaction chamber wall 103.
An inlet 53 and an outlet 54 are arranged adjacent to each other on the side wall of the case 51. The inlet 53 is configured to be opened and closed by the gate 53A, and the outlet 54 is configured to be opened and closed by the gate 54A.
The inlet side preliminary chamber 57 is connected to the wall which has the inlet 53 of the case 51, and the outlet side preparatory chamber 58 is connected to the wall which has the outlet 54. As shown in FIG. Both preparative chambers 57 and 58 are comprised so that pressure reduction is possible.
The preliminary chamber heater 57A is provided in the inlet side preliminary chamber 57 and the wafer 18 is heated before entering the case 51. In addition, a preliminary chamber cooling mechanism 58A is provided in the exit side preliminary chamber 58 to cool the wafer 18 heated in the case 51.
In the process chamber 101, the rotation roller 120 as a board | substrate support part movement mechanism which arranges and moves the some board | substrate holder 17 (substrate support part) as a support member at intervals is provided. The heater 106 which heats the wafer 18 is arrange | positioned at the bottom of the process chamber 101, and the rotary tray 120 is arrange | positioned at the upper part of the heater 106.
In addition, the rotary tray 120 is connected to the rotary driver 119. The rotary drive unit 119 rotates the rotary shaft 121 so that the rotary tray 120 rotates.
The process gas supply part which supplies a process gas, the inert gas supply part which supplies an inert gas, and the gas exhaust part are provided in the space above the wafer mounting surface of the rotary tray 120.
As shown in FIG. 7, the 1st gas supply part opens and closes the 1st shower head 133 which has a some supply hole, the 1st gas introduction port 135, the gas supply pipe 200b, and the gas flow path. 200c, the flow control apparatus 200d which adjusts gas flow volume, and the gas supply source 200e are provided.
The gas supply pipe 200b is connected to the first gas introduction port 135, and the gas supply source 200e, the flow rate control device 200d, and the valve 200c are sequentially disposed upstream of the gas supply pipe 200b. It is installed. By opening and closing the valve 200c, the gas is supplied from the gas supply pipe 200b to the processing chamber 101 or the supply is stopped.
The first gas supply part supplies a first processing gas, for example, dichlorosilane (DCS).
The 2nd gas supply part adjusts the gas flow volume, the 2nd shower head 137 which has a some supply hole, the 2nd gas introduction port 131, the gas supply pipe 212b, the valve 212c which opens and closes a gas flow path, It has a flow control apparatus 212d and a gas supply source 212e.
The gas supply pipe 212b is connected to the second gas introduction port 131, and the gas supply pipe 212b is provided with a gas supply source 212e, a flow rate control device 212d, a valve 212c, The remote plasma mechanism 212f is provided. By opening and closing the valve 212c, the gas is supplied from the gas supply pipe 212b into the processing chamber 101 or the supply is stopped.
The 2nd gas supply part supplies the ammonia gas which is a 2nd process gas. In this embodiment, the ammonia radicals activated by the remote plasma mechanism 212f are supplied.
A first exhaust hole 128a is formed to surround the first shower head 133. In addition, similarly to the first shower head 133, the first exhaust hole 128a is disposed in a space above the wafer mounting surface of the rotary tray 120 (above the gravity direction).
As shown in FIG. 10, a first exhaust hole 128a is connected to a first exhaust pipe 104 as a first exhaust path, and the first exhaust pipe 104 is a first pressure regulating valve (APC valve) 204. It connects to the 1st exhaust pump 107 as a 1st exhaust apparatus via the via.
It is called a 1st exhaust part including the 1st exhaust hole 128a, the 1st exhaust pipe 104, the 1st exhaust pump 107, and the 1st APC valve 204. FIG.
Similarly, a second exhaust hole 128b is formed to surround the second shower head 137. In addition, similarly to the second shower head 137, the second exhaust hole 128b is disposed in a space on the wafer mounting surface of the rotary tray 120 (upward in the gravity direction).
As shown in FIG. 10, the second exhaust hole 128b is connected to a second exhaust pipe 105 as a second exhaust path different from the first exhaust path, and the second exhaust pipe 105 is a second pressure regulating valve. (APC valve) 206 is connected to the second exhaust pump 108 as the second exhaust unit.
It is called a 2nd exhaust part including the 2nd exhaust hole 128b, the 2nd exhaust pipe 105, the 2nd exhaust pump 108, and the 2nd APC valve 206. FIG.
As illustrated in FIG. 8, the gas supply surfaces of the shower heads 133 and 137 have a lower side 152 far from the rotating shaft 121 of the rotating tray 120 near the rotating shaft 121. It is longer than) and is formed in trapezoidal shape. More gas supply holes formed in the supply surface are formed from the upper side 151 toward the lower side 152.
By setting it as such a structure, the time which the gas of the lower side 152 side with respect to the wafer 18 is exposed can be made close to the time which the gas of the upper side 151 side is exposed. Preferably, it can make it equal by adjusting the number of holes.
In the present embodiment, when the wafer 18 is rotated around the rotating shaft 121, the speed is faster as the place (point) farther away from the rotating shaft 121 is on the surface of the wafer 18. That is, there is a difference in speed at a point close to the rotation shaft 121 and a point far from the rotation shaft 121.
By having the structure as described above, the supply amount of the point close to the rotation axis 121 and the supply amount of the point far from the rotation axis 121 in the wafer 18 can be made similar, and uniform to the surface of the wafer 18. Treatment (e.g., adsorption) is possible.
As in the comparative example of FIG. 15, an apparatus having the same amount of gas supply at a point close to the rotation axis 121 and far from the rotation axis 121 in the wafer 18 is considered. Moreover, adsorption process is considered as a substrate process.
In this case, by rotating at a speed to uniformly adsorb at a point far from the rotation shaft 121, it becomes possible to adsorb uniformly in the surface of the wafer 18. This is because, even if the gas supply time to the wafer 18 is long, at the point close to the rotating shaft 121, it is uniformly adsorbed by the self limit phenomenon. Here, the self-limiting phenomenon means a state in which the film does not grow any more even in the processing gas atmosphere.
However, there is a problem that the throughput is lowered when the rotational speed that is adsorbed at a speed at a far point is lowered.
By having the same structure as in the present embodiment, higher throughput can be achieved.
The distance h corresponding to the distance between the upper side 151 and the lower side 152, that is, the height of the trapezoid, corresponds to the diameter of the wafer 18 or larger than the diameter of the wafer 18. With such a structure, it becomes possible to reliably supply gas to the surface of the wafer 18 on the rotary tray 120.
The inert gas supply unit is a valve 202c for opening and closing the shower plate 134, the gas introduction port 136, the gas supply pipe 202b, and the gas flow path provided between the first and second gas exhaust holes 128a and 128b. And a flow rate control device 202d and a gas supply source 202e for adjusting the gas flow rate.
The gas supply pipe 202b is connected to the gas introduction port 136, and the gas supply source 202e, the flow control apparatus 202d, and the valve 202c are provided in order from the upstream of this gas supply pipe 202b. have. By opening and closing the valve 202c, the gas is supplied from the gas supply pipe 202b into the processing chamber 101 or the supply is stopped.
The shower plate 134 evenly supplies the inert gas (for example, nitrogen) supplied from the gas introduction port 136 into the processing chamber 101.
Thus, the shower plate 134, the gas introduction port 136, the gas supply pipe 202b, the valve 202c for opening and closing the gas flow path, the flow control device 202d for adjusting the gas flow rate, and the gas supply source 202e. Thereby, the inert gas supply part as a 3rd gas supply part is comprised.
The first shower head 133, the second shower head 137, and the shower plate 134 are arranged as shown in FIG. 7B.
That is, the 1st shower head 133 and the 2nd shower head 137 are alternately arrange | positioned in the horizontal direction centering on the rotating shaft 121 of the rotating tray 120 (rotation direction of the rotating shaft 121). Are alternately placed). In addition, the shower plate 134 is arranged to form a gap in each of the exhaust holes 128a and 128b, respectively.
The rotation drive unit 119, the gas supply unit, the gas exhaust unit, and the like are electrically connected to the control unit 80. The control unit 80 controls these configurations.
Next, a sequence example of forming an insulating film on a substrate will be described as one step as a manufacturing step of the semiconductor device (device) according to the present embodiment performed by the substrate processing apparatus 100 described above. In addition, in the following description, the operation | movement of each part of the semiconductor manufacturing apparatus mentioned above is controlled by the control part 80. FIG.
Here, the first element is silicon (Si) and the second element is nitrogen (N). Dichlorosilane (DCS) gas (first gas), which is a silicon-containing gas, as the processing gas containing the first element, and ammonia (NH 3 ) gas (second gas), which is nitrogen-containing gas, as the processing gas containing the second element An example in which a silicon nitride film (SiN film) is formed as an insulating film on the wafer 18 will be described with reference to FIG.
(Wafer import process)
First, the gate 53A of the inlet 53 is opened, and a plurality of wafers 18 (here, four) are loaded into the processing chamber 101 by a conveying apparatus (not shown), and rotated about the rotation shaft 121. It mounts on the tray 120. Then, the gate 53A is closed.
(Pressure adjustment process)
Next, the first and second exhaust pumps 107 and 108 are operated, and the degree of opening of the first and second APC valves 204 and 206 is adjusted so that the process chamber 101 is at a desired pressure (film formation pressure). Control as possible.
Further, electric power is supplied to the heater 106 to control the temperature (film formation temperature) of the wafer 18 to be maintained at a desired temperature (for example, 350 ° C.).
In addition, the rotary tray 120 is rotated at 1 [rotation / second] while heating, and an inert gas (here, nitrogen) is supplied from the shower plate 134.
In the state where the rotary tray 120 is rotated, DCS, which is the first processing gas, is supplied from the first shower head 133 to the processing chamber 101.
By supplying the DCS gas, a first layer containing silicon as the first element is formed (chemically adsorbed) on the base film on the surface of the wafer 18 passing under the first shower head 133. That is, a silicon layer (Si layer) is formed on the wafer 18 (on the base film) as a silicon-containing layer of less than one atomic layer to several atomic layers. The silicon-containing layer may be a chemisorption (surface adsorption) layer of DCS. In addition, silicon is an element which becomes a solid by itself.
The layer containing silicon here includes not only the continuous layer comprised by silicon but a discontinuous layer and the thin film which these superimpose. In addition, the continuous layer made of silicon may be a thin film.
In addition, the chemisorption layer of DCS includes a discontinuous chemisorption layer in addition to the continuous chemisorption layer of DCS molecules.
In addition, when the thickness of the silicon-containing layer formed on the wafer 18 exceeds the water-atomic layer, there is a case where the action of nitriding may not reach the entire silicon-containing layer when the nitriding process is followed. In addition, the minimum value of the silicon containing layer which can be formed on the wafer 18 is less than 1 atomic layer.
Therefore, the thickness of the silicon-containing layer is preferably less than one atomic layer to a few atomic layers.
In addition, by adjusting conditions such as the wafer temperature and the pressure in the processing chamber 101, under the condition that the DCS gas self-analyzes, silicon is deposited on the wafer 18 to form a silicon layer, and the DCS gas does not self-analyze. Under the conditions, the layer formed can be adjusted so that the chemical adsorption layer of DCS is formed by chemisorbing DCS on the two wafers 18.
Moreover, ammonia which is a 2nd process gas is supplied from the 2nd shower head 137 in the state (active species) activated by the remote plasma mechanism 212f. The ammonia gas is adjusted by the flow rate control device 212d.
Since the NH 3 gas has a high reaction temperature and is difficult to react at the wafer temperature and the pressure in the processing chamber as described above, the NH 3 gas is made to flow after being made active by plasma excitation. For this reason, the temperature of the wafer 18 may be in the low temperature range set as mentioned above. Therefore, it is not necessary to change the temperature of the heater 106.
In addition, when the NH 3 gas is supplied, the temperature of the heater 106 is appropriately adjusted without plasma excitation, and the temperature of the wafer 18 is, for example, 600 ° C. or higher, and the second APC valve 206 is further changed. by appropriately adjusting, for example, the pressure in the processing chamber 101 by a pressure in the range of 50~3000㎩, it is also possible to thermally activate the NH 3 gas to the non-plasma.
In addition, when NH 3 gas is activated by heat and supplied, a soft reaction can be generated, but it is necessary to bring it to a high temperature.
For this reason, activation by heat is not suitable when processing a wafer weak in high temperature processing. Here, the wafer which is vulnerable to high temperature treatment is, for example, a wafer having a wiring containing aluminum or the like. In the case of such a wafer, wiring may be oxidized or deformed by high temperature treatment.
Moreover, since the process temperature (wafer temperature) by a 1st gas also raises, it is thought that the process by a 1st gas exceeds the desired temperature range.
Therefore, when using the gas activated by heat, it is preferable that it is a wafer which can also be subjected to a high temperature treatment, and that the first gas treatment is a process that can be performed even at a high temperature.
On the other hand, when the gas is activated by the plasma generating unit, there are the following advantages.
That is, when the wafer temperature processed by the 1st gas and the 2nd gas differs, what is necessary is just to control the heater 106 according to either low wafer temperature.
Therefore, processing can be performed even on a wafer which is weak in high temperature processing.
On the wafer 18 moved from the bottom of the first shower head 133 to the bottom of the second shower head 137, a silicon-containing layer as the first layer is formed, and the NH 3 gas as the active species is a silicon-containing layer. React with some of the.
As a result, the silicon-containing layer is nitrided and modified into a second layer containing silicon (first element) and nitrogen (second element), that is, silicon nitride layer (SiN layer).
As described above, a process in which the wafer 18 passes through the first shower head 133 and the second shower head 137 to form a silicon nitride film is referred to as a silicon nitride film formation process.
As the wafer 18 rotates together with the rotating tray 120, the wafer 18 is formed of the first shower head 133, the second shower head 137, and the other first shower head 133 and the first shower head 133. 2 passes under the shower head 137.
By repeating the silicon nitride film forming process on the wafer 18, a silicon nitride film having a desired film thickness is formed.
Next, the flow of the supplied gas will be described with reference to FIGS. 10 and 11.
The DCS gas supplied from the first shower head 133 is exposed on the wafer 18 and then exhausted from the first exhaust hole 128a together with the inert gas supplied from the shower plate 134.
In addition, the NH 3 gas supplied from the second shower head 137 is exposed on the wafer 18 and then exhausted from the second exhaust hole 128b together with the inert gas supplied from the shower plate 134. .
The shower plate 134 between the DCS gas exhausted by the first exhaust pipe 104 and the first exhaust hole 128a and NH 3 exhausted by the second exhaust pipe 105 and the second exhaust hole 128b. Since there is an inert gas supplied from), it is possible to prevent a gas phase reaction by mixing DCS gas and NH 3 gas.
When a predetermined time elapses and a silicon nitride film having a desired film thickness is formed, the valve 200c or the like is closed to stop the supply of DCS and NH 3 gas.
(Vacuumization process)
The valve 202c of the gas introduction port 136 is continuously opened, and nitrogen (N 2 ), which is a carrier gas (inert gas) whose flow rate is adjusted by the flow rate control device 202d, is supplied into the process chamber 101.
At this time, the first APC valve 204 and the second APC valve 206 of each of the first exhaust pipe 104 and the second exhaust pipe 105 remain open, and the first exhaust pump 107 and the second exhaust pipe 105 are open. The residual gas is exhausted by the exhaust pump 108 so that the inside of the process chamber 101 is 20 kPa or less.
As a result, the processing chamber 101 is replaced with nitrogen (N 2 ).
(Wafer carrying out process)
The first APC valve 204 and the second APC valve 206 of the first exhaust pipe 104 and the second exhaust pipe 105 are kept open and at the same pressure as the outlet preliminary chamber 58 (for example, For example, return to atmospheric pressure. And the processed wafer 18 is carried out from the process chamber 101 by the reverse process of the above-mentioned process.
(3) Effect according to the present embodiment
According to this embodiment, the 3rd gas supply part which supplies the inert gas provided between the 1st exhaust part and the 2nd exhaust part, and at least 1 set of gas supply hole and gas exhaust hole of a gas supply hole and a gas exhaust hole are Since it is formed above the board | substrate mounting surface of the said board | substrate support part, mixing of the 1st gas supplied from a 1st gas supply part and the 2nd gas supplied from a 2nd supply part can be prevented.
12 and 13 show a fifth embodiment of the present invention.
This embodiment differs from the fourth embodiment in that the NH 3 gas is brought into a plasma state by the plasma source 138.
Specifically, in the substrate processing apparatus 100 according to the fourth embodiment, the NH 3 gas is activated by the remote plasma mechanism 212f. In the substrate processing apparatus 100 according to the present embodiment, the processing chamber 101 is used. The plasma source 138 provided therein differs in that the NH 3 gas is brought into a plasma state.
(1) Configuration of Substrate Processing Apparatus 100
The substrate processing apparatus 100 according to the present embodiment will be described with reference to FIGS. 12 and 13.
In addition, since the number similar to 4th embodiment is a structure which has the same function also in this embodiment, description is abbreviate | omitted.
12A is a side sectional view of the substrate processing apparatus 100 according to the present embodiment. (B) of FIG. 12 is a c-c 'arrow display figure of FIG. 12A is a d-d 'arrow display diagram of FIG. 12B.
13 is an enlarged view of the plasma source 138.
In this embodiment, the plasma source 138 is provided instead of the second shower head 137 as the second gas supply unit. In the plasma source 138, the comb-shaped electrode 113 made of a conductive material is sandwiched between the quartz plate 111 and the quartz block 112.
The comb-shaped electrode 113 is integrally formed by engaging two electrodes divided into a comb shape, and has a structure in which high-frequency power with 180 degrees out of phase is applied to both electrodes.
One end of each of the power supply terminals 130 is connected to both ends of the comb-shaped electrode 113, and the other side of the power supply port 130 is connected to the high frequency power supply 117 through the insulating transformer 114 and the matching unit 118. Connected.
The NH 3 gas, which is the second processing gas, is supplied between the quartz plate 111 and the quartz block 112 from the gas introduction port 131. The supplied NH 3 gas becomes a plasma state by the comb-shaped electrode 113, and is supplied to the process chamber 101 from the plurality of small holes 142 formed in the quartz plate 111.
A gas supply pipe 212b is connected to the gas introduction port 131, and a gas supply source 212e, a flow rate control device 212d, and a valve 212c are provided in the gas supply pipe 212b in order from the upstream. . By opening and closing the valve 212c, the gas is supplied from the gas supply pipe 212b into the processing chamber 101 or the supply is stopped.
An electrode cover 143 vented through the second exhaust pipe 105 is provided around the comb-shaped electrode 113 and the quartz block 112. A space is formed between the electrode cover 143 and the quartz block 112 and is utilized as the second exhaust hole 128b.
The electrode cover 143 is attached to the reaction chamber wall 103 by airtight 127 by the shade 127.
Connection points of the power supply port 130, the gas introduction port 131, and the electrode cover 143 are secured by an O-ring (not shown) provided in the seal 132. In addition, the insulating block 122 for holding the quartz block 112 is attached to the electrode cover 143 in a hermetic manner.
Next, a sequence example of forming an insulating film on the wafer 18 will be described as one step as a manufacturing step of the semiconductor device (device) according to the present embodiment performed by the substrate processing apparatus 100 described above.
In addition, in the following description, the operation | movement of each part of the above-mentioned substrate processing apparatus 100 is controlled by the control part 80. FIG.
Since it is the same as that of 4th Embodiment about a wafer carrying process and a pressure adjustment process, description is abbreviate | omitted.
In a state where the rotary tray 120 is rotated, high frequency power is supplied to the comb-shaped electrode 113.
In addition, while the rotary tray 120 is rotated, DCS gas, which is the first processing gas, is supplied from the first shower head 133 to the processing chamber 101.
In addition, ammonia (NH 3 ) serving as the second processing gas is supplied from the gas introduction port 131 between the quartz plate 111 and the quartz block 112. The ammonia gas is adjusted by the flow rate control device 212d.
The ammonia gas supplied is in a plasma state by the high frequency electric power applied to the comb-shaped electrode 113. The ammonia plasma is generated on the surface (process chamber 101 side) of the quartz plate 111.
Since the NH 3 gas has a high reaction temperature and is difficult to react at the wafer temperature and the pressure in the processing chamber as described above, in this embodiment, plasma excitation generates active species of ammonia gas and generates ammonia ions. , The action is used.
For this reason, the temperature of the wafer 18 may be in the low temperature range state set as mentioned above. In the case of reforming in a plasma state, the reactivity with DCS can be made higher than the active species produced by the remote plasma mechanism of the fourth embodiment. On the other hand, by increasing the reactivity, it is necessary to further suppress the mixing of DCS and NH 3 gas.
The NH 3 gas in the plasma state reacts with a portion of the silicon-containing layer as the first layer formed on the wafer 18 moved from below the first shower head 133 to the plasma source 138.
As described above, a process in which the wafer 18 passes through the first shower head 133 and the plasma source 138 to form a silicon nitride film is referred to as a silicon nitride film formation process.
As the wafer 18 rotates together with the rotary tray 120, the wafer 18 is formed by the first shower head 133, the plasma source 138, and the other first shower head 133 and the plasma source ( 138) pass under.
Then, the flow of the gas supplied is demonstrated.
The ammonia plasma supplied from the plasma source 138 is exposed to the wafer 18 and then exhausted from the second exhaust hole 128b together with the inert gas supplied from the shower plate 134.
From the shower plate 134 between the DCS gas exhausted from the first exhaust pipe 104 and the first exhaust hole 128a and NH 3 exhausted from the second exhaust pipe 105 and the second exhaust hole 128b. Since the inert gas present to be supplied, it is possible to prevent the gas phase reaction by the mixing of the DCS gas and the NH 3 gas.
When a predetermined time elapses and a silicon nitride film having a desired film thickness is formed, the valves 200c and 212c are closed to stop the supply of the DCS gas and the NH 3 gas.
In the fifth embodiment of the present invention, the comb-shaped electrode 113 is described as the plasma source 138 as an example. However, the present invention is not limited thereto, but an inductively coupled plasma source (ICP) may be used.
In addition, although the gas supply surface of the shower head (1st shower head 133 and the 2nd shower head 137) was demonstrated in trapezoid shape in 4th, 5th embodiment, it is not limited to this, Even if it is set as triangular shape, do. That is, the structure may be such that the gas supply amount is increased as it goes from the rotation shaft 121 to the end of the rotation tray 120, in other words, the further away from the rotation shaft 121.
In the fourth and fifth embodiments, the wafer 18 is held by the substrate holder 17. However, the wafer 18 is not limited thereto, but the wafer 18 is held by a plurality of pins instead of the substrate holder 17. You may do so.
This embodiment differs from the fourth embodiment in that four plasma generating apparatuses 20 are provided.
In the present embodiment, the substrate 55 as a moving device is provided horizontally in the substrate processing apparatus 100. That is, the movable table 55 is provided with the tray 56 which rotates, and the board | substrate holding tool 17 as a support member which hold | maintained the wafer 18 as a moving object by the rotation of each tray 56 is carried out. Is configured to idle.
The tray 56 has a diameter larger than twice the outer diameter of the wafer 18 and is set to a size capable of carrying the four wafers 18 arranged at the same pitch, that is, a phase difference of 90 degrees.
As shown in FIG. 14, four plasma generating apparatuses 20 having a pair of electrodes are provided on the ceiling wall of the case 51 with the same pitch, that is, a phase difference of 90 degrees, in the rotation direction of the rotating tray 56. Each is arranged.
In addition, the plasma generating device 20 may be replaced with an inductively coupled device 20B (see FIG. 5).
Also in this embodiment, throughput can be improved similarly to other embodiment.
In addition, also in this embodiment, even if the board | substrate holder 17 is continuously moved by the moving table 55, plasma processing can be performed uniformly with respect to the wafer 18. As shown in FIG.
In addition, this invention is not limited to the said embodiment, Of course, a various change is possible in the range which does not deviate from the summary.
For example, the plasma generating device is not limited to the comb-shaped electrode pair and the inductively coupled device, but may be configured by the MMT device or the like.
It is not limited to providing four plasma generating apparatuses, You may install 1-3 or 5 or more.
In the above embodiment, the case where the plasma processing is performed on the wafer 18 in the manufacturing method of the semiconductor device has been described. However, the present invention is not limited thereto, and the plasma processing is performed on the glass panel in the LCD manufacturing method. It can apply to the board | substrate processing apparatus of the whole.
<Explanation of Comparative Example>
Then, a comparative example is demonstrated.
(1) Structure of Substrate Processing Apparatus in Comparative Example
The substrate processing apparatus 300 of a comparative example is demonstrated using FIGS. 15-17. In addition, since the number similar to other embodiment is the structure which has the same function also in this embodiment, description is abbreviate | omitted.
FIG. 15A is a side sectional view of the substrate processing apparatus 300 according to the present embodiment. FIG. 15B is a g-g 'arrow representation of FIG. 15A. FIG.
16 is an explanatory diagram in the case where the wafer 18 is placed.
It is a figure explaining the exhaust part of the substrate processing apparatus 300 in a comparative example.
FIG. 15 shows a cross section of an apparatus for forming a thin film on the surface of the wafer 18 while rotating the plurality of wafers (four in the example) placed on the rotary tray 120.
gg 'arrow is a view showing the structure of the upper side of the processing chamber 101 from the rotary tray 120, hh' arrow is a cross-sectional view of the central portion of the processing chamber 101, the rotary tray 120 and the heater 106 And the like are also shown.
The processing chamber 101 is hermetically formed by the reaction chamber wall 103, and a heater 106 for heating the processing target wafer 18 on the rotary tray 120 is provided below the processing chamber 101. .
The rotary tray 120 is rotatably provided in the upper part of the heater 106, and the rotary drive part 119 has the structure which rotates the rotary shaft 121 connected with the rotary tray 120. As shown in FIG.
As shown in FIG. 16, the some to-be-processed wafer 18 is mounted on the rotation tray 120. FIG.
In the upper part of the process chamber 101, shower heads 123 and 124 for supplying a reactive gas are provided, and it is possible to supply different gases in a shower shape from the plurality of gas ejection openings 126, respectively. A pair of shower heads 116 are provided for supplying water.
In addition, a partition block 125 is provided so as to partition each shower head 123 and 124. An inert gas is supplied from the gas ejection port 126 formed in the partition block 125 so that the reactive gas is treated in the process chamber 101. The structure which suppresses mixing on the rotary tray 120 of this is made.
Each of the shower heads 123 and 124 is provided with a gas supply port 110 and has a structure of supplying necessary gas into the processing chamber 101 via the shower heads 123 and 124.
FIG. 17 is a view schematically showing the g-g 'arrow of FIG. 15 and an exhaust part.
An exhaust pipe 115 is provided on the side surface of the reaction chamber wall 103 to exhaust the gas in the processing chamber 101 to the exhaust device 141 (see FIG. 17).
A gas supply pipe 222b is connected to the gas introduction port 110, and a gas supply source 222e, a flow control device 222d, and a valve 222c are provided in the gas supply pipe 222b in order from the upstream. . By opening and closing the valve 222c, the gas is supplied from the gas supply pipe 222b into the processing chamber 101 or the supply is stopped.
Next, the sequence example of the substrate processing by the apparatus of a comparative example is demonstrated.
Here, as an example, an ALD (Atomic Layer Deposition) method of forming a layer of nitride film by supplying dichlorosilane (DCS) and active species of ammonia (NH 3 ) excited by a remote plasma alternately is described.
The inside of the processing chamber 101 is exhausted to a predetermined pressure by the exhaust device 141.
The wafer 18 is placed on the rotary tray 120 by a carrier robot (not shown). In addition, electric power is supplied to the heater 106 to heat the wafer 18 together with the rotary tray 120 to 350 ° C.
The rotary tray 120 on which the four wafers 18 are placed is rotated at 1 [rotation / second] and nitrogen is supplied from the partition block 125.
In this state, two shower heads 116 are supplied with nitrogen, another shower head 123 is supplied with DCS gas, and another shower head 124 is supplied with NH 3 gas excited with a remote plasma. do.
Note that one wafer 18 on the rotary tray 120 is sequentially supplied with the active species of dichlorosilane, nitrogen and ammonia, and nitrogen as the rotary tray 120 is rotated.
At first, dichlorosilane molecules are adsorbed onto the wafer 18 by the supply of dichlorosilane, and then excess dichlorosilane is removed by supplying nitrogen.
In this state, the active species of ammonia is supplied, and a nitride film is formed for one layer by a chemical reaction, and an extra reactive organism is purged by the next shower head. The series of gas supply is repeated by the rotation of the rotary tray 120, and the nitride films are formed one by one.
Since the active species of dichlorosilane and ammonia are inhibited from mixing on the rotary tray 120 by nitrogen supplied from the partition block 125, deposition of the thin film proceeds one layer without gas phase reaction.
However, the dichlorosilane and ammonia supplied to the processing chamber 101 are mixed near the side of the reaction chamber wall 103 and exhausted by the exhaust device 141 via the exhaust pipe 115.
When dichlorosilane and ammonia supplied to the processing chamber 101 are mixed, a gas phase reaction results in a reaction product. In the structure of this comparative example, the mixing of dichlorosilane and ammonia in the vicinity of the wafer 18 is suppressed by nitrogen supplied from the partition block 125, but the exhaust pipe 115 is mixed after the reaction chamber wall 103 is mixed. Is exhausted by.
For this reason, dichlorosilane and ammonia react with each other in the gas phase of the reaction chamber wall 103 inside the processing chamber 101, particularly near the exhaust pipe 115, to produce reaction by-products such as ammonia chloride, which adhere to the reaction chamber wall and the exhaust path. do. Since this ammonia chloride eventually causes foreign matters, maintenance is frequently required to remove it.
In addition, the gas mixed inside the exhaust device 141 generates by-products such as ammonia chloride, which causes deterioration of the performance of the pump.
Since reactive organisms are also attached to the exhaust pipe 115 and the exhaust device 141, the apparatus needs to be frequently stopped in order to remove them or to overhaul the exhaust device 141, so that the operation rate is lowered and maintenance is performed. It also costs money.
Below, the preferable aspect of this invention is appended.
According to one aspect of the present invention, there is provided a substrate support portion for supporting a substrate, a substrate support portion moving mechanism for moving the substrate support portion, a gas supply portion for supplying gas to the processing chamber, and exhausting gas from the processing chamber. There is provided a substrate processing apparatus having an exhaust portion and a plasma generation portion provided to face the substrate support portion.
According to another aspect of the present invention, there is provided a substrate support portion for placing a substrate on a substrate placing surface to support the substrate, a substrate support portion moving mechanism for moving the substrate support portion, and a first gas for supplying a first gas from the first gas supply hole. A gas supply part, a first exhaust part for exhausting the first gas from the first gas exhaust hole, a second gas supply part for supplying the second gas from the second gas supply hole, and a second gas exhaust for the second gas And a second gas supply portion provided between the first exhaust portion and the second exhaust portion, and a third gas supply portion for supplying an inert gas, the first gas supply hole and the first exhaust portion discharged from the hole. At least any one of a gas exhaust hole, the said 2nd gas supply hole, and the said 2nd gas exhaust hole is provided above the board | substrate mounting surface with respect to the gravity direction. Is provided.
Preferably, the first gas supply hole, the first gas exhaust hole, the second gas supply hole, and the second gas exhaust hole are provided to face the substrate placing surface.
Preferably, the apparatus further includes a first pump connected to the first gas exhaust part via a first exhaust path, and a second pump connected to the second gas exhaust part via a second exhaust path.
Preferably, the substrate support portion rotates about a rotation axis, and the first gas supply portion and the second gas supply portion are alternately arranged with respect to the rotation direction of the rotation shaft, and the gas supply amount is further away from the rotation shaft. It is comprised so that this may become large.
According to another aspect of the present invention, a plurality of substrate support portions provided in a processing chamber for supporting a substrate, a substrate support portion moving mechanism for moving the substrate support portion, a gas supply portion for supplying gas to the processing chamber, and a gas in the processing chamber A method of manufacturing a semiconductor device using a substrate processing apparatus having an exhaust section for exhausting gas and a plasma generation section provided to face the substrate support portion, the method comprising: a gas supply / exhaust gas exhausted from the exhaust section while supplying gas from the gas supply section; A manufacturing method of a semiconductor device having a step and a moving step of moving a plurality of the substrate support parts to the gas supply part and the exhaust part are provided.
According to another aspect of the present invention, a processing chamber for processing a substrate, a supporting member for supporting the substrate, a moving device disposed in the processing chamber, and arranged to move the plurality of the supporting members at intervals, and the moving device Provided is a substrate processing apparatus having a plasma generating apparatus provided at a position opposed to the substrate.
Preferably, the said plasma generating apparatus is provided in multiple numbers at intervals in the direction which the said support member moves.
According to another aspect of the present invention, there is provided a moving device installed in a processing chamber for processing a substrate, the moving device for moving the supporting member supporting the substrate in a plurality of concentric shapes, and a plasma generating device provided at a position facing the moving device. One substrate processing apparatus is provided.
11: case
12: Treatment room
13: entrance
15: Conveyor
17: substrate holder
18: wafer
19 gas exhaust unit
20: plasma generating device
23: comb-shaped electrode pair
30: plasma
31: gas supply unit
32: heater
33: Reserved room at entrance
34: exit side reserve room
48 gas supply unit
51: Case
55: moving table
57: entrance side reserve room
58: exit side reserve room
100: substrate processing apparatus
101: treatment chamber
103: reaction chamber wall
104: first exhaust pipe
105: second exhaust pipe
107: first exhaust pump
108: second exhaust pump
119: rotation drive
120: rotating tray
133: first shower head
134: Shower Board
137: second shower head
138: plasma source
141: exhaust device
A substrate support portion for placing the substrate on the substrate placing surface to support the substrate;
A substrate support moving mechanism for moving the substrate support;
A first gas supply part for supplying the first gas from the first gas supply hole,
A first exhaust part for exhausting the first gas from the first gas exhaust hole,
A second gas supply part for supplying the second gas from the second gas supply hole,
A second exhaust part for exhausting the second gas from the second gas exhaust hole,
A third gas supply unit provided between the first exhaust unit and the second exhaust unit and supplying an inert gas;
Substrate processing in which at least any one of the said 1st gas supply hole, the said 1st gas exhaust hole, the said 2nd gas supply hole, and the said 2nd gas exhaust hole is formed upwards from the board | substrate mounting surface with respect to the gravity direction. Device.
The first gas supply hole, the first gas exhaust hole, the second gas supply hole, and the second gas exhaust hole are formed so as to face the substrate placing surface.
A first pump connected to the first gas exhaust unit via a first exhaust path;
A second pump connected to the second gas exhaust via a second exhaust path
Substrate processing apparatus having more.
The substrate support portion rotates about a rotation axis,
And the first gas supply part and the second gas supply part are arranged alternately with respect to the rotational direction of the rotational shaft, and are configured to increase the gas supply amount as they move away from the rotational shaft.
Placing the substrate on a substrate support in the processing chamber;
At least one of the 1st gas supply hole, the 1st gas exhaust hole, the 2nd gas supply hole, and the 2nd gas exhaust hole is formed above the board | substrate mounting surface in the gravity direction, and the said 1st gas supply Supplying a first gas from the hole and exhausting the first gas from the first gas exhaust hole, supplying a second gas from the second gas supply hole, exhausting the second gas from the second gas exhaust hole And supply an inert gas to the processing chamber from a third gas supply hole for supplying an inert gas provided between the first gas exhaust hole and the second gas exhaust hole, and at least the first gas supply hole and the second gas. Moving the substrate support while supplying gas from a supply hole and the third gas supply hole;
Export process of carrying out a board | substrate from the said process chamber
The manufacturing method of the semiconductor device which has.
KR1020110017384A 2010-02-26 2011-02-25 Substrate processing apparatus and method of manufacturing semiconductor device KR101236108B1 (en)
JP2010041576 2010-02-26
JPJP-P-2010-041576 2010-02-26
JP2010067880 2010-03-24
JPJP-P-2010-067880 2010-03-24
JPJP-P-2011-000515 2011-01-05
JP2011000515A JP5812606B2 (en) 2010-02-26 2011-01-05 Substrate processing apparatus and semiconductor device manufacturing method
KR20110098680A KR20110098680A (en) 2011-09-01
KR101236108B1 true KR101236108B1 (en) 2013-02-21
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KR1020110017384A KR101236108B1 (en) 2010-02-26 2011-02-25 Substrate processing apparatus and method of manufacturing semiconductor device
US (1) US20110212625A1 (en)
JP (1) JP5812606B2 (en)
KR (1) KR101236108B1 (en)
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