WO2017191796A1

WO2017191796A1 - Thin-film production device, and thin-film production method

Info

Publication number: WO2017191796A1
Application number: PCT/JP2017/016584
Authority: WO
Inventors: 孔木村
Original assignee: 株式会社アルバック
Priority date: 2016-05-06
Filing date: 2017-04-26
Publication date: 2017-11-09
Also published as: TW201809327A; CN109154071A; CN109154071B; KR102193817B1; JP6628869B2; KR20180110004A; JPWO2017191796A1

Abstract

Provided is art that enables the long-term use of a film thickness sensor. Fine particles of a film formation material 37 are emitted from a film formation source 12 so as to grow a thin film on a film formation object 15 and a film thickness sensor 31, a measured growth rate of the thin film is obtained by the film thickness sensor 31, the measured growth rate and a preset reference rate are compared, and when electric power is varied such that the measured growth rate approaches the reference rate, a shutter 35 between the film thickness sensor 31 and an emitting part 38 is opened and closed, thus shortening the time for the fine particles to reach the film thickness sensor 31. The film thickness of the thin film grown on the film thickness sensor 31 is less than when the shutter 35 is not opened and closed, thus lengthening the service life of the film thickness sensor 31.

Description

Thin film manufacturing apparatus and thin film manufacturing method

The present invention relates to a technique for forming a thin film, and in particular, to provide a thin film manufacturing apparatus and a thin film manufacturing method in which a film thickness sensor for detecting a growth rate of a thin film has a long usable period.

A reference numeral 100 in FIG. 3 is a conventional thin film manufacturing apparatus and includes a vacuum chamber 113. An evaporation source 112 is disposed inside the vacuum chamber 113.
The evaporation source 112 has an evaporation container 133, and the film formation target substrate 115 carried into the vacuum chamber 113 passes or is disposed above the evaporation container 133. Yes.

The evaporation container 133 is hollow, and an organic material 137 made of a powdery organic compound is disposed inside the evaporation container 133.
The evaporation container 133 is provided with a heating device 134, and the heating device 134 is connected to a film forming power source 145.

The inside of the vacuum chamber 113 is evacuated by the vacuum evacuation device 139 to form a vacuum atmosphere, and the heating device 134 is energized by the film forming power source 145 to generate heat. The heated heating device 134 heats the evaporation container 133. The organic material 137 that has been heated and disposed inside the evaporation container 133 is heated by the evaporation container 133 that has been heated.
When the organic material 137 is heated to an evaporation temperature or higher, it evaporates (including sublimation), and a large amount of the vapor of the organic material 137 is released into the evaporation container 133.

A discharge hole 138 is provided at a position of the evaporation container 133 facing the film formation target substrate 115, and the generated vapor is discharged from the discharge hole 138 into the vacuum chamber 113 and reaches the surface of the film formation target substrate 115. Then, a thin film of the organic material 137 grows in the reached portion.

In the thin film manufacturing apparatus 100, a growth rate control circuit 114 that controls the growth rate of the thin film of the organic material 137 is disposed outside the vacuum chamber 113.
The procedure by which the growth rate control circuit 114 controls the growth rate will be described. A film thickness sensor 131 is provided in the vacuum chamber 113, and the film thickness sensor 131 is provided in the growth rate control circuit 114. The growth rate measuring device 141 is connected.

The film thickness sensor 131 is disposed at a side position of the film formation target substrate 115, and the vapor of the organic material 137 released from the evaporation source 112 reaches the film formation target substrate 115 and the film thickness sensor 131. A thin film is grown on the film formation target substrate 115 and the film thickness sensor 131, and the film thickness detected by the film thickness sensor 131 is output to the growth rate measuring device 141 as a signal indicating the film thickness. The measuring device 141 obtains the growth rate of the film thickness, and a signal indicating the growth rate is output to the velocity deviation detector 142 as a measurement signal.

The desired growth rate of the thin film grown on the surface of the film formation target substrate 115 is obtained in advance, converted into the growth rate of the surface of the film thickness sensor 131 and stored in the storage device 143 as a reference value. From this, a reference signal indicating a reference value is output and input to the speed deviation detector 142.

The speed deviation detector 142 obtains a magnitude relationship and a difference value between the value indicated by the input reference signal and the value indicated by the input measurement signal, and calculates a deviation which is a signed difference value indicating positive / negative. A deviation signal is output from the speed deviation detector 142 to the film forming power source 145.

When the deviation signal input to the film forming power source 145 indicates that the growth rate indicated by the measurement signal has a value larger than the growth rate indicated by the reference signal, the film forming power source 145 includes the heating device 134. Is reduced, the amount of vapor generated by the organic material 137 inside the evaporation source 112 is reduced, and the growth rate values of the film formation target substrate 115 and the film thickness sensor 131 are reduced.

On the other hand, when the growth rate indicated by the measurement signal is smaller than the growth rate indicated by the reference signal, the film-forming power source 145 increases the current output to the heating device 134 to increase the organic content inside the evaporation source 112. The growth rate of the film formation target substrate 115 and the film thickness sensor 131 is increased by increasing the amount of vapor generated from the material 137.

In this way, by adjusting the value of the current supplied to the heating device 134, the variation in the amount of steam generated from the organic material 137 is reduced, the amount of steam generated is maintained at a constant value, and the growth rate is set to the reference value. Maintained.
The amount of current to be increased and the amount of current to be decreased are proportional to the value of the deviation. When the absolute value of the deviation is large, the deviation quickly approaches zero.

However, with a constant monitoring system that always measures the growth rate and compares the growth rate with the reference value, the growth rate value changes and the growth rate changes with the amount of output current. There is a problem that it becomes difficult to control the actual increase / decrease of the growth rate and the amount of change due to the influence of delay or the like.

Reference numeral 105 in FIG. 4 is a curve showing a change in the growth rate over time when the growth rate is controlled by a constant monitoring method, and a small increase or decrease is made while the growth rate approaches the straight line 106 indicating the reference value. As a result of this fine increase / decrease, the difference between the actual growth rate and the reference value is large even when the reference value is approached.

WO2015 / 182090

The present invention was created to solve the above-mentioned disadvantages of the prior art, and an object of the present invention is to provide a thin film manufacturing apparatus capable of detecting the growth rate of a thin film for a long period of time.

In order to solve the above-described problems, the present invention provides a vacuum chamber, a film formation source in which a film formation material is disposed, power supply to the film formation source, and the film formation material disposed in the film formation source. A main controller for discharging fine particles from the discharge part of the film forming source to the inside of the vacuum chamber, and a film thickness of the thin film formed on the surface, arranged at a position where the fine particles reach and the thin film grows A film thickness sensor that outputs a film thickness signal of the content, and the main control device determines the magnitude of electric power supplied to the film formation source based on the film thickness signal output by the film thickness sensor. A thin film manufacturing apparatus for changing a discharge rate of the film forming source to grow a thin film on the surface of the film formation target at a desired growth rate, wherein a shutter is disposed in the vacuum chamber, and the shutter Is moved by the main controller, and the shutter is connected to the film thickness sensor. A shielded state that is located between the discharge part and shields the fine particles from reaching the film thickness sensor, and moves from a position between the film thickness sensor and the discharge part to another place, The thin film manufacturing apparatus is configured to switch a reaching state in which fine particles reach the film thickness sensor.
This invention is a thin film manufacturing apparatus with which the film thickness of the thin film formed in the said film thickness sensor is measured during the arrival period when the said shutter maintains the said arrival state.
The present invention is a thin film manufacturing apparatus that obtains the measured growth rate on the film thickness sensor from the measured film thickness and changes the magnitude of electric power supplied to the film formation source.
The present invention provides a vacuum atmosphere inside the vacuum chamber, supplies power to a film forming source disposed inside the vacuum chamber, and discharges fine particles of a film forming material from a discharge portion of the film forming source. The fine particles reach the film formation object and the film thickness sensor located in the atmosphere, and the measurement growth rate is changed by changing the magnitude of the electric power based on the growth rate of the thin film grown on the film thickness sensor. A thin film manufacturing method that approaches a reference speed, wherein a shutter is provided inside the vacuum chamber, the shutter is opened and closed while the fine particles reach the film formation target, and the film thickness sensor and the discharge unit The shutter is positioned between the film thickness sensor and the film thickness sensor so that the fine particles do not reach the film thickness sensor. Reachable state Which is a thin film manufacturing method of switching alternately.
The present invention is the thin film manufacturing method according to claim 4, wherein the measured growth rate is obtained for each arrival period in which the shutter maintains the arrival state, and the magnitude of electric power supplied to the film forming source is changed.

In the present invention, if the time for one cycle is set and the supplied power is changed once during one cycle, the growth rate oscillation caused by the constant control is eliminated, so that the control becomes easy.

In the above-described conventional thin film manufacturing apparatus, since the amount of vapor generated from the organic material is constantly monitored, it is necessary to frequently replace the film thickness sensor. Since the time (period) during which the sensor is attached to the film is shorter than before, it is possible to form a film on a large number of film formation objects with less replacement frequency than before.

Further, according to the present invention, the time for the thin film to adhere to the film thickness sensor can be shortened, so that the life of the film thickness sensor can be extended.

The block diagram for demonstrating the thin film manufacturing apparatus of this invention Graph for explaining the relationship between the oscillation frequency and film thickness of crystal units Block diagram for explaining a conventional thin film manufacturing apparatus Graph showing growth rate over time A graph comparing the frequency change in the arrival period and the frequency change when the arrival period and the cutoff period are repeated in a short time

Reference numeral 10 in FIG. 1 indicates a thin film manufacturing apparatus of the present invention.
The thin film manufacturing apparatus 10 includes a vacuum chamber 13, and a film forming source 12 is disposed inside the vacuum chamber 13.

The film forming source 12 has a hollow evaporation container 33, and a film forming material 37 is disposed in the hollow portion. The film forming material 37 is a powdery organic compound here, but may be an inorganic material such as a metal material or a metal oxide, or a liquid material.

A vacuum evacuation device 45 is connected to the vacuum chamber 13, and when the vacuum evacuation device 45 is operated and the inside of the vacuum chamber 13 is evacuated, a vacuum atmosphere is formed inside the vacuum chamber 13.
The inner hollow portion of the evaporation container 33 is evacuated by the evacuation device 45, and a vacuum atmosphere is formed in the same manner as the vacuum chamber 13. Another vacuum evacuation device may be connected to the evaporation vessel 33, and the inside of the evaporation vessel 33 may be evacuated by the vacuum evacuation device.

A main controller 18 is disposed outside the vacuum chamber 13.
The main controller 18 is provided with a growth rate controller 14, and the growth rate controller 14 is provided with a film forming power source 46 and a power source controller 42 for controlling the operation of the film forming power source 46.

When the power supply controller 42 operates the film forming power source 46, power is supplied from the film forming power source 46 to the film forming source 12.
A heating device 34 is provided inside the film forming source 12, and the heating device 34 generates heat by the supplied power to heat the film forming material 37.

When the film forming material 37 is heated to the evaporation temperature or higher in a state where the inside of the vacuum chamber 13 is in a vacuum atmosphere, vapor is generated from the film forming material 37. The generated vapor is fine particles of the film forming material 37.

A vapor discharge hole is formed as a discharge part 38 in the ceiling of the evaporation container 33, and the fine particles of the film forming material 37 pass through the vapor discharge hole, so that the inside of the vacuum chamber 13 from the discharge part 38 of the film formation source 12. Then, the fine particles of the film forming material 37 are released.
Therefore, when power is supplied from the main controller 18 to the film forming source 12, the fine particles of the film forming material 37 are released from the film forming source 12. The discharge part 38 may be a plurality of vapor discharge ports.

In the vacuum chamber 13, the film formation target is placed stationary at the film formation position where the fine particles of the film formation material 37 reach, or the film formation target passes through the film formation position. Has been. Here, the substrate holder 39 is provided at the film formation position where the fine particles of the film formation material 37 reach, and the film formation target indicated by reference numeral 15 is held by the substrate holder 39 and is stationary.
When the fine particles of the film formation material 37 reach the surface of the film formation target 15, a thin film (here, an organic thin film) containing the components of the film formation material 37 grows on the surface of the film formation target 15.

A film thickness sensor 31 and a shutter 35 are disposed inside the vacuum chamber 13.
The main controller 18 is provided with a motor controller 51 and an opening / closing controller 43 connected to the motor controller 51.

The shutter 35 is connected to a motor 36, and the rotation of the motor 36 is controlled by a motor controller 51.
The shutter 35 is moved in the vacuum chamber 13 by the rotation of the motor 36 so that the position can be changed. The shutter 35 is moved from the blocking position in the blocking state, which is located at the blocking position, which is a position between the film thickness sensor 31 and the discharge portion 38, by the opening / closing controller 43 controlling the motor controller 51. Thus, unlike the shut-off location, any state of the reach state when located at a location not between the film thickness sensor 31 and the discharge portion 38 can be taken. Therefore, the shutter 35 is to be opened and closed by being in the shielding state and the reaching state.

When the shutter 35 is in the reaching state, the film thickness sensor 31 is located at a location where the fine particles of the film forming material 37 emitted from the film forming source 12 can reach, and at that time, the film forming object 15 and the film thickness. Fine particles of the film forming material 37 released from the same film forming source 12 reach the sensor 31, and a thin film made of the same kind of fine particles is formed on the surface of the film thickness sensor 31 and the surface of the film formation target 15. grow up.
Since the film formation target 15 and the film thickness sensor 31 have different distances from the film formation source 12, the film formation target 15 and the film thickness sensor 31 have a film thickness at a certain place ratio corresponding to the distance. A thin film grows.

The main controller 18 is provided with a growth rate measuring device 41, and the film thickness sensor 31 is connected to the growth rate measuring device 41.
The film thickness sensor 31 outputs a film thickness signal indicating the film thickness of the thin film attached to the surface to the main controller 18. The film thickness signal output from the film thickness sensor 31 is input to the growth rate measuring device 41 of the main control device 18, and the growth rate measuring device 41 continues (for example, within 1 second) while the shutter 35 is continuously reached. ), The film thickness of the thin film on the film thickness sensor 31 is measured at different times.
The main control device 18 operates the shutter 35 so as to alternately repeat a certain arrival period and a certain shielding period, and a total of one arrival period and one shielding period adjacent to the arrival period. Assuming that the time is one cycle, the amount of change in the film thickness on the film thickness sensor 31 measured for each arrival period, the time between the measurement times different in the adjacent arrival periods, and the time of one cycle, The growth rate of the thin film grown on the film thickness sensor 31 is calculated. Here, the growth rate is “the increase in film thickness / the time required for the increase”.

There is a certain proportional relationship between the growth rate of the thin film grown on the film thickness sensor 31 and the growth rate of the thin film grown on the film formation target 15 corresponding to the value of the above-mentioned location ratio regarding the film thickness. Yes, the proportionality coefficient of the proportionality of the growth rate is obtained in advance when measuring the location ratio. The main controller 18 can calculate the growth rate of the thin film on the film formation target 15 from the proportional relationship and the growth rate of the thin film on the film thickness sensor 31. Here, the growth rate measuring device 41 outputs the calculated growth rate of the thin film on the film thickness sensor 31 as the measured growth rate.
The main controller 18 is provided with a storage device 49, which stores a reference value for the growth rate of the thin film on the film thickness sensor 31 as a reference rate.

A reference speed and a measured growth speed are input to the power supply controller 42.
The power supply controller 42 compares the reference speed and the measured growth speed, calculates a deviation consisting of a value corresponding to the difference and a sign indicating which is larger, and forms a film forming power supply 46 as a control signal indicating the speed deviation. Output to.

Even when the growth rate of the thin film grown on the film formation target 15 is output from the growth rate measuring device 41 as the measurement growth rate, the reference value of the growth rate for the film formation target 15 is set as the target growth rate. If this is the case, the growth rate of the thin film on the film thickness sensor 31 and the reference speed for the film thickness sensor 31 are compared.

In any case, the magnitude of the electric power supplied from the film formation power source 46 to the heating device 34 is controlled by a control signal output from the power supply controller 42. When the measured growth rate is larger than the reference rate, the film formation is performed. In order to reduce the release rate of the fine particles of the material 37, the film forming power source 46 is controlled to reduce the power supplied to the heating device 34. The “release rate” of the film forming source 12 is a value of “release amount / release time of the film forming source 12”.
When the measured growth rate is lower than the reference rate, the film forming power source 46 is controlled to increase the power supplied to the heating device 34 in order to increase the particle release rate.

During the shielding state in which the shutter 35 is located at the blocking location, the vapor emitted from the discharge unit 38 does not reach the film thickness sensor 31 even if it reaches the film formation target 15 and does not reach the film formation target 15. Even if a thin film grows on the film thickness sensor 15, no thin film grows on the film thickness sensor 31.

Accordingly, the thin film formed on the film thickness sensor 31 is thinner than the film thickness of the thin film formed on the single film formation object 15, and therefore, a plurality of film formation objects are obtained by the single film thickness sensor 31. 15 can be formed one by one.

The graph of FIG. 2 shows the relationship between the oscillation frequency (horizontal axis) of the film thickness sensor 31 composed of a crystal resonator and the weight of the thin film per unit area of the surface of the film thickness sensor 31 (vertical axis: film thickness × density). This graph shows that the oscillation frequency decreases as the thin film on the surface of the thin film grows. “Z” in the figure is a symbol indicating the acoustic impedance ratio between the thin film adhering to the crystal unit and the crystal unit.

For a crystal resonator having any value of “z”, the linearity of the graph is higher than the other portions between a frequency (for example, 4.8 MHz) that is a few tenths of a MHz lower than 5 MHz to 5 MHz. Within the range, it can be seen that the thickness of the thin film having a known density can be accurately obtained from the measured oscillation frequency value.

When the vapor discharged from the discharge portion 38 reaches the film formation target 15 and the film thickness sensor 31, the growth rate of the thin film formed on the film thickness sensor 31 is measured. When maintaining, the reaching state and shielding state of the shutter 35 are repeated. Then, when reaching the state during the repetition, the measurement growth rate is obtained and the power supplied to the film forming source 12 is controlled so that the film formation target 15 is the same vacuum chamber 13 as the film thickness sensor 31. While the thin film having a predetermined thickness is formed on the surface of the film formation target 15, the film thickness sensor 31 indicates the time for the thin film to grow on the surface of the film formation target 15. It can be made shorter than the growth time.
Therefore, the shutter 35 alternately repeats the shielding state and the reaching state, and by measuring the film thickness when the shutter 35 is in the reaching state, the film thickness of the thin film formed on the surface of the film thickness sensor 31 is reduced to the reaching state without the shielding state. Can be made thinner than when maintaining.

The shielding period for maintaining the shielding state and the reaching period for maintaining the reaching state are stored in the storage device 49, and a period signal indicating the length of each period is output to the opening / closing controller 43 as a set value. In accordance with the set value period signal output from the storage device 49, a trigger is output to the growth rate controller 14 during the arrival period, and the power supplied to the film forming source 12 is changed to the power source controller 42.

In this way, when the measured growth rate is obtained during the arrival period and the magnitude of the supplied power is changed, the supply of power changed to the immediately preceding arrival period may be continuously performed during the shielding period. However, the magnitude of the power output in the immediately preceding arrival period may be changed during the shielding period.

Reference numeral 5 in FIG. 4 is a polygonal line showing the change over time of the growth rate when the magnitude of the power changed at each measurement time t ₁ to t ₅ is maintained between the measurement times t ₁ to t _5. Between t ₁ and t ₅ , the growth rate changes linearly, and is a constant value near the straight line 6 indicating the reference value.

Whether the power is maintained or changed between the measurement times t ₁ to t ₅ , the total time of one arrival period and one shielding period adjacent to the arrival period is one cycle. Compared to the case where the entire period is the arrival period, when the arrival period and the shielding period are repeated at a constant rate, the time of arrival state / one period is smaller than “1” and the film thickness is “arrival” "Time of state / one cycle" times. Accordingly, the usable time of the film thickness sensor 31 used in the present invention is doubled by “one period / time of arrival state”.

FIG. 5 shows the relationship between the elapsed time (horizontal axis) and the frequency (vertical axis) of the film thickness sensor when the short arrival period and the shielding period are repeated after the long arrival period. The slope of the curve L ₁ indicating the relationship between the elapsed time and the frequency between the start time A of the arrival period and the cutoff time B of the arrival period shows the arrival period and the cutoff period after time B. It can be seen that the slope of the curve L ₂ when repeated is larger, and therefore, when the reaching period and the cutoff period are repeated, the thickness of the thin film formed on the surface of the film thickness sensor 31 is small.

In the above embodiment, the measured growth rate was obtained within one arrival period, but the film thickness value obtained at the first time, which is the time during one arrival period, and the time during the previous arrival period. The measurement growth rate is obtained from the film thickness difference that is the difference between the film thickness value obtained at the second time and the total time of the arrival period between the first time and the second time. You may do it. In short, the present invention is not limited to obtaining the measured growth rate based only on the value of the film thickness during one arrival period.
In addition, since the proportional relationship of the growth rate between the film formation target 15 and the film thickness sensor 31 is known, the desired growth rate on the film formation target 15 is converted into the growth rate on the film thickness sensor 31. The main controller 18 sets the growth rate on the film thickness sensor 31 as a reference value, compares the growth rate of the film thickness sensor 31 with the reference value, and controls the power supplied to the heating device 34 to control the film thickness sensor. The growth rate of 31 may be a reference value.
In the above example, the film thickness of the film thickness sensor 31 is measured during the arrival period, but may be measured during the shielding period. In this case, the film thickness of the film formation target 15 at the measured time can also be obtained by the measurement value and calculation at another time.

Further, in the above embodiment, a resistance heater is used for the heating device 34, the evaporation container 33 is heated by heat conduction, and the film forming material 37 is heated by the evaporation container 33 whose temperature has been raised by heat conduction. The temperature of the film forming material 37 is controlled by controlling the amount of heat generated by the heating device 34, and the evaporation vessel 33 is heated using an infrared lamp as the heating device 34. An induced current may be passed through the evaporation container 33 to heat the evaporation container 33.

Furthermore, although the vapor deposition apparatus is used in the above example, in the present invention, a sputtering target is used as a film forming source, and the main controller 18 is provided with a sputtering power source for supplying power to the sputtering target as a film forming power source. The plasma is generated on the emission part which is the surface of the film formation source by the power supplied from the film formation power source to the film formation source, the film formation source is sputtered, and the fine particles of the film formation material composed of the sputtered particles are emitted from the emission part. Also included is a sputtering apparatus that discharges and forms a thin film by allowing fine particles to reach the surface of the film formation target and the surface of the film thickness sensor. In short, the present invention includes a film forming apparatus provided with a shutter that can move between a blocking location between the film thickness sensor and the film forming source and another location, in the thin film manufacturing apparatus of the present invention.
Moreover, in the said Example, although the evaporation container 33 was arrange | positioned inside the vacuum chamber 13, the evaporation container may be arrange | positioned outside the vacuum chamber 13. FIG.

The “evaporation rate” in the above description means the amount of vapor released per unit time, and does not mean the vapor flight speed.

DESCRIPTION OF SYMBOLS 10 ... Thin film manufacturing apparatus 13 ... Vacuum tank 14 ... Growth rate controller 15 ... Film formation target 31 ... Film thickness sensor 35 ... Shutter 33 ... Evaporation container 37 ... Film formation material 41 ... Growth Speed measuring device 42 …… Power supply controller 45 …… Vacuum exhaust device 46 …… Deposition power source 49 …… Storage device 51 …… Motor controller

Claims

A vacuum chamber;
A deposition source where the deposition material is disposed;
A main control device for supplying electric power to the film forming source and discharging fine particles of the film forming material arranged in the film forming source from the discharge part of the film forming source into the vacuum chamber;
A film thickness sensor that outputs a film thickness signal that indicates the film thickness of the thin film that is disposed on the surface where the fine particles reach and the thin film grows.
Have
Based on the film thickness signal output from the film thickness sensor, the main control device changes the discharge rate of the film formation source by changing the magnitude of the power supplied to the film formation source, thereby achieving a desired growth. A thin film manufacturing apparatus for growing a thin film on the surface of the film formation object at a speed,
A shutter is disposed in the vacuum chamber,
The shutter is moved by a main control unit;
The shutter is located between the film thickness sensor and the discharge portion and shields the fine particles from reaching the film thickness sensor, and from a position between the film thickness sensor and the discharge portion. A thin film manufacturing apparatus configured to be switched to an arrival state in which the fine particles reach the film thickness sensor by moving to another place.
The thin film manufacturing apparatus according to claim 1, wherein the film thickness of the thin film formed on the film thickness sensor is measured during an arrival period in which the shutter maintains the arrival state.
2. The thin film manufacturing apparatus according to claim 1, wherein the measured growth rate on the film thickness sensor is obtained from the measured film thickness, and the magnitude of electric power supplied to the film forming source is changed.
The inside of the vacuum chamber is made into a vacuum atmosphere, power is supplied to the film forming source disposed inside the vacuum chamber, and the fine particles of the film forming material are discharged from the discharge portion of the film forming source, and the vacuum chamber is positioned in the vacuum atmosphere. The fine particles reach the film formation target and the film thickness sensor, and the measurement growth rate is brought close to the reference speed by changing the magnitude of the electric power based on the growth rate of the thin film grown on the film thickness sensor. A thin film manufacturing method,
A shutter is provided inside the vacuum chamber,
The shutter is opened and closed while the fine particles reach the film formation target, and the shutter is positioned between the film thickness sensor and the discharge portion so that the fine particles do not reach the film thickness sensor. A thin film manufacturing method that alternately switches between a state and an arrival state in which the fine particles reach the film thickness sensor by moving the shutter from between the film thickness sensor and the discharge portion.
The thin film manufacturing method according to claim 4, wherein the measured growth rate is obtained for each arrival period in which the shutter maintains the arrival state, and the magnitude of electric power supplied to the film forming source is changed.