JP2002273308A - Dry state measuring device and coating film dryer equipped with the device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To measure the dry state of a coating film. SOLUTION: A coating material containing at least an optically transparent solvent and a powder dispersed in the solvent as components is applied onto a base film 108 to form a coating film 109. A light projecting means 103 shines irradiating light on the coating film 109, and the dry state of the coating film 109 is detected based on the timewise change of transmitted light and scattered light.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dry state measuring apparatus and a dry state measuring apparatus using a drying technique when a paint containing pigment, opaque powder, etc., such as a magnetic tape, ceramic, or industrial tape, is formed into a film. The present invention relates to a coating film dryer provided with:

[0002]

2. Description of the Related Art Functional films and tapes are commercially available, in which various powders and binders, whether inorganic or organic, are dispersed in a solvent to form a coating material and uniformly formed on a base film through a coating and drying process. It is used in many situations, regardless of field or industrial field.

[0003] An outline of a method for producing the above-mentioned functional film is as follows. That is, a powder that exhibits functionality and a binder that binds the powders are uniformly dispersed in a solvent to prepare a paint. The coating material in which a good dispersion state is maintained is uniformly applied on the base film by a coating machine. In this case, the coating machine used is a feeding section for feeding the base film, a coater head for applying the coating on the base film, a dryer for drying the applied coating film, and a film on which the dried coating film is formed. Is roughly divided into four parts, ie, a winding part for winding the material into a roll.

[0004] There are various types of coater heads depending on the coating method, and the most suitable one is adopted in consideration of the flow characteristics and the like of the paint. The film on which the coating film is formed by the coater head is sent to a dryer, and proceeds to a coating film drying step. There are various types of dryers, such as hot air drying and infrared drying using electric heat, and the most suitable drying method is selected from the characteristics of the coating film and the base material. Generally, hot-air drying has high drying efficiency, but since the drying proceeds from the surface, cracks may occur in the coating film. In the case of drying using a far-infrared heater, cracks are unlikely to occur on the surface because heating proceeds from the inside of the coating film. However, since the drying efficiency is low, the feed of the object to be dried must be suppressed. As a method for detecting the dry state, a method of monitoring the light absorption spectrum of the solvent, a method of monitoring the coating film surface with an infrared radiation thermometer, and the like can be considered. The dried film is wound up on a roll together with the base film. Thereafter, the roll-shaped film is cut into a fixed width by a slitter or the like, and is flowed to a product or the next step.

[0005]

With the advancement of technology, the required use of films formed has become strict, and from the viewpoints of "more uniform" and "more precise stepping", coating of paints on substrate films. It is important to optimize the drying conditions as well as to increase the precision. For that, uniform drying is the key point,
It is essential to observe the dryness of the coating. However, when the surface of the coating film is measured by an infrared radiation thermometer, an improvement in accuracy cannot be expected in a state where an infrared radiation source is present around the coating film, that is, during the drying process. Further, when measuring the residual solvent by light absorption spectrum, the method can be applied to the case where the solvent is water or the like and the molecular structure is largely different from that of the substance to be dried.
When the material to be dried contains a resin binder, the molecular structure of the solvent may be similar to that of the material to be dried, and this method may not be applicable. Also, when a complex solvent composed of a plurality of organic solvents is used, it is difficult to detect a dry state by a light absorption spectrum method.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a dry state measuring device for measuring a dry state in real time during a drying process, and a dryer using the same. It is an object of the present invention to manufacture a high-precision multilayer ceramic electronic component using a machine, and to provide a small and high-precision communication device such as a mobile phone or a mobile terminal using the electronic component.

[0007]

In order to achieve the above-mentioned object, a dry state measuring apparatus according to a first aspect of the present invention comprises a solvent having a light transmitting property and a powder dispersed in the solvent. In a coating film formed by applying a coating material containing as an element on a light-transmitting substrate, a light projecting unit for irradiating the substrate and the coating film with light, and the light projecting unit for the coating film It has a light receiving means arranged on the opposite side, and detects a dry state of the coating film by reducing the amount of transmitted light received by the light receiving means.

[0008] The dry state measuring apparatus of the second invention of the present application is formed by applying a solvent having a light transmitting property and a coating material containing at least a powder dispersed in the solvent as a constituent element on a substrate. The coating film includes a light projecting unit configured to irradiate the coating film surface with light from an oblique direction on the coating film side, and a light receiving unit disposed on the same side as the light projecting unit with respect to the coating film. The drying state of the coating film is detected based on a decrease in the amount of reflected light received by the means.

A dry state measuring apparatus according to a third aspect of the present invention is a coating apparatus formed by applying a permeable solvent and a coating material containing at least a powder dispersed in the solvent on a substrate. The film includes: a light projecting unit configured to irradiate the coating film surface with light from an oblique direction on the coating film side; and a light receiving unit arranged on the same side as the light projecting unit with respect to the coating film. Detecting the dry state of the coating film by the change in the ratio of the amount of direct reflection and the amount of reflection due to surface scattering.

[0010] The coating film dryer according to the fourth aspect of the present invention is the first type of the present invention.
According to the third aspect of the present invention, the drying temperature or the feed speed of the object to be dried with respect to the dryer is adjusted based on the drying state information obtained by the drying state measuring device of the third invention.

A dry state measuring apparatus according to a fifth aspect of the present invention is a method for applying a paint having at least a component having a light-transmitting solvent and a powder dispersed in the solvent on a light-transmitting substrate. In the formed coating film, a light emitting means for irradiating the base material and the coating film with light, and light receiving means arranged in an array on the opposite side of the light emitting means with respect to the coating film,
The transmitted light is imaged by the array type light receiving means, and the in-plane distribution of the dried state of the coating film can be measured.

A dry state measuring apparatus according to a sixth aspect of the present invention is formed by applying a solvent having a light transmitting property and a paint containing at least a powder dispersed in the solvent as a component on a substrate. In the coating film, light-emitting means for irradiating the coating film surface with light from the oblique direction of the coating film, and light-receiving means arranged in an array on the same side as the light-emitting means with respect to the coating film Imaging the reflected light by the array type light receiving means,
The in-plane distribution of the dried state of the coating film can be measured.

[0013] A dry state measuring apparatus according to a seventh aspect of the present invention is a coating apparatus formed by applying a solvent having permeability and a coating material containing at least a powder dispersed in the solvent as a constituent element to a substrate. In the film, a light projecting means for irradiating the coating film surface with light from the coating film side oblique direction, and a light receiving means arranged in an array type on the same side as the light projecting means with respect to the coating film, While the array type light receiving means receives the light, the change in the ratio between the amount of direct reflection and the amount of reflection due to surface scattering is imaged, and the in-plane distribution of the dried state of the coating film can be measured.

The coating film dryer according to the eighth aspect of the present invention is the same as the fifth aspect of the present invention.
To the seventh aspect of the present invention, and a heater disposed two-dimensionally in parallel to the coating surface, the heater according to the dry state distribution information in the coating film surface obtained from the drying state measurement device, It is characterized in that individual temperatures can be adjusted.

The coating film dryer according to the ninth aspect of the present invention is the same as the fifth aspect of the present invention.
To a drying state measuring device according to the seventh aspect of the present invention, and a hot air blowing nozzle arranged in the width direction with respect to the feed direction of the object to be dried, and the dry state distribution information in the coating film surface obtained from the drying state measuring device. Thus, the opening degree and the blowing direction of the hot-air blowing nozzle can be adjusted.

A multilayer ceramic electronic component according to a tenth aspect of the present invention is characterized in that it is produced using a green sheet produced by using the coating film dryer according to the fourth, eighth and ninth aspects of the present invention. It is.

The communication device according to the eleventh aspect of the present invention is the communication device according to the first aspect of the present invention.
A transmission circuit or a reception circuit is constituted by using the multilayer ceramic electronic component of the invention.

A coating machine according to a twelfth aspect of the present invention is a coating machine formed by applying a light-transmitting solvent and a coating material containing at least a powder dispersed in the solvent as a component on a substrate. In the film, a light projecting unit that irradiates the coating film with irradiation light, a light detection unit that detects one or a plurality of light intensities of transmitted light, reflected light, or scattered light by the irradiation light, Drying state detecting means for detecting a drying state of the coating film from the signal of the light intensity, and a forming speed of the coating film, a supply speed of the coating material, a drying temperature of the drying machine, an air volume of the drying machine, or drying according to the detected drying state. It is characterized in that one or more kinds of adjustment items are adjusted among the heater temperature of the machine or the feed speed in the dryer.

[0019]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) A dry state measuring apparatus according to Embodiment 1 of the present invention will be described with reference to FIG. The film A100 includes a transparent portion 102 made of a mixture of a transparent solvent and a transparent resin, and particles 1 unnecessary for the solvent.
01 is composed of a coating film 109 formed by uniformly applying a coating material comprising the mixture of No. 01 on a base film 108. A light projecting unit 103 is disposed above the film A100, and irradiates the film A100 with irradiation light A105. When the irradiation light A105 passes through the film A100, the particles 101
Or is scattered as scattered light 107, and a part of the light reaches the light receiving unit 104 placed below the film A100 as transmitted light.

Next, the operation of the dry state measuring device of FIG. 1 will be described. Irradiation light 1 applied to film A100
05 is always controlled to a constant intensity. Therefore, the intensity of the transmitted light 106 varies depending on the light absorption characteristics and scattering characteristics of the coating film 109 and the film thickness. When considering within the same lot, the thickness fluctuation of the coating film 109 is small in consideration of the accuracy of the current coating machine. Therefore, the temporal fluctuation factors of the transmitted light 106 are mainly the light absorption characteristics of the particles 109 in the coating film 109 and the scattering characteristics of the particles 101 on the interface between the transparent portion 102 and the transparent portion 102 and on the surface of the coating film 109. Coating film 10
9, the periphery of the particle 101 is transparent part 1
Since the particles 101 are covered with the particles 02 and are insoluble in the solvent contained in the transparent portion 102, the temporal fluctuation of light absorption by the particles 101 can be ignored. Finally, the fluctuation of the transmitted light 106 depends only on the change of the scattering characteristic in the transparent portion 102.

Considering the scattering related to the transparent portion 102 in detail, (1) the interface between the particles 101 and a binder (not shown) included in the transparent portion 102, and (2) the solvent contained in the transparent portion 102 (see FIG. (3) The interface between the air layer and the binder generated by evaporation of the binder (not shown). (3) The three main factors are the unevenness of the coating film surface caused by the evaporation of the solvent in the surface layer of the coating film 109. In this, (1)
Since is substantially stable in time, (2) and (3) greatly fluctuate in time, and the scattering intensity substantially depends only on the evaporation of the solvent. The temporal change in the intensity of the transmitted light 106 is as shown in the graph of FIG. After the temperature of the solvent increases, the evaporation proceeds with time, and the transmitted light intensity decreases. Thereafter, as the drying approaches the end, the change in the transmitted light intensity becomes slow and becomes constant after the end of the drying.

By applying the above principle, the temporal change of the transmitted light 106 of the film A 100 during drying shown in FIG. 2 is tracked, and the drying is completed when the change of the transmitted light intensity within a certain time becomes less than a certain value. Is detected.

In this example, the change in the transmittance intensity within a certain period of time is used as the evaluation function. However, when the transmittance intensity itself becomes a certain value or less, the drying can be terminated. However, in this case, it becomes more sensitive to changes in the film thickness and the type of coating film, so that it is necessary to calibrate using a highly accurate calibration curve.

(Embodiment 2) A dry state measuring apparatus according to Embodiment 2 of the present invention will be described with reference to FIG. The film A100 is exactly the same as that described in the first embodiment. The difference is that the light emitting means 103 is
09 and the light receiving means 104
And is arranged so as to be inclined so as to face the light projecting means 103. The irradiation light 105 is irradiated from the light projecting means 103, is reflected by the surface of the coating film 109, and is reflected by the reflected light 202.
And reaches the light receiving means 104. The scattered light 201 is generated when the irradiation light 105 is reflected on the surface of the coating film 109.

Next, the operation of the dry state measuring device of FIG. 3 will be described. As in the first embodiment, the light projecting means 103 is controlled to emit irradiation light 105 having a constant intensity. Therefore, the intensity of the reflected light 202 reaching the light receiving unit 104 is obtained by subtracting the loss due to the absorption and scattering in the coating film 109. The generation of scattering and absorption is exactly the same as in the first embodiment. Therefore, the temporal change in the intensity of the reflected light 202 is mainly caused by the scattering characteristics of the coating film 109. As described in Embodiment 1, the scattering intensity of the scattered light 201 also increases as the drying of the solvent progresses because the air layer increases in the transparent portion 102 in the coating film 109. Therefore, since the loss due to scattering increases, the reflected light 202 decreases with time as shown in FIG.

By applying the above principle, as in the first embodiment, the temporal change of the reflected light 202 of the film A100 during drying shown in FIG. 4 is tracked, and the change of the transmitted light intensity within a fixed time is a constant value. The end of drying is detected when the following occurs.

Since the first embodiment utilizes transmitted light, it can be applied only when the base film is transparent.
In the second embodiment, a base film such as a metal foil can be used.

(Embodiment 3) A dry state measuring apparatus according to Embodiment 3 of the present invention will be described with reference to FIG. The film A100 is exactly the same as that described in the first and second embodiments. Further, the positional relationship among the film A100, the light projecting means 103, and the array type light receiving means 304 is the same as in FIG. 3 described in the second embodiment. The difference is that a slit plate 301 is provided on the entire surface of the light projecting means 103 and that the light receiving means 204 is an array-type element composed of a plurality (three in this embodiment). Slit plate 30
1 is provided with a cross slit, and the irradiation light 106 irradiates the coating film 109 only at a portion passing through the cross slit.

Next, the operation of the dry state measuring device of FIG. 5 will be described. Light emitting means 1 for film A100
From 03, the irradiation light 105 is irradiated through the slit plate 301. In this case, the slit plate 30
One projected image 302 appears. FIG. 6 is an enlarged view of the projection image 302. When the projected image 302 is viewed from above, the slit plate 3
The slit transmitting portion 305 is directly illuminated by the irradiation light 106 passing through the cross slit No. 01, and the bleeding portion 306 is seen where the light of the slit transmitting portion 305 is scattered on the surface of the coating film 109. Regarding the brightness, the slit transmitting portion 305 is the brightest, and the bleeding portion 306 is bright. Considering this in terms of the intensity of the reflected light 303, the reflected light 303b from the slit transmitting portion 305 is relatively strong, and the reflected lights 303a and 303c from the bleeding portion 306 are weak. If the surface of the coating film 109 is very smooth, there is no bleeding portion 306, or even if there is, the bleeding portion 306 is very small.
03b is very strong, and the reflected light 303a, 303c has a value close to zero.

Here, the scattering characteristic with respect to the reflection of the coating film 109 can be specified in a normalized form by the ratio between the brightness of the slit transmitting portion 305 and the brightness of the bleeding portion 306. Specifically, an array type light receiving means 304 using a light receiving element having excellent directivity is formed, and reflected light 3
03b is mainly detected by the B light receiving element, and the reflected lights 303a and 303c from the bleeding portion 306 are mainly detected by the A and C light receiving elements. After that, by dividing the detection intensity of the light receiving elements A and C by the detection intensity of the light receiving element B, an evaluation function indicating the scattering property of the coating film 109 is obtained.

Regarding the scattering property of the coating film 109, as described in the first and second embodiments, since the solvent evaporates with the passage of time, the scattering property becomes strong. Therefore, (brightness of bleeding portion) / (brightness of slit transmitting portion) has a shape as shown in FIG. Therefore, the temporal change of the brightness ratio is tracked, and the end of drying is detected when the brightness ratio exceeds a certain value.

As in the first and third embodiments, the end of drying can be detected when the change in the brightness ratio within a certain period of time falls below a certain value.

(Embodiment 4) A dry state measuring apparatus according to Embodiment 4 of the present invention will be described with reference to FIG. The configuration of the present embodiment is different from the first embodiment in that a two-dimensional array type light receiving unit 401 capable of acquiring planar optical information is used instead of the light receiving unit 104 in the first embodiment, and that the light projecting unit has less directivity. The point is to irradiate a sufficiently large film area with light. Other components are the same as in the first embodiment. The principle of detecting the dry state is exactly the same. By detecting the dry state two-dimensionally, the reliability of dry state detection can be greatly improved. That is, when detection is performed in a small area, it may not be possible to confirm whether or not the end of the object to be dried has been dried. However, such detection can be prevented by detecting the area.

FIG. 8 shows an example of the transmission type. However, even in the reflection type or the method using the brightness ratio due to scattering, a dry state can be detected in a planar manner by increasing the number of elements of the light receiving means. And the above advantages can be realized.

(Embodiment 5) A dry state measuring apparatus according to Embodiment 5 of the present invention will be described with reference to FIG. The dry state measuring means constituted by the light projecting means 103 and the light receiving means 104 is the same as that described in the first embodiment. The drying furnace 501 is a hot-air drying furnace, and has a hot-air discharge nozzle 504 and a suction nozzle 503 therein. Steam supplied from a boiler (not shown) is used as a heat source of the hot air. Film A100 in drying oven 501
Is sent by the roller conveyor 502.

Next, the operation of the dry state measuring device of FIG. 9 will be described. Film A sent inside drying oven 501
100 is heated and dried by hot air discharged from a hot air discharge nozzle 504 while being conveyed by a roller conveyor 502.
The solvent heated and evaporated by the hot air is discharged from the suction nozzle 503 together with the hot air, and is processed by a deodorizing device (not shown). Irradiation light 105 is emitted from the light projecting means 103 to the film A100 coming out of the drying furnace 501, and the transmitted light 106 is detected by the light receiving means 104. At this time,
Based on the change in the intensity of the transmitted light 106, the dry state of the coating film 109 of the film A100 is measured as described in Embodiment 1. Based on this result, the nozzle opening of the hot air discharge nozzle 504 and the feed speed of the roller conveyor 502 are changed to adjust the drying conditions to the optimum.

In this embodiment, an example of a transmitted light type dry state measuring apparatus has been described. However, the present invention can also be applied to a reflected light type or a method utilizing a brightness ratio due to scattering.

(Embodiment 6) A dry state measuring apparatus according to Embodiment 6 of the present invention will be described with reference to FIG. FIG. 10 shows a film dryer to which the drying state measuring device described in Embodiment 4 is applied. In the drying oven 501, a plurality (3 in FIG.
) Hot air discharge nozzles 504 are arranged,
03 are also arranged so as to face the hot air discharge nozzles 504 by the same number. Further, the drying furnace 501 has a roller conveyor 502, which conveys the film A100 to be dried.

Next, the operation of the dry state measuring device shown in FIG. 10 will be described. The film A100 sent into the drying furnace 501 is supplied to the roller conveyor 50 in the same manner as in the fifth embodiment.
While being conveyed by 2, hot drying is performed by hot air discharged from the hot air discharge nozzle 504. After that, it is carried out and the light emitting means 1
03, irradiation light 105 is emitted, and the transmitted light
Light is received by the dimensional array type light receiving means 401 and a planar dry state is detected. This two-dimensional array type light receiving means 401
It may be a CD or an image pickup tube. The opening degree of the hot air discharge nozzle 504 is changed according to the planar drying state detected by the two-dimensional array type light receiving unit 401 to adjust to the optimal drying state.

That is, when the drying of the front side of the coating film 109 is insufficient, the opening degree of the hot air discharge nozzle on the front side is widened to increase the air volume, and the drying capacity is partially increased. A uniform dry state can be realized. Further, when the intensity of the transmitted light 106 is extremely high in part,
In some cases, cracks or pinholes may occur in 09, and in this case, it may be possible to solve the problem by weakening the drying conditions. In such a case, the coating film 109 can also be used as a defect detector.

In this embodiment, an example of a transmitted light type dry state measuring apparatus has been described. However, the present invention can also be applied to a reflected light type or a method utilizing a brightness ratio due to scattering. However, it is sometimes difficult to detect a coating film defect in the reflected light method or the method using the brightness ratio due to scattering.

(Embodiment 7) A dry state measuring apparatus according to Embodiment 7 of the present invention will be described with reference to FIG. FIG. 11 shows a film dryer to which the drying state measuring device described in Embodiment 4 is applied. In the drying oven 501, a far infrared heater 601 made of ceramic is two-dimensionally arranged in parallel with the film A100. In addition, drying oven 5
01 has a roller conveyor 502, which conveys a film A100 to be dried.

Next, the operation of the dry state measuring device of FIG. 11 will be described. The film A100 sent into the drying furnace 501 is supplied to the roller conveyor 50 in the same manner as in the fifth embodiment.
While being conveyed by 2, the ink is heated and dried by infrared rays from the far-infrared heater 601. In addition, intake air from an air supply fan (not shown) is sent to the drying furnace 501, and the evaporated solvent vapor is exhausted. Thereafter, the film A100 is carried out, irradiated with irradiation light 105 from the light projecting means 103, and transmitted light 106 thereof.
Is received by the two-dimensional array type light receiving means 401 to detect a planar dry state. This two-dimensional array type light receiving means 401
May be a CCD or an image pickup tube.

The input power to the far-infrared heater is changed according to the planar drying state detected by the two-dimensional array type light receiving means 401, and the drying state is adjusted to the optimum. That is, the coating film 109
If the drying on the front side is insufficient, the current supplied to the row of the far-infrared heater 601 on the front side row is increased, the heater temperature is raised, and the drying capacity is partially increased. And a uniform dry state can be realized. Furthermore,
When the intensity of the transmitted light 106 is extremely large in part, cracks and pinholes may be generated in the coating film 109,
In this case, the problem can be solved by weakening the drying conditions, and in such a case, the film 109 can be used as a defect detector.

In the present embodiment, an example of the transmitted light type dry state measuring apparatus has been described. However, the present invention can also be applied to a reflected light type or a method using a brightness ratio by scattering. However, it is sometimes difficult to detect a coating film defect in the reflected light method or the method using the brightness ratio due to scattering.

(Eighth Embodiment) A multilayer ceramic electronic component according to an eighth embodiment of the present invention will be described with reference to FIG. FIG. 12 shows a sectional view of the multilayer ceramic electronic component. The multilayer ceramic electronic component 700 is prepared by drying and forming a film-like ceramic green sheet using the coating film dryer described in Embodiment 7, printing a printing electrode on the sheet, and stacking and sintering. Manufactured.

The outer shape of the multilayer ceramic electronic component 700 is a chip component. Surface pad 7 on the upper surface of the chip
04 is formed, and a lead electrode 702 for surface mounting is formed on the bottom surface of the chip. Most of the entire multilayer ceramic electronic component 700 is a ceramic portion 701,
Inside the ceramic portion 701, the internal electrodes 703 are arranged in a layer shape or a through hole shape connecting each layer. Various elements are formed inside the multilayer ceramic electronic component 700 by various arrangements of the internal electrodes 703.

As an example, a built-in capacitor section 705 is also formed and used to form a filter or the like with other elements. Since the filter characteristics are determined by the cut-off frequency, and the cut-off frequency is determined by the capacitance of the capacitor, the resistance value, and the inductance of the coil, high accuracy is required for the characteristic value of each element. The characteristics of each element are determined by the shape and area of the electrodes constituting the element and the distance between the electrodes. In the case of a laminated ceramic, the inter-electrode distance is controlled by stacking green sheets of which the thickness is controlled with high precision. Therefore, the state of the interface between the sheets at the time of lamination is very important.

There are several factors that determine the state of the interface, and the factors due to drying are particularly important. For example, if the drying speed is too fast, the surface of the green sheet becomes rough, so that the adhesiveness between the sheets at the time of lamination is reduced, which causes a variation in the capacity of the built-in capacitor unit 705.
In addition, if there is unevenness in the dry state, drying shrinkage can be biased, so that distortion occurs at the time of firing and variations in element characteristics occur. For this reason, by measuring the drying state and drying uniformly over the entire green sheet, the distance between the electrodes can be controlled with high accuracy, and distortion during firing can be eliminated, so that the filter characteristics of the multilayer ceramic electronic component 700 can be improved. Accuracy can be stabilized. In FIG. 12, the ceramic portion 701 is colored to make the drawing easier to understand, and the ceramic portion 701 also shows a cross section.

Next, the multilayer ceramic electronic component 700
A communication device, such as a mobile phone or a mobile terminal, which forms a transmission circuit or a reception circuit by using FIG. 13 will be described with reference to FIG. FIG. 13 is a block diagram illustrating a configuration of a communication device such as a mobile phone or a mobile terminal. As shown in FIG. 11, the communication device includes an antenna 802 and a transmission microphone 8.
03, a receiving speaker 804, and a user input means 805
, An audio processing circuit 808, a signal processing circuit 809, a transmission circuit 811, and a reception circuit 812.

Next, the operation of the communication device will be described. The analog audio signal input from the transmission microphone 803 is converted into a digital audio signal by the audio processing circuit 808, processed by the signal processing circuit 809, frequency-converted and modulated by the transmission circuit 811, and Are transmitted from the antenna 802 at a predetermined transmission output.

On the other hand, the signal received by the antenna 802 is subjected to frequency conversion and demodulation in a receiving circuit 812, a digital audio signal is extracted in a signal processing circuit 809, and converted into an analog audio signal in an audio processing circuit 808. Then, it is output from the receiving speaker 804. Control circuit 810
Controls the entire communication device. The user input means 805
This is a means for the user to input a destination dial or the like.

Here, the above multilayer ceramic electronic component 7
When 00 is used for the transmission circuit 811 or the reception circuit 812, the transmission circuit 811 or the reception circuit 812 has a very high-performance filter characteristic, so that the frequency used can be set to a narrow pitch when performing frequency conversion. Since the use frequency can be set to a narrow pitch, the use efficiency of radio waves can be improved.

Ninth Embodiment A coating machine according to a ninth embodiment of the present invention will be described with reference to FIG. Figure 1
Reference numeral 4 denotes a coating machine having a feedback control function based on the dried state of the coating film. FIG. 14 shows a transparent base film 108.
This is a die coat type coating machine that forms a coating film composed of a mixed composition of powder, resin, and solvent. The roll-shaped transparent base film 108 is attached to an unwind roll 900. The base film 108 is guided to a back roll via a free roll, and is provided with a first drying chamber 902 and a second drying chamber 903.
, And is taken up by a take-up roll 904 via a dry state measuring device 909. A die nozzle 905 is arranged near the back roll 901, and the paint in the paint tank 910 is supplied via a liquid feed pump 911 and a liquid feed pipe 912. Further, the first drying chamber 902 and the second drying chamber 90
3, an upper flow nozzle 907 and a lower flow nozzle 908 are attached.

Next, the operation of the coating machine will be described. The paint tank 910 is filled with a uniform paint composed of an organic solvent, a resin binder, and ceramic powder. The paint in the tank is supplied to the die nozzle 905 through the liquid supply pipe 912 at a constant flow rate by the liquid supply pump 911.
As the liquid sending pump used here, a mono pump or a precision gear pump capable of precisely controlling the flow rate is often used. The paint supplied to the die nozzle 905 is uniformly discharged in the width direction from the tip of the die nozzle 905.

On the other hand, the base film 108 wound on the unwinding roll 900 is transported by the back roll 901 with very high precision. When the base film 108 is on the back roll 901, the paint discharged from the die nozzle 905 is uniformly applied on the base film 108, and the WE
A T coating film is formed. The formed wet coating is the first
It is transported into the drying chamber 902 and the upper and lower flow nozzles 90
Hot air is blown from 7,908 to perform preliminary drying. Further, hot air is blown in the second drying chamber 903,
The drying step of the coating film is completed by the main drying.

The dried state of the film after the drying step is measured by the dry state measuring device 909. Here, the dry state is detected by the optical method described in the first to fourth embodiments. If drying is insufficient, the first and second
Feedback is applied from the drying state measuring device 909 so as to increase the temperature of the drying chamber or increase the amount of hot air to increase the drying capacity. If the drying capacity is already near the upper limit of the drying capacity and drying cannot be performed satisfactorily by controlling only the dryer, or if the coating film is cracked, reduce the film transport speed and further reduce the amount of paint to be dried. Feedback to improve the condition is applied to the entire coating machine from the dry condition measuring device 909. Cracks in the coating film that may occur here are detected by the dry state measuring device 909.

As described above, by applying feedback to the respective parts of the coating machine from the dry state measuring device 909 and controlling the coating film formation, it is possible to realize high-precision green sheet molding with a uniform dry state.

[0060]

As described above, according to the present invention, a light-transmitting solvent and a coating material containing at least a powder dispersed in the solvent are formed on a substrate by coating. The dried state of the applied coating film can be measured with high accuracy.

Further, by using the drying state measuring device according to the present invention in a coating film dryer, the drying is advanced while feeding back the drying state, so that the coating film can be uniformly dried.

Further, by forming a ceramic green sheet using the coating film dryer according to the present invention and forming a multilayer ceramic electronic component using this green sheet, the characteristics of the built-in element can be remarkably stabilized. Therefore, by forming a filter with this element and using it for a transmission / reception circuit of a mobile phone or a mobile terminal, a steep characteristic filter can be formed despite its small size and light weight, so that the set frequency of radio waves can be set to a narrow pitch, The use efficiency of the frequency band can be improved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a dry state measuring device according to a first embodiment of the present invention.

FIG. 2 is a characteristic diagram showing a transmitted light intensity change in the dry state measuring device according to the first embodiment of the present invention.

FIG. 3 is a configuration diagram of a dry state measuring device according to a second embodiment of the present invention.

FIG. 4 is a characteristic diagram showing a change in transmitted light intensity in the dry state measuring apparatus according to the second embodiment of the present invention.

FIG. 5 is a configuration diagram of a dry state measuring device according to a third embodiment of the present invention.

FIG. 6 is an enlarged view of a projected image in the dry state measuring device according to the third embodiment of the present invention.

FIG. 7 is a characteristic diagram showing a brightness ratio in the dry state measuring device according to the third embodiment of the present invention.

FIG. 8 is a configuration diagram of a dry state measuring device according to a fourth embodiment of the present invention.

FIG. 9 is a configuration diagram of a coating film dryer according to a fifth embodiment of the present invention.

FIG. 10 is a configuration diagram of a coating film dryer according to a sixth embodiment of the present invention.

FIG. 11 is a configuration diagram of a coating film dryer according to a seventh embodiment of the present invention.

FIG. 12 is a sectional view of a multilayer ceramic component according to an eighth embodiment of the present invention.

FIG. 13 is a configuration block diagram of a communication device according to an eighth embodiment of the present invention.

FIG. 14 is a configuration diagram of a coating machine according to a ninth embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 Film A 101 Particles 102 Transparent part, resin + solvent 103 Light emitting means 104 Light receiving means 105 Irradiation light 106 Transmitted light 107, 201 Scattered light 108 Base film 109 Coating film 202, 303 Reflected light 301 Slit plate 302 Projected image 304 Array Type light receiving means 305 slit transmitting part 306 bleeding part 401 two-dimensional array type light receiving means 501 drying oven 502 roller conveyor 503 intake nozzle 504 hot air discharge nozzle 700 laminated ceramic parts 701 ceramic part 702 lead electrode 703 internal electrode 704 surface layer pad 705 built-in capacitor part 802 antenna 803 transmitting microphone 804 receiving speaker 805 user input means 808 audio processing circuit 809 signal processing circuit 810 control circuit 811 transmitting circuit 812 receiving circuit

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B05D 5/06 B05D 5/06 C 7/00 7/00 A 7/24 301 7/24 301H F26B 21 / 00 F26B 21/00 A 23/04 23/04 B 25/00 25/00 A G01N 21/49 G01N 21/49 Z A 21/59 21/59 Z F term (reference) 2G059 AA05 BB06 BB09 BB10 BB15 DD16 EE01 EE02 FF04 GG00 KK01 KK04 MM09 3L113 AA02 AB02 AB06 AC01 AC10 AC31 AC48 AC49 AC50 BA26 BA32 CA20 CB01 CB06 CB21 CB23 CB25 DA11 DA24 DA25 4D075 AC56 AC72 AC80 AC84 AC94 AC95 AC96 BB24Z BB33ZBB37 BB33Z BB37 BB33ZBB BB33Z31 EA43 EC30 4F042 AA22 BA04 BA11 BA12 BA13 BA19 BA22 CA09 CB02 DB01 DB10 DB17 DB19 DB25 DB36 DB37 DC01 DF23 ED03 ED05 ED08

Claims (12)

[Claims] 1. A coating film formed by applying a light-transmitting solvent and a paint containing at least a powder dispersed in the solvent as a constituent element on a light-transmitting substrate. Light-emitting means for irradiating the material and the coating with light, and light-receiving means arranged on the opposite side to the light-emitting means with respect to the coating, and by reducing the amount of transmitted light received by the light-receiving means, A dry state measuring device for detecting a dry state of a coating film. 2. A coating film formed by applying a solvent having a light transmitting property and a coating material containing at least a powder dispersed in the solvent as a component on a substrate, and forming a coating film on the coating film side obliquely. Light emitting means for irradiating the coating film surface with light,
A light-receiving unit disposed on the same side as the light-projecting unit with respect to the coating film, wherein a drying state of the coating film is detected based on a decrease in the amount of reflected light received by the light-receiving unit. Condition measuring device. 3. A paint having at least a permeable solvent and a powder dispersed in the solvent as components.
In a coating film formed by applying on a substrate, a light projecting unit that irradiates the coating film surface with light from an oblique direction on the coating film side, and is disposed on the same side as the light projecting unit with respect to the coating film. A dry state measuring device for detecting the dry state of the coating film based on a change in a ratio of a directly reflected light amount and a reflected light amount due to surface scattering while the light receiving unit receives light. 4. A coating film dryer wherein a drying temperature or a feed speed of an object to be dried with respect to the dryer is adjusted based on the drying state information obtained by the drying state measuring device according to claim 1. . 5. A coating film formed by applying a solvent having a light transmitting property and a paint containing at least a powder dispersed in the solvent as a constituent element on a light transmitting substrate, wherein A light projecting means for irradiating light to the material and the coating film; and a light receiving means arranged in an array on the opposite side of the light emitting means with respect to the coating film. Wherein the in-plane distribution of the dried state of the coating film can be measured. 6. A coating film formed by applying a solvent having a light transmitting property and a coating material containing at least a powder dispersed in the solvent as a constituent element on a base material, wherein the coating film side oblique direction Light emitting means for irradiating the coating film surface with light,
A light-receiving means arranged in an array on the same side as the light-projecting means with respect to the coating film, imaging reflected light by the array-type light receiving means, and measuring an in-plane distribution of the coating film in a dry state; A dry state measuring device characterized in that it can be used. 7. A coating material comprising a solvent having permeability and a powder dispersed in the solvent as at least a constituent element.
In a coating film formed by applying on a base material, a light projecting unit that irradiates the coating film surface with light from an oblique direction on the coating film side, and an array type on the same side as the light projecting unit with respect to the coating film. The array type light receiving means receives light, and the change in the ratio of the amount of direct reflected light and the amount of reflected light due to surface scattering can be imaged, and the in-plane distribution of the dried state of the coating film can be measured. A dry state measuring device characterized by the above-mentioned. 8. A dry state measuring device according to claim 5, further comprising a heater arranged two-dimensionally in parallel with the coated surface, and a coated surface obtained from the dry state measured device. A coating film dryer wherein the individual temperatures of the heaters can be adjusted according to the inside drying state distribution information. 9. A drying state measuring device according to claim 5, further comprising a hot air blowing nozzle arranged in a width direction with respect to a feeding direction of the object to be dried, wherein the drying state measuring device is obtained from the drying state measuring device. A coating film dryer characterized in that the degree of opening and the blowing direction of the hot-air blowing nozzle can be adjusted based on the information on the in-plane drying state distribution of the coating film. 10. A multilayer ceramic electronic component produced using a green sheet produced using the coating film dryer according to any one of claims 4, 8, and 9. 11. A communication device comprising a transmission circuit or a reception circuit using the multilayer ceramic electronic component according to claim 10. 12. A coating film formed by applying a solvent having a light transmitting property and a coating material containing at least a powder dispersed in the solvent as a constituent element to a coating film formed on a base material. Light emitting means for irradiating light, light detecting means for detecting one or more kinds of light intensity of transmitted light, reflected light or scattered light by the irradiation light, and the coating film from a signal of the detected light intensity A drying state detecting means for detecting a drying state of the film, a coating film forming speed or a paint supplying speed, a drying temperature of a drying machine, an air flow rate of a drying machine, a heater temperature of a drying machine, or a temperature in a drying machine depending on the detected drying state. A coating machine which adjusts one or more kinds of adjustment items among feed speeds.