WO2014162707A1 - Method for manufacturing electronic component - Google Patents

Abstract

A method for manufacturing an electronic component provided with an electronic-component main unit in which an electronic-component element is impregnated with a liquid agent and either the liquid agent is retained or the electronic-component element is dried. Said method has the following steps: a step in which a liquid agent stored in a tank is intermittently discharged from a nozzle provided at one end of a pipe connected to said tank; and a step in which the liquid agent discharged from the nozzle is fed into a container and the aforementioned electronic-component element is immersed in the liquid agent accumulated in the container, thereby impregnating the electronic-component element with the liquid agent. This method also has a step in which light is continuously or periodically shone on one point along the path that the liquid agent discharged from the nozzle follows before reaching the container, a light sensor is used to detect the reflection or interruption of said light due to the liquid agent passing through the aforementioned point along the aforementioned path, and the lengths of time for which said light sensor detects the reflection or interruption of the light are added up in order to measure the amount of the liquid agent fed into the container.

Description

Manufacturing method of electronic parts

The present invention relates to a method for manufacturing electronic components used in various electronic devices, electrical devices, industrial devices, automotive devices and the like.

Recently, with the progress of digitalization of electronic devices and the like, smaller and thinner electronic components have been demanded. For example, a capacitor that is an electronic component used in a smoothing circuit or a control circuit is required to have a small size, a large capacity, and a low equivalent series resistance (hereinafter abbreviated as ESR) in a high frequency region. As a typical capacitor, there is an electrolytic capacitor using a driving electrolyte as an electrolyte. This type of electrolytic capacitor has a high ESR when the amount of the driving electrolyte is small, and also has a short life. Therefore, the smaller the size, the more important it is to control the amount of the driving electrolyte. It becomes. Especially in automotive electrical applications where high reliability is required, it is very important to manage the amount of liquid in each capacitor.

Here, FIG. 6 is a cross-sectional view showing a configuration of a wound aluminum electrolytic capacitor, which is an example of a conventional electronic component.

As shown in FIG. 6, this conventional wound aluminum electrolytic capacitor includes a capacitor element 52 which is a functional element, a pair of lead wires 51a and 51b each having one end connected to the capacitor element 52, and The lead wire 51a, 51b is composed of an outer package 55 in which the other end of the lead wires 51a and 51b is led out to seal the capacitor element 52 together with a driving electrolyte (not shown).

The exterior body 55 is a sealed body having a bottomed cylindrical exterior case 53 containing a capacitor element 52 impregnated with a driving electrolyte, and through holes 54a and 54b through which the lead wires 51a and 51b are inserted, respectively. 54. The sealing body 54 is disposed at the opening of the outer case 53 and seals the opening of the outer case 53 by being compressed and deformed by a drawing portion 53 a provided on the outer peripheral surface of the outer case 53. The sealing body 54 uses rubber packing.

As shown in FIG. 7, the capacitor element 52 is formed by laminating an anode foil 52a made of a valve metal such as aluminum and a cathode foil 52b made of a valve metal such as aluminum via a separator 52c. It is comprised by doing. The anode foil 52a is formed by roughening a foil made of a valve metal by an etching process, and a dielectric layer of an anodized film is formed on the surface by a chemical conversion process. The lead wires 51 a and 51 b have one end connected to the anode foil 52 a and the cathode foil 52 b, respectively, and the other end drawn from the same end surface of the capacitor element 52.

Next, a manufacturing method of the conventional capacitor configured as described above will be described.

First, as shown in FIG. 7, an anode foil 52a made of a valve metal such as aluminum having a dielectric layer of an anodized film on its surface, a cathode foil 52b, and a separator 52c are prepared. One end of the pair of lead wires 51a and 51b is connected to the anode foil 52a and the cathode foil 52b, respectively. The anode foil 52a and the cathode foil 52b are wound in a roll shape with the separator 52c interposed therebetween, and the capacitor element 52 is formed by winding and fixing the outer peripheral side surface with an insulating tape 52d.

Thereafter, the capacitor element 52 is accommodated in an aluminum outer case 53 into which a predetermined amount of driving electrolyte has been injected, and impregnated with the driving electrolyte.

As a conventional method of injecting the driving electrolyte into the outer case 53, the driving electrolyte is sucked up from the liquid tank by a pump, transported by piping such as a hose, and discharged from a nozzle attached to the tip of the piping. There is a method of injecting into the case 53.

Next, a rubber packing sealing member 54 is disposed in the opening of the outer case 53.

Thereafter, the opening portion of the outer case 53 is wound from the outer peripheral side surface to form the drawn portion 53a, and the outer case 53 is sealed.

Next, a voltage is applied between the lead wires 51a and 51b to perform re-formation (aging), thereby producing a capacitor.

Here, in the manufacturing process of the conventional capacitor, several methods are conceivable as a method for measuring the amount of the driving electrolyte. A general method is as follows. First, the weight of the empty exterior case 53 and the total weight of the driving electrolyte injected into the exterior case 53 are measured. Then, the weight of the driving electrolyte is calculated by subtracting the weight of the empty outer case 53 from the total weight.

However, when the measurement accuracy in the mg order is necessary for the weight measurement, the weight must be measured with a high-precision electronic balance. For this reason, this conventional method is susceptible to vibrations of mass production equipment for small electronic components that have recently been demanded, and it is difficult to follow the increase in equipment tact speed. Can not.

On the other hand, as another liquid weight measuring method, there is a method of measuring a total liquid amount by dropping a plurality of droplets from a nozzle and measuring a light shielding time by the droplets.

Also, as another liquid weight measuring method, there is a method in which liquid is dropped from a nozzle, liquid width data is sampled at a specified sampling time, and the total amount of liquid discharged is measured by a light shielding time.

For example, Patent Documents 1 and 2 are known as prior art document information related to the invention of this application.

JP 2005-140514 A JP-A-5-248899

However, there is a problem with the above-described conventional liquid amount measurement method for an electronic component that contains a liquid typified by a driving electrolyte, such as the above-described conventional capacitor.

First, the liquid volume measurement method disclosed in Patent Document 1 has the following problems. (1) As shown in FIG. 5, since the relational expression between the liquid volume and the light shielding time is not linear, the conversion formula for converting the light shielding time into the liquid amount becomes complicated. (2) If the viscosity or surface tension of the liquid changes due to temperature change or liquid type, the volume of one drop changes and the conversion formula changes. (3) Since it drops, it takes time to discharge a specified amount, and productivity cannot be increased.

Further, the liquid amount management method disclosed in Patent Document 2 has the following problems. (1) A one-dimensional (line) sensor for measuring liquid width data is required. (2) An advanced calculation function is required to calculate the liquid amount from the time data and the liquid width data. (3) Even if air bubbles accumulated in the pipe or hose are contained in the discharge liquid, it is measured as a liquid volume, and an accurate liquid volume cannot be measured. Furthermore, when liquid is continuously discharged using a pump, small bubbles in the liquid are accumulated in the pipe, hose wall surface, and pump to form large bubbles having a diameter of about 1 to 3 mm. When these large bubbles are discharged together with the liquid, there is a problem that the amount of discharged liquid is reduced by 1 to 9 μL even if a pump with repeated high discharge accuracy is used. As a result, the subject that the lifetime of an electronic component becomes short arises.

Therefore, the present invention solves such a conventional problem, and with a simple configuration, a liquid of a discharge liquid that can measure an accurate liquid amount on the order of mg or mL online regardless of the viscosity of the liquid or bubbles in the liquid. Provide a quantity measurement method. Furthermore, by using this method, a method for manufacturing an electronic component that has high reliability and can improve productivity is provided.

In order to achieve the above object, the present invention provides an electronic component manufacturing method including an electronic component body in which an electronic component element is impregnated with a liquid agent and held or dried, and the liquid agent stored in a tank is supplied to the tank. A step of intermittently discharging from a nozzle provided at one end of a pipe to be connected, injecting a liquid agent discharged from the nozzle into a container, and immersing the electronic component element in the liquid agent accumulated in the container; A step of impregnating the electronic component element with the liquid agent, and continuously or periodically irradiating light to one point in the path until the liquid agent discharged from the nozzle arrives at the container, By detecting the reflection or blocking of the light by passing through the one point in the path with an optical sensor, and integrating the length of time when the optical sensor detects the reflection or blocking of the light, the container The step of measuring the amount of injected liquid is further provided a method of manufacturing an electronic component.

The present invention also relates to a method of manufacturing an electronic component including an electronic component body in which an electronic component element is impregnated with a liquid agent and held or dried, and the liquid agent stored in the tank is attached to a tip of a pipe connected to the tank. A liquid agent discharged from the nozzle, comprising: a step of discharging from the provided nozzle; and a step of impregnating the electronic component element with the liquid agent by injecting the liquid agent discharged from the nozzle into the electronic component element Continuously or periodically irradiates light at one point in the path until the electronic component element reaches the electronic component element, and the liquid agent passes through the one point in the path to reflect or block the light. A step of measuring the amount of the liquid agent injected into the electronic component element by integrating the length of time detected by the sensor and the optical sensor detecting the reflection or blocking of the light. It is a method of manufacturing a child parts.

According to the present invention, there is provided an electronic component manufacturing method that stabilizes electrical characteristics and improves productivity by measuring the amount of discharged liquid with high accuracy.

It is a block diagram of the liquid quantity measuring device of the discharge liquid by Embodiment 1 of this invention. FIG. 4A is a discharge state diagram when bubbles are not included in the discharge liquid, and FIG. 3B is a discharge state diagram when bubbles are included in the discharge liquid. (A) Timing chart for detecting discharge liquid when bubbles are not included in the discharge liquid by an optical sensor, (B) Timing chart for detecting discharge liquid when bubbles are included in the discharge liquid by an optical sensor. It is sectional drawing which showed the structure of the winding type aluminum electrolytic capacitor which is an example of the electronic component in Embodiment 2 of this invention. It is an expansion | deployment perspective view of the capacitor | condenser element of the same volume type aluminum electrolytic capacitor. It is sectional drawing which showed the structure of the wound aluminum electrolytic capacitor which is an example of the conventional electronic component. It is a development perspective view of the capacitor element of the conventional winding type aluminum electrolytic capacitor.

(Embodiment 1)
A liquid amount measuring device and a liquid amount measuring method for discharged liquid according to the first embodiment will be described.

FIG. 1 is a configuration diagram of a liquid volume measuring device for discharged liquid according to Embodiment 1 of the present invention.

FIG. 2A is a discharge state diagram when bubbles are not included in the discharge liquid, and FIG. 2B is a discharge state diagram when bubbles are included in the discharge liquid.

FIG. 3A is a timing chart for detecting the discharge liquid when the discharge liquid does not contain bubbles by an optical sensor, and FIG. 3B shows the discharge liquid when the discharge liquid contains bubbles as light. It is a timing chart figure detected with a sensor.

First, in FIG. 1, an apparatus for measuring the amount of discharged liquid includes a liquid tank 1 that stores liquid, a pump 3 that sucks up a predetermined amount of liquid 2 stored in the liquid tank 1, and the pump 3. A pipe 4 that feeds the sucked liquid 2 and a nozzle 5 that is attached to the tip of the pipe 4 and discharges a predetermined amount of the liquid 2 sucked up by the pump 3 in a substantially cylindrical shape. Further, the discharge liquid amount measuring device irradiates light to the path through which the discharge liquid 6 discharged from the nozzle 5 passes, and detects the reflected light of the discharge liquid 6 that has passed through the light irradiation range. And a sensor 9. In addition, the liquid volume measuring device for the discharged liquid is synchronized with a predetermined clock pulse 10, with one cycle as one count, a counter 11 that counts only when the reflected light is detected, the total number of counts, and per count On the basis of the liquid volume of the liquid and the specific gravity information of the liquid, a calculation unit 13 for calculating the weight of the discharge liquid 6, a display unit 14 for displaying the weight value of the discharge liquid 6 calculated by the calculation unit 13, and the calculated discharge And a sorting device 15 that performs pass / fail sorting based on the weight value of the liquid 6.

The calculation unit 13 can set and input information necessary for calculation, for example, a predetermined volume value of liquid discharged in one cycle (when bubbles are not included), a specific gravity value of liquid, and the like from the input unit 12 in advance. . If the setting is input in this way, it is possible to easily cope with the change of the liquid type, and the productivity can be improved.

As a method for measuring the amount of discharged liquid using the above apparatus, first, the liquid 2 stored in the liquid tank 1 is sucked up by a pump 3 and sent to the pipe 4. Then, the liquid 2 is extruded as a discharge liquid 6 from a nozzle 5 attached to the tip of the pipe 4 and injected into a case 7 (such as an exterior case of an electronic component). The discharge liquid 6 is preferably discharged substantially intermittently, that is, intermittently, rather than being discontinuously discharged like a droplet.

Note that the discharge liquid 6 can be discharged intermittently by adjusting the diameter of the pipe 4, the diameter of the nozzle 5, the discharge speed, and the like.

Next, light is continuously or periodically irradiated to one point in the path through which the discharge liquid 6 passes toward the case 7. This light is reflected by the discharge liquid 6 that has passed through one point in the path, and this reflected light is detected by the optical sensor 9. Instead of detecting the reflected light with the optical sensor 9, the optical sensor that detects the light passing through one point in the path cuts off the light due to the discharge liquid 6 passing through one point in the path. You may detect with an optical sensor.

Then, the optical sensor 9 integrates the length of the detected time with the detection of reflection or blocking of the light. For example, the number of counts detected by the optical sensor 9 may be integrated using a counter 11 that is synchronized with the predetermined clock pulse 10 and has one cycle as one count.

It should be noted that the discharge liquid 6 may be detected by combining the lens 8 having the detection portion narrowed down to the same range as the diameter of the discharge liquid 6 and the optical sensor 9. As the optical sensor 9, a reflective optical sensor is preferable.

Thereafter, the amount of the discharge liquid 6 is calculated based on the accumulated time detected by the optical sensor 9. For example, the weight of the discharge liquid 6 may be calculated by the calculation unit 13 based on the total number of counts, the volume of discharge liquid per count, and the specific gravity information of the liquid.

It should be noted that information on the volume and weight of the liquid necessary for calculation in the calculation unit 13 may be input from the input unit 12.

Next, the calculated amount of the discharge liquid 6 is displayed on the display unit 14. Then, it is determined whether the calculated amount of the discharge liquid 6 is within the standard, and the sorting device 15 performs OK or NG selection on the case 7 into which the discharge liquid 6 has been injected.

In the above configuration, the liquid amount per count can be calculated by dividing the input liquid amount value (discharged in one cycle) by the count number. By multiplying the liquid amount by the count number of the counter, the discharged liquid amount can be calculated each time. As the pulse for counting up is shorter, the amount of liquid can be measured with higher accuracy. By counting 1000 pulses in one cycle of discharge, it is possible to detect even with an accuracy of 0.1% of the discharge amount. In this case, for example, in a pump that discharges 100 μL in one cycle, it is possible to measure to an accuracy of 0.1 μL.

According to the present invention, even if the amount of liquid or the viscosity of the liquid is changed, the conversion formula can be simplified because the information detected by the optical sensor 9 is used to convert the liquid weight.

It should be noted that the liquid volume can be converted from weight to volume as required and displayed on the display unit 14 by inputting the specific gravity information of the liquid from the input unit 12 in advance.

Further, the liquid is intermittently discharged by a predetermined amount, and reflection or blocking of the light irradiated to the discharge liquid 6 is detected by the optical sensor 9. At the same time, in synchronization with the predetermined clock pulse 10, one cycle is counted as one count, and counting is performed only when the reflection or blocking of the light is detected. Therefore, even if the viscosity or surface tension of the liquid changes depending on the temperature change or liquid type, the same conversion formula can be applied and is reasonable.

Also, since it can be forcibly discharged by the pump 3 instead of dripping, the production tact can be increased.

Also, since the liquid is intermittently discharged, the liquid amount of the discharged liquid can be measured with high accuracy if there is an integration time detected by the optical sensor 9 and a liquid amount discharged per unit time. As a result, an advanced calculation function used to measure the amount of discontinuous discharged liquid such as droplets is no longer necessary.

Next, the operation of the liquid amount discharge measuring device depending on the presence or absence of bubbles in the discharged liquid will be described.

First, as shown in FIG. 2A, the liquid 2 is discharged from the liquid tank 1 by the pump 3 and the discharge liquid 6 is discharged from the nozzle 5 through the pipe 4 such as a pipe or a hose. The discharge liquid 6 is a substantially cylindrical shape continuous from A to D, that is, an intermittent discharge liquid 6. When the discharge liquid 6 is discharged, the discharge liquid is detected by the optical sensor 9 and the light that has been narrowed by the lens 8 within the same range as the diameter of the discharge shape.

In this case, the counter counts clock pulses only when the optical sensor 9 detects the discharge liquid 6, and therefore, for example, 10 is counted between A and D as shown in FIG.

On the other hand, FIG. 2B shows a case where bubbles are included in the discharged liquid. In this case, the pipe 4 or the nozzle 5 is provided with a small-diameter portion whose inner diameter is adjusted to be small in advance so that the discharged liquid is interrupted at the bubble portion. For example, when a driving electrolyte containing an organic solvent such as γ-butyrolactone, sulfolane, or ethylene glycol as a main solvent is used, the liquid 2 sucked up from the liquid tank 1 has a volume when it is sent to the pipe 4. It may contain 1 to 3 mm ³ of bubbles 16. Here, when the area of the discharge hole of the nozzle 5 is reduced to 0.2 mm ² to 1.5 mm ² , the discharge liquid is interrupted into two discharge liquids 26 between A and B and discharge liquid 36 between C and D. To discharge. Note that the liquid agent is not discharged between B and C due to bubble discharge.

In this case, as shown in FIG. 3 (B), a total of 8 counters are counted, 4 pulses between A and B and 4 pulses between C and D.

In the above example, when the bubbles are not included in the discharged liquid, 10 is counted, and when bubbles are included, 8 is counted. Therefore, when bubbles are included, the amount of bubbles can be removed and the amount of liquid can be measured, so that the amount of liquid can be measured with high accuracy.

In addition, when the liquid is discharged in a state where excess liquid adheres to the nozzle, the substantially cylindrical liquid column becomes longer than A to D, and thus the count number increases.

When the liquid is water, the bubble detection power corresponds to 1 μL of bubbles of 1 mm ³ and 1 mg in the gravimetric method. In the configuration of the present invention, a finer bubble can be detected as the tip of the nozzle is thinner. For example, a nozzle diameter that can detect 1/100 of the discharge amount is preferable.

For example, when the liquid volume of the discharge liquid is 100 μL, when the nozzle opening diameter is 1.0 mm ² , the discharge liquid has an interval of 1 mm. The counter pulse may be set to a period in which this interval can be detected.

As described above, there is an effect that the μL level can be accurately measured by the liquid volume measuring device and the liquid volume measuring method of the discharge liquid according to the first embodiment.

From the above, by manufacturing an electronic component using the discharge liquid volume measuring method of the first embodiment, the liquid volume can be measured with high accuracy, and the electrical characteristics are stabilized and highly reliable. it can. Furthermore, productivity can be improved.

(Embodiment 2)
A method for manufacturing an electronic component according to an embodiment of the present invention will be described.

FIG. 4 is a cross-sectional view showing a configuration of a wound aluminum electrolytic capacitor that is an example of an electronic component according to Embodiment 2 of the present invention. FIG. 5 is an exploded perspective view of the capacitor element of the wound aluminum electrolytic capacitor.

First, the configuration of a wound aluminum electrolytic capacitor, which is an example of an electronic component according to an embodiment of the present invention, will be described with reference to FIGS.

As shown in FIG. 4, the wound aluminum electrolytic capacitor of the present invention includes a capacitor element 42 that is an electronic component element, and a pair of lead wires 41 a and 41 b each having one end connected to the capacitor element 42. The lead wire 41a, 41b is composed of an outer package 45 in which the other end portion is led out and the capacitor element 42 is sealed together with a driving electrolyte (not shown).

The exterior body 45 includes a bottomed cylindrical exterior case 43 that is a container containing a capacitor element 42 impregnated with a driving electrolyte, and through holes 44a and 44b through which the lead wires 41a and 41b are inserted, respectively. And a sealing body 44 having the same. The sealing body 44 is disposed at the opening of the outer case 43 and seals the opening of the outer case 43 by squeezing with a drawing portion 43 a provided on the outer peripheral surface of the outer case 43.

The sealing body 44 can be made of a rubber material such as EPT or IIR, or a resin material such as an epoxy resin.

As shown in FIG. 5, the capacitor element 42 is formed by winding an anode foil 42a made of a valve metal such as aluminum and a cathode foil 42b made of a valve metal such as aluminum via a separator 42c. ing. The anode foil 42a has a white surface made of a valve metal roughened by an etching process, and a dielectric layer of an anodized film is formed on the surface by a chemical conversion process. The lead wires 41 a and 41 b have one end connected to the anode foil 42 a and the cathode foil 42 b, respectively, and the other end drawn from the same end surface of the capacitor element 42.

In addition, the electrode which comprises the capacitor | condenser element 42 may be the structure which laminates | stacks several electrode foil other than winding electrode foil.

The separator 42c, which is one of the components of the capacitor element 42, is made of cellulose, craft, polyethylene terephthalate, polybutylene terephthalate, polyphenylene sulfide, nylon, aromatic polyamide, polyimide, polyamideimide, polyetherimide. A nonwoven fabric containing rayon, vitreous or the like can be used.

Also, the driving electrolyte is configured to dissolve a solute in a solvent. Examples of the solvent material include γ-butyrolactone, ethylene glycol, sulfolane and the like. Solute materials include inorganic acid ammonium salts, inorganic acid amine salts, inorganic acid alkyl-substituted amidine salts or quaternized products thereof, organic acid ammonium salts, organic acid amine salts, organic acid alkyl-substituted amidine salts or quaternized products thereof. Etc.

The driving electrolyte may appropriately contain additives for the purposes of gas absorption, stabilization of withstand voltage, pH adjustment, oxidation prevention, and the like.

Next, a method for manufacturing a wound aluminum electrolytic capacitor, which is an example of an electronic component in the embodiment configured as described above, will be described with reference to FIGS.

First, an anode foil 42a made of a valve metal such as aluminum having a dielectric layer of an anodized film on its surface, a cathode foil 42b, and a separator 42c are cut into a certain width and length. One end of each of the pair of lead wires 41a and 41b is connected to the anode foil 42a and the cathode foil 42b by a method such as caulking or ultrasonic wave, respectively. Thereafter, the separator 42c is interposed between the anode foil 42a and the cathode foil 42b, and then wound. Then, the outer peripheral side surface is scratched and fixed by the insulating tape 42d, and the capacitor element 42 is formed.

In addition, the surface area of the surface of the anode foil 42a is appropriately enlarged by etching, vapor deposition of metal particles, or the like. The dielectric layer is formed as an anodic oxide film by anodizing a valve metal such as aluminum which is an electrode material. Further, a dielectric layer may be formed on the electrode material by vapor deposition or coating.

Thereafter, the capacitor element 42 may be immersed in a chemical conversion solution, and a voltage may be applied between the lead wires 41a and 41b to repair and form the oxide film on the surface of the anode foil 42a.

Next, the pair of lead wires 41 a and 41 b drawn from the capacitor element 42 are inserted into the pair of through holes 44 a and 44 b provided in the sealing body 44, respectively, and the sealing body 44 is attached to the capacitor element 42.

The sealing body 44 may be attached before the capacitor element 42 is immersed in the chemical conversion liquid.

Next, the capacitor element 42 is accommodated in the outer case 43 together with the driving electrolyte, and the sealing body 44 is disposed in the opening of the outer case 43.

As a method of impregnating the capacitor element 42 with the driving electrolyte, a predetermined amount of the driving electrolyte is injected into the outer case 43 in advance, and the capacitor element 42 is accommodated in the outer case 43.

Here, as a method for injecting a certain amount of the driving electrolyte into the outer case 43, the method for measuring the amount of discharged liquid in the first embodiment is applied.

Next, the opening portion of the outer case 43 is sealed by winding the outer peripheral side surface of the outer case 43 to form the drawn portion 43a.

Note that an insulating exterior resin made of epoxy resin or the like is used as the exterior body 45 to cover the capacitor element 42 and lead out the other end of the lead wires 41a and 41b to the outside of the exterior material. Also good.

An insulating terminal plate (not shown) is disposed in contact with the opening of the outer case 43, and a pair of lead wires 41a and 41b led out from the outer surface of the sealing body 44 that seals the opening of the outer case 43. Are inserted into a pair of through holes (not shown) provided in the insulated terminal plate, and then the lead wires 41a and 41b are bent at substantially right angles in directions opposite to each other, It may be housed in a groove (not shown) provided on the outer surface to be a surface mount type electrolytic capacitor.

In addition, after sealing the opening part of the exterior case 43 or attaching the insulating terminal plate, a voltage is appropriately applied between the lead wires 41a and 41b to perform re-forming.

As described above, according to the method for manufacturing a wound aluminum electrolytic capacitor that is an example of the electronic component according to the second embodiment of the present invention, the amount of liquid can be measured with high accuracy, and the electrical characteristics can be stabilized. High reliability can be achieved. Furthermore, productivity can be improved.

The liquid volume measuring device and liquid volume measuring method of the present invention, and the electronic component manufacturing method using the liquid volume measuring method are characterized in that the liquid volume can be measured with high accuracy, and can be used for a long time. This is useful for a method of manufacturing an electronic component that is applied to a smoothing circuit and a control circuit on the power output side of AV equipment and automobile electrical equipment that require high reliability.

DESCRIPTION OF SYMBOLS 1 Liquid tank 2 Liquid 3 Pump 4 Piping 5 Nozzle 6 Discharge liquid 7 Case 8 Lens 9 Optical sensor 10 Clock pulse 11 Counter 12 Input part 13 Calculation part 14 Display part 15 Sorting device 16 Bubble 26, 36 Discharge liquid 41a, 41b Lead wire 42 Capacitor element 42a Anode foil 42b Cathode foil 42c Separator 42d Insulating tape 43 Outer case 43a Drawing part 44 Sealing body 44a, 44b Through hole 45 Outer body

Claims (5)

1. A method of manufacturing an electronic component comprising an electronic component body that is held or dried by impregnating an electronic component element with a liquid agent,
   A step of intermittently discharging the liquid agent stored in the tank from a nozzle provided at one end of a pipe connected to the tank;
   Injecting the liquid agent discharged from the nozzle into a container and immersing the electronic component element in the liquid agent accumulated in the container, and impregnating the electronic component element with the liquid agent,
   Light is continuously or periodically irradiated to one point in the path until the liquid agent discharged from the nozzle arrives at the container, and the liquid agent passes through the one point in the path. An electron further comprising a step of measuring the amount of liquid injected into the container by detecting reflection or blocking with an optical sensor and integrating the length of time when the optical sensor detects reflection or blocking of the light. A manufacturing method for parts.
2. A method of manufacturing an electronic component comprising an electronic component body that is held or dried by impregnating an electronic component element with a liquid agent,
   Discharging the liquid agent stored in the tank from a nozzle provided at the tip of a pipe connected to the tank; and
   A step of impregnating the electronic component element with the liquid agent by injecting the liquid agent discharged from the nozzle into the electronic component element;
   By continuously or periodically irradiating one point in the path until the liquid discharged from the nozzle reaches the electronic component element, the liquid passes through the one point in the path. A step of measuring the amount of liquid injected into the electronic component element by detecting reflection or blocking of light by an optical sensor and integrating the length of time when the optical sensor detects reflection or blocking of the light An electronic component manufacturing method further comprising:
3. 3. The method of manufacturing an electronic component according to claim 1, wherein the pipe or the nozzle is provided with a small-diameter portion that converts bubbles in the liquid into an interruption in the discharge of the liquid.
4. The electronic component element comprises a capacitor element in which an anode foil having a dielectric film and a counter cathode foil are wound through a separator,
   The liquid agent comprises a solution containing a solvent containing γ-butyrolactone, sulfolane or ethylene glycol, and a solute that ionizes in the solvent,
   The method of manufacturing an electronic component according to claim 3, wherein the small diameter portion provided in the pipe or the nozzle has a liquid agent passage cross-sectional area of 0.2 mm2 to 1.5 mm2.
5. The time length when the photosensor detects the reflection or blocking of the light is integrated by counting the number of clock pulses when the photosensor is detecting the reflected light. The manufacturing method of the electronic component of 3 or 4.

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