JPH10116844A - Potting resin applying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect changes in application amount and abnormality of resin, by providing a thrust part with a weight measurement device, and by measuring the weight of a resin-coated object at thrusting. SOLUTION: A thrust part 7 thrusts a line sensor 1 from below at resin application for the height of the line sensor 1 to be a height set to be appropriate for resin sealing. When the thrust part 7 thrusts the line sensor 1, the weight of the line sensor 1 is possible to be measured with a weight measurement device 9 provided at the thrust part 7. With a weight of the line sensor 1 measured in advance, a transparent resin 8 is dripped from a dispenser nozzle 6. After the dripping, the weight of the line sensor 1 is measured again, and the measured value before dripping is subtracted from that measurement value, so that it is judged if a subtracted value, in other word, the weight of the drip resin 8 is within a preset allowable range, and if it is not within the range, the operation of a potting resin application device is stopped, and a warning is issued to an operator.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a potting resin coating apparatus, and more particularly to a resin coating object which is conveyed by a carrier. The present invention relates to a potting resin coating device for applying by dropping.

[0002]

2. Description of the Related Art As a line sensor, an extremely elongated solid-state imaging device is housed in a package made of, for example, resin.
In some cases, a transparent resin is applied instead of glass sealing to seal the resin. A potting resin application device is used for applying the transparent resin. FIG. 2 (A), (B)
FIG. 3 is an explanatory view of application of a transparent resin by a conventional potting resin application device. In the drawing, 1 is a line sensor whose front side is sealed with a transparent resin, and 2 is its package, in which a solid-state imaging device not appearing in the drawing is housed at the bottom.
Reference numerals 3, 3,... Indicate leads, and reference numeral 4 indicates a step on the inner surface of the package 2.

[0005] 5 is a carrier for carrying the line sensor 1,
Reference numeral 6 denotes a dispenser nozzle for dropping resin from a resin tank and a syringe (not shown). Reference numeral 7 denotes a push-up portion which pushes up the line sensor 1 from below at the time of applying the resin, and sets the height of the line sensor 1 to a height set as appropriate for resin sealing.

The coating sections shown in FIG. 2 are arranged in a plurality of rows, for example, 5 rows, to form one potting resin coating apparatus. Each coating section operates simultaneously so that coating is performed at five locations in parallel. Has been.

Normally, as shown in FIG. 2A, the push-up portion 7 is located below the carrier 5, and the dispenser nozzle 6 is in a state where the transparent resin (8) is not dropped. Then, when the transparent resin uncoated line sensor 1 is carried by the carrier 5 below the dispenser nozzle 6 at the coating position, the push-up portion 7 is raised to move the line sensor 1 to the transparent resin, as shown in FIG. The resin is pushed up to a position set in advance as a height suitable for the application of (8), and in that state, the transparent resin 8 is dropped from the dispenser nozzle 6 to perform sealing. When the dropping is completed, the push-up portion 7 descends to its original position, and the line sensor, whose resin sealing has been completed by the carrier 5, is discharged from the potting resin application device and subjected to a curing process.

[0006]

However, conventionally, even if the supply amount of the transparent resin 8 to the line sensor 1 changes, it cannot be detected, so that the resin does not protrude sufficiently or the resin amount is insufficient. This causes a large amount of defects such as protrusion of the bonding wire due to the occurrence of the problem.
In other words, there are a plurality of, for example, five line sensors 1 per potting resin coating device, and the amount of resin supply per one time is independently adjusted. Varies for various reasons. The cause may be a change over time in the viscosity of the resin, a change in the original pressure, or the like.

Since it was not possible to detect a change in the supply amount, it was finally discovered that a defect due to a change in the amount of the resin occurred after the curing of the encapsulating transparent resin. In some cases, defective products were produced, resulting in large losses.

[0008] Even if the lot of the resin is the same, it is impossible to add the resin in the middle due to the change in the viscosity of the resin with the passage of time.

Further, conventionally, the remaining amount of the resin in the resin supply syringe of the potting resin application device becomes small, and even if the resin runs out, it cannot be detected.
During a time when the resin may run out, the operator has to be clear of the potting resin application device, which is a problem in improving labor saving.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and the present invention is directed to a state in which a resin-applied material conveyed by a carrier is pushed up from below by a push-up portion and its height is adjusted. An object of the present invention is to make it possible to detect a change in a resin application amount and an abnormality in a potting resin application device for applying a resin by dropping it from a dispenser nozzle.

[0011]

According to a first aspect of the present invention, there is provided a potting resin coating device, wherein a weight measuring device for measuring the weight of a resin-coated material at the time of pushing up is provided at the pushing up portion.

Therefore, according to the potting resin coating device of the first aspect, by measuring at least the weight of the resin-coated material after the resin coating by the weight measuring device, the measured value and the resin-coated material before the resin coating are measured. It is possible to detect the application amount of the resin from the difference from the weight of the resin, and it is possible to detect an abnormality in the application amount at an early stage immediately after the application.

Accordingly, it is possible to effectively prevent the occurrence of defects due to an excessive amount of coating and an insufficient amount of coating, and to reduce the amount of defects. In the case where the amount of coating is insufficient, it is also possible to improve the defect by immediately adding the insufficient amount.

In addition, it is possible to detect a shortage of the resin due to a shortage of the remaining amount of the resin in the syringe or the tank for supplying the resin, and it is necessary for the operator to clearly touch the potting resin application device for the detection of the shortage of the resin. There is no.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

FIGS. 1A and 1B are views for explaining a first embodiment of a potting resin coating apparatus according to the present invention. In the drawings, reference numeral 1 denotes a line whose front surface is sealed with a transparent resin. The sensor 2 is a package in which a solid-state imaging device not shown in the drawing is housed at the bottom. 3, 3, ...
Is a lead, and 4 is a step on the inner surface of the package 2.

5 is a carrier for carrying the line sensor 1,
Reference numeral 6 denotes a dispenser nozzle for dropping resin from a resin tank and a syringe (not shown). Reference numeral 7 denotes a push-up portion which pushes up the line sensor 1 from below at the time of applying the resin, and sets the height of the line sensor 1 to a height set as appropriate for resin sealing. The push-up portion 7 has a weight measuring device 9 and can measure the weight when the line sensor 1 is pushed up. As described above, it is a feature of the present potting resin application device that the push-up portion 7 has the gravity measuring device 9.

The coating sections shown in FIG. 1 are arranged in a plurality of rows, for example, 5 rows, to form one potting resin coating apparatus. Each coating section operates simultaneously so that the coating at five locations is performed in parallel. Has been.

Normally, as shown in FIG. 1A, the push-up portion 7 is located below the carrier 5, and the dispenser nozzle 6 is in a state where the transparent resin (8) is not dropped. Then, when the transparent resin uncoated line sensor 1 is carried by the carrier 5 below the dispenser nozzle 6 at the coating position, the push-up portion 7 is raised to move the line sensor 1 to the transparent resin, as shown in FIG. Push up to a position set in advance as a height suitable for the application of (8).

When the push-up portion 7 pushes up the line sensor 1, a gravity measuring device 9 provided in the push-up portion 7 is provided.
Thus, the weight of the line sensor 1 can be measured. Then, the weight of the line sensor 1 is measured before the start of the dropping, and thereafter, the transparent resin 8 is dropped by the dispenser nozzle 6. After the dropping, the weight of the licensor 1 is measured again, and the measured value before the start of the dropping is subtracted from the measured value, and the subtracted value, that is, whether the weight of the dripping resin 8 falls within a predetermined allowable range. If not, the operation of the potting resin application device is stopped and a warning is issued to inform the operator when the value is not within the allowable range (excessive when the value is larger than the allowable range and insufficient when the value is smaller than the allowable range). It has become.

However, the weight of the line sensor 1 before the resin application by the dispenser nozzle 6 is set to a predetermined value that has been measured in advance, and the measurement is stopped one by one. Only the weight measurement after the resin application is performed as the weight measurement for each resin application. The weight of the applied transparent resin 8 may be determined based on the difference between the weight value and the predetermined value, and whether or not the weight is within an allowable range may be detected.

The measurement of the coating amount of the transparent resin 8 is as follows.
A plurality (for example, five) of the dispenser nozzles 6 are independently performed. That is, the gravity measuring device 9 is provided for each push-up unit 7. Then, any one of the gravity measuring devices 9
When an abnormality is found by the weight measurement by the method, the operation of the potting resin application device is stopped, and a warning is issued.

When there is no abnormality, when the dropping by the dispenser nozzle 6 is completed, the push-up portion 7 descends to its original position, and the line sensor, whose resin sealing has been completed by the carrier 5, is sent from the potting resin coating device. It is discharged and subjected to a curing process. According to such a potting resin coating device, it is possible to detect an abnormality in the coating amount at an early stage immediately after the coating. Can be effectively prevented from occurring, and the amount of defective occurrence can be reduced. When the amount of resin applied is insufficient, it is possible to immediately replenish the shortage by supplying the insufficient amount. The reason is that if the refilling is performed immediately, the viscosity does not change with time during the refilling, so that the refilling does not cause any problem.

In addition, since it is possible to detect a shortage of the resin due to a shortage of the remaining amount of the resin in the syringe or the tank for supplying the resin, it is not necessary for the operator to be completely attached to the potting resin coating apparatus for detecting the shortage of the resin. .

[0025]

According to the potting resin coating device of the present invention, at least the weight of the resin-coated material after the resin coating is measured by the weight measuring device, and the measured value and the resin-coated material before the resin coating are measured. It is possible to detect the application amount of the resin from the difference from the weight of the resin, and it is possible to detect an abnormality in the application amount at an early stage immediately after the application.

Accordingly, it is possible to effectively prevent the occurrence of defects due to an excessive amount of coating and an insufficient amount of coating, and to reduce the amount of defects. When the amount of application is insufficient, it is possible to add the insufficient amount.

In addition, it is possible to detect a shortage of the resin due to a shortage of the remaining amount of the resin in the syringe or the tank for supplying the resin, and it is necessary for the operator to make a clear contact with the potting resin application device in order to detect the shortage of the resin. There is no.

[Brief description of the drawings]

1A and 1B are explanatory views of a first embodiment of a potting resin coating apparatus of the present invention, wherein FIG. 1A shows a state before coating, and FIG. 1B shows a state at the time of coating. Show.

FIGS. 2A and 2B are explanatory views of a conventional example of a potting resin coating apparatus, wherein FIG. 2A shows a state before coating, and FIG.
Indicates a state at the time of application.

[Description of Signs] 1 ... Resin-coated object (line sensor), 5 ... Carrier, 6 ... Dispenser nozzle, 7 ... Push-up portion, 8 ... Resin (transparent resin), 9 ... ..Weight measuring device.

Claims (1)

[Claims] 1. A potting resin coating apparatus for applying resin by dropping it from a dispenser nozzle in a state in which the object to be resin-conveyed by a carrier is pushed up from below by a push-up section and its height is adjusted, A weight measuring device for measuring the weight of the resin-coated material at the time of pushing up, the potting resin applying device being provided.