JPH02219775A - Moisture proof packaging bag - Google Patents

Abstract

PURPOSE:To make moisture absorption control easy by providing an inner case packaging part and a sample packaging part separately sealed by shielding therebetween. CONSTITUTION:An inner case packaging part 32 having an inner case 2 containing an electronic part received therein and a sample packaging part 33 having a sample 21 received therein are placed into a moisture proof bag 3 and sealed separately by sealing parts 31. When moisture absorption rate is measured, therefore, there is not need for unpacking the inner case packaging part 32 and the sample packaging part 33 is only unpacked to take out the samples 21. With respect to the samples 21 which have experienced the storage and transportation under the same conditions as QFP(quarter flat package), testing is performed and, based on the test results, the moisture absorption rate of the inner case 2 can be evaluated and the number of the moisture control operations can be reduced. If, for example, the lumber high in moisture absorption rate and similar to the QFP in absorption characteristics is used as the sample 2, the moisture absorption rate can be measured satisfactorily even by an ordinary weighing instrument.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to moisture-proof packaging for moisture-proof packaging electronic components such as surface-mounted packages.

[Prior Art] Surface-mounted packages, such as QFP (four-way flat package), and other electronic components (hereinafter, QFP will be used as a representative example of these electronic components) are extremely sensitive to moisture. Moisture-proof packaging is used during storage and transportation.

Figure 3 shows a conventional moisture-proof packaging of this type.

There was something explained in Figure 4. Figure 3 is a perspective view for explaining QFP packaging using conventional moisture-proof packaging.
In the figure, (1) is the tray that stores the QFP, (2) is the inner box that stores the tray (1), and (3> is the moisture-proof packaging, for example, aluminum laminate is used. (21)
is a label affixed to the inner box (2), and (31) is a seal portion indicating the sealed location on the moisture-proof packaging (3).

Next, the packaging of the QFP will be explained. A QFP (not shown) is placed in each storage hole of the tray (1), and the trays (1) containing the QFP are stacked in a specified number of stages. Further, empty trays (1) may be stacked on the topmost stage.

Next, after aligning the four corners of the stacked trays (1), they are placed in an inner box (2), and a label indicating the type of QFP is attached to the outside of this inner box (2). And inner box (2)
Close the lid, secure it with packing tape, etc., then seal it in the moisture-proof packaging (3), which is an aluminum laminate bag, evacuate the inside of the moisture-proof packaging (3), and shield the opening from heat. to form a seal part (31), and the packaging process is completed.

The reason why QFP extremely dislikes moisture is that if it absorbs moisture, there is a risk of cracking during soldering. That is, absorbed moisture accumulates inside the package (at the interface between the die pad on which the chip is mounted and the molding resin), and the accumulated moisture during soldering evaporates and rapidly expands. As a result, the molding resin peels off from the gooey bat, reducing its adhesion to the chip. As a result, the moisture resistance performance decreases, and in extreme cases, the package may swell and eventually break.

Figure 4 shows the moisture absorption characteristics of QFP, showing the moisture absorption rate (
(weight mill). As shown in FIG. 4, even if the QFP is packaged in moisture-proof packaging (3) after undergoing the above-mentioned strict treatment process, the QFP absorbs moisture and becomes damp as time passes. Therefore, it is important to manage moisture absorption, and tests such as measuring the moisture absorption rate are performed during storage and before mounting.

[Problems to be Solved by the Invention] Since the conventional moisture-proof packaging described above is configured as described above, when conducting tests such as measuring the moisture absorption rate in moisture absorption management, it is necessary to unpack and remove the QFP. It must be extracted and then repackaged after testing. Also, the test is Q
Although the actual FP was used, there was a problem in that a high-precision measuring instrument had to be used in order to accurately measure the low moisture absorption rate of the QFP.

This invention was made in order to solve this problem, and it is an object of the present invention to obtain a moisture-proof packaging that does not require repackaging when conducting tests such as measuring moisture absorption rate, and can be sufficiently measured with a general measuring instrument. It is an object.

[Means for Solving the Problems] The moisture-proof packaging according to the present invention includes a sample packing section for packing samples, separate from an inner box packing section for packing inner boxes, and a sample packing section and an inner box packing section for packing samples. We decided to create a sealed structure with a shield between the two.

[Function] In this invention, a sample packing section for packing samples is provided separately from an inner box packing section for packing inner boxes, and the space between this sample packing section and the inner box packing section is shielded and sealed. This makes it possible to perform tests such as measuring the moisture absorption rate without having to unpack the inner box packaging.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings. 1st
The figure is a perspective view showing the structure of a moisture-proof packaging, which is an embodiment of the present invention. It will be done. (21) is the sample, 31) is the seal part showing the sealed part on the moisture-proof packaging (3), (32)
(33) is the inner box packaging part of the moisture-proof packaging (3), and the sample packaging part of the moisture-proof packaging (3).

As shown in FIG. 1, the moisture-proof packaging according to the present invention includes, in addition to the inner box packing section (32) that packs the inner box (2),
A sample packing section (33) for packing the sample (21) is provided, and a seal section (31) seals between the two.

Therefore, when performing a test such as measuring moisture absorption rate, there is no need to unpack the inner box packing section (32), and the sample packing section (32)
3), take out the sample (21), and QF
Samples stored and transported under the same conditions as P (21)
Since it is possible to perform a test using the sample (21) and judge whether the moisture absorption rate is good or bad using the sample (21), the number of steps for moisture absorption management can be reduced.

In addition, as shown in Figure 2, sample materials such as wood, which have a high moisture absorption rate and similar moisture absorption characteristics to QFP, are used as samples.
), moisture absorption rate can be measured satisfactorily with a general measuring instrument.

In the above embodiment, a case is shown in which one sample packing section is provided, but a plurality of sample packing sections may be provided so that a plurality of tests can be performed.

[Effects of the Invention] As explained above, this invention has a structure in which a sample packing section is provided separately from the inner box packing section, and the space between the two is sealed by a sealing section, making it easy to manage moisture absorption. It has the effect of being able to.

[Brief explanation of the drawing]

FIGS. 1 and 2 are diagrams for explaining an embodiment of the present invention, and FIGS. 3 and 4 are diagrams for explaining a conventional moisture-proof packaging. (2) is the inner box, (3) is the moisture-proof packaging, (21) is the sample, (31) is the sealing part, 32) is the inner box packaging part,
(33) is the sample packaging department. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Scope of Claims] The invention has an inner box packing section made of a moisture-proof material and serves as a part for packing an inner box containing electronic components, and the inner box containing the electronic components is enclosed in the inner box packing section. In moisture-proof packaging that shields and seals the opening, a sample packaging section for packaging samples is provided separately from the inner box packaging section, and the space between this sample packaging section and the inner box packaging section is shielded and sealed. Moisture-proof packaging characterized by having a structure that allows