JPH04294774A - Qfp housing tray - Google Patents

Abstract

PURPOSE:To prevent damage by static charge generated by frictions and to shorten the indentifying time in an automatic inspection of marks on a surface by a method wherein QFP housing recessed parts of a tray is formed of recessed parts having inclined surfaces and bottom surfaces which lead to the inclined surfaces along the outer brim of a QFP lead pin. CONSTITUTION:A QFP housing tray 4 is a tray in which a number of QFP type IC packages 3 are housed and which can be stacked in many stages. Each housing recessed part of the tray 4 is provided with a recessed part 2 having four inclined surfaces 1 on which a QFP 3 can slide and a bottom surface which leads to the inclined surfaces 1 along the QFP lead pins. By this, a number of QFPs 3 can be arranged and housed in the tray 4 and do not displace in the horizontal direction. Therefore, damage of the QFPs due to static charge generated by the friction between the tray and the QFPs can be prevented, and the identifying time can be shortened in an automatic inspection of marks on surfaces of the QFPs.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tray for storing QFP type IC packages (hereinafter referred to as QFP).

0002

2. Description of the Related Art Conventionally, QFP storage trays have the shape shown in FIG. 3 to facilitate storage. Further, as shown in FIG. 4, which is a cross section taken along line BB' in FIG. 3, it has a storage recess with a bottom surface that has more room than the outer shape of the QFP.

0003

[Problems to be Solved by the Invention] However, the above-mentioned prior art has the following drawbacks. (1) The QFP stored in the tray storage recess is easily misaligned in the horizontal direction, and therefore electrostatic damage to the QFP is likely to occur due to electrification caused by friction. (2) In automatic inspection of marks on the QFP surface using the conventional tray, recognition time is required due to the positional deviation.

0004

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides that the storage recess in the tray has a slope and a recess continuously below the slope and having a bottom surface along the outer edge of the QFP lead pin. .

[0005]

[Operation] When a QFP is stored by the handler in the tray configured as described above, if the handler's chuck is directly above the storage recess, the QFP separated from the chuck is stored directly into the lower recess. . Furthermore, if the chuck is slightly displaced from directly above the storage recess, it will be stored in the lower recess while sliding on the slope. The lower recess is QF
Since the recess has a bottom surface along the P lead pin, the QFP housed in the lower recess cannot be displaced in the horizontal direction.

[0006]

[Embodiments] Hereinafter, embodiments of the present invention will be explained based on the drawings. FIG. 1 is a perspective view of a storage recess of a QFP storage tray according to the present invention. FIG. 2 is a cross-sectional view taken along line AA' in FIG. 1, and shows four slopes 1 on which the QFP can slide,
Continuing therefrom, a recess 2 having a rectangular bottom surface along the QFP lead pin is provided below.

[0007]

Effects of the Invention The present invention has the following advantages. (1) It is possible to store a large number of QFPs in a tray in alignment without horizontal positional displacement. (2) Due to the effect of (1) above, it is possible to prevent electrostatic damage to the QFP due to charging caused by friction between the tray and the QFP. (3) Similarly, due to the effect of (1) above, it is possible to shorten the recognition time in automatic inspection of marks on the QFP surface.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a storage recess of a storage tray according to the present invention.

FIG. 2 is a sectional view taken along line A-A' in FIG. 1;

FIG. 3 is a perspective view of a conventional tray.

FIG. 4 is a sectional view taken along line B-B' in FIG. 3;

[Explanation of symbols]

1 Slope 2 Lower recess 3 QFP 4 Tray

Claims (1)

[Claims] 1. A tray that can store a large number of QFP type IC packages and stack them in multiple stages, wherein the QFP storage recess of the tray has a slope and a bottom surface continuously below the slope along the outer edge of the QFP lead pin. A QFP storage tray made up of concave parts.