JPH0551764U - Embossed carrier tape - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To eliminate damage to electronic components stored in the carrier tape. [Structure] An embossed carrier tape in which a flange portion 5 between each embossed concave portion 2 is provided with a ridge 10 in the width direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an embossed carrier tape (hereinafter referred to as a carrier tape) for housing an electronic component having a lead frame (hereinafter referred to as an electronic component).

[0002]

[Prior Art]

 Conventionally, as a packaging form for storing electronic parts, a container-shaped tray or carrier tape having an embossed concave part (hereinafter referred to as a concave part) matching the shape and size thereof, or a tubular shape having a cross-sectional shape of the electronic part There is a magazine.

However, in addition to the carrier tape, since the number of pieces to be stored in one container is small, it takes a lot of time to mount electronic parts. Therefore, the carrier tape has been widely used in recent years. In this case, as shown in FIGS. 2 (a), 2 (b), 2 (c) and 2 (d), the electronic tape 3 is stored in the concave portion 2 of the carrier tape 1 so that the electronic component 3 does not pop out. The upper surface of 2 was covered with the top cover tape 4, adhered to the flange portion 5, and wound on the reel 6 for storage.

When the electronic component 3 is automatically mounted on a substrate or the like, deformation of the lead frame 7 may cause an accident. It is a serious problem for those skilled in the art to prevent the lead frame 7 from moving and coming into contact with the wall surface of the recess 2 to be deformed. For this reason, various shapes of the recess 2 have been conventionally studied, but the present situation is that nothing satisfactory can be found.

[0005]

[Problems to be solved by the device]

 In the conventional carrier tape 1, the shape of the concave portion 2 has been devised in various ways to prevent the lead frame from being deformed. However, after the electronic components 3 are stored, all of them are wound on the reel 6, so depending on the shape of the reel. The problem occurs. The carrier tapes are stipulated in JIS according to the type, and all are wound along the reel winding core, and the recessed portion of the carrier tape at the beginning of winding is wound in a state of being subjected to internal stress.

According to the JIS standard, electronic components must not be damaged or abnormal within the minimum bending radius of the carrier tape, but depending on handling during transportation, the electronic components may come into contact with the bottom surface or side surface of the recess and lead. The frame was sometimes deformed. That is, as shown in FIG. 2D, the concave portion 2 of the carrier tape 1 has rigidity so as to sufficiently protect the stored electronic components 3, but the winding start portion wound on the reel 6 has an inner diameter. Is small, stress is applied to the inside, and the flange portion 5 is pulled left and right around the recess 2 as a fulcrum. As a result, the upper portion of the recess 2 is also pulled, and the upper portion has a widened shape. The frame 7 may come into contact with the bottom surface or the side surface of the recess 2 to be deformed.

[0007]

[Means for Solving the Problems]

 The present invention solves the aforementioned problems by preventing the conventional carrier tape from bending due to the flexure of the recess that occurs when it is wound on a reel. The gist of the present invention is to emboss the recess, the flange and the The embossed carrier tape is characterized in that the feed holes are continuous in the lengthwise direction, and the flange portion between the respective embossed recesses is provided with lines in the width direction.

The present invention will be described below with reference to the drawings. Generally, the carrier tape is defined by JIS, and as shown in FIGS. 1 (a), 1 (b), 1 (c), and 1 (d), the recess 2 for accommodating the electronic component 3, the flange 5, and the feed hole 8 are long. The structure is continuous in the vertical direction.

The carrier tape 9 of the present invention is basically the same as the conventional one, except that the flange portion 5 between the adjacent concave portions 2 is provided with the creases 10 in the width direction. Has special characteristics. The number of the streaks 10 may be plural in each of the flanges 5 between the adjacent recesses, and the appropriate depth is 1/4 to 1/3 of the thickness of the carrier tape. When the thickness is 1/3 or more, the strength of the portion is lowered, and there is a risk of fracture when stress is applied, and when it is 1/4 or less, a sufficient effect cannot be obtained. It may also be provided intermittently such as perforations. There are no particular limitations on the cross-sectional shape of the creases 10, and various ideas are conceivable. For example, the cross-sectional shape is V-shaped as shown in FIG. Desirably, or a slit having a length of 1/3 to 4/5 of the width of the carrier tape may be provided preferably in the center except both edges of the carrier tape.

[0010]

【Example】

Made of polystyrene, thickness 0.3 mm, width 32 mm, concave dimension 12.3 × 21. Using a TSOP (II) 32P carrier tape having a depth of 4 mm and a depth of 1.6 mm, a semi-circular line having a width of 0.5 mm and a depth of 0.1 mm was formed in the center of the flange between the recesses. . The forming method was performed by a conventionally known method, and a hot plate having the same shape as the semicircle of the lines heated to 150 ° C. was used and pressed at a pressure of 5 kg / cm ^{2 for} 0.3 seconds.

Using the polystyrene carrier tape of the present invention in which the lines are formed in this manner, TSOP (II) 32P is housed in each recess, and a hub having an outer diameter of 100 mm has a diameter of 16 m. When the lead frame was inspected for damage after winding and transporting, a slight deformation of 0.2% was found in about 500,000 TSOP (II) 32Ps without streaking. It was 0% by the invention.

[0012]

[Effect of the device]

 As shown in FIG. 1 (d), the stress is concentrated on the streak by forming the creases in the carrier tape, and the carrier tape is wound into a rectangular shape with the vertex as the apex. The spread is eliminated, and as a result, the lead frame of the electronic component can be prevented from being deformed without contacting the bottom and side surfaces of the recess, and the desired purpose can be achieved. It can be applied to all conventional carrier tape manufacturing equipment, and stable production can be obtained without mounting errors.

[Brief description of drawings]

1A is a partial plan view of a carrier tape of the present invention, FIG. 1B is a partial cross-sectional view of an electronic component stored therein,
(C) is explanatory drawing which shows the aspect of a streak part, (d) is sectional drawing of the part wound by the reel and bent.

FIG. 2A is a perspective view showing a state where a conventional carrier tape is wound on a reel, FIG. 2B is a partial plan view, and FIG.
FIG. 4D is a partial cross-sectional view of the electronic component when it is stored, and FIG.

[Explanation of symbols]

 1 carrier tape, 2 concave parts, 3 electronic parts, 4 top cover tape, 5 flange part, 6 reel, 7 lead frame, 8 feed hole, 9 carrier tape, 10th line.

Claims (1)

[Scope of utility model registration request] 1. An embossed carrier tape, wherein the embossed recesses, the flanges and the feed holes are continuous in the lengthwise direction, and the flanges between the embossed recesses are provided with stripes in the width direction.