JPH05299472A - Leader tape for tab - Google Patents

Abstract

PURPOSE:To provide a leader tape with good heat resistance, by making a main ingredient of the leader tape by using polymer with a given chemical formula. CONSTITUTION:A leader tape has each sprocket hole on both side edges for connecting front and end parts of a TAB tape. The main component of the leader tape is made of polymer indicated in a given formula. In this case, a tape with a thickness ranging from 50 to 500mum, especially 100 to 300mum, has preferably good film strength and bending elasticity. When an anti-static additive is added to the melted material during an extruding step, or the both faces of the extruded film are coated with additive-added resin, the tape is more preferable in dust-proof characteristics. A material, e.g. General Electric Co. ULTEM-D 5001, is melted and extruded to form a film with a thickness of 150mum, and then the film is slit into pieces of 35mm in width. In a punching step, given sprocket holes are made to the both side edges of the film to form a TAB tape leader.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a tape automated bonding (hereinafter referred to as TAB) having excellent heat resistance.
For leader tapes.

[0002]

2. Description of the Related Art Leader tapes for TAB are used by joining them before and after TAB in a semiconductor manufacturing process using TAB. In each process, TAB is unwound from a reel and wound after processing. At this time, leader tape is used to eliminate loss at the start and end parts.

Conventionally, a biaxially stretched polyethylene terephthalate film (hereinafter referred to as PET film) has been used for the leader tape, but in order to heat the semiconductor encapsulant at 150 to 170 ° C. for about 1 hour, P is used.
There were problems that the ET film was deformed and could not be wound on the reel.

[0004]

An object of the present invention is to provide a TAB leader tape having excellent heat resistance.

[0005]

DISCLOSURE OF THE INVENTION The present invention is a leader tape having sprocket holes provided on both side edges of the TAB tape, which are used by being spliced together before and after, and the main component of the leader tape is represented by the following formula. It is a leader tape for TAB, which is a polymer.

The tape of the composition used in the present invention is obtained by forming a film by a melt extrusion method, slitting it into a tape shape according to the width of the TAB tape, and punching out sprocket holes with a constant pitch on both side edges. Tape thickness is 50-150μm, and further 100-300μ
It is preferable that it is m in terms of the strength and bending elasticity of the film.

In addition, during melt extrusion, an antistatic agent added, or a film after melt extrusion coated with a resin containing an antistatic agent on both sides is preferable from the viewpoint of dust prevention.

Regarding the dimensional accuracy of the sprocket holes, when viewed at the cumulative pitch of 100 sprocket holes, the range is preferably within ± 0.1%, and more preferably within ± 0.05, with respect to the size. Preferably.

[0009]

[Embodiment] << Embodiment 1 >> UL, General Electric Company
TEM-D5001 was melt extruded to form a film having a thickness of 015 μm, slitted to a width of 35 mm, and sprocket holes as shown in FIG. 1 were punched on both side edges thereof to obtain a TAB leader tape. ..

Comparative Example 1 A PET film having a thickness of 150 μm was processed into the same shape as in Example 1 to obtain a TAB leader tape.

Table 1 shows the results of measuring the dimensional changes of 100 pitches of the sprocket holes before and after leaving the two types of samples in an oven whose temperature was adjusted to 170 ° C. for 1 hour.

[0012]

[0013]

The TAB leader tape of the present invention is 17
Excellent dimensional stability even at high temperatures of 0 ° C.

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[Procedure amendment]

[Submission date] September 20, 1991

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction content]

The tape of the composition used in the present invention is obtained by forming a film by a melt extrusion method, slitting it into a tape shape according to the width of the TAB tape, and punching out sprocket holes with a constant pitch on both side edges. The thickness of the tape is preferably 50 to 500 μm, more preferably 100 to 300 μm from the viewpoint of film strength and bending elasticity.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction content]

[0009]

[Embodiment] << Embodiment 1 >> UL, General Electric Company
TEM-D5001 was melt-extruded and formed into a film with a thickness of 150 μm, then slit into a width of 35 mm, and sprocket holes as shown in FIG. 1 were punched on both side edges to obtain a TAB leader tape. ..

Claims (1)

[Claims] 1. A leader tape having sprocket holes on both side edges, which are used by being spliced together before and after the tape for automated tape bonding, and the main component of the leader tape is a polymer represented by the following formula. Characteristic tape Leader tape for automated bonding.