JPH06104317A - Tab tape and its manufacture - Google Patents

Abstract

PURPOSE:To make an insulating tape with a bonding agent applied to the entire surface of its upper surface usable by sticking metallic foil to the central part of the insulating tape with the bonding agent by thermocompression bonding by using a pressing roll coated with a Teflon film. CONSTITUTION:A bonding agent is applied to the entire area of the upper surface of an insulating tape 1. Metallic foil 2 is stuck to the central part of the tape 1 by means of a heated pressing roll 3 except both side sections. Since the surface of the stainless steel roll 3 is coated with a Teflon film, adhesion of the bonding agent can be prevented by the Teflon film. The film coating the surface of the roll 3 can be formed of silicone (silicon resin), etc. Therefore, adhesion of the bonding agent to the surface of the surface of the roll 3 and further to the surface of a product can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a TAB tape using an insulating tape having an adhesive applied to the entire upper surface as a material and a method for manufacturing the TAB tape.

[0002]

2. Description of the Related Art A film carrier method (TAB) is known as a mounting technology for semiconductor devices.
The TAB tape used for this is formed by pressure-bonding a metal foil with an adhesive while leaving both sides at the center of a flexible insulating tape made of polyester resin or the like. Forming a conductor pattern,
Then, tin plating is applied to bond the Au bumps.

At present, in the insulating tape used for such TAB tape, an adhesive is applied in the width of the metal foil to the central portion where the metal foil is adhered, and the adhesive is applied to both sides. There wasn't. Therefore, when applying the adhesive to the insulating tape, it is necessary to accurately determine the application position of the adhesive in accordance with the position of the metal foil to be adhered.

Since it is extremely difficult to apply the adhesive in accordance with the position of the metal foil to be adhered, it is necessary to apply the adhesive to the protective film in advance, cut the required metal width, and then press-bond it to the insulating tape. However, the manufacturing process is complicated, and as a result, the manufacturing cost is increased.

Therefore, when the metal foil and the insulating tape are thermocompression-bonded, if an insulating tape having an adhesive applied to the entire upper surface is used, the adhesive is applied to the central portion, which has been conventionally used. Compared with the case where the insulating tape is used, the manufacturing cost can be reduced because the insulating tape having the adhesive applied to the entire upper surface can be obtained in a simplified manufacturing process. However, in this case, if an insulating tape coated with an adhesive on the entire upper surface is used, the adhesive coated on both sides of the insulating tape may adhere to the pressure roll, which is usually made of stainless steel. The adhesive adhered to the pressure bonding roll adheres to the surface of the metal foil, resulting in a product that cannot be used, resulting in a large amount of defective products.

[0006] The present invention provides a TAB tape and a method for producing the same, which makes it possible to use an inexpensive insulating tape having an adhesive applied to the entire upper surface thereof without adhering the adhesive to a pressure roll. With the goal.

[0007]

According to the method of the present invention, a metal foil is applied to the central portion of an insulating tape having an adhesive applied to the entire upper surface thereof, and a Teflon (trade name) film or silicone (silicon resin) is applied to the surface thereof. ) Is thermocompression-bonded by using a pressure-bonding roll coated with a film, and the TAB tape obtained by the method of the present invention has a central portion of an insulating tape having an adhesive applied to the entire upper surface. The metal foil is formed by thermocompression bonding, and these solve the above problems.

FIG. 1 is a process explanatory diagram for carrying out the method of the present invention. An adhesive is applied to the entire upper surface of the insulating tape 1, and the central portion of the entire adhesive-applied insulating tape 1 is coated. Crimping roll 3 with metal foil 2 heated, leaving both sides
Shows the state of being thermocompression bonded. Usually, when the adhesive is applied to the entire upper surface of the insulating tape, the adhesive on both sides protruding from the metal foil 2 is exposed and adheres to the pressure bonding roll, causing a problem as described above. The pressure-bonding roll 3 used in the present invention has a film 5 of Teflon (trade name) formed on the surface of the stainless-made pressure-bonding roll 4, as shown in FIG. The film 5 formed on the surface of the stainless pressure roll 4 is not limited to Teflon (trade name), but may be formed of silicone (silicon resin) or the like.

TA obtained by the method of the present invention
The B tape is formed by thermocompression bonding a metal foil to the central portion of the insulating tape whose entire upper surface is coated with an adhesive.
The dried adhesive remains as it is on both sides except where the metal foil is pressure-bonded.

[0010]

Example 1 Adhesive is applied to the entire upper surface, width 35 mm
Insulating tape made of polyimide of 155 ℃, 165 ℃, 1
Each was heated to 75 ° C. When a copper foil having a width of 26.5 mm was thermocompression-bonded thereto using a pressure roll having a Teflon (trade name) film formed on the surface heated to 130 ° C. and 140 ° C. Adhesive adhesion did not occur at all, and a similar product to the conventional one could be manufactured at low cost.

[0011]

Example 2 A TAB tape was produced in the same manner as in Example 1 except that the pressure-bonding roll of Example 1 having a silicone (silicon resin) film formed on its surface was used. Adhesive adhesion hardly occurred and a good TAB tape was obtained.

[0012]

As described above, according to the present invention, when the insulating tape having the adhesive applied to the entire upper surface and the metal foil are thermocompression bonded, the adhesive adhered to the pressure-bonding roll as in the prior art is a product. It is possible to use the insulating tape, which is inexpensive and whose adhesive is applied to the entire upper surface, as a raw material of the TAB tape. Furthermore, it is possible to eliminate the generation of defective products to which the adhesive is attached, and as a result, it is possible to reduce the manufacturing cost.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an example of steps when carrying out the method of the present invention.

FIG. 2 is a perspective explanatory view of a pressure bonding roll used in the present invention.

[Explanation of symbols]

 1 Insulating tape 2 Metal foil 3 Crimping roll 4 Stainless steel pressure roll 5 Teflon (trade name) film

Claims (3)

[Claims] 1. A TAB tape in which a metal foil is thermocompression bonded to a central portion of an insulating tape having an adhesive applied to the entire upper surface. 2. A TAB characterized by thermocompression bonding a metal foil in the central portion of an insulating tape having an adhesive applied to the entire upper surface thereof, using a pressure bonding roll having a Teflon (trade name) film coated on the surface thereof. Tape manufacturing method. 3. A TAB characterized in that a metal foil is thermocompression-bonded to a central portion of an insulating tape having an adhesive applied to the entire upper surface using a pressure-bonding roll having a silicone (silicon resin) coating on the surface thereof. Tape manufacturing method.