KR20190008150A - Magnetic tape for semiconductor fixing - Google Patents

Abstract

The present invention relates to a semiconductor fixing tape and a manufacturing method thereof and, more specifically, a semiconductor fixing tape and a manufacturing method thereof which prevents a back spill phenomenon in which a metal for shielding electromagnetic waves penetrates into a lower surface of a semiconductor chip in a semiconductor shielding process of a spray or sputtering type as well as is excellent in an adhesion to a cooling plate and a thermal conductivity, thereby preventing or minimizing damage of the semiconductor ship by heat generated in the sputtering and spraying processes.

Description

MAGNETIC TAPE FOR SEMICONDUCTOR FIXING [0002]

More particularly, the present invention relates to a magnetic tape for fixing semiconductor devices, and more particularly, to a magnetic tape for fixing semiconductor devices, which is excellent in adhesion with a solder ball fused to a lower surface of a semiconductor chip and a lower surface of the semiconductor chip, A magnetic tape for semiconductor fixing which can prevent a back spill phenomenon in which a metal for shielding electromagnetic waves is penetrated and has an excellent adhesion with a cooling plate and a thermal conductivity to prevent or minimize damage of the semiconductor chip due to heat generated in the electromagnetic wave shielding step .

Generally, the semiconductor manufacturing process is divided into a pre-process and a post-process. After the patterning process of inserting a circuit on the wafer in the whole semiconductor process, the wafer is divided into small chip units in the subsequent process, So that the packaging can be safely protected.

In the packaging process, the semiconductor chip is protected from external stimuli such as chemical reaction and temperature change, and the noise caused by the interference with the adjacent chips, as well as the conductor connection process for allowing the chips cut to a small size to transmit and receive electrical signals. Such as an electromagnetic wave shielding process.

Meanwhile, when a BGA semiconductor package having a plurality of solder balls formed on the lower surface of the semiconductor package is subjected to an electromagnetic wave shielding process by sputtering or spraying, a solder ball is formed on the lower surface of the semiconductor package, There is a problem that a space for penetration occurs and a back spill phenomenon which causes defects of semiconductor devices occurs due to the penetration of the electromagnetic shielding metal into the space during the electromagnetic wave shielding process.

1A, a process of loading a semiconductor package using a conventional laser cutting process will be described. Referring to FIG. 1A, a semiconductor chip body 121 is mounted on a semiconductor fixing tape 110 on which a protective layer 111 and a chip fixing layer 112 are stacked. The semiconductor chip 120 is loaded with the solder ball 122 on the surface of the semiconductor chip 120. At this time, in order to prevent the back-spill phenomenon in which the metal for shielding electromagnetic waves penetrates the lower surface of the semiconductor chip 120, 110) is cut with a laser to form a pocket into which the semiconductor chip can be loaded.

The electromagnetic wave shielding layer 130 is formed using the spray or sputtering method after the semiconductor chip 120 is loaded on the semiconductor fixing tape 110 having the pockets formed therein. However, as shown in FIGS. 1B and 1C, When the semiconductor chips are loaded, the back spill area A may be generated when the pockets are not accurately loaded at the positions where the pockets are formed. This may cause defective products. In order to form pockets on the upper surface of the chip fixing layer 112, There is a problem that the complexity of the process increases because a separate process such as a process must be performed.

On the other hand, conventional adhesive tapes used for semiconductor devices include an adhesive tape for fixing a lead frame, a tape for bonding a heat sink, a TAB (Tape Automated Bonding) tape, an LOC (Lead On Chip) tape, Is used for the purpose of improving the productivity and yield of the lead frame itself and the entire semiconductor assembly process by fixing the lead of the lead frame. In general, the chip is fixed on the lead frame by the lead frame maker, , Wire bonding, etc., and then sealed with an epoxy molding compound, so that the adhesive tape is contained in the semiconductor device package. Also, the above-mentioned tapes such as the adhesive tape for heat sink adhesion are included in the semiconductor package in the same manner as the lead frame fixing adhesive tape. Therefore, the adhesive tape for electronic parts has excellent adhesive strength as well as general reliability at the semiconductor level, workability at the time of taping, high temperature, humidity, voltage, etc. externally applied from assembly process of semiconductor device to finished product after assembly Of the material.

As the adhesive tape for electronic parts used for this purpose, a heat-resistant base film such as a polyimide film is coated with a synthetic rubber base such as a polyacrylonitrile resin, a polyacrylate resin, a resol phenol resin or an acrylonitrile-butadiene copolymer The resin is used alone, or a point adhesive made by changing or mixing with another resin is applied, followed by a coating and drying step, and in the step B (the curing intermediate state of the thermosetting resin, the resin is softened by heating, A step of swelling when it comes into contact with but not completely melting or dissolving) is mainly used.

However, such a pressure-sensitive adhesive tape has a low adhesive force at a high temperature, causing an excessive bleeding of the pressure-sensitive adhesive during taping, causing the pressure-sensitive adhesive to adhere to the taping device or scattered in unnecessary portions, resulting in defective semiconductor devices, The semiconductor may be damaged by heat generated in the shielding process.

Korean Patent No. 10-1208082

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a semiconductor device, which has excellent adhesion with a solder ball fused to a lower surface of a semiconductor chip and a lower surface of the semiconductor chip, It is possible to prevent the back spill phenomenon in which the metal for shielding electromagnetic waves penetrates the lower surface of the semiconductor chip and to improve the adhesion and the thermal conductivity with the cooling plate to prevent or minimize the damage of the semiconductor chip due to heat generated in the electromagnetic wave shielding process A magnetic tape for semiconductor fixing.

According to an aspect of the present invention, there is provided a semiconductor device comprising: a chip fixing layer for fixing the semiconductor chip in close contact with a bottom surface of a semiconductor chip having a stepped portion formed by a solder ball; And a magnetic thin film layer for preventing a back spill phenomenon in which a metal for shielding electromagnetic waves penetrates between a lower surface of the semiconductor chip and the chip fixing layer, a magnetic field dispersion layer comprising magnetic metal powder and a protective layer, to provide.

According to an embodiment of the present invention, the thickness of the chip fixing layer may be 5 to 1000 mu m.

According to an embodiment of the present invention, the metal thin film layer may be a metal foil made of a pure metal of Cu, Al, Sn or Fe, or an alloy containing any one of them, .

According to an embodiment of the present invention, the magnetic metal powder may be selected from the group consisting of pure iron, carbonyl iron, iron-silicon alloy, iron-silicon-chromium alloy, -Si-Al alloy, Mn-Zn ferrite, Permalloy, and Mo-permalloy.

According to an embodiment of the present invention, the protective layer may be any one selected from the group consisting of a polyethylene terephthalate film (PET film), a polyimide film (PI film), and a polyethylene film (PE film).

According to an embodiment of the present invention, the magnetic field dispersion layer is interposed between the metal thin film layer and the protective layer, the thickness of the chip fixing layer is 5 占 퐉 or more and 90% or less of the height of the solder ball, The sum of the thicknesses of the chip fixing layer and the magnetic field dispersion layer is not less than 5 占 퐉 but not more than 90% of the height of the solder ball.

According to an embodiment of the present invention, the magnetic metal powder may be included in an amount of 1 to 90 parts by weight based on 100 parts by weight of the binder.

According to an embodiment of the present invention, the thickness of the magnetic field dispersion layer may be 10 to 200 탆.

According to an embodiment of the present invention, the chip fixing layer may include acrylic or silicone adhesive.

The present invention also relates to a method of manufacturing a semiconductor device, which includes a magnetic metal powder and which is brought into close contact with a lower surface of a semiconductor chip having a stepped portion due to a solder ball to form a chip fixing layer for fixing the semiconductor chip, And a metal thin film layer and a protective layer for preventing a back spill phenomenon in which a metal for shielding electromagnetic waves penetrates between the lower surface of the semiconductor chip and the chip fixing layer.

The magnetic tape for fixing according to the present invention has excellent adhesion with the solder balls fused to the lower surface of the semiconductor chip and the lower surface of the semiconductor chip to prevent the semiconductor fixing magnetic tape from lifting from the semiconductor chip, The back spill phenomenon in which the metal for shielding electromagnetic waves penetrates the lower surface of the semiconductor chip is prevented and the thermal conductivity is excellent so that damage to the semiconductor chip due to heat generated in the electromagnetic wave shielding process can be prevented or minimized, It is possible to reduce the manufacturing cost and the defective rate of the product.

1A is a schematic cross-sectional view illustrating a structure in which a semiconductor chip is loaded on a semiconductor fixing tape having pockets formed by a conventional laser cutting process.
FIG. 1B is a schematic cross-sectional view illustrating a structure in which an electromagnetic wave shielding process is performed on a semiconductor chip loaded on a semiconductor fixing tape having pockets formed using a conventional laser cutting process.
1C is a schematic cross-sectional view illustrating a structure in which a semiconductor chip mounted on a semiconductor fixing tape having pockets formed therein is subjected to an electromagnetic wave shielding process using a conventional laser cutting process.
2A is a schematic diagram showing a semiconductor chip fixed on a magnetic tape for fixing semiconductor devices according to an embodiment of the present invention.
2B is a schematic cross-sectional view illustrating a semiconductor chip fixed on a magnetic tape for fixing semiconductor devices according to an embodiment of the present invention.
3 is a cross-sectional perspective view of a magnetic tape for fixing semiconductor devices according to an embodiment of the present invention.
4 is a cross-sectional perspective view of a magnetic tape for fixing semiconductor devices according to an embodiment of the present invention.
5A is a photograph of a lower surface of a semiconductor chip in which an electromagnetic wave shielding step is performed using the semiconductor fixing tape of Comparative Example 1. Fig.
5B is a photograph of a lower surface of a semiconductor chip in which an electromagnetic wave shielding process is performed using a magnetic tape for fixing semiconductor devices according to an embodiment of the present invention.
FIG. 6 is a photograph of the semiconductor chip after fixing the semiconductor chip fixed on the semiconductor fixing magnetic tape according to the embodiment of the present invention. FIG.

Hereinafter, the present invention will be described in more detail.

As described above, in the conventional semiconductor fixing tapes such as polyimide films, pockets have to be formed on the film using a laser cutting process in order to prevent the back spill in the electromagnetic shielding process. Back spill phenomenon may occur when unsatisfactory size and position conditions are not satisfied to prevent back spill phenomenon and additional process such as laser cutting process must be performed in the electromagnetic wave shielding process to increase the complexity of the process.

In addition, since the conventional semiconductor fixing tape has a low hardness, the adhesive tends to be excessively smeared during the taping operation, causing the adhesive to adhere to the taping device or scattered in unnecessary portions, resulting in defective semiconductor devices, There is a possibility that the semiconductor may be damaged by heat generated in the semiconductor device. In addition, the adhesiveness to the semiconductor fixing tape and the cooling plate is low, so that the heat transfer effect is reduced or the electromagnetic shielding metal is not uniformly coated.

SUMMARY OF THE INVENTION In order to solve the above-described problems, the present invention has been made to solve the above problems, and it is an object of the present invention to provide a semiconductor device, A magnetic tape for semiconductor fixing capable of preventing or minimizing damage of a semiconductor chip due to heat generated in the electromagnetic wave shielding step.

In particular, the magnetic tape for fixing according to the present invention includes a chip fixing layer for fixing the semiconductor chip in close contact with a lower surface of a semiconductor chip having a stepped portion due to a solder ball, The deformed shape is retained to prevent damage of the chip from heat generated in the semiconductor shielding process of the sputtering or spraying method and to prevent the back spill phenomenon in which the metal for shielding electromagnetic waves penetrates between the lower surface of the semiconductor chip and the chip- A magnetic thin-film layer for preventing magnetism, a magnetic-field-dispersing layer containing a magnetic metal powder, and a protective layer.

First, the protective layer included in the magnetic tape for semiconductor fixing of the present invention will be described.

The protective layer 211 can prevent the metal thin film layer 213 from being sheared. As the protective layer, any one selected from a polyethylene terephthalate film (PET film), a polyimide film (PI film) and a polyethylene film (PE film) may be used. The thickness of the protective layer is not limited as long as it is flexible enough to serve as a tape. However, in order to prevent the lower surface of the semiconductor chip from being lifted by the elasticity of the protective layer, Preferably 5 to 100 mu m.

Next, the metal thin film layer included in the magnetic tape for semiconductor fixing of the present invention will be described.

FIGS. 2A and 2B are schematic views of a semiconductor chip fixed on a magnetic tape for fixing before and after a semiconductor shielding process according to an embodiment of the present invention. FIG.

The shape of the semiconductor fixing magnetic tape 210 is deformed along the outer periphery of the plurality of solder balls 222 welded to the lower surface of the semiconductor chip body 221 when the semiconductor chip 220 is loaded, And the shape of the magnetic tape 210 deformed by the softness and the magnetism of the metal thin film layer 213 in the magnetic tape 210 can be maintained without restoring.

FIG. 6 is a photograph of the semiconductor chip after fixing the semiconductor chip fixed on the semiconductor fixing magnetic tape according to the embodiment of the present invention. FIG. Referring to FIG. 6, it can be seen that the shape of the magnetic tape deformed by the softness and the magnetism of the metal thin film layer in the magnetic tape can be maintained without restoring the shape of the magnetic tape for fixing according to the present invention. This can prevent the phenomenon that the semiconductor chip is lifted from the semiconductor fixing magnetic tape by the solder ball after the semiconductor chip is fixed to the semiconductor fixing magnetic tape according to the present invention. Accordingly, in the semiconductor shielding process of sputtering and spraying It is possible to prevent a back spill phenomenon in which a metal for shielding electromagnetic waves penetrates between the lower surface of the semiconductor chip and the chip fixing layer. In the conventional semiconductor fixing tape having an elastomer, when the size of the solder ball fused to the lower surface of the semiconductor chip is large, for example, when the diameter of the solder ball is 150 μm or more, the elasticity of the elastomer A space between the lower surface of the semiconductor chip and the semiconductor fixing tape is generated to cause back spill in the semiconductor shielding process. However, since the magnetic tape for semiconductor fixing according to the present invention includes the metal thin film layer 213, The semiconductor chip can be easily fixed regardless of its size.

If the thickness of the metal thin film layer is less than 5 占 퐉, the shape of the metal thin film layer may be restored or the metal thin film layer may be sheared when the semiconductor chip is loaded. When the thickness of the metal thin film layer is more than 100 m, the metal thin film layer is not easily deformed along the outer circumferential edge of the solder ball, or the thermal conductivity of the metal thin film layer is lowered, and the semiconductor chip is damaged by the heat generated in the semiconductor shielding process. It can be difficult.

The metal thin film layer may be a metal thin film commonly used in the art. Preferably, the metal thin film layer may be a metal foil made of a pure metal of Cu, Al, Sn, or Fe, When the metal foil is used as the metal foil layer, the effect of maintaining the shape of the deformed tape when the semiconductor chip is loaded is excellent and the heat conductivity is excellent, so that the heat generated during the semiconductor shielding process can be quickly transferred to the cooling plate, Thus, damage to the semiconductor chip can be prevented. If a metal thin film layer produced by a method of manufacturing a metal thin film layer known in the art without using a metal foil, for example, sputtering, is difficult to be formed to a desired thickness in the present invention or is formed to a desired thickness, Shear phenomenon may occur.

Next, the chip fixing layer included in the magnetic fixing magnetic tape of the present invention will be described.

The chip fixing layer serves to fix the chip in the semiconductor shielding process.

The chip-fixing layer may be formed using a pressure-sensitive adhesive commonly used in the art to fix a semiconductor, and may preferably be an acrylic or silicone pressure-sensitive adhesive.

If the thickness of the chip fixing layer is less than 5 mu m, the semiconductor chip itself may not be fixed. When the thickness of the chip fixing layer is more than 1000 mu m, the thickness of the chip fixing layer may be excessively The metal thin film layer may be thick and the shape of the metal thin film layer may be difficult to deform along the lower surface of the semiconductor chip and the outer circumferential edge of the solder ball, thereby causing a backspill phenomenon during the semiconductor shielding process.

When the magnetic field dispersion layer is interposed between the metal thin film layer and the protective layer, the thickness of the chip fixing layer is 5 占 퐉 or more, 90% or less of the solder ball height, more preferably 5 占 퐉 or more, The thickness of the chip fixing layer may be 5 占 퐉 or more. If the thickness of the chip fixing layer is 90% or less of the height of the solder ball, the metal thin film layer may be easily deformed according to the peripheral surface of the semiconductor chip and the outer periphery of the solder ball. So that the chip fixing layer is brought into close contact with the lower surface of the semiconductor chip and the outer peripheral edge of the solder ball. When the thickness of the chip fixing layer is 5 mu m or more and the solder ball height is 60% or less of the solder ball height, the metal thin film layer may be more easily deformed along the outer peripheral edge of the solder ball and the lower surface of the semiconductor chip, The effect that the fixing layer is brought into close contact with the lower surface of the semiconductor chip and the outer peripheral edge of the solder ball can be more excellent.

In addition, when the magnetic field dispersion layer is interposed between the chip fixing layer and the metal thin film layer, the thickness of the chip fixing layer may be changed to improve the effect that the metal thin film layer deforms along the outer peripheral edge of the semiconductor chip lower surface and the solder ball. In this case, the sum of the thicknesses of the chip-fixing layer and the magnetic-field-dispersive layer is 5 m or more, 90% or less of the solder ball height, more preferably 5 m or more, If the sum of the thicknesses of the chip-fixing layer and the magnetic-field-dispersive layer is 5 m or more and the solder ball height is 90% or less, the metal foil layer is easily deformed along the outer periphery of the solder ball and the lower surface of the semiconductor chip So that the effect that the chip fixing layer adheres to the lower surface of the semiconductor chip and the outer peripheral edge of the solder ball can be excellent. When the sum of the thicknesses of the chip-fixing layer and the magnetic-field-dispersive layer is 5 mu m or more and the solder ball height is 60% or less, the metal foil layer is more easily deformed depending on the lower surface of the semiconductor chip and the outer periphery of the solder ball So that the effect that the chip fixing layer is brought into close contact with the outer peripheral edge of the solder ball and the lower surface of the semiconductor chip can be more excellent.

Next, the magnetic field dispersion layer included in the magnetic fixing tape for semiconductor fixing of the present invention will be described.

The magnetic metal dispersion powder may include a magnetic metal powder and a binder. The magnetic metal powder may perform a magnetic field dispersing function. At the same time, the magnetic metal powder may improve the adhesion of the magnetic metal powder to the cooling plate. Can be improved. In addition, since the magnetic field dispersion layer includes the magnetic metal powder, the thermal conductivity of the tape can be further improved, so that the effect of cooling the heat generated in the semiconductor shielding process can be further improved.

The magnetic metal powder contained in the magnetic field dispersion layer may be selected from the group consisting of pure iron, carbonyl iron, Fe-Si alloy, Fe-Si-Cr alloy, Fe-Si- alloy, permalloy, and molybdenum permalloy), and more preferably carbonyl iron.

The magnetic domain dispersion layer may contain at least one selected from the group consisting of acrylic resin, silicone resin, epoxy resin, polyvinyl chloride resin, polyester resin, polyethylene resin and polyurethane resin.

The magnetic metal powder may be included in the magnetic field dispersion layer in an amount of 1 to 90 parts by weight based on 100 parts by weight of the binder. If the magnetic metal powder is included in an amount of less than 1 part by weight based on 100 parts by weight of the binder, The magnetic field dispersion effect is not expressed at a desired level or the adhesion between the magnetic tape and the cooling plate is lowered and the thermal conductivity of the magnetic tape may be lowered. When the magnetic tape dispersion is more than 90 parts by weight, The lower surface of the semiconductor chip may not be completely adhered to the tape when the semiconductor chip is fixed or may cause shearing of the metal thin film layer due to the protruded magnetic metal powders to lower the thermal conductivity of the metal thin film layer, .

If the thickness of the magnetic field dispersion layer is less than 10 mu m, the magnetic metal powder may protrude from the surface of the magnetic field dispersion layer, The thermal conductivity of the metal thin film layer may be lowered due to the shear phenomenon of the metal thin film layer due to the magnetic metal powders not completely adhered to the tape or protruded. When the thickness exceeds 200 m, the thickness of the tape itself increases and the thermal conductivity is lowered Damage to the semiconductor chip may occur due to heat generated in the semiconductor shielding process.

The stacking order of the protective layer, the magnetic field dispersing layer, the metal thin film layer, and the chip fixing layer included in the semiconductor fixing magnetic tape according to the present invention is such that the protective layer is the lowest part and the chip fixing layer is the uppermost part, The magnetic thin-film layer, and the chip-immobilization layer may be stacked in this order. However, as shown in FIG. 3, the protective layer, the metal-foil layer, the magnetic-field dispersion layer, .

Next, a magnetic tape for semiconductor fixing according to still another aspect of the present invention includes a chip fixing layer for fixing the semiconductor chip in close contact with a lower surface of a semiconductor chip having a stepped portion due to a solder ball, The deformed shape is maintained after the shape is deformed so as to be closely contacted with the semiconductor chip so that the chip is prevented from being damaged from the heat generated in the sputtering or spray type semiconductor shielding process and the electromagnetic wave shielding metal is permeated between the lower surface of the semiconductor chip and the chip fixing layer A metal thin film layer and a protective layer for preventing a back spill phenomenon, and the chip fixing layer includes a magnetic metal powder. In this case, it is possible to include the magnetic metal powder in the chip fixing layer so as not to include a separate magnetic field dispersion layer, and to perform the role of dispersing the magnetic field and increasing the adhesion with the cooling plate.

The structure of the protective layer, the metal thin film layer, the chip fixing layer, and the magnetic metal powder contained in the magnetic tape for semiconductor fixing according to still another embodiment of the present invention is the same as the above-mentioned contents, and thus a detailed description thereof will be omitted.

4 is a cross-sectional schematic diagram of a magnetic tape for fixing according to another embodiment of the present invention. 4, the semiconductor fixing magnetic tape 400 includes a protective layer 410, a metal thin film layer 430, and a chip fixing layer 420 including a magnetic metal powder and a binder for fixing the semiconductor chip The chip fixing layer 420 including the binder for fixing the semiconductor chip without the magnetic field dispersion layer may have the effect of improving the magnetic field dispersion effect and the adhesion with the cooling plate by including the magnetic metal powder.

The binder containing the chip fixing layer may be a binder having adhesive property, which is generally used in the art to fix a semiconductor, and may preferably be an acrylic or silicone adhesive.

Hereinafter, the present invention will be described in more detail with reference to preferred embodiments.

(Example 1)

100 parts by weight of a silicone resin as a binder, and 60 parts by weight of carbonyl iron and a solvent were mixed to prepare a composition for forming a magnetic field dispersed layer. The composition for forming a magnetic field dispersion layer was coated on a PET film (thickness: 12 mu m) as a protective layer to form a magnetic field dispersion layer (thickness: 50 mu m). Next, an aluminum foil (thickness: 12 mu m) was provided as a metal thin film layer on the magnetic field dispersion layer. A silicon fixing agent layer was applied on the metal thin film layer to form a chip fixing layer (thickness: 10 mu m) to prepare a magnetic tape for semiconductor fixing.

(Example 2)

An aluminum layer was formed in the same manner as in Example 1 except that a sputtering device was used in place of the aluminum foil to produce a semiconductor fixing tape.

(Comparative Example 1)

A PI tape on which a heat-resistant silicone adhesive layer (thickness: 10 占 퐉) was formed on a polyimide film (thickness: 12 占 퐉) was prepared.

(Experimental Example 1)

After a semiconductor chip (solder ball height: 30 탆) was fixed on the magnetic tapes of Examples 1 and 2 and the PI tape of Comparative Example 1, an electromagnetic wave shielding process was performed by a sputtering method using silver (Ag) Respectively. After performing the electromagnetic wave shielding process, it was confirmed whether a back spill phenomenon by silver (Ag) occurred on the lower surface of the semiconductor chip.

5A and 5B are photographs of the lower surface of the semiconductor chip in which the electromagnetic wave shielding step was performed using the PI tape of Comparative Example 1 and the magnetic tape for fixing semiconductor of Example 1, respectively.

Referring to FIG. 5A, it can be seen that the backside spill phenomenon occurs due to the penetration of silver into the edge portion of the semiconductor chip.

On the other hand, referring to FIG. 5B, it can be seen that no backspill phenomenon occurs.

On the other hand, in the semiconductor fixing tape according to Example 2, the shearing of the aluminum layer occurred, and the semiconductor fixing magnetic tape did not closely contact the lower surface of the semiconductor chip when the semiconductor chip was fixed.

(Experimental Example 2)

The magnetic tape for semiconductor fixation of Example 1 and the PI tape of Comparative Example were measured for thermal conductivity according to ASTM E1530. The results are shown in Table 1 below.

division Thermal conductivity (W / mK) Example 1 2.55 Comparative Example 1 0.8

Referring to Table 1, it can be seen that the magnetic tape for fixing according to Example 1 has a significantly higher thermal conductivity than the PI tape according to Comparative Example 1. [

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

111: Protective layer
112: semiconductor chip fixing layer
110: semiconductor fixing tape
120: semiconductor chip
121: semiconductor chip body
122: solder ball
130: electromagnetic wave shielding layer
210: magnetic tape for semiconductor fixing
211: Protective layer
212: magnetic field dispersion layer
213: metal thin film layer
214: Chip fixing layer
220: Semiconductor chip
221: semiconductor chip body
222: Solder ball
230: electromagnetic wave shielding layer
300, 400: magnetic tape for semiconductor fixing
310, 410: protective layer
320: magnetic field dispersion layer
330, 430: metal thin film layer
340, 420: Chip fixing layer

Claims (10)

A chip fixing layer for closely fixing the semiconductor chip with the bottom surface of the semiconductor chip having the stepped portion due to the solder ball;
A metal thin film layer for preventing chip damage from heat generated in a semiconductor shielding process by sputtering or spraying and for preventing a back spill phenomenon in which a metal for shielding electromagnetic waves penetrates between a lower surface of the semiconductor chip and the chip fixing layer;
A magnetic field dispersive layer comprising a magnetic metal powder and a binder; And
A protective layer;
The magnetic tape for semiconductor fixing.
The method according to claim 1,
Wherein the thickness of the chip fixing layer is 5 to 1000 占 퐉.
The method according to claim 1,
Wherein the metal thin film layer is made of a pure metal of Cu, Al, Sn or Fe, or a metal foil having a thickness of 5 to 100 mu m,
The method according to claim 1,
The magnetic metal powder may be selected from the group consisting of pure iron, carbonyl iron, Fe-Si alloy, Fe-Si-Cr alloy, Fe-Si-Al alloy, Wherein the magnetic tape is at least one selected from the group consisting of ferrite (Mn-Zn ferrite), permalloy, and molybdenum permalloy.
The method according to claim 1,
Wherein the protective layer is any one selected from the group consisting of a polyethylene terephthalate film (PET film), a polyimide film (PI film), and a polyethylene film (PE film).
The method according to claim 1,
Wherein the magnetic field distribution layer is interposed between the metal thin film layer and the protective layer, the thickness of the chip fixing layer is 5 占 퐉 or more and 90% or less of the height of the solder ball,
Wherein the sum of the thicknesses of the chip fixing layer and the magnetic film dispersion layer is 5 占 퐉 or more and 90% or less of the height of the solder ball interposed between the chip fixing layer and the metal thin film layer.
The method according to claim 1,
Wherein the magnetic metal powder is contained in an amount of 1 to 90 parts by weight based on 100 parts by weight of the binder.
The method according to claim 1,
And the thickness of the magnetic field dispersion layer is 10 to 200 占 퐉.
The method according to claim 1,
Wherein the chip fixing layer comprises acrylic or silicone adhesive.
A chip fixing layer for containing the magnetic metal powder and closely contacting the lower surface of the semiconductor chip having the stepped portion due to the solder ball to fix the semiconductor chip;
A metal thin film layer for preventing chip damage from heat generated in a semiconductor shielding process by sputtering or spraying and for preventing a back spill phenomenon in which a metal for shielding electromagnetic waves penetrates between a lower surface of the semiconductor chip and the chip fixing layer; And
A protective layer;
The magnetic tape for semiconductor fixing.

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