KR101460709B1 - Laminated and integrated tape for taping the FPCB - Google Patents

Abstract

More particularly, the present invention relates to a laminated tape having a main adhesive sheet on which a receiving hole for receiving an electrical contact pattern formed on an object to be mounted is formed and whose adhesion rate is changed by heat, A dome sheet disposed on the main adhesive sheet to block foreign matter from entering between the main adherend and the object to which the main adhesive sheet is adhered, and a sub-adhesive disposed between the main adhesive sheet and the dome sheet, Sheet, and the main adhesive sheet is made of a thermosetting adhesive material, thereby improving adhesion and waterproofing, as well as reducing the number of assembling steps and improving product productivity.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an integrated laminated tape for attaching a flexible circuit board,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a monolithic laminated tape for mounting a flexible printed circuit board (FPCB), and more particularly to a laminated monolithic laminate for a flexible circuit board Tape.

2. Description of the Related Art Generally, a flexible printed circuit board (FPCB) is a flexible printed circuit board (PCB) that is more flexible than a hard printed circuit board (PCB), and is used in various electronic apparatuses.

The flexible circuit board is an electronic circuit component in which an electrical contact pattern is formed on a flexible thin plate. Depending on the number of layers of the electronic circuit, there are a single-sided flexible circuit board, a double-sided flexible circuit board and a multi-layer flexible circuit board.

The flexible circuit board may have a plurality of electrical contact patterns formed on a copper plate to form contact terminals, and a dome type contactor (also referred to as a 'metal dome') may be installed on the copper plate to contact a plurality of patterns. And a protective cover film covering the dome-type contactor can be laminated on the flexible circuit board.

Meanwhile, the flexible circuit board may be provided with a reinforcing plate having a plurality of holes capable of accommodating the dome type contactor between the copper plate and the protective cover film, and the flexible circuit board may be formed by bonding the protective cover film and the reinforcing plate by thermal compression have.

In the protective cover film, a dome-type contactor is positioned between one surface of a double-sided tape and an upper surface of a flexible circuit board using a double-sided tape, and then the dome-type contactor contacts a plurality of contact terminals, A dome type contactor is coupled to the upper surface of the flexible circuit board and then a protective film made of PET (polyethylene terephthalate) is attached to the other surface of the double-sided tape corresponding to the upper surface, .

KR 10-0925155 B1 (2009.10.29.)

The protective cover film according to the prior art is used for circuit protection of the substrate surface. The operator first sets the dome-type contactor to the correct position using the double-sided tape, firstly joins the upper surface of the flexible circuit board, There is a problem that the time required for assembling is increased because a protective film of a material must be attached. Such a problem leads to a decrease in the production rate.

On the other hand, the reason why the protective film is attached to the flexible circuit board using the double-sided tape is to prevent foreign matter from entering. The protective cover film according to the prior art depends on the adhesive strength of the pure double-sided tape. And the dome shape of the dome-type contactor may cause a floating phenomenon, which may result in deterioration of the waterproof property, and the separation of the protective film due to the decrease of the adhesive force may occur.

In addition, since the protective cover film according to the prior art has a main purpose of circuit protection of a miniaturized electronic device, it is required to adhere to a narrow area at the time of operation, which requires a high degree of precision.

In recent years, a technique of attaching a protective cover film by a heat fusion bonding method has been proposed in order to solve such a problem. However, since it is a method of thermally fusing a protective cover film through a thermoplastic adhesive material, work at a high temperature is inevitable It is pointed out that not only the deformation of the compression jig used in fusion welding but also the defect rate due to the low heat resistance of the adhesive (flexible circuit board) is increased.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above technical problems, and it is an object of the present invention to provide an integrated laminated tape for mounting a flexible circuit board, which improves the production rate, improves the waterproofness and adhesion rate of the bonding site, The purpose of that is to do.

The integrated laminated tape for attaching a flexible circuit board according to the present invention comprises a main adhesive sheet (thermosetting bonding) in which a receiving hole for receiving an electrical contact pattern formed on an object to be attached is formed, A dome sheet (PI) disposed at an upper portion of the main adhesive sheet to block foreign matter from entering between the main adherend and an object to which the main adhesive sheet is adhered; And the main adhesive sheet is made of a thermosetting adhesive material.

Here, the main adhesive sheet may be a film-type adhesive sheet which is bonded by a thermal fusion bonding method in which heat is applied to the surface at a predetermined temperature to adhere to the object to be adhered.

Further, the sub-adhesive sheet may be formed of any one of acrylic material and silicon material.

The auxiliary adhesive sheet is a sheet made of an acrylic material when the adhesion hardness between the main adhesive sheet and the dome sheet is not more than a predetermined value, , It may be a sheet made of a silicon material.

Also, the object to be attached may be an FPCB which generates an electrical contact inside the cellular phone.

In addition, the object to be attached may be an FPCB that generates an electrical contact inside the portable multimedia player.

Further, the object to be attached may be an FPCB causing an electrical contact inside the navigation.

A dome-type contactor for contacting the electrical contact pattern is disposed in the receiving hole. When the dome sheet is bonded to the main adhesive sheet, a concave upper surface may be adhered to the sub- have.

The dome sheet may be made of a polyimide resin.

The integrated laminated tape for attaching a flexible printed circuit board (FPCB) according to the present invention is an integrated laminated tape for mounting an integrated laminated tape composed of a main adhesive sheet, a sub adhesive sheet, and a dome sheet, It is possible to shorten the assembling process time by bonding the FPCB by a simple process of bonding the FPCB in a thermal fusion bonding manner in order to protect the contact pattern.

In addition, the integrated laminated tape is adhered to the FPCB by the heat fusion bonding method, so that the adhesive strength is improved and the waterproof property is improved.

In addition, when the main adhesive sheet is provided with a thermosetting adhesive material capable of applying a thermal fusion bonding method at a low temperature, it is possible to reduce the defective rate of the adhesive (flexible circuit board) It is possible to prevent the thermal deformation of the compression jig to be fixed.

1 is a perspective view showing an integral laminated tape for attaching a flexible circuit board according to the present invention,
Fig. 2 is an exploded perspective view showing the integral laminated tape for attaching the flexible circuit board of Fig. 1,
3 is a cross-sectional view taken along line AA in Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of an integrated laminated tape for attaching a flexible printed circuit board (FPCB) according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is an exploded perspective view showing an integral laminated tape for attaching a flexible circuit board according to the present invention, FIG. 2 is an exploded perspective view showing an integral laminated tape for attaching a flexible circuit board of FIG. 1, and FIG. 3 is a cross- to be.

1 to 3, a preferred embodiment of the integral laminated tape 100 for FPCB attachment according to the present invention includes a main adhesive sheet 60 whose adhesion rate is changed by heat, A dome sheet 80 disposed on the upper surface of the main adhesive sheet 60 so as to cover the upper portion and a sub adhesive sheet 70 mediating the coupling between the main adhesive sheet 60 and the dome sheet 80 do.

The main adhesive sheet 60 may be made of a thermosetting adhesive material as a material having a change in the adhesive ratio by heat and may be thermally pressed on the surface at a predetermined temperature to form an adherend (hereinafter referred to as " adherend 10 & And is attached to the adherend 10 by a thermal fusion bonding method in which the adhesive is adhered.

More specifically, the main adhesive sheet 60 is bonded to a dome sheet 80 as a thermosetting adhesive, which will be described later, to constitute the integral laminated tape 100 according to the present invention. When the surface of the main adhesive sheet 60 is pressed by the heat fusion bonding method, the adhesion rate is changed by heat. In order to bond the dome sheet 80 to the surface of the adherend 10 by the heat fusion bonding method And a thin sheet.

The hot-setting adhesive sheet 60 is an adhesive that is cured at a temperature of 100 ° C or higher. When heated, it adheres in a short period of time. When cured after bonding, it can have a higher adhesive hardness and can have high heat resistance .

As the thermosetting adhesive sheet 60, a heat-sealable film-type adhesive sheet such as an HBA (Heat-Bonding Adhesive) is preferably used. The thermosetting adhesive sheet 60 can have a thickness of 3 to 5 times the thickness of the dome sheet 80 in consideration of the firm bonding between the dome sheet 80 and the surface of the adherend 10, May have a thickness of 1.5 to 2.5 times the thickness of the complex (10).

On the other hand, the size of the thermosetting adhesive sheet 60 may be the same size as the dome sheet 80 and the adherend 10. However, the heat-curable adhesive sheet 60 is not necessarily formed to have the same size as the adherend 10, and the thermosetting adhesive sheet 60 is a structure for attaching the dome sheet 80 to the adherend 10, The function of the electric contact patterns 2 and 4 formed on the adherend 10 is limited to cover the electrical contact patterns 2 and 4 to prevent foreign matter from flowing in. No matter what size it is.

Such a thermosetting adhesive sheet 60 may be formed with receiving holes 66 and 68 for receiving the dome-type contactor 20 to be described later.

On the other hand, in a preferred embodiment of the integral laminated tape 100 for FPCB attachment according to the present invention, the adherend 10 to which the main adhesive sheet 60 described above is attached forms the electrical contact pattern 2 (4) However, the present invention is limited to the FPCB 10 (Flexible Printed Circuit Board) for convenience of explanation.

Particularly, the FPCB 10 is an FPCB (FPCB) used in a mobile phone, a notebook, an electronic organizer, a personal digital assistant, a digital camera and a navigation, a portable multimedia player (PMP) (10) can be a good example.

1 and 2, the FPCB 10 includes a base 10 having a plurality of electrical contact patterns 2 and 4 on one surface thereof, a plurality of electrical contact patterns 2 and 4, An upper coverlay 30 attached to the upper surface of the base 10 and provided with receiving holes 26 and 28 for receiving the dome type contactor 20, And a reinforcing plate 50 attached to a lower surface of the lower coverlay 40. The reinforcing plate 50 is attached to the lower surface of the lower cover rayon 40,

The base 10 includes a body portion 6 in which a plurality of electrical contact patterns 2 and 4 are formed, a terminal portion 7 connected to the outside, a neck portion 8 connecting the body and the terminal portion 7, . ≪ / RTI >

A plurality of electrical contact patterns 2 and 4 may be formed together in the body portion 6 and may be formed as an outer pattern 2 in which one of the plurality of electrical contact patterns 2 and 4 is formed into a ring shape And the other one of the plurality of electrical contact patterns 2 and 4 may be composed of the inner pattern 4 located inside the outer pattern 2. [

The dome-type contactor 20 is provided to be in contact with the outer pattern 2, and when the concave upper surface of the dome-type contactor 20 is pressed by an external force, the dome-type contactor 20 is brought into contact with the inner pattern 4, do.

The base 10 is a flexible film with a circuit board including a plurality of electrical contact patterns 2 and 4. More specifically, the base 10 has an upper surface adhesive 12 on the upper surface of a polyimide resin 11, an upper copper layer 13 on the upper surface adhesive 12, 13, the upper copper plating layer 17 is located.

The lower copper layer 16 is located under the lower surface adhesive 15 and the lower copper layer 16 is formed on the lower copper plating layer 16 17). The upper surface adhesive 12 and the upper copper layer 13 and the upper copper plating layer 17 are located only on the body portion 6 and the terminal portion 7 and not on the neck portion 8. [ The lower adhesive layer 15 and the lower copper layer 16 and the lower copper plating layer 17 may be located in the body portion 6, the terminal portion 7 and the neck portion 8.

On the other hand, the dome-type contactor 20 can have a bottom open and a space formed therein. The dome type contactor 20 may be made of a metal dome made of a metal. The dome type contactor 20 can be mounted on the upper surface of the base 10 so as to be positioned inside the receiving holes 26, 28, 66 and 68, Can be brought into contact with the outer pattern (2). When the dome-type contactor 20 is pressed on the upper surface by an external force, the pressed portion is brought into contact with the inner pattern 4 to make an electrical contact between the outer pattern 2 and the inner pattern 4. [

The upper coverlay 30 is located in the body portion 6 and is not located in the terminal portion 7 and the neck portion 8. [ The receiving holes 26 and 28 can be opened through the upper coverlay 30 in the vertical direction. The upper coverlay 30 is provided with a bottom adhesive on the lower surface of the polyimide resin 31. The lower cover adhesive 30 can be adhered to the upper surface of the upper copper plating layer 17 (17) of the base 10.

The lower coverlay 40 can protect the bottom surface of the base 10. The lower coverlay 40 is located at the body portion 6 and the neck portion 8 and is not located at the terminal portion 7. [ In the lower cover layer 40, the upper surface adhesive is placed on the upper surface of the polyimide resin 41. The lower coverlay 40 can be adhered to the lower surface of the lower copper plating layer 17 (17) of the base 10 by the upper surface adhesive.

The reinforcing plate 50 may be made of KAPTON tape. In the reinforcing plate 50, the upper surface adhesive is placed on the upper surface of the polyimide resin 51. The upper face adhesive can be adhered to the lower face of the polyimide resin 41 of the lower coverlay 40. [ The gusset plate 50 is located in the body portion 6 and is not located in the terminal portion 7 and the neck portion 8. [

As described above, a preferred embodiment of the integral laminated tape 100 for FPCB attachment according to the present invention is attached to the upper surface of the FPCB 10 having such a structure to protect the circuit portion including the electrical contact patterns 2 and 4 .

In a preferred embodiment of the integral laminated tape 100 for FPCB attachment according to the present invention, the dome sheet 80 can form the upper surface appearance of the flexible circuit board. The dome sheet 80 may be made of a polyimide resin 41. The dome sheet 80 may have the same thickness as the sub-adhesive sheet 70 described later.

Meanwhile, in a preferred embodiment of the integral laminated tape 100 for FPCB attachment according to the present invention, the sub-adhesive sheet 70 can adhere the dome type contactor 20 to the dome sheet 80, Curable adhesive sheet 60 when the adhesive sheet (main adhesive sheet 60) is heat-sealed.

The sub-adhesive sheet 70 may be made of any one of an acrylic material and a silicon material. More specifically, the sub-adhesive sheet 70 is preferably formed of a sheet made of an acrylic material when the required hardness of the main adhesive sheet 60 and the dome sheet 80 is less than a predetermined value, When the required hardness of the adhesive 60 between the dome sheet 80 and the dome sheet 80 exceeds a predetermined value, the sheet may be made of a silicone material.

Here, the required value of the adhesive hardness is not defined, and it is an arbitrary number that can be selected according to the required adhesive hardness according to the type of the flexible circuit board to which the integrally laminated tape 100 for FPCB attachment according to the present invention is applied.

The sub-adhesive sheet 70 is firmly attached to the dome sheet 80 and covers the receiving holes 26, 28, 66 and 68 together with the dome sheet 80, (2) (4) or the circuit portion through the through-hole (20).

That is, when the dome sheet 80 is attached to the upper surface of the FPCB 10 by the sub-adhesive sheet 70 and the main adhesive sheet 60, the receiving holes 66 and 68 formed in the main adhesive sheet 60 The dome type contactor 20 receives the dome type contactor 20 when the dome sheet 80 is adhered to the upper surface of the FPCB 10 by the main adhesive sheet 60, ) Is fixed while being adhered to the concave upper surface.

When the portion of the dome sheet 80 positioned above the dome type contactor 20 is pressed by an external force, the dome sheet 80 is moved to the dome type contactor The dome-type contactor 20 is elastically deformed while being pressed downward to electrically contact the inner pattern 4 and the outer pattern 2, and then the dome-type contactor 20 is pressed against the concave upper surface of the dome- When the external force is removed from the upper portion of the middle dome type contactor 20, the concave upper surface of the dome-type contactor 20 that has been pushed is raised by the restoring force, and the dome- The electrical contact between the pattern 4 and the outer pattern 2 is released.

A preferred embodiment of the integral laminated tape 100 for mounting the FPCB according to the present invention is such that the main dome sheet 80 is adhered to the upper surface of the FPCB 10 in a heat- Since the heat-sealable film-type adhesive sheet such as HBA is applied to the sheet 60, there is an advantage that the assembly process can be simplified.

Further, since the main adhesive sheet 60 is made of a thermosetting adhesive material and the dome sheet 80 is made of a polyimide material, it is advantageous that the heat-sealing bonding method can be easily applied by having appropriate heat resistance.

In addition, the dome sheet 80 is adhered to the adherend 10 by using the main adhesive sheet 60 made of a thermosetting adhesive material by the thermal fusion bonding method, and as a result, the adhesive force and the waterproofing property can be improved.

A preferred embodiment of the integral laminated tape 100 for FPCB attachment according to the present invention is characterized in that the main adhesive sheet 60 for attaching the dome sheet 80 and the dome sheet 80 to the adherend 10 and the sub- The adhesive sheet 70 is integrally formed so that the heat fusion bonding method can be applied as it is, and the advantage of facilitating the delivery of the product can be provided.

Hereinafter, a preferred embodiment of the integral laminated tape for FPCB attachment according to the present invention will be described in detail with reference to the accompanying drawings. However, it should be understood that the embodiments according to the present invention are not limited to the above-described preferred embodiments, and that various modifications and equivalents may be made by those skilled in the art something to do. Therefore, it is to be understood that the true scope of the present invention is defined by the appended claims.

2,4: Pattern 10: Base
20: Dome type contactor 30: Upper coverlay
40: Lower coverlay 50: Reinforced plate
60: main adhesive sheet (thermosetting adhesive sheet)
70: Sub-adhesive sheet 80: Dome sheet
100: Integrated laminated tape

Claims (9)

A main adhesive sheet made of a thermosetting adhesive material having a receiving hole for receiving an electrical contact pattern formed on an object to be adhered and having a change in an adhesive ratio by heat;
A dome sheet disposed on the main adhesive sheet to block foreign matter from entering between the main adhesive sheet and the object to which the main adhesive sheet is adhered;
And a sub-adhesive sheet which is made of any one of an acrylic material and a silicon material in accordance with an adhesive force required between the main adhesive sheet and the dome sheet and which is disposed between the main adhesive sheet and the dome sheet and mediates the coupling of the main adhesive sheet and the dome sheet ,
When bonding to the object to be attached by the heat fusion bonding method,
Wherein the main adhesive sheet couples the dome sheet and the sub adhesive sheet to the object to be adhered, the sub adhesive sheet binds the dome sheet to the main adhesive sheet, and the dome sheet is disposed in the receiving hole, Wherein the dome sheet is adhered to the concave upper surface of the dome type contactor via the sub adhesive sheet, wherein the dome sheet is adhered to the concave upper surface of the dome type contactor contacting the electrical contact pattern. delete delete delete The method according to claim 1,
Wherein the object to be attached is an FPCB which causes an electrical contact in the inside of a cellular phone. The method according to claim 1,
Wherein the object to be attached is an FPCB that causes an electrical contact inside the portable multimedia player. The method according to claim 1,
Wherein the object to be adhered is an FPCB which causes an electrical contact inside the navigation. delete The method according to claim 1,
The dome sheet is made of a polyimide resin, and is laminated on a flexible circuit board.

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