KR101713171B1 - Bendable flexible metal copper clad laminate printed circuit board and method for manufacturing the same - Google Patents

Abstract

The flexible metal-copper-clad laminate printed circuit board includes a metal sheet including a plurality of rigid regions having a first thickness and a soft region located between the plurality of rigid regions and having a second thickness thinner than the first thickness, A copper foil layer stacked on the insulating layer to form a circuit pattern, and a protective layer stacked on the copper foil layer to protect the circuit pattern, . Thus, the flexible metal-copper-clad laminate printed circuit board can form a soft region that is disposed between a plurality of rigid regions through partial etching or step-wise routing.

Description

TECHNICAL FIELD [0001] The present invention relates to a flexible printed circuit board (PCB) laminate printed circuit board and a method of manufacturing the same, and a method of manufacturing the same. ≪ Desc / Clms Page number 1 >

The present invention relates to a technique for manufacturing a flexible metal-copper-clad laminated printed circuit board, and more particularly, to a method for manufacturing a flexible metal-copper-clad laminate printed circuit board by partially etching a part of a metal sheet, To a method of manufacturing a substrate.

The flexible metal-copper-clad laminate printed circuit board is a substrate which can be bent flexibly by forming a circuit pattern on a thin insulating film, and is widely used in portable electronic devices, automation devices or display products requiring flexibility and flexibility in mounting. In particular, the flexible metal-copper-clad laminated printed circuit board has been widely used in portable terminals such as smart phones, whose demand has been explosively increasing in recent years. For example, the flexible metal-copper-clad laminated printed circuit board is used in a display panel of an electronic device such as a cellular phone, a PDA, a notebook computer, or the like, or a Near Field Communication (NFC) antenna of a portable terminal. In addition, the flexible metal-copper-clad laminated printed circuit board is used in products requiring flexing and flexibility at the time of mounting, such as a headlight, a fog lamp, or a turn signal lamp of a vehicle.

The flexible metal-copper-clad laminate printed circuit board is manufactured by etching a copper foil laminated on a flexible substrate, or by printing a circuit pattern on a flexible insulating film with a conductive paste or conductive ink, followed by plating a circuit pattern.

The flexible metal copper clad laminate according to the related art is manufactured by completely etching the flexible section. The flexible metal copper clad laminate by this manufacturing process has a problem that it is damaged by the edge of the heat sink when the flexible section is bent.

Korean Patent Laid-Open No. 10-2015-0034460 discloses a flexible printed circuit board in which cracks are prevented from occurring even when used in a folded portion of a mobile terminal or the like by varying the section of the adhesive layer in the bent portion, The present invention relates to a flexible printed circuit board which can be applied to all apparatuses having a bent portion, and which can be manufactured without adding air and costs.

Korean Patent Laid-Open No. 10-2005-0077856 discloses a method of manufacturing a flexible printed circuit board, wherein polishing, plating, exposure, development and etching are performed using a support plate, and when the flexible printed circuit board is completed A method of manufacturing a flexible printed circuit board in which a support plate is removed to prevent defects in the manufacturing process.

Korean Patent Laid-Open No. 10-2015-0034460 (published on May 04, Korean Patent Publication No. 10-2005-0077856 (disclosed on Aug. 04, 2005)

One embodiment of the present invention seeks to provide a method of partially etching a portion of a metal sheet to form a soft region disposed between a plurality of rigid regions.

One embodiment of the present invention is to provide a method of forming a soft region that is arranged between a plurality of rigid regions by step-routing a partial region of a metal sheet.

One embodiment of the present invention is to provide a method of protecting a metal copper-clad laminate through a plurality of rigid regions and a soft region and performing heat dissipation.

In embodiments, the flexible metal-clad laminate printed circuit board may include a plurality of rigid regions having a first thickness and a plurality of rigid regions disposed between the plurality of rigid regions and having a soft region having a second thickness that is less than the first thickness An insulating layer laminated on the metal sheet and serving as an insulator with respect to the metal sheet, a copper foil layer stacked on the insulating layer to form a circuit pattern, and a copper foil layer laminated on the copper foil layer, And a protective layer for protecting the protective layer.

The soft region connects the plurality of rigid regions, and when the insulating layer is bent, it can be flexibly bent depending thereon.

The soft region may protect the insulation layer from external damage and may release heat transmitted from the insulation layer.

In one embodiment, the second thickness may correspond to 0.1 mm to 0.7 mm.

The metal sheet may further include a connection region disposed between the plurality of rigid regions and the soft region and stably connecting the plurality of rigid regions and the soft region.

In one embodiment, the connection region may form an angle with respect to a plane of the soft region.

In one embodiment, the soft region may be formed so that its inner side is deeper than its outer side.

In one embodiment, the second thickness of the soft region may correspond to 0.5 to 2 times the total thickness of the insulating layer, the copper foil layer, and the protective layer.

In one embodiment, the metal sheet may partially etch a portion of the metal sheet to form the plurality of rigid regions and the soft region.

In another embodiment, the metal sheet may form a plurality of rigid regions and the soft regions by depressing a portion of the metal sheet.

The protective layer may be implemented with a coverlay or ink.

Among the embodiments, a method of manufacturing a flexible metal-copper-clad laminate printed circuit board includes the steps of preparing a metal-clad laminate having an insulating layer and a copper foil layer sequentially laminated on a metal sheet, forming a circuit pattern on the metal- , Adhering a protective layer on the formed circuit pattern, forming a plurality of rigid regions having a first thickness and a soft region having a second thickness located between the plurality of rigid regions and thinner than the first thickness And removing a portion of the metal sheet.

In one embodiment, the step of removing a portion of the metal-clad laminate may include partially etching a portion of the metal sheet to form a soft region having the second thickness.

The step of removing a portion of the metal-clad laminate may include protecting a region corresponding to the plurality of rigid regions and partially etching the region corresponding to the plurality of rigid regions.

In one embodiment, the step of removing a portion of the metal-clad laminate may include partially etching a portion of the metal sheet so that the soft region has a thickness of 0.1 mm to 0.7 mm.

In another embodiment, the step of removing a portion of the metal-clad laminate may include forming a soft region having a second thickness by depressing a portion of the metal sheet.

The step of removing a portion of the metal copper clad laminate may include a stepwise routing of a part of the metal copper clad laminate so that regions corresponding to the soft regions have the same depth.

In one embodiment, the step of removing a portion of the metal copper clad laminate may include a stepwise routing of a portion of the metal copper clad laminate so that the inner side of the soft region is deeper than the outer side of the soft region.

In one embodiment, the step of removing a portion of the metal-clad laminate may include the step-routing of a portion of the metal sheet so that the soft region has a thickness of 0.1 mm to 0.7 mm.

The step of removing a portion of the metal copper clad laminate may include a stepwise routing of a portion of the metal copper clad laminate so as to form a connecting region stably connecting the plurality of rigid regions and the soft region.

The step of removing a portion of the metal copper clad laminate may include a stepwise routing of a portion of the metal copper clad laminate so that the connection region forms an angle with respect to a plane of the soft region.

The flexible metal-copper-clad laminated printed circuit board according to an embodiment of the present invention may form a soft region disposed between a plurality of rigid regions through partial etching.

The flexible metal-copper-clad laminated printed circuit board according to an embodiment of the present invention can provide a method of forming a soft region disposed between a plurality of rigid regions through stepped routing.

The flexible metal-copper-clad laminated printed circuit board according to an embodiment of the present invention can protect the metal-copper-clad laminate through the plurality of rigid regions and the soft region and perform heat dissipation.

1 is a view for explaining a flexible metal-copper-clad laminated printed circuit board according to an embodiment of the present invention.
2 is a view for explaining a flexible metal-copper-clad laminated printed circuit board according to another embodiment of the present invention.
3 is a view illustrating a flexible metal-copper-clad laminated printed circuit board according to another embodiment of the present invention.
Fig. 4 is a view for explaining an embodiment for manufacturing the flexible metal-copper-clad laminated printed circuit board shown in Fig.
Fig. 5 is a view for explaining another embodiment for manufacturing the flexible metal-copper-clad laminated printed circuit board shown in Fig.
Fig. 6 is a view for explaining another embodiment for manufacturing the flexible metal-copper-clad laminated printed circuit board shown in Fig.
Fig. 7 is a view for explaining another embodiment for manufacturing the flexible metal-copper-clad laminated printed circuit board shown in Fig.

The description of the present invention is merely an example for structural or functional explanation, and the scope of the present invention should not be construed as being limited by the embodiments described in the text. That is, the embodiments are to be construed as being variously embodied and having various forms, so that the scope of the present invention should be understood to include equivalents capable of realizing technical ideas. Also, the purpose or effect of the present invention should not be construed as limiting the scope of the present invention, since it does not mean that a specific embodiment should include all or only such effect.

Meanwhile, the meaning of the terms described in the present application should be understood as follows.

The terms "first "," second ", and the like are intended to distinguish one element from another, and the scope of the right should not be limited by these terms. For example, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

It is to be understood that when an element is referred to as being "connected" to another element, it may be directly connected to the other element, but there may be other elements in between. On the other hand, when an element is referred to as being "directly connected" to another element, it should be understood that there are no other elements in between. On the other hand, other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

It is to be understood that the singular " include " or "have" are to be construed as including the stated feature, number, step, operation, It is to be understood that the combination is intended to specify that it does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

In each step, the identification code (e.g., a, b, c, etc.) is used for convenience of explanation, the identification code does not describe the order of each step, Unless otherwise stated, it may occur differently from the stated order. That is, each step may occur in the same order as described, may be performed substantially concurrently, or may be performed in reverse order.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used predefined terms should be interpreted to be consistent with the meanings in the context of the related art and can not be interpreted as having ideal or overly formal meaning unless explicitly defined in the present application.

1 is a view for explaining a flexible metal-copper-clad laminated printed circuit board according to an embodiment of the present invention.

1, the flexible metal-copper-clad laminate printed circuit board 100 includes a metal sheet 110, an insulating layer 120, a copper foil layer 130, and a protective layer 140.

The metal sheet 110 may include a plurality of rigid regions 112 and a soft region 114. The plurality of rigid regions 112 may have a first thickness and the soft region 114 may be located between the plurality of rigid regions 112 and have a second thickness that is less than the first thickness. Here, the first thickness of the plurality of rigid regions 112 may correspond to the thickness of the metal sheet 110 before the partial etching or the depth routing is performed. In one embodiment, the metal sheet 110 may be formed of an aluminum sheet, a magnesium sheet, a copper sheet, or other heat-radiating material.

In one embodiment, the metal sheet 110 may be partially etched to form a plurality of rigid regions 112 and soft regions 114. More specifically, the portion corresponding to the plurality of rigid regions 112 may be protected to partially etch the metal sheet 110, and the portion corresponding to the soft region 114 may be partially etched by chemical solution or gas . Here, the partial etching means that only a part of the thickness is etched so that the soft region 114 can form the second thickness. That is, the metal sheet 110 may be partially formed of a plurality of rigid regions 112 having a first thickness and a soft region 114 having a second thickness by partially etching portions corresponding to the soft regions 114 have.

In another embodiment, the metal sheet 110 may be formed in a plurality of rigid regions 112 and soft regions 114, with a portion of the region being Depth Routed. More specifically, the portion of the metal sheet 110 corresponding to the soft region 114 can be step-wise routed. Here, stepped routing refers to mechanical milling only some of the thickness so that the soft region 114 can form the second thickness. That is, the metal sheet 110 may be formed of a plurality of rigid regions 112 having a first thickness and a soft region 114 having a second thickness by routing the portions corresponding to the soft regions 114 step by step have.

On the other hand, the soft area 114 may be formed by a router machine capable of performing the stepwise routing. More specifically, the router processing machine can form the soft region 114 through mechanical milling, and can perform stepped routing according to a predetermined routing depth. That is, the routing depth can be preset by the designer so that the soft region 114 can be formed with a second thickness. Therefore, the shape of the soft region 114 can be determined according to the setting of the routing depth. The router processing facility can set the routing depth to perform accurate stepped routing regardless of the surface shape of the metal sheet 110. [

The metal sheet 110 protects the insulating layer 120, the copper foil layer 130, and the protective layer 140 from external impact and can perform heat dissipation. More specifically, the soft region 114 connects the plurality of rigid regions 112 and can flex flexibly depending on when the insulating layer 120, the copper foil layer 130, and the protective layer 140 are bent. have. That is, the softened region 114 may protect the insulating layer 120, the copper foil layer 130, and the protective layer 140 from external damage and may release heat transferred from the insulating layer 120. Therefore, the flexible metal-copper-clad laminate printed circuit board 100 is manufactured by partially etching or step-wise routing a part of the metal sheet 110, thereby improving durability and heat radiation effect.

In one embodiment, the second thickness of the soft region 114 may correspond to 0.1 mm to 0.7 mm, though not necessarily limited thereto. For example, the second thickness of the soft region 114 may correspond to 0.4 mm.

The second thickness of the soft region 114 is not fixed to a specific value, and may be differently formed according to the structure and design requirements of the flexible metal-copper-clad laminate printed circuit board 100, for example. For example, the second thickness of the soft region 114 may correspond to a numerical value selected through experimentation or may be calculated through the following equation (1).

Here, d is the second thickness of the soft region, D is the total thickness of the insulating layer, the copper foil layer and the protective layer, X is a set value according to the metal type of the metal sheet, and?

In another embodiment, the second thickness of the softened region 114 may be formed to be 0.5 to 2 times the total thickness of the insulating layer 120, the copper foil layer 130, and the protective layer 140. Here, the second thickness of the soft region 114 is set to a thickness that allows the metal sheet 110 to be bent flexibly and stably protects the flexible metal-copper-clad laminated printed circuit board 100 and effectively performs heat dissipation .

The insulating layer 120 may be stacked on top of the metal sheet 110 to transfer heat to the metal sheet 110. The insulating layer 120 may be implemented through a material having a high thermal conductivity. That is, the insulating layer 120 can provide the metal sheet 110 with heat transferred from the copper foil layer 130, and the metal sheet 110 can emit heat. In one embodiment, the thickness of the insulating layer 120 is not necessarily limited to, but may be implemented as 0.1 mm to 1 mm.

The copper foil layer 130 is stacked on the insulating layer 120, and a circuit pattern can be formed on one surface thereof. The flexible metal-copper-clad laminate printed circuit board 100 may be driven according to a circuit pattern formed on the copper foil layer 130, and the copper foil layer 130 may be realized by at least one copper foil layer. When the copper foil layer 130 is formed of a plurality of copper foil layers, the copper foil layer 130 may include a plurality of circuit patterns.

The protective layer 140 may be stacked on the copper foil layer 130 to protect the circuit pattern of the copper foil layer 130. In one embodiment, the protective layer 140 may be implemented as a coverlay. The coverlay may be attached to the upper end of the copper foil layer 130 and laminated through a heat press. In one embodiment, the coverlay may correspond to an insulating film that protects the circuit pattern of the copper foil layer 130.

In another embodiment, the protective layer 140 may be implemented with a PSR ink (Photo Imageable Solder Resist Mask Ink). The PSR ink (Photo Imageable Solder Resist Mask Ink) is applied to the upper portion of the copper foil layer 130, and can be hardened (hereinafter, PSR process) through exposure and development processes. The flexible metal-organic copper-clad laminated printed circuit board 100 can protect the circuit pattern through the PSR process and prevent a solder bridge phenomenon.

2 is a view for explaining a flexible metal-copper-clad laminated printed circuit board according to another embodiment of the present invention.

2, a metal sheet 110 is disposed between a plurality of rigid regions 112 and a soft region 114 to form a plurality of rigid regions 112 and a plurality of soft regions 114, And may further include a connection area 210. Here, the thickness of the connection region 210 may be greater than the second thickness of the soft region 114 and less than the first thickness of the plurality of rigid regions 112.

The connection region 210 may form a certain angle? With respect to the plane of the soft region 114. In one embodiment, the constant angle [theta] may correspond to 30 degrees to 60 degrees. For example, the constant angle [theta] may correspond to 45 degrees. Here, the predetermined angle? May correspond to an angle at which the flexible region 114 can be flexibly bent and the plurality of rigid regions 112 and the flexible region 114 can be stably connected.

In one embodiment, the connection region 210 may be formed through Depth Routing. More specifically, the soft region 114 may be formed by a router processing facility capable of setting the routing depth, and the connection region 210 may be formed by a stepwise route in the process of forming the soft region 114. That is, a portion of the metal sheet 110 may be stepwise routed to form a plurality of rigid regions 112, a soft region 114, and a connecting region 210. The connection region 210 may form a certain angle? With respect to the plane of the soft region 114 based on the set routing depth.

3 is a view illustrating a flexible metal-copper-clad laminated printed circuit board according to another embodiment of the present invention.

In another embodiment, the soft region 114 may be formed such that the thickness is not constant. For example, referring to FIG. 3, the inner region of the soft region 114 may be formed deeper than the outer region. More specifically, the inner side of the soft region 114 may be partially etched or stepped to be etched deeper than the outer side of the soft region 114, and the soft region 114 may be formed such that its inner thickness is less than its outer thickness . Here, the thicknesses of the inner and outer sides of the soft region 114 are set so that the metal sheet 110 can be flexibly bent, and the flexible metal-clad laminated printed circuit board 100 can be stably protected and heat- It can be preset by the designer.

For example, the thickness of the soft region 114 may correspond to a numerical value selected through experimentation or may be calculated by the following equation (2).

D is the total thickness of the insulating layer, the copper foil layer and the protective layer, X is a set value in accordance with the metal type of the metal sheet,? Is an adjustment coefficient, L is the area boundary ( The soft region and the stiff region boundary) to a specific point in the spiritual region.

Fig. 4 is a view for explaining an embodiment for manufacturing the flexible metal-copper-clad laminated printed circuit board shown in Fig.

Referring to FIG. 4, a metal copper clad laminate may be prepared to manufacture the flexible metal copper clad laminated printed circuit board 100, and the metal copper clad laminate may include an insulating layer 120 and a copper foil layer 130, May be sequentially stacked on the metal sheet 110 (step S410).

A circuit pattern may be formed on the metal copper-clad laminate through exposure, development, and etching (step S420). More specifically, a photosensitive resin (Photo Resist) may be applied to the metal copper clad laminate, and a photosensitive liquid film may be formed on the upper surface thereof. The portion not covered with the photosensitive liquid film can be exposed by the exposure apparatus and the photosensitive liquid not exposed by the photosensitive liquid film can be removed through development. Finally, the metal copper-clad laminate can complete the circuit pattern through etching.

The protective layer 140 may be adhered to the metal-copper-clad laminate on which the circuit pattern is formed (step S430). In one embodiment, the protective layer 140 may be implemented as a coverlay. The coverlay may be stuck to the top of the metal copper-clad laminate and laminated through a heat press.

A symbol or letter to be marked on the surface of the metal-clad laminate may be printed (step S440). Here, the symbols or characters to be printed may correspond to product information such as customer name, product code, part number, part position, part type, and rated capacity.

The metal sheet 110 includes a plurality of rigid regions 112 having a first thickness and a plurality of rigid regions 112 disposed between the plurality of rigid regions and having a first thickness and a second thickness, Can be removed. More specifically, the metal sheet 110 may be partially etched to form a plurality of rigid regions 112 and soft regions 114 (Step S450). The portion corresponding to the plurality of rigid regions 112 may be protected to partially etch the metal sheet 110 and the portion corresponding to the soft region 114 may be partially etched by the chemical solution or gas. In one embodiment, the metal sheet 110 may be partially etched in a portion of its area such that the soft region 114 has a thickness of 0.1 mm to 0.7 mm. For example, the metal sheet 110 may partially be partially etched so that the soft region 114 has a thickness of 0.4 mm.

The metal-clad laminate may be cut along the periphery of the circuit pattern (step S460). The flexible metal-copper-clad laminate printed circuit board 100 can be completed in accordance with the above-described process. The flexible metal-copper-clad laminate printed circuit board 100 has excellent thermal conductivity and improved heat dissipation, and can be used in high-performance electronic devices.

The completed flexible metal-clad laminate printed circuit board 100 is subjected to a surface treatment process in which electrical performance is checked and oxidation is prevented (step S470). In one embodiment, the surface treatment process may correspond to a process such as OSP (Organic Solderability Preservative), TIN plating, and the like. For example, the flexible metal-copper-clad laminate printed circuit board 100 can be tested for its electrical performance through BBT (Bare Board Test) and can be surface-treated through an OSP (Organic Solderability Preservative) method. Here, the OSP method can prevent the circuit pattern from being in contact with the air by applying organic matter to the surface of the flexible metal-copper-clad laminate printed circuit board 100, thereby preventing oxidation of the circuit pattern.

Fig. 5 is a view for explaining another embodiment for manufacturing the flexible metal-copper-clad laminated printed circuit board shown in Fig.

Referring to FIG. 5, a metal copper clad laminate may be prepared to manufacture the flexible metal copper clad laminated printed circuit board 100, and the metal copper clad laminate may include the insulating layer 120 and the copper foil layer 130, May be sequentially stacked on the metal sheet 110 (step S510).

A circuit pattern may be formed on the metal copper-clad laminate through exposure, development, and etching (step S520).

The protective layer 140 may be adhered to the metal copper-clad laminate on which the circuit pattern is formed (step S530). In one embodiment, the protective layer 140 may be implemented as a coverlay.

A symbol or character to be marked on the surface of the metal-clad laminate may be printed (step S540).

The metal sheet 110 includes a plurality of rigid regions 112 having a first thickness and a plurality of rigid regions 112 disposed between the plurality of rigid regions and having a first thickness and a second thickness, Can be removed. More specifically, the metal sheet 110 may be partially recessed to form a plurality of rigid regions 112 and a soft region 114 (Step S550).

In one embodiment, the metal sheet 110 is disposed between the plurality of rigid regions 112 and the soft region 114 to provide a connection that stably connects the plurality of rigid regions 112 and the soft region 114 Area 210. [0033] More specifically, the soft region 114 may be formed by a router processing facility capable of performing stepped routing, and the connection region 210 may be formed by step routing in the process of forming the soft region 114 . That is, a portion of the metal sheet 110 may be stepwise routed to form a plurality of rigid regions 112, a soft region 114, and a connecting region 210. The connection region 210 may form a certain angle? With respect to the plane of the soft region 114.

In another embodiment, the soft region 114 may be formed so that its inner side is deeper than its outer side by a router processing facility with a routing depth set. That is, the routing depth inside the soft region 114 may be set to be deeper than the routing depth outside the soft region 114, and the soft region 114 may have a different thickness from the outside to the inside. On the other hand, the metal sheet 110 can be stepped so that the soft region 114 has a thickness of 0.1 mm to 0.7 mm. For example, the metal sheet 110 may be stepped so that the soft region 114 has a thickness of 0.4 mm.

The metal-clad laminate can be cut along the periphery of the circuit pattern (step S560).

The completed flexible metal-clad laminated printed circuit board 100 is subjected to a surface treatment process in which electrical performance is checked and oxidation is prevented (step S570).

Fig. 6 is a view for explaining another embodiment for manufacturing the flexible metal-copper-clad laminated printed circuit board shown in Fig.

Referring to FIG. 6, a metal copper clad laminate in which an insulating layer 120 and a copper foil layer 130 are sequentially stacked on a metal sheet 110 may be prepared (step S610). A circuit pattern may be formed on the metal copper-clad laminate through exposure, development, and etching (step S620).

The metal-clad laminate may have a protective layer formed thereon. For example, the metal copper clad laminate can be cured by applying a PSR ink on the metal-on-copper-clad laminate and exposing and developing it (step S630). That is, the flexible metal-copper-clad laminated printed circuit board 100 can protect the circuit pattern through the PSR process and prevent lead bridge phenomenon.

The metal-clad laminate may be printed with symbols or characters to be marked on its surface (step S640). The metal sheet 110 may be partially etched to form a plurality of rigid regions 112 and soft regions 114 (Step S650). The metal copper-clad laminate can be cut along the periphery of the circuit pattern (step S660). The completed flexible metal-clad laminate printed circuit board 100 can be subjected to a surface treatment process in which the electrical performance is checked and oxidation is prevented (step S670).

Fig. 7 is a view for explaining another embodiment for manufacturing the flexible metal-copper-clad laminated printed circuit board shown in Fig.

Referring to FIG. 7, a metal copper clad laminate in which an insulating layer 120 and a copper foil layer 130 are sequentially stacked on a metal sheet 110 may be prepared (step S710). A circuit pattern may be formed on the metal copper-clad laminate through exposure, development, and etching (step S720). The metal-clad laminate may have a protective layer formed thereon. For example, the metal copper-clad laminate can be cured by applying a PSR ink thereon and exposing and developing it (step S730). The metal-clad laminate may be printed with symbols or characters to be marked on its surface (step S740).

The metal sheet 110 may be partially depressed to form a plurality of rigid regions 112 and soft regions 114 (Step S750). The metal-clad laminate can be cut along the periphery of the circuit pattern (step S760). The completed flexible metal-clad laminated printed circuit board 100 is subjected to a surface treatment process in which the electrical performance is checked and oxidation can be prevented (step S770).

The flexible metal-copper-clad laminate printed circuit board 100 can form a soft region disposed between a plurality of rigid regions through partial etching or step-wise routing, and protects the metal-clad laminate through the plurality of rigid regions and the soft region And the heat dissipation can be effectively performed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill 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 set forth in the following claims And changes may be made without departing from the spirit and scope of the invention.

100: Flexible metal copper-clad laminated printed circuit board
110: metal sheet
112: a plurality of rigid regions
114: soft region
210: Connection area

Claims (21)

A plurality of rigid regions having a first thickness, a second portion located between the plurality of rigid regions and thinner than the first thickness and inversely proportional to the total thickness of the insulating layer, the copper foil layer, and the protective layer, Wherein the inner side of the soft region is formed deeper than the outer side of the soft region and the thickness change is not abruptly formed between the plurality of the rigid regions and the soft region, A metal sheet including a connection region formed at 30 to 60 degrees with respect to a plane of the soft region to stably connect the plurality of rigid regions and the soft region;
An insulating layer stacked on the metal sheet and serving as an insulator with respect to the metal sheet;
A copper foil layer laminated on the insulating layer to form a circuit pattern; And
And a protective layer laminated on the copper foil layer to protect the formed circuit pattern.
2. The method of claim 1,
Wherein the plurality of rigid regions are connected to each other, and when the insulating layer is bent, the flexible metal foil laminated printed circuit board is bent depending thereon.
2. The method of claim 1,
Wherein the insulating layer is protected from external damage and releases heat transferred from the insulating layer.
delete delete delete delete 2. The method of claim 1,
Wherein the second thickness is 0.5 to 2 times the total thickness of the insulating layer, the copper foil layer, and the protective layer.
The metal sheet according to claim 1, wherein the metal sheet
Wherein the plurality of rigid regions and the soft region are formed by partially etching a portion of the metal sheet.
delete The method of claim 1,
Wherein the flexible printed circuit board is embodied as a coverlay or an ink.
Preparing a metal copper clad laminate in which an insulating layer and a copper foil layer are sequentially laminated on a metal sheet;
Forming a circuit pattern on the metal copper clad laminate;
Bonding a protective layer on the formed circuit pattern; And
A plurality of rigid regions having a first thickness, a second portion located between the plurality of rigid regions and thinner than the first thickness and inversely proportional to the total thickness of the insulating layer, the copper foil layer, and the protective layer, Wherein the inner side of the soft region is formed deeper than the outer side of the soft region and the thickness change is not abruptly formed between the plurality of the rigid regions and the soft region, And forming a connection region that stably connects the plurality of rigid regions and the soft region by forming a 30 to 60 degree relative to a plane of the soft region to remove a portion of the metal sheet. A method for manufacturing a laminated printed circuit board.
13. The method of claim 12, wherein removing the portion of the metal-
And partially etching a portion of the metal sheet to form a soft region having the second thickness. ≪ RTI ID = 0.0 > 21. < / RTI >
14. The method of claim 13, wherein removing the portion of the metal-
And protecting a region corresponding to the plurality of rigid regions, and partially etching the region corresponding to the plurality of rigid regions.
delete delete delete delete delete delete delete

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