TWI735244B - Rolled laminated structure and method for manufacturing the same - Google Patents

Abstract

A method for manufacturing a rolled laminated structure includes : providing a composite layer structure including a metal layer and a precursor coated on the metal layer; providing a magnetic element provided with escape grooves; rewinding the magnetic element and the composite layer structure to obtain an intermediate structure of the rolled laminated structure, parts of the magnetic element in adjacent layers being adsorbed to support the composite layer structure; baking the intermediate structure of the rolled laminated structure to cyclize the precursor to form a flexible film layer, thereby obtaining the roll-shaped laminated structure. A rolled laminated structure is further provided.

Description

Roll-like laminated structure and preparation method thereof

The invention relates to the field of flexible printed circuit boards, in particular to a roll-shaped laminated structure and a preparation method thereof.

Flexible copper clad laminate is the basic material for the production of flexible printed circuits. The flexible copper clad laminate includes an insulating resin layer and a copper foil laminated on the surface of the insulating resin, which can perform fine circuit processing and can be bent in a narrow space. The insulating resin layer is usually a polyimide film. In the prior art, the flexible copper clad laminate is usually prepared by the following method. After coating the polyamide acid solution on the copper foil, the entire roll is relaxed and high-temperature cyclization is used to form a polyimide film on the copper foil. . The whole volume is relaxed and high-temperature circularization adopts the standing style.

In order to meet the high frequency demand of electronic products, flexible copper clad laminates with thicker polyimide film and thinner copper foil are required. When baking in a standing manner, the copper foil coated with polyamic acid solution is not sufficiently supportive, coupled with the blow of air flow, rolled into a cylindrical shape of copper coated with polyamic acid solution The foil easily collapses into an imperfect circle, resulting in poor appearance. In addition, because the collapsed area is close to each other, it will hinder the volatilization of the solvent and cause sticking. Therefore, the industry uses roll to roll high temperature cyclization instead of standing high temperature cyclization, but the roll to roll high temperature cyclization can only high temperature cyclization one roll at a time, thereby reducing production capacity.

In view of this, it is necessary to provide a roll-like laminated structure with excellent appearance, non-stick and high productivity, and a preparation method thereof.

The present invention provides a method for preparing a rolled laminated structure, which includes the following steps: providing a composite layer structure, the composite layer structure including a metal layer and a precursor coated on the metal layer; providing a magnetic member, the magnetic The member is provided with an air escape groove; the magnetic member is rewound to face the precursor and the composite layer structure to obtain a roll-like laminated structure intermediate, wherein the magnetic members of adjacent layers are adsorbed to support the composite layer structure Baking the roll-shaped laminated structure intermediate to make the precursor cyclize to form a flexible film layer, thereby obtaining the roll-shaped laminated structure.

The present invention also provides a roll-shaped laminated structure, including: a composite layer structure, including a metal layer and a flexible film layer coated on the metal layer; and a magnetic member disposed on the composite layer structure facing the flexible film layer Above, the magnetic part is provided with an air escape groove; wherein, the magnetic parts of adjacent layers are adsorbed together to support the composite layer structure.

In the present invention, a roll-shaped laminated structure is prepared by rewinding and high-temperature baking of the magnetic component facing the precursor and composite layer structure of the composite layer structure, and the magnetic components of adjacent layers are adsorbed, thereby making the roll-shaped structure of the present invention The laminated structure has the following advantages: firstly, the adsorbed magnetic parts can support the composite layer structure to complete batch baking in a standing manner, and can prevent the composite layer structure from collapsing and becoming non-circular due to the blow of the airflow. , So as to increase productivity and obtain a flexible film layer with excellent appearance; second, the air escape groove on the magnetic member facilitates the discharge of the solvent, so as to avoid material sticking; third, after baking, the magnetic The piece can be separated from the composite layer structure, so the magnetic piece can be recycled and reused.

10: Composite layer structure

11: Metal layer

13: Precursor

111: coating area

113: Non-coated area

20: Magnetic parts

21: Escape slot

22: the first surface

23: second surface

24: side

30: Roll-like laminated structure intermediate

41: First Scroll

42: Second Scroll

43: Third Scroll

50: Flexible film

100: Roll-like laminated structure

Fig. 1 is a schematic diagram of a composite layer structure provided by an embodiment of the present invention.

Fig. 2 is a partial cross-sectional view of the clad layer structure shown in Fig. 1.

Fig. 3 is a schematic structural diagram of a magnetic member provided by an embodiment of the present invention.

Fig. 4 is a schematic diagram of rewinding the composite layer structure shown in Fig. 1 and the magnetic member shown in Fig. 3 to obtain a roll-like laminated structure intermediate body.

Fig. 5 is a plan view of the roll-like laminated structure intermediate body shown in Fig. 4.

Fig. 6 is a schematic diagram of a roll-like laminated structure provided by an embodiment of the present invention.

Fig. 7 is a partial cross-sectional view of the roll-like laminated structure shown in Fig. 6.

The technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

Note that unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the technical field of the present invention. The terminology used in the embodiments of the present invention is only for the purpose of describing specific embodiments, and is not intended to limit the present invention.

An embodiment of the present invention provides a method for preparing a rolled laminated structure, which includes the following steps: S1, providing a composite layer structure, the composite layer structure including a metal layer and a precursor coated on the metal layer; S2, Provide a magnetic member, the magnetic member is provided with an air escape groove; S3, rewind the magnetic member facing the precursor and the composite layer structure to obtain a rolled laminated structure intermediate; S4, bake the rolled shape The structural intermediate is laminated to cyclize the precursor to form a flexible film layer, thereby obtaining the roll-like laminated structure.

Please refer to FIGS. 1 and 2. In step S1, a composite layer structure 10 is provided. The composite layer structure 10 includes a metal layer 11 and a precursor 13 coated on the metal layer 11.

Specifically, the metal layer 11 includes a coating area 111 and a non-coating area 113 located on both sides of the coating area 111, and the precursor 13 covers the coating area 111. In an alternative embodiment, the precursor 13 may completely cover the coated area 111 and the non-coated area 113.

The precursor 13 forms a flexible film layer 50 after curing (see FIG. 6). The precursor 13 may be a polyamide acid solution, a liquid crystal polymer solution, or the like.

The metal layer 11 may be copper foil, silver foil, gold foil, or the like.

Please refer to FIG. 3. In step S2, a magnetic member 20 is provided, and the magnetic member 20 is provided with an air escape groove 21.

The magnetic member 20 has two opposite magnetic poles, such as an S pole and an N pole. Specifically, the magnetic member 20 includes a first surface 22 and a second surface 23 that are opposed to each other, and a plurality of side surfaces 24 connecting the first surface 22 and the second surface 23. Wherein, the first surface 22 is an S pole, and the second surface 23 is an N pole.

In this embodiment, both the first surface 22 and the second surface 23 are provided with the air escape groove 21. In an alternative embodiment, the air escape groove 21 may only be provided on the first surface 22 or the second surface 23. The two ends of the air escape groove 21 penetrate through two opposite side surfaces 24 for discharging the solvent in the precursor 13 during curing.

In this embodiment, in the length direction of the magnetic member 20, the projection of the air escape groove 21 provided on the first surface 22 along the thickness direction of the magnetic member 20 is the same as that provided on the second surface 23. The upper air escape grooves 21 are alternately arranged at intervals along the projection of the thickness direction of the magnetic member 20. In an alternative embodiment, the projection of the air escape groove 21 provided on the first surface 22 along the thickness direction of the magnetic member 20 and the air escape groove 21 provided on the second surface 23 along the The projections of the thickness direction of the magnetic member 20 may overlap. The cross section of the air escape groove 21 along the thickness direction of the magnetic member 20 may be square, semicircular, triangular, or the like.

Referring to FIG. 4, in step S3, the magnetic member 20 is rewound facing the precursor 13 and the composite layer structure 10 to obtain a roll-like laminated structure intermediate 30.

In this embodiment, the two magnetic parts 20 face the precursor 13 and are rewound to both sides of the composite layer structure 10 to obtain the roll-like laminated structure intermediate 30. Specifically, the two magnetic parts 20 are wound on the first reel 41, the composite layer structure 10 is wound on the second reel 42, and the two magnetic parts 20 face the precursor through a rewinding process. 13 is rewound to the two non-coated regions 113 of the metal layer 11 to obtain the roll-shaped laminated structure intermediate 30. The roll-shaped laminated structure intermediate body 30 is wound on the third reel 43. Preferably, the magnetic member 20 and the precursor 13 rewound on the non-coated area 113 of the metal layer 11 are arranged at intervals. Optionally, the magnetic member 20 may also be disposed on a side of the precursor 13 away from the metal layer 11. The thickness of the magnetic member 20 is slightly larger than the thickness of the precursor 13. In this embodiment, the thickness of the magnetic member 20 is 3-8 mm, the width of the magnetic member 20 is 5-10 mm, the width of the precursor 13 is 255-505 mm, and the width of the metal layer 11 is 270 ~540mm.

Referring to FIG. 5, in the roll-like laminated structure intermediate 30, the magnetic members 20 of adjacent layers are attracted together by different magnetic poles to support the composite layer structure 10 of each layer, so that the composite layer structure of each layer has stiffness. , So that it will not collapse when baking in a standing manner.

4 to 7, in step S4, the roll-shaped laminated structure intermediate 30 is baked in an oven, so that the precursor 13 is cyclized at a high temperature to form a flexible film layer 50, so as to obtain The roll-shaped laminated structure 100 is described.

Wherein, the baking system is completed in nitrogen, and the baking temperature is 200-380°C. When baking, the roll-shaped laminated structure intermediate body 30 is placed in the oven vertically in a whole roll, and baked in a standing manner. During baking, the solvent in the precursor 13 can be discharged from the air escape groove 21 so as to avoid material sticking.

After baking, the magnetic member 20 in the roll laminated structure 100 can be separated from the composite layer structure 10, so the magnetic member 20 can be recycled and reused.

6 and 7, an embodiment of the present invention also provides a rolled laminated structure 100, which includes a composite layer structure 10 and a magnetic member 20 disposed on the composite layer structure 10, and adjacent layers of magnetic members 20 Adsorbed together to support each layer of composite layer structure 10.

The composite layer structure 10 includes a metal layer 11 and a flexible film layer 50 coated on the metal layer 11. The metal layer 11 includes a coating area 111 and a non-coating area 113 disposed on both sides of the coating area 111, and the flexible film layer 50 covers the coating area 111. In an alternative embodiment, the flexible film layer 50 may completely cover the coated area 111 and the non-coated area 113.

The flexible film layer 50 can be a polyimide film, a liquid crystal polymer film, etc., which can be formed by high temperature curing of a corresponding precursor, such as a polyamide acid solution or a liquid crystal polymer solution.

The metal layer 11 may be copper foil, silver foil, gold foil, or the like.

The magnetic member 20 is disposed on the composite layer structure 10 facing the flexible film layer 50.

In this embodiment, the two magnetic elements 20 are disposed in the two non-coated regions 113 of the metal layer 11 facing the flexible film layer 50. Preferably, the magnetic member 20 and the flexible film layer 50 arranged on the non-coating area 113 of the metal layer 11 are arranged at intervals. Optionally, the magnetic member 20 may also be disposed on a side of the flexible film layer 50 away from the metal layer 11. The thickness of the magnetic member 20 is slightly larger than the thickness of the flexible film layer 50. In this embodiment, the thickness of the magnetic member 20 is 3 to 8 mm, the width of the magnetic member 20 is 5 to 10 mm, the width of the flexible film layer 50 is 255 to 505 mm, and the width of the metal layer 11 is 270~540mm.

Please refer to FIG. 3, the magnetic member 20 has two opposite magnetic poles, such as an S pole and an N pole. Specifically, the magnetic member 20 includes a first surface 22 and a second surface 23 that are opposed to each other, and a plurality of side surfaces 24 connecting the first surface 22 and the second surface 23. Wherein, the first surface 22 is an S pole, and the second surface 23 is an N pole.

The magnetic member 20 is provided with an air escape groove 21 for discharging the solvent in the precursor of the flexible film layer 50 during curing, so as to avoid material sticking. In this embodiment, both the first surface 22 and the second surface 23 are provided with the air escape groove 21. In an alternative embodiment, the air escape groove 21 may only be provided on the first surface 22 or the second surface 23. The two ends of the air escape groove 21 penetrate through two opposite side surfaces 24.

In this embodiment, in the length direction of the magnetic member 20, the projection of the air escape groove 21 provided on the first surface 22 along the thickness direction of the magnetic member 20 is the same as that provided on the second surface. The air escape grooves 21 on the surface 23 are alternately arranged at intervals along the projection of the thickness direction of the magnetic member 20. In an alternative embodiment, the projection of the air escape groove 21 provided on the first surface 22 along the thickness direction of the magnetic member 20 and the air escape groove 21 provided on the second surface 23 along the The projections of the thickness direction of the magnetic member 20 may overlap. The cross section of the air escape groove 21 along the thickness direction of the magnetic member 20 may be square, semicircular, triangular, or the like.

In the present invention, the roll-shaped laminated structure 100 is prepared by rewinding the magnetic member 20 facing the precursor 13 and the composite layer structure 10 of the composite layer structure 10 and baking at a high temperature, and the magnetic members 20 of adjacent layers are adsorbed, thereby Therefore, the roll-like laminated structure of the present invention has the following advantages: First, the adsorbed magnetic member 20 can support the composite layer structure 10 to complete batch baking in a standing manner, and can prevent the composite layer structure 10 from being caused by air currents. The blowing caused the collapse to become non-circular, thereby increasing productivity and obtaining a flexible film layer 50 with excellent appearance; second, the air escape groove 21 on the magnetic member 20 facilitates the discharge of solvents, thereby preventing material sticking ; Third, after baking, the magnetic member 20 can be separated from the composite layer structure 10, so the magnetic member 20 can be recycled and reused.

In addition, those skilled in the art can also make other changes within the spirit of the present invention. Of course, these changes made according to the spirit of the present invention should all be included in the scope of protection claimed by the present invention.

10: Composite layer structure

11: Metal layer

20: Magnetic parts

43: Third Scroll

50: Flexible film

100: Roll-like laminated structure

Claims (10)

A method for preparing a rolled laminated structure includes the following steps: providing a composite layer structure, the composite layer structure comprising a metal layer and a precursor coated on the metal layer; providing a magnetic member, the magnetic member is provided with An air escape groove; rewind the magnetic member facing the precursor and the composite layer structure to obtain a roll-like laminated structure intermediate, wherein the magnetic members of adjacent layers are adsorbed to support the composite layer structure; baking The roll-shaped laminated structure intermediate is used to cyclize the precursor to form a flexible film layer, thereby obtaining the roll-shaped laminated structure. The method for preparing a roll-shaped laminated structure according to claim 1, wherein the improvement is that the metal layer includes a coating area and a non-coating area located on both sides of the coating area, and the precursor covers the coating area. In the coated area, the magnetic member is rewound onto the non-coated area. The manufacturing method of the roll-like laminated structure according to claim 1, wherein the improvement is that the magnetic member includes a first surface and a second surface that are opposed to each other, and a plurality of connecting the first surface and the second surface. On the side surface, the air escape groove is provided on at least one of the first surface and the second surface and penetrates two opposite side surfaces. The manufacturing method of the roll-like laminated structure according to claim 3, wherein the improvement is that, in the longitudinal direction of the magnetic member, the air escape groove provided on the first surface extends along the thickness direction of the magnetic member. The projection and the air escape groove provided on the second surface are alternately arranged along the projection of the thickness direction of the magnetic member. The method for preparing a roll-like laminated structure according to claim 1, wherein the improvement is that the precursor is a polyamide acid solution or a liquid crystal polymer solution. The method for preparing the roll-shaped laminated structure according to claim 1, wherein the improvement is that, during baking, the roll-shaped laminated structure intermediate body is placed vertically in the oven for baking. A roll-like laminated structure, which is improved by comprising: a composite layer structure including a metal layer and a flexible film layer coated on the metal layer; and A magnetic member is arranged on the composite layer structure facing the flexible film layer, and an air escape groove is opened on the magnetic member; wherein the magnetic members of adjacent layers are adsorbed together to support the composite layer structure. The roll laminate structure according to claim 7, wherein the improvement is that the metal layer includes a coated area and a non-coated area located on both sides of the coated area, and the flexible film layer covers the coated area , The magnetic member is arranged on the non-coated area. The rolled laminated structure according to claim 7, wherein the magnetic member includes a first surface and a second surface that are opposed to each other, and a plurality of side surfaces connecting the first surface and the second surface, so The air escape groove is provided on at least one of the first surface and the second surface and penetrates two opposite side surfaces. The roll laminated structure according to claim 9, wherein the improvement lies in the projection and arrangement of the air escape groove provided on the first surface along the thickness direction of the magnetic member in the longitudinal direction of the magnetic member The air escape grooves on the second surface are alternately arranged at intervals along the projection of the thickness direction of the magnetic member.

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