TWI697409B - Rolled material laminate and method for manufacturing the same - Google Patents

Abstract

A method for manufacturing a rolled material laminate, including steps of: providing a rolled composited layer structure, the composited layer structure includes a metal layer and a precursor solution coated on the metal layer; providing a rolled metal foil, the metal foil includes a rough surface; rolling the composited layer structure and the metal foil into a new roll to obtain a rolled material intermediate; the rough surface of the metal foil abuts onto the precursor solution; and baking the rolled material intermediate to cyclize the rolled material intermediate to form a flexible film layer and obtain the rolled material laminate. The disclosure also relates to a rolled material laminate.

Description

Rolling material laminated body and preparation method thereof

The invention relates to the field of flexible printed circuit boards, and in particular to a roll-coated material laminate and a preparation method thereof.

A flexible metal clad laminate is indispensable in the manufacturing process of a flexible printed circuit board. The flexible metal foil laminate is a laminate of a conductive metal foil (metal foil) and an insulating resin, can be processed into a fine circuit, and can be bent in a narrow space. In the prior art, the insulating resin of the flexible metal foil laminate is usually a polyimide film, usually by directly coating a polyamic acid solution on the metal foil, and then batch-type rolls are loosened. And high-temperature cyclization to form polyimide film on the metal foil. The method of batch-type whole roll relaxation and high-temperature cyclization adopts the standing style.

With the development of thinning of electronic products, the thickness of the metal foil and polyimide film is becoming thinner. In the standing type, the polyimide film is thinner, resulting in insufficient support of the polyimide film. Coupled with the blow of the air flow, the polyimide film easily collapses and becomes a non-circular shape during baking. bad apperance. In addition, the collapsed area is close to each other and prevents the volatilization of the solvent, causing the material to stick. Therefore, the industry uses roll-to-roll high-temperature cyclization instead of standing high-temperature cyclization, but roll-to-roll high-temperature cyclization can only cyclize one roll at a time, thereby reducing production capacity.

In view of this, the present invention provides a covering material laminate with excellent appearance, non-stick and high productivity, and a preparation method thereof.

A method for preparing a roll-coated material laminate, comprising the steps of: providing a roll-shaped coated-layer structure, the coated-layer structure comprising a metal layer and a precursor coated on the metal layer; Provide a roll-shaped metal foil, the metal foil including a rough surface; roll the roll-shaped metal foil and the roll-shaped cladding structure body into a roll to obtain a covered material Intermediate; the rough surface of the metal foil abuts on the precursor; and baking the coated material intermediate so that the precursor is cyclized to form a flexible film layer to obtain a coated material laminate .

Further, the precursor is any one of a polyamide acid solution or a liquid crystal polymer solution.

Further, the metal layer is copper.

Further, the thickness of the metal foil is greater than 36 μm and less than 180 μm.

Further, the baking is completed in nitrogen.

Further, the coating material intermediate is baked by batch baking.

Further, the baking temperature is 200°C-380°C.

A covered material laminate includes a laminate structure, the laminate structure includes a metal layer and a flexible film layer formed on the metal layer; the covered material laminate also includes a The metal foil includes a rough surface, and the rough surface of the metal foil abuts on the flexible film layer and is opposite to the metal layer.

Further, the flexible film layer is any one of a polyimide film layer or a liquid crystal polymer film layer.

Further, the thickness of the metal foil is greater than 36 μm and less than 180 μm.

In the present invention, a metal foil and a cladding layer structure are rolled together and baked at a high temperature to prepare a cladding material laminate, and the rough surface of the metal foil is in contact with the flexible film layer of the cladding layer structure, thereby This makes the covering material laminate of the present invention and the preparation method thereof have the following advantages: First, the stiffness of the metal foil can support the flexible film layer so that it can be batch-baked in a standing manner, and can Prevent the flexible film layer from collapsing and becoming non-circular due to the blow of the air flow, thereby increasing productivity and obtaining the flexible film layer with excellent appearance; second, the rough surface of the metal foil and the flexible film layer The gap between them is conducive to the discharge of solvents, so as to avoid material sticking; third, after baking, the metal foil can be separated from the flexible film layer of the laminated layer structure, therefore, the Metal foil can be recycled and reused.

100: Overlay material laminate

10: Cladding structure

11: Metal layer

12: Flexible film

13: precursor

20: Metal foil

21: rough surface

30: Coiling material intermediate

Fig. 1 is a schematic diagram of a roll-shaped covering material laminate provided by the first embodiment of the present invention.

Fig. 2 is an enlarged schematic view of a small section of the rolled covering material laminate shown in Fig. 1.

Fig. 3A is a schematic diagram of a roll-shaped cladding layer structure provided by the present invention; Fig. 3B is an enlarged schematic view of a small section of the roll-shaped cladding layer structure shown in Fig. 3A.

4A is a schematic diagram of the rolled metal foil provided by the present invention; FIG. 4B is an enlarged schematic view of a small section of the rolled metal foil shown in FIG. 4A.

FIG. 5 is a schematic diagram of a rolled-up layer structure shown in FIG. 3A and a rolled-up metal foil shown in FIG. 4A being rolled together to obtain a rolled-up material intermediate.

In order to further explain the technical means and effects adopted by the present invention to achieve the intended purpose of the invention, the specific implementation and structure of the covering material laminate and the preparation method thereof provided by the present invention are given below in conjunction with the accompanying drawings 1-5 and preferred embodiments. , Features and effects, make the following detailed description. Obviously, so The described embodiments are only a part of the embodiments of the present invention, rather than 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.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the present invention. The terminology used in the specification of the present invention herein is only for the purpose of describing specific embodiments, and is not intended to limit the present invention. The term "and/or" as used herein includes any and all combinations of one or more related listed items.

Please refer to FIGS. 1-2, a preferred embodiment of the present invention provides a rolled material laminate 100. Wherein, the covering material laminate 100 is in a roll shape. The covered material laminate 100 includes a covered layer structure 10 and a metal foil 20 abutting on the covered layer structure 10.

The cladding layer structure 10 is flexible and includes a metal layer 11 and a flexible film layer 12 formed on the metal layer 11.

In this embodiment, the flexible film layer 12 is a polyimide (PI) film layer. In other embodiments, the flexible film layer 12 may also be a liquid crystal polymer (LCP) film layer or the like.

Preferably, the clad layer structure 10 is a single-sided copper clad laminate, that is, the metal layer 11 is a copper layer.

Wherein, the glass transition temperature and linear thermal expansion coefficient of the flexible film layer 12 can be determined according to actual conditions.

Wherein, the metal foil 20 includes a rough surface 21. The rough surface 21 of the metal foil 20 abuts on the flexible film layer 12 and is opposite to the metal layer 11. Wherein, the metal foil 20 has stiffness, so that it can support the flexible film layer 12 so that it can complete batch baking in a standing manner. The gap between the rough surface 21 of the metal foil 20 and the flexible film layer 12 facilitates the discharge of solvents, thereby avoiding material sticking.

Wherein, after baking, the metal foil 20 in the covered material laminate 100 can be separated from the flexible film layer 12 of the covered layer structure 10, so the metal foil 20 can be recycled Reuse.

Wherein, the thickness of the metal foil 20 is greater than 36 μm and less than 180 μm. The thickness of the metal foil 20 can be determined according to actual conditions.

Please refer to FIGS. 3-5. The present invention also provides a method for preparing the laminated body 100 of the covered material, including the steps: the first step, please refer to FIGS. 3A-3B, to provide a laminated structure 10 in a roll shape.

Wherein, the cladding layer structure 10 includes a metal layer 11 and a precursor 13 coated on the metal layer 11. Wherein, the precursor 13 forms the flexible film layer 12 after curing.

In this embodiment, the precursor 13 is a polyamide acid solution, and the metal layer 11 is a copper layer.

In other embodiments, the precursor 13 may also be a liquid crystal polymer solution or the like.

In the second step, referring to FIGS. 4A-4B, a metal foil 20 in a roll shape is provided. Wherein, the metal foil 20 includes a rough surface 21.

Wherein, the thickness of the metal foil 20 is greater than 36 μm and less than 180 μm.

In the third step, referring to FIG. 5, the roll-shaped metal foil 20 and the roll-shaped laminated layer structure 10 are rolled into a roll to obtain a rolled material intermediate 30. Wherein, the rough surface 21 of the metal foil 20 abuts on the precursor 13.

The fourth step, referring to Figure 1-2, put the roll-shaped covering material intermediate 30 into the baking box for baking, so that the precursor 13 is cyclized at high temperature to form the flexible film layer 12 to obtain the covering Roll material laminate 100.

Wherein, the baking is completed in nitrogen.

Wherein, the coating material intermediate 30 is baked by batch baking.

Among them, the baking temperature range is: 200°C-380°C.

Wherein, the preparation method of the laminated body of the covering material is suitable for, but not limited to, the production of a thin polyimide copper clad laminate and the production of a thin liquid crystal polymer copper clad laminate.

In the present invention, the metal foil 20 and the cladding layer structure 10 are rolled together and baked at a high temperature to prepare the cladding material laminate 100, and make the rough surface 21 of the metal foil 20 and the cladding layer structure 10 flexible The film layer 12 is in contact with each other, so that the covering material laminate 100 and the preparation method thereof of the present invention have the following advantages: First, the stiffness of the metal foil 20 can support the flexible film layer 12 so that it can stand The batch baking is completed in a simple manner, and the flexible film layer 12 can be prevented from collapsing and becoming non-circular due to the blowing of the airflow, thereby increasing the productivity and obtaining the flexible film layer 12 with excellent appearance; second, the metal The gap between the rough surface 21 of the foil 20 and the flexible film layer 12 facilitates the discharge of solvents, thereby avoiding material sticking; third, after baking, the metal foil 20 can be connected to the coating The flexible film layer 12 of the laminated structure 10 is separated, and therefore, the metal foil 20 can be recycled and reused.

The above are only the preferred embodiments of the present invention, and do not limit the present invention in any form. Although the present invention has been disclosed as the preferred embodiments, it is not intended to limit the present invention. Anyone familiar with the profession , Without departing from the scope of the technical solution of the present invention, when the technical content disclosed above can be used to make some changes or modification into equivalent implementations with equivalent changes, but all that does not deviate from the technical solution of the present invention, according to the technical essence of the present invention Any simple modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the technical solutions of the present invention.

10: Cladding structure

20: Metal foil

30: Coiling material intermediate

Claims (10)

A method for preparing a roll-coated material laminate, comprising the steps of: providing a roll-shaped coated-layer structure, the coated-layer structure comprising a metal layer and a precursor coated on the metal layer; Provide a roll-shaped metal foil, the metal foil including a rough surface; roll the roll-shaped metal foil and the roll-shaped laminated structure body into a roll to obtain a covered material An intermediate body, wherein the rough surface of the metal foil abuts on the precursor; and baking the covering material intermediate so that the precursor is cyclized to form a flexible film layer to obtain a covering material laminate . The method for preparing a roll-over material laminate according to claim 1, wherein the precursor is any one of a polyamide acid solution or a liquid crystal polymer solution. The method for producing a laminated body of a covering material according to claim 1, wherein the metal layer is copper. The method for producing a laminated body of a covered material according to claim 1, wherein the thickness of the metal foil is greater than 36 μm and less than 180 μm. The method for producing a laminated body of a covering material according to claim 1, wherein the baking is completed in nitrogen. The method for preparing a coating material laminate according to claim 1, wherein the coating material intermediate is baked in a batch type baking method. The method for preparing a laminated body of a covering material according to claim 1, wherein the baking temperature is 200°C to 380°C. A covered material laminate, comprising a covered layer structure, the covered layer structure comprising a metal layer and a flexible film layer formed on the metal layer; wherein the covered material layer The laminated body further includes a metal foil, the metal foil includes a rough surface, and the rough surface of the metal foil abuts on the flexible film layer and is opposite to the metal layer. The covering material laminate according to claim 8, wherein the flexible film layer is any one of a polyimide film layer or a liquid crystal polymer film layer. The coated material laminate according to claim 8, wherein the thickness of the metal foil is greater than 36 μm and less than 180 μm.

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