Method for manufacturing a laminate with one metal-plated side

A technology of metal coating layer and manufacturing method, which is applied in the direction of metal layered products, printed circuit manufacturing, chemical instruments and methods, etc., can solve the problems of rapid deterioration of protective materials, gaps between layers, and increased manufacturing costs, so as to improve industrial Excellent production efficiency, excellent interlayer adhesion, and excellent reliability

Active Publication Date: 2014-08-13
NIPPON STEEL CHEM &MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has disadvantages in that the protective material deteriorates quickly because the protective material is in direct contact with the heated and pressurized surface, and the manufacturing cost increases because the number of reuses of the protective material decreases.
In addition, as in the case of Patent Document 1, in the case of using a thin thermoplastic polymer film or a thin adherend, there is a possibility that unbonded portions and weakly bonded portions may be formed, and interlayer voids and wrinkles may be generated in addition.

Method used

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  • Method for manufacturing a laminate with one metal-plated side
  • Method for manufacturing a laminate with one metal-plated side
  • Method for manufacturing a laminate with one metal-plated side

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] As the insulating film (A), prepare a liquid crystal polymer film 1 (melting point 320° C.) with a thickness of 50 μm and a width of 70 mm rolled into a roll-shaped long film. Commercially available electrolytic copper foil 2 (surface roughness Rz: insulating film lamination surface 1.6 μm, exposed surface 1.4 μm) was rolled into a roll-shaped long copper foil, and an aluminum foil with a thickness of 50 μm and a width of 70 mm was prepared as a separator (C). 3 (front and back surface roughness Rz: both 1.2 μm) was rolled into a roll-shaped long aluminum foil. put these as figure 1 As shown, they are respectively installed on the insulating film conveying roller A, the metal foil conveying roller B, and the spacer film conveying roller C, on a pair of pressure rollers 4 (r 1 、r 2 ), are supplied so as to overlap in the order of "electrodeposited copper foil 2 / liquid crystal polymer film 1 / aluminum foil 3 / liquid crystal polymer film 1 / electrodeposited copper foil 2" (...

Embodiment 2

[0066] A non-thermoplastic commercially available heat-resistant polyimide film 3 (Tg: 340° C., surface roughness of both front and back: 0.9 μm) with a thickness of 50 μm was used as the separator (C), and the In Example 1, a single-sided copper-clad laminate according to Example 2 was obtained in the same manner.

[0067] In this Example 2, the delamination of the liquid crystal polymer film 1 and the heat-resistant polyimide film 3 after thermocompression bonding was not defective and proceeded very smoothly. As a result, no cracks, wrinkles, or surface roughness were observed on the front and back surfaces of the copper laminate 5 . In addition, in the measurement using the peelability test piece, 0.07 kN / m of interface peeling was confirmed. In addition, in the evaluation using the adhesion test piece, the [adhesion] was good, and the [unevenness in adhesion] was 0.02 kN / m, and it was confirmed that the liquid crystal polymer 1 and the electrodeposited copper foil 2 were...

Embodiment 3

[0069] As the spacer film (C), a double-sided copper-clad laminate (manufactured by Nippon Steel Chemical Co., Ltd., Espanex M series (MB12-25-12CEG)) was used, and the film related to Example 3 was obtained in the same manner as in Example 1. Copper clad laminate on one side. This double-sided copper-clad laminate has a polyimide resin with a thickness of 25 μm as an insulating layer in the center, and copper foils with a thickness of 12 μm are provided on both sides, and the surface roughness (Rz) of the exposed surfaces of the copper foils is 1.0. μm.

[0070] In the production of Example 3, the interlayer delamination between the liquid crystal polymer film 1 and the heat-resistant polyimide film 3 after thermocompression bonding was not defective and proceeded very smoothly. As a result of covering the front and back surfaces of the copper laminate 5 , no cracks, wrinkles, or surface roughness were observed at all. In addition, in the measurement using the peelability t...

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Abstract

Provided is a high-productivity method for industrial manufacture of a laminate with one metal-plated side. Said method results in excellent interlayer adhesion between an insulating film and a metal foil, with no variations in adhesive strength. The provided method also inhibits the formation of aesthetic defects such as wrinkles. The provided method, which manufactures a laminate in which a metal foil (B) is bonded to an insulating film (A) that has an adhesive surface comprising a thermoplastic resin, uses a divider film (C), both sides of which have a surface roughness (Rz) of at most 2.0 µm. Insulating films (A), metal foils (B), and the divider film (C) are layered between a pair of pressure rollers (r1 and r2) in the order r1, B, A, C, A, B, r2 and bonded via thermocompression bonding. Two laminates, each with one metal-plated side, can then be separated from the divider film (C).

Description

technical field [0001] The present invention relates to a method for producing a single-sided metal-clad laminate in which a metal foil is bonded to an insulating film having an adhesive surface made of a thermoplastic resin. Background technique [0002] With the miniaturization, weight reduction, and high functionality of electronic equipment in recent years, the use of flexible circuit boards has increased, and it is preferably used on insulating films such as polyimide films and liquid crystal polymer films with thermoplastic surfaces. A metal-clad laminate having a metal foil bonded by thermocompression. As a method for producing a laminate having such a structure, a method of continuously performing thermocompression bonding by conveying an insulating film and a metal foil in a roll-to-roll manner, passing between a pair of pressure rolls while heating is generally employed. [0003] For example, Patent Document 1 proposes a method in which a metal foil is thermally p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B15/08B32B37/10H05K3/00
CPCB32B37/0015B32B2309/02B32B2457/08H05K3/022B32B15/08H05K2201/0141H05K2203/1536B32B2311/00B32B37/226B32B37/025B32B2309/105B32B2309/04B32B7/12B32B15/20B32B27/16B32B27/281B32B2307/538B32B2307/546B32B2307/732
Inventor 荒井昭平冈崎有起
Owner NIPPON STEEL CHEM &MATERIAL CO LTD
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