WO2017130947A1 - 樹脂付き金属箔、フレキシブルプリント配線板 - Google Patents
樹脂付き金属箔、フレキシブルプリント配線板 Download PDFInfo
- Publication number
- WO2017130947A1 WO2017130947A1 PCT/JP2017/002297 JP2017002297W WO2017130947A1 WO 2017130947 A1 WO2017130947 A1 WO 2017130947A1 JP 2017002297 W JP2017002297 W JP 2017002297W WO 2017130947 A1 WO2017130947 A1 WO 2017130947A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- resin
- metal foil
- layer
- insulating layer
- resin layer
- Prior art date
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/202—Conductive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/206—Insulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/306—Resistant to heat
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/406—Bright, glossy, shiny surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/51—Elastic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/546—Flexural strength; Flexion stiffness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/732—Dimensional properties
- B32B2307/734—Dimensional stability
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
- B32B2457/08—PCBs, i.e. printed circuit boards
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/03—Use of materials for the substrate
- H05K1/0313—Organic insulating material
- H05K1/0353—Organic insulating material consisting of two or more materials, e.g. two or more polymers, polymer + filler, + reinforcement
- H05K1/0373—Organic insulating material consisting of two or more materials, e.g. two or more polymers, polymer + filler, + reinforcement containing additives, e.g. fillers
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/01—Dielectrics
- H05K2201/0137—Materials
- H05K2201/0141—Liquid crystal polymer [LCP]
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/01—Dielectrics
- H05K2201/0137—Materials
- H05K2201/015—Fluoropolymer, e.g. polytetrafluoroethylene [PTFE]
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/01—Dielectrics
- H05K2201/0137—Materials
- H05K2201/0154—Polyimide
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/01—Dielectrics
- H05K2201/0137—Materials
- H05K2201/0158—Polyalkene or polyolefin, e.g. polyethylene [PE], polypropylene [PP]
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/01—Dielectrics
- H05K2201/0183—Dielectric layers
- H05K2201/0195—Dielectric or adhesive layers comprising a plurality of layers, e.g. in a multilayer structure
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/02—Fillers; Particles; Fibers; Reinforcement materials
- H05K2201/0203—Fillers and particles
- H05K2201/0206—Materials
- H05K2201/0209—Inorganic, non-metallic particles
Definitions
- the present invention relates to a metal foil with resin and a flexible printed wiring board, and more particularly to a metal foil with resin used for manufacturing a printed wiring board such as a flexible printed wiring board and a flexible printed wiring board used for various electronic devices.
- a film adhesive having a hole corresponding to the hole of the perforated board is sandwiched between the perforated board and the printed board on which the copper pattern is formed, and heated and pressed.
- a manufacturing method for laminating and forming is known (for example, see Patent Document 2). In this manufacturing method, a thermoplastic resin sheet is placed on a perforated substrate and heated and pressed to perform lamination molding so that the adhesive does not protrude into the holes.
- a metal foil with a perforated resin instead of the perforated board and the film adhesive.
- a resin of a metal foil with a perforated resin is stacked on a printed circuit board, a thermoplastic resin sheet is placed on the metal foil of a metal foil with a perforated resin, and is laminated by heating and pressing.
- the thermoplastic resin sheet is thermally deformed and fills the holes at the time of molding, the resin of the metal foil with a perforated resin can be prevented from protruding into the holes.
- the surface of the printed circuit board is uneven with a copper pattern formed, when using a thermoplastic resin sheet to heat and press, the surface of the printed circuit board has a perforated resin-coated metal foil metal foil. May appear as irregularities on the surface. When the surface of the metal foil becomes uneven as described above and the smoothness thereof is impaired, it becomes difficult to mount components at this location with high density.
- An object of the present invention is to provide a resin-coated metal foil and flexible printed wiring that can suppress sticking, while maintaining good adhesion, flexibility, heat resistance, and circuit filling properties, and having low resin fluidity during molding. Is to provide a board.
- a metal foil with resin in which a first insulating layer and a second insulating layer are formed in this order on a metal foil,
- the first insulating layer is formed of a polyimide resin layer, a polyamideimide resin layer, a liquid crystal polymer resin layer, a fluororesin layer or a polyphenylene ether resin layer
- the second insulating layer is formed of a semi-cured polyolefin resin layer
- the polyolefin resin layer contains a component (A) polyolefin elastomer and a component (B) thermosetting resin,
- the proportion of the component (A) polyolefin-based elastomer in the entire polyolefin resin layer is 50 to 95% by mass.
- FIG. 1A to 1F are schematic cross-sectional views showing a plurality of examples of a resin-coated metal foil according to an embodiment of the present invention.
- FIG. 2 is a schematic sectional view showing the flexible printed wiring board according to the embodiment of the present invention.
- FIG. 3 is a schematic cross-sectional view showing the manufacturing process of the flexible printed wiring board according to the embodiment of the present invention.
- the metal foil 30 with resin of this embodiment will be described.
- the metal foil 30 with resin can be used as a material for the flexible printed wiring board 40 described later.
- 1A to 1F show specific examples of the metal foil 30 with resin.
- the first insulating layer 21 and the second insulating layer 22 are formed in this order on the metal foil 50.
- the first insulating layer 21 is formed of a polyimide resin layer 9, a polyamideimide resin layer 8, a liquid crystal polymer resin layer 4, a fluororesin layer 5, or a polyphenylene ether resin layer 6.
- the first insulating layer 21 can include at least one of a thermosetting resin and a thermoplastic resin.
- the first insulating layer 21 is formed of a polyimide resin layer 9.
- the polyimide resin layer 9 is formed of a polyimide resin composition containing a polyimide resin as a main component.
- This polyimide resin composition may contain, for example, a polyetherimide resin or a polyethersulfone resin.
- the first insulating layer 21 is formed of the polyamideimide resin layer 8.
- the polyamideimide resin layer 8 is formed of a polyamideimide resin composition containing a polyamideimide resin as a main component.
- This polyamideimide resin composition may contain, for example, a polyetherimide resin or a polyethersulfone resin.
- the first insulating layer 21 is formed of the liquid crystal polymer resin layer 4.
- the liquid crystal polymer resin layer 4 is formed of a liquid crystal polymer resin composition containing a liquid crystal polymer resin as a main component.
- the liquid crystal polymer resin has a structure in which parahydroxybenzoic acid and various components (for example, 6-hydroxy-2-naphthoic acid) are ester-linked in a straight chain.
- the first insulating layer 21 is formed of the fluororesin layer 5.
- the fluororesin layer 5 is formed of a fluororesin composition containing a fluororesin as a main component.
- the fluororesin is a synthetic resin obtained by polymerizing an olefin containing fluorine. Specific examples of the fluororesin include polytetrafluoroethylene.
- the first insulating layer 21 is formed of a polyphenylene ether resin layer 6.
- the polyphenylene ether resin layer 6 is formed of a polyphenylene ether resin composition containing a polyphenylene ether resin as a main component.
- the polyphenylene ether resin is a polymer of 2,6-dimethylphenylene oxide.
- the polyphenylene ether resin includes a modified polyphenylene ether resin.
- the modified polyphenylene ether resin is a polymer alloy of a polyphenylene ether resin and another resin such as a polystyrene resin.
- the modified polyphenylene ether resin is excellent in molding fluidity.
- the first insulating layer 21 is composed of a coating layer 211 and a film layer 212.
- Each of the coating layer 211 and the film layer 212 is formed of a polyimide resin layer 9, a polyamideimide resin layer 8, a liquid crystal polymer resin layer 4, a fluororesin layer 5, or a polyphenylene ether resin layer 6. That is, the first insulating layer 21 of the resin-coated metal foil 30 shown in FIG. 1F is from the group consisting of the polyimide resin layer 9, the polyamideimide resin layer 8, the liquid crystal polymer resin layer 4, the fluororesin layer 5, and the polyphenylene ether resin layer 6. It is formed of two selected layers. The two layers of the coating layer 211 and the film layer 212 constituting the first insulating layer 21 may be the same resin layer or different resin layers.
- the first insulating layer 21 is particularly composed of the polyimide resin layer 9, the polyamideimide resin layer 8, the liquid crystal polymer resin layer 4, the fluororesin layer 5 or the polyphenylene ether resin layer 6.
- the first insulating layer 21 may include at least one of a thermosetting resin and a thermoplastic resin, and may be in a cured state, a semi-cured state, or a solidified state.
- the second insulating layer 22 is formed of a semi-cured polyolefin resin layer 3.
- the semi-cured state is a state of an intermediate stage of the curing reaction, and the intermediate stage is a stage between the A stage which is a varnish state and the C stage which is cured.
- the semi-cured polyolefin resin layer 3 is cured to an extent that is not sticky at room temperature. When further heated, the polyolefin resin layer 3 is once melted and then completely cured to form a C-stage polyolefin resin layer 3.
- the polyolefin resin layer 3 is formed of a polyolefin resin composition containing a polyolefin resin as a main component.
- the polyolefin resin layer 3 contains the component (A) polyolefin elastomer and the component (B) thermosetting resin, and the proportion of the component (A) polyolefin elastomer in the entire polyolefin resin layer 3 is 50 to 95% by mass. is there.
- the polyolefin resin layer 3 contains much component (A) polyolefin-type elastomer, the fluidity
- the flexibility of the resin-coated metal foil 30 and the flexible printed wiring board 40 manufactured using the same is increased, and the flexibility is further improved.
- the proportion of the component (A) polyolefin elastomer in the entire polyolefin resin layer 3 is less than 50% by mass, the flexibility cannot be sufficiently improved.
- the component (A) polyolefin-based elastomer has a large coefficient of thermal expansion, if the proportion of the component (A) polyolefin-based elastomer in the entire polyolefin resin layer 3 exceeds 95% by mass, the dimensional change during molding increases, The warp of the subsequent flexible printed wiring board 40 increases.
- Polyolefin elastomer is polystyrene-poly (ethylene / propylene) block-polystyrene copolymer, polystyrene-poly (ethylene-ethylene / propylene) block-polystyrene copolymer, polystyrene-poly (ethylene / butylene) block.
- polystyrene-polyisoprene block copolymer polystyrene-polyisoprene block copolymer, hydrogenated polystyrene-polyisoprene-polybutadiene block copolymer, polystyrene-poly (butadiene / butylene) block-polystyrene copolymer, ethylene-glycidyl methacrylate copolymer
- thermosetting resin is preferably one or more selected from the group consisting of epoxy resins, phenol resins, bismaleimide resins, and polyphenylene ether oligomers having vinyl groups at both ends.
- epoxy resin include a dicyclopentadiene type epoxy resin.
- the polyolefin resin layer 3 can further contain a component (C) curing accelerator.
- C component (C) curing accelerator.
- the curing accelerator include 2-ethyl-4-methylimidazole.
- the polyolefin resin layer 3 can further contain a component (D) filler.
- a component (D) filler is silica.
- the polyolefin resin layer 3 preferably has a storage elastic modulus of 10 5 to 10 8 Pa at 25 ° C. to 150 ° C. after being treated at 180 ° C. for 60 minutes. Thereby, the thermal shock resistance of the flexible printed wiring board 40 can be improved, and the solder heat resistance during reflow can be further increased.
- 1A to 1E can be manufactured as follows, for example.
- a liquid polyimide resin composition, a liquid polyamideimide resin composition, a liquid liquid crystal polymer resin composition, a liquid fluororesin composition or a liquid polyphenylene ether resin composition is applied to the surface of a metal foil 50 such as a copper foil.
- the first insulating layer 21 composed of the polyimide resin layer 9, the polyamideimide resin layer 8, the liquid crystal polymer resin layer 4, the fluororesin layer 5, or the polyphenylene ether resin layer 6 is formed by coating and drying.
- a liquid polyolefin resin composition is applied to the surface of the first insulating layer 21 and then dried by heating to form the second insulating layer 22 composed of the polyolefin resin layer 3.
- the resin-coated metal foil 30 shown in FIGS. 1A to 1E can be manufactured.
- the first insulating layer 21 is in a cured state, a semi-cured state, or a solidified state, and the second insulating layer 22 is in a semi-cured state.
- the metal foil with resin 30 shown in FIGS. 1A to 1E can be manufactured as follows.
- a polyimide film, a polyamideimide film, a liquid crystal polymer film, a fluororesin film, or a polyphenylene ether film is pressure-bonded as a film-like material on the surface of a metal foil 50 such as a copper foil to obtain a polyimide resin layer 9 and a polyamideimide resin layer 8. Then, the first insulating layer 21 composed of the liquid crystal polymer resin layer 4, the fluororesin layer 5 or the polyphenylene ether resin layer 6 is formed.
- a liquid polyolefin resin composition is applied to the surface of the first insulating layer 21 and then dried by heating to form the second insulating layer 22 composed of the polyolefin resin layer 3.
- the resin-coated metal foil 30 shown in FIGS. 1A to 1E can be manufactured.
- the first insulating layer 21 is in a cured state, a semi-cured state, or a solidified state, and the second insulating layer 22 is in a semi-cured state.
- 1F can be manufactured as follows, for example.
- a liquid polyimide resin composition, a liquid polyamideimide resin composition, a liquid liquid crystal polymer resin composition, a liquid fluororesin composition or a liquid polyphenylene ether resin composition is applied to the surface of the metal foil 50 such as copper foil. To form a coating layer 211.
- a polyimide film, a polyamideimide film, a liquid crystal polymer film, a fluororesin film, or a polyphenylene ether film is laminated on the surface of the coating layer 211 to form a film layer 212.
- the resin-coated metal foil 30 shown in FIG. 1F can be manufactured.
- the first insulating layer 21 composed of the coating layer 211 and the film layer 212 is composed of the polyimide resin layer 9, the polyamideimide resin layer 8, the liquid crystal polymer resin layer 4, the fluororesin layer 5 or the polyphenylene.
- the ether resin layer 6 and the second insulating layer 22 are the semi-cured polyolefin resin layer 3.
- the first insulating layer 21 may be cured, semi-cured, or solidified.
- the flexible printed wiring board 40 of this embodiment includes the cured product or solidified product of the first insulating layer 21 and the cured product of the second insulating layer 22 of the metal foil 30 with resin described above as the insulating layer 2.
- FIG. 2 shows a specific example of the flexible printed wiring board 40.
- a flexible printed wiring board 40 shown in FIG. 2 includes an insulating film 7, a conductor layer 1, an insulating layer 2, a metal foil 50, and a non-through hole 13.
- the flexible printed wiring board 40 includes a flex-rigid printed wiring board.
- Examples of the insulating film 7 include a polyimide film, a polyamideimide film, a liquid crystal polymer film, a fluororesin film, and a polyphenylene ether film.
- the conductor layer 1 is formed in a predetermined pattern on the surface of the insulating film 7.
- the conductor layer 1 is composed of an internal circuit 11 that exists in the insulating layer 2 and an external circuit 12 that exists outside the insulating layer 2.
- the insulating layer 2 is formed on the surface of the insulating film 7.
- the insulating layer 2 is formed of a cured product or solidified product of the first insulating layer 21 and a cured product of the second insulating layer 22 of the metal foil 30 with resin described above.
- the metal foil 50 is formed on the surface of the insulating layer 2.
- This metal foil 50 is formed of the metal foil 50 of the metal foil 30 with resin described above. An unnecessary portion of the metal foil 50 may be removed by etching or the like to form a circuit on the surface of the insulating layer 2.
- the non-through hole 13 is a hole that penetrates the insulating layer 2 and the metal foil 50 and does not penetrate the insulating film 7.
- the surface of the insulating film 7 is exposed on the bottom surface of the non-through hole 13, and the external circuit 12 is formed on this surface.
- the flexible printed wiring board 40 shown in FIG. 2 can be manufactured as follows, for example.
- the insulating film 7 having the conductor layer 1 formed on the surface and the resin-added metal foil 30 having the through holes 14 are prepared.
- the second insulating layer 22 of the resin-coated metal foil 30 is stacked on the surface of the insulating film 7 and laminated by heating and pressing.
- the flexible printed wiring board 40 shown in FIG. 2 can be manufactured.
- the polyolefin resin composition hardly flows from the second insulating layer 22 during molding, and protrudes into the non-through hole 13 to be external circuit 12. And the like can be suppressed. Moreover, the above-mentioned polyolefin resin composition does not flow at the time of molding, and has fluidity as long as it does not protrude into the non-through-holes 13, so that the circuit filling property is good. That is, at the time of molding, the polyolefin resin composition can fill the gaps between the internal circuits 11 and 11 and level the unevenness of the surface of the insulating film 7.
- the surface of the metal foil 50 of the metal foil 30 with resin is not pressed with a cushion material such as a thermoplastic resin sheet described in Patent Document 2, but is pressed with a mirror plate. Therefore, the smoothness of the surface of the metal foil 50 can be ensured after molding. Moreover, in the flexible printed wiring board 40 obtained as described above, since the metal foil 50 is firmly bonded to the insulating film 7 by the insulating layer 2, the adhesion of the metal foil 50 to the insulating film 7 is good. is there. As described above, when the flexible printed wiring board 40 is manufactured, if the metal foil with resin 30 of the present embodiment is used as a material, the adhesiveness, flexibility, heat resistance, and circuit fillability are maintained well. The fluidity of the resin (particularly the polyolefin resin composition) at the time of molding is low, and protrusion can be suppressed.
- the resin-attached metal foil (30) includes the first insulating layer (21) and the second insulating layer (22) on the metal foil (50). Is a metal foil with resin (30) formed in this order.
- the first insulating layer (21) is formed of a polyimide resin layer (9), a polyamideimide resin layer (8), a liquid crystal polymer resin layer (4), a fluororesin layer (5), or a polyphenylene ether resin layer (6). ing.
- the second insulating layer (22) is formed of a semi-cured polyolefin resin layer (3).
- the polyolefin resin layer (3) includes a component (A) a polyolefin-based elastomer and a component (B) a thermosetting resin.
- the proportion of the component (A) polyolefin elastomer in the entire polyolefin resin layer (3) is 50 to 95% by mass.
- the fluidity of the resin at the time of molding is low and the protrusion can be suppressed while maintaining good adhesion, flexibility, heat resistance and circuit fillability.
- the component (A) polyolefin elastomer is a polystyrene-poly (ethylene / propylene) block-polystyrene copolymer, polystyrene-poly (ethylene-ethylene).
- the component (B) thermosetting resin is composed of an epoxy resin, a phenol resin, a bismaleimide resin, and a polyphenylene ether oligomer having vinyl groups at both ends. 1 type or 2 types or more selected from more.
- the polyolefin resin layer (3) further contains a component (C) curing accelerator.
- the polyolefin resin layer (3) further includes a component (D) filler.
- the polyolefin resin layer (3) has a storage elastic modulus of 10 5 to 10 at 25 ° C. to 150 ° C. after being treated at 180 ° C. for 60 minutes. is 8 Pa.
- the thermal shock resistance of the flexible printed wiring board (40) can be increased, and the solder heat resistance during reflow can be further increased.
- mode which concerns on this invention is the insulating layer (2) in the hardened
- the fluidity of the resin at the time of molding is low and protrusion can be suppressed while maintaining good adhesion, flexibility, heat resistance, and circuit filling properties.
- Example 1 is composed of eleven types of examples from Example 1- (1) to Example 1- (11). These embodiments are the same except that only the second insulating layer is different.
- R-F552 manufactured by Panasonic Corporation (a two-layer casting flexible copper-clad laminate manufactured by applying a liquid polyimide resin composition to the surface of a copper foil and drying it by heating. In which the thickness of the cured polyimide resin layer is 12.5 ⁇ m) was prepared.
- a polyolefin resin composition having the resin compositions (1) to (11) shown in Table 3 is applied to the surface of the polyimide resin layer, and this is heated and dried to obtain a semi-cured polyolefin resin having a thickness of 50 ⁇ m. A layer was formed. Thus, the metal foil with resin in which the first insulating layer (cured polyimide resin layer) and the second insulating layer (semi-cured polyolefin resin layer) are formed in this order on the metal foil (copper foil) is obtained. It was.
- Table 4 shows specific manufacturer names and product names of the components (A) to (D) constituting the polyolefin resin compositions (1) to (11) shown in Table 3.
- the second embodiment is composed of eleven types of embodiments from the embodiment 2- (1) to the embodiment 2- (11). These embodiments are the same except that only the second insulating layer is different.
- a liquid polyamideimide resin composition was applied to the surface of a copper foil having a thickness of 12 ⁇ m, and this was heated and dried to form a cured polyamideimide resin layer having a thickness of 12.5 ⁇ m.
- a liquid polyamideimide resin composition was prepared as follows. 192 g of trimellitic anhydride (manufactured by Nacalai Tesque), 211 g of 4,4′-diisocyanato-3,3′-dimethylbiphenyl, 35 g of tolylene 2,4-diisocyanate, 1 g of diazabicycloundecene (manufactured by San Apro) , And 2482 g of N, N-dimethylacetamide (DMAC, manufactured by Nacalai Tesque Co., Ltd.), the polymer concentration was adjusted to 15% by mass, and the resulting mixture was heated to 100 ° C. over 1 hour.
- trimellitic anhydride manufactured by Nacalai Tesque
- DMAC N-dimethylacetamide
- a polyolefin resin composition having the resin compositions (1) to (11) shown in Table 3 was applied to the surface of the polyamideimide resin layer, and this was heated and dried to obtain a semi-cured state having a thickness of 50 ⁇ m. A polyolefin resin layer was formed.
- Table 4 shows specific manufacturer names and product names of the components (A) to (D) constituting the polyolefin resin compositions (1) to (11) shown in Table 3.
- Example 1 Comparative Example 1 In Example 1, an epoxy resin layer was formed instead of the polyolefin resin layer. The other contents were the same as in Example 1.
- the resin composition of the epoxy resin composition for forming the epoxy resin layer is shown in (3) of Table 3.
- Table 4 shows specific manufacturer names and trade names of the components (E) to (I) constituting the epoxy resin composition.
- the carbodiimide-modified polyamide in the above resin composition was synthesized using a carbodiimide compound after first synthesizing a carbodiimide compound as follows.
- the carbodiimide-modified polyamide had a glass transition temperature (Tg) of 120 ° C., a 5% weight loss temperature of 320 ° C., and a solution viscosity of 860 mPa ⁇ s.
- Example 2 In Example 1, an epoxy resin layer was formed instead of the polyolefin resin layer. The other contents were the same as in Example 1.
- the resin composition of the epoxy resin composition for forming the epoxy resin layer is shown in (3) of Table 3.
- Table 4 shows specific manufacturer names and trade names of the components (E) to (I) constituting the epoxy resin composition.
- the carbodiimide-modified polyamide in the above resin composition was synthesized by the same method as in Comparative Example 1.
- a flexible printed wiring board having a MIT pattern circuit formed of an electrolytic copper foil having a thickness of 18 ⁇ m on one surface of a polyimide film having a thickness of 25 ⁇ m was prepared.
- a second insulating layer of metal foil with resin is laminated on both sides of this flexible printed wiring board and bonded together by heating and pressing at 180 ° C. for 1 hour, and then the metal foil of metal foil with resin on both sides is removed by full etching.
- Circuit fillability A flexible printed wiring board having a comb-shaped circuit formed of rolled copper foil having a thickness of 35 ⁇ m is prepared, and a second insulating layer of a metal foil with resin is laminated and bonded to the circuit forming surface of the flexible printed wiring board. A sample was prepared by heating and pressing for 1 hour. The circuit filling property was evaluated by visually observing the cross section of this sample. A circuit filled with resin between the circuits was defined as “pass”, and the other circuit was defined as “fail”. The evaluation results are shown in Tables 1 and 2.
- each example has good adhesion (copper foil peel strength), flexibility and heat resistance (solder heat resistance), and the resin is less likely to flow. Nevertheless, it was confirmed that the circuit filling property was excellent.
- each comparative example had good adhesion, flexibility, heat resistance, and circuit fillability, but the resin was easy to flow.
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Abstract
Description
金属箔に第1絶縁層及び第2絶縁層がこの順に形成された樹脂付き金属箔であって、
前記第1絶縁層は、ポリイミド樹脂層、ポリアミドイミド樹脂層、液晶ポリマー樹脂層、フッ素樹脂層又はポリフェニレンエーテル樹脂層で形成され、
前記第2絶縁層は、半硬化状態のポリオレフィン樹脂層で形成されていると共に、
前記ポリオレフィン樹脂層が、成分(A)ポリオレフィン系エラストマーと、成分(B)熱硬化性樹脂とを含み、
前記ポリオレフィン樹脂層全体に占める前記成分(A)ポリオレフィン系エラストマーの割合が50~95質量%である。
本実施形態の樹脂付き金属箔30について説明する。樹脂付き金属箔30は、後述のフレキシブルプリント配線板40の材料として用いることができる。図1A~図1Fに樹脂付き金属箔30の具体例を示す。樹脂付き金属箔30は、金属箔50に第1絶縁層21及び第2絶縁層22がこの順に形成されている。
本実施形態のフレキシブルプリント配線板40について説明する。フレキシブルプリント配線板40は、上述の樹脂付き金属箔30の第1絶縁層21の硬化物又は固化物と、第2絶縁層22の硬化物とを、絶縁層2として有している。図2にフレキシブルプリント配線板40の具体例を示す。図2に示すフレキシブルプリント配線板40は、絶縁フィルム7と、導体層1と、絶縁層2と、金属箔50と、非貫通孔13とを備えている。なお、フレキシブルプリント配線板40には、フレックスリジッドプリント配線板も含まれる。
実施例1は、実施例1-(1)~実施例1-(11)の11種類の実施例で構成される。これらの実施例は、第2絶縁層のみが異なるだけで、その他は同じである。
実施例2は、実施例2-(1)~実施例2-(11)の11種類の実施例で構成される。これらの実施例は、第2絶縁層のみが異なるだけで、その他は同じである。
実施例1において、ポリオレフィン樹脂層の代わりにエポキシ樹脂層を形成した。それ以外の内容は実施例1と同じにした。
4,4’-ジシクロヘキシルメタンジイソシアネート590g、シクロヘキシルイソシアネート62.6g及びカルボジイミド化触媒(3-メチル-1-フェニル-2-ホスホレン-1-オキシド)6.12gを180℃で48時間反応させることによって、カルボジイミド化合物として、4,4’-ジシクロヘキシルメタンカルボジイミド樹脂(重合度=10)を得た。
1リットルのセパラブルフラスコにエステル共重合アミド樹脂(商品名:「CM8000」、東レ株式会社製)50.0gとイソプロピルアルコールとトルエンとの混合溶媒(質量混合比4:6)450.0gとを加えて撹拌することにより溶解させた。こうして得られた溶液に上記カルボジイミド化合物(4,4’-ジシクロヘキシルメタンカルボジイミド樹脂)5.0gを加え、フラスコを120℃のオイルバスに浸漬させてリフラックス下で3時間加熱撹拌した後に、減圧乾燥して溶媒を除去することにより、カルボジイミド変性ポリアミドを得た。
実施例1において、ポリオレフィン樹脂層の代わりにエポキシ樹脂層を形成した。それ以外の内容は実施例1と同じにした。
厚み25μmのポリイミドフィルムの両面に、樹脂付き金属箔の第2絶縁層を重ねて貼り合わせ、180℃で1時間加熱加圧成形することによってサンプルを作製した。このサンプルの金属箔(銅箔)をサンプルの表面に対して90°方向に引き剥がしたときの銅箔引き剥がし強度を測定した。測定結果を表1及び表2に示す。
厚み25μmのポリイミドフィルムの片面に、厚み18μmの電解銅箔でMITパターンの回路が形成されたフレキシブルプリント配線板を準備した。このフレキシブルプリント配線板の両面に、樹脂付き金属箔の第2絶縁層を重ねて貼り合わせ、180℃で1時間加熱加圧成形した後、両面の樹脂付き金属箔の金属箔を全面エッチングにより除去することによってサンプルを作製した。このサンプルを用いてMIT試験を行った。測定条件は、折り曲げクランプのR=0.38mm、荷重500gf、毎分175回の割合で折り曲げるように設定した。回路の導通が取れなくなるまでの折り曲げ回数により屈曲性を評価した。具体的には100回以上を「合格」、100回未満を「不合格」とした。評価結果を表1及び表2に示す。
厚み25μmのポリイミドフィルムの両面に、樹脂付き金属箔の第2絶縁層を重ねて貼り合わせ、180℃で1時間加熱加圧成形することによってサンプルを作製した。このサンプルを260℃と288℃に加熱した半田浴にそれぞれ60秒間浸漬した後、外観を観察することにより半田耐熱性を評価した。膨れやはがれ等の外観異常の発生がないものを「合格」とし、これ以外のものを「不合格」とした。評価結果を表1及び表2に示す。
厚み35μmの圧延銅箔で櫛形パターンの回路が形成されたフレキシブルプリント配線板を準備し、このフレキシブルプリント配線板の回路形成面に樹脂付き金属箔の第2絶縁層を重ねて貼り合わせ、180℃で1時間加熱加圧成形することによってサンプルを作製した。このサンプルの断面を目視にて観察することにより回路充填性を評価した。回路間が全て樹脂で充填されているものを「合格」とし、これ以外のものを「不合格」とした。評価結果を表1及び表2に示す。
樹脂付き金属箔に直径10mmの孔をあけてから、この樹脂付き金属箔の第2絶縁層を電解銅箔の光沢面に重ねて貼り合わせ、170℃で30分間加熱加圧成形することによってサンプルを作製した。この際、樹脂が孔の内側に流れ出る長さを測定することにより樹脂流れ性を評価した。流れ出る量が1.0mm以下のものを「合格」とし、これ以外のものを「不合格」とした。評価結果を表1及び表2に示す。
5 フッ素樹脂層
6 ポリフェニレンエーテル樹脂層
8 ポリアミドイミド樹脂層
9 ポリイミド樹脂層
21 第1絶縁層
22 第2絶縁層
30 樹脂付き金属箔
40 フレキシブルプリント配線板
50 金属箔
Claims (7)
- 金属箔に第1絶縁層及び第2絶縁層がこの順に形成された樹脂付き金属箔であって、
前記第1絶縁層は、ポリイミド樹脂層、ポリアミドイミド樹脂層、液晶ポリマー樹脂層、フッ素樹脂層又はポリフェニレンエーテル樹脂層で形成され、
前記第2絶縁層は、半硬化状態のポリオレフィン樹脂層で形成されていると共に、
前記ポリオレフィン樹脂層が、成分(A)ポリオレフィン系エラストマーと、成分(B)熱硬化性樹脂とを含み、
前記ポリオレフィン樹脂層全体に占める前記成分(A)ポリオレフィン系エラストマーの割合が50~95質量%である、
樹脂付き金属箔。 - 前記成分(A)ポリオレフィン系エラストマーが、ポリスチレン-ポリ(エチレン/プロピレン)ブロック-ポリスチレン共重合体、ポリスチレン-ポリ(エチレン-エチレン/プロピレン)ブロック-ポリスチレン共重合体、ポリスチレン-ポリ(エチレン/ブチレン)ブロック-ポリスチレン共重合体、ポリスチレン-ポリイソプレンブロック共重合体、水添ポリスチレン-ポリイソプレン-ポリブタジエンブロック共重合体、ポリスチレン-ポリ(ブタジエン/ブチレン)ブロック-ポリスチレン共重合体、エチレン-グリシジルメタクリレート共重合体、エチレン-グリシジルメタクリレート-アクリル酸メチル共重合体及びエチレン-グリシジルメタクリレート-酢酸ビニル共重合体からなる群より選択される1種又は2種以上である、
請求項1に記載の樹脂付き金属箔。 - 前記成分(B)熱硬化性樹脂が、エポキシ樹脂、フェノール樹脂、ビスマレイミド樹脂及び両末端ビニル基のポリフェニレンエーテルオリゴマーからなる群より選択される1種又は2種以上である、
請求項1又は2に記載の樹脂付き金属箔。 - 前記ポリオレフィン樹脂層が、成分(C)硬化促進剤をさらに含む、
請求項1乃至3のいずれか一項に記載の樹脂付き金属箔。 - 前記ポリオレフィン樹脂層が、成分(D)充填材をさらに含む、
請求項1乃至4のいずれか一項に記載の樹脂付き金属箔。 - 前記ポリオレフィン樹脂層が、180℃で60分間処理した後の貯蔵弾性率が25℃~150℃において105~108Paである、
請求項1乃至5のいずれか一項に記載の樹脂付き金属箔。 - 請求項1乃至6のいずれか一項に記載の樹脂付き金属箔の前記第1絶縁層及び前記第2絶縁層の硬化物を絶縁層として有している、
フレキシブルプリント配線板。
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CN201780008161.7A CN108702840B (zh) | 2016-01-26 | 2017-01-24 | 覆树脂金属箔和柔性印刷线路板 |
KR1020187021181A KR20180111809A (ko) | 2016-01-26 | 2017-01-24 | 수지 피복 금속박, 플렉서블 프린트 배선판 |
US16/072,715 US10751976B2 (en) | 2016-01-26 | 2017-01-24 | Resin-clad metal foil and flexible printed wiring board |
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