CN209949554U - Take rubber coating metal forming and circuit board of carrier - Google Patents
Take rubber coating metal forming and circuit board of carrier Download PDFInfo
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- CN209949554U CN209949554U CN201822071755.7U CN201822071755U CN209949554U CN 209949554 U CN209949554 U CN 209949554U CN 201822071755 U CN201822071755 U CN 201822071755U CN 209949554 U CN209949554 U CN 209949554U
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 520
- 239000002184 metal Substances 0.000 title claims abstract description 519
- 238000010073 coating (rubber) Methods 0.000 title description 9
- 239000011888 foil Substances 0.000 claims abstract description 311
- 230000004888 barrier function Effects 0.000 claims abstract description 132
- 239000002131 composite material Substances 0.000 claims abstract description 37
- 238000009792 diffusion process Methods 0.000 claims abstract description 36
- 239000002313 adhesive film Substances 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 9
- 239000010410 layer Substances 0.000 claims description 910
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 63
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 52
- 229910052802 copper Inorganic materials 0.000 claims description 44
- 239000010949 copper Substances 0.000 claims description 44
- 239000000956 alloy Substances 0.000 claims description 40
- 229910045601 alloy Inorganic materials 0.000 claims description 38
- 239000002356 single layer Substances 0.000 claims description 37
- 229910052759 nickel Inorganic materials 0.000 claims description 26
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 24
- 239000012790 adhesive layer Substances 0.000 claims description 20
- 239000011889 copper foil Substances 0.000 claims description 19
- 230000003647 oxidation Effects 0.000 claims description 18
- 238000007254 oxidation reaction Methods 0.000 claims description 18
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 17
- 239000000853 adhesive Substances 0.000 claims description 16
- 230000001070 adhesive effect Effects 0.000 claims description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 15
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 15
- 229910002804 graphite Inorganic materials 0.000 claims description 15
- 239000010439 graphite Substances 0.000 claims description 15
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 14
- 229910052748 manganese Inorganic materials 0.000 claims description 14
- 239000011572 manganese Substances 0.000 claims description 14
- 229910052782 aluminium Inorganic materials 0.000 claims description 13
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 12
- 229910052742 iron Inorganic materials 0.000 claims description 12
- 229910052750 molybdenum Inorganic materials 0.000 claims description 12
- 239000011733 molybdenum Substances 0.000 claims description 12
- 229910052725 zinc Inorganic materials 0.000 claims description 12
- 239000011701 zinc Substances 0.000 claims description 12
- 229920005989 resin Polymers 0.000 claims description 10
- 239000011347 resin Substances 0.000 claims description 10
- 229920005992 thermoplastic resin Polymers 0.000 claims description 10
- 229920001187 thermosetting polymer Polymers 0.000 claims description 10
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 8
- 229910052719 titanium Inorganic materials 0.000 claims description 8
- 239000010936 titanium Substances 0.000 claims description 8
- 229910052721 tungsten Inorganic materials 0.000 claims description 7
- 239000010937 tungsten Substances 0.000 claims description 7
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 6
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 5
- 230000003064 anti-oxidating effect Effects 0.000 claims description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- 229910052804 chromium Inorganic materials 0.000 claims description 4
- 239000011651 chromium Substances 0.000 claims description 4
- 229910017052 cobalt Inorganic materials 0.000 claims description 4
- 239000010941 cobalt Substances 0.000 claims description 4
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 4
- 229910052758 niobium Inorganic materials 0.000 claims description 4
- 239000010955 niobium Substances 0.000 claims description 4
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 229910052726 zirconium Inorganic materials 0.000 claims description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 3
- 239000004593 Epoxy Substances 0.000 claims description 3
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims description 3
- 229920000877 Melamine resin Polymers 0.000 claims description 3
- 239000004952 Polyamide Substances 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 239000004793 Polystyrene Substances 0.000 claims description 3
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 3
- 229920000180 alkyd Polymers 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 3
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims description 3
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 3
- 229920002647 polyamide Polymers 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- -1 polyethylene Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 229920002223 polystyrene Polymers 0.000 claims description 3
- 239000005060 rubber Substances 0.000 claims description 3
- 239000003292 glue Substances 0.000 abstract description 8
- 238000002360 preparation method Methods 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 238000007747 plating Methods 0.000 description 45
- 238000009713 electroplating Methods 0.000 description 33
- 238000000034 method Methods 0.000 description 27
- 238000004544 sputter deposition Methods 0.000 description 23
- 230000008569 process Effects 0.000 description 19
- 239000002253 acid Substances 0.000 description 16
- 238000010438 heat treatment Methods 0.000 description 12
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 description 12
- 229910000990 Ni alloy Inorganic materials 0.000 description 11
- 239000010408 film Substances 0.000 description 9
- 229910000365 copper sulfate Inorganic materials 0.000 description 8
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 8
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 6
- 239000002202 Polyethylene glycol Substances 0.000 description 6
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 229920001223 polyethylene glycol Polymers 0.000 description 6
- 229910052708 sodium Inorganic materials 0.000 description 6
- 239000011734 sodium Substances 0.000 description 6
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 6
- 239000000080 wetting agent Substances 0.000 description 6
- 229910001182 Mo alloy Inorganic materials 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 229910000531 Co alloy Inorganic materials 0.000 description 4
- 229910000570 Cupronickel Inorganic materials 0.000 description 4
- 239000000654 additive Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 description 4
- QELJHCBNGDEXLD-UHFFFAOYSA-N nickel zinc Chemical compound [Ni].[Zn] QELJHCBNGDEXLD-UHFFFAOYSA-N 0.000 description 4
- 230000002265 prevention Effects 0.000 description 4
- 230000003746 surface roughness Effects 0.000 description 4
- AFTDTIZUABOECB-UHFFFAOYSA-N [Co].[Mo] Chemical compound [Co].[Mo] AFTDTIZUABOECB-UHFFFAOYSA-N 0.000 description 3
- HZEWFHLRYVTOIW-UHFFFAOYSA-N [Ti].[Ni] Chemical compound [Ti].[Ni] HZEWFHLRYVTOIW-UHFFFAOYSA-N 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- DDTIGTPWGISMKL-UHFFFAOYSA-N molybdenum nickel Chemical compound [Ni].[Mo] DDTIGTPWGISMKL-UHFFFAOYSA-N 0.000 description 3
- MOWMLACGTDMJRV-UHFFFAOYSA-N nickel tungsten Chemical compound [Ni].[W] MOWMLACGTDMJRV-UHFFFAOYSA-N 0.000 description 3
- 238000007788 roughening Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 229910000599 Cr alloy Inorganic materials 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 239000000788 chromium alloy Substances 0.000 description 2
- QNHZQZQTTIYAQM-UHFFFAOYSA-N chromium tungsten Chemical compound [Cr][W] QNHZQZQTTIYAQM-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- NNSIWZRTNZEWMS-UHFFFAOYSA-N cobalt titanium Chemical compound [Ti].[Co] NNSIWZRTNZEWMS-UHFFFAOYSA-N 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- ZPZCREMGFMRIRR-UHFFFAOYSA-N molybdenum titanium Chemical compound [Ti].[Mo] ZPZCREMGFMRIRR-UHFFFAOYSA-N 0.000 description 1
- MGRWKWACZDFZJT-UHFFFAOYSA-N molybdenum tungsten Chemical compound [Mo].[W] MGRWKWACZDFZJT-UHFFFAOYSA-N 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- MAKDTFFYCIMFQP-UHFFFAOYSA-N titanium tungsten Chemical compound [Ti].[W] MAKDTFFYCIMFQP-UHFFFAOYSA-N 0.000 description 1
- PMTRSEDNJGMXLN-UHFFFAOYSA-N titanium zirconium Chemical compound [Ti].[Zr] PMTRSEDNJGMXLN-UHFFFAOYSA-N 0.000 description 1
- 150000003657 tungsten Chemical class 0.000 description 1
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Abstract
The utility model relates to the technical field of materials, and discloses a gumming metal foil with a carrier and a circuit board, wherein the gumming metal foil with the carrier comprises a composite metal foil and a glue film layer, and the composite metal foil comprises a carrier layer, a barrier layer, a stripping layer and a metal foil layer; the carrier layer, the barrier layer, the stripping layer and the metal foil layer are sequentially stacked; or the carrier layer, the stripping layer, the barrier layer and the metal foil layer are sequentially stacked; the adhesive film layer is arranged on one side of the metal foil layer far away from the carrier layer; wherein, at the temperature of 20-400 ℃, the diffusion depth of the carrier layer to the metal foil layer is less than or equal to 3 μm, and the diffusion depth of the metal foil layer to the carrier layer direction is less than or equal to 3 μm, the carrier layer and the metal foil layer are prevented from being bonded by mutual diffusion at high temperature by arranging the barrier layer, so that the carrier layer and the metal foil layer are easy to peel, and then the complete extremely thin metal foil layer with fewer pinholes can be obtained, which is beneficial to the preparation of subsequent fine circuits.
Description
Technical Field
The utility model relates to the technical field of materials, especially, relate to a take rubber coating metal forming and circuit board of carrier.
Background
With the high density integration of electronic parts, the wiring pattern of circuit boards has become more and more dense (i.e., fine wiring boards are formed), and the problem of wire breakage is likely to occur when a thick metal foil is used for the wiring, so that it is necessary to use a thin metal foil for the formation of fine wiring boards. The gluing metal foil is an important material of a circuit board, the existing gluing metal foil generally comprises a composite metal foil and a glue film layer arranged on the composite metal foil, wherein the composite metal foil comprises a carrier layer and a metal foil layer, when the circuit board is prepared, the gluing metal foil with the carrier needs to be pressed at high temperature, and the carrier layer is peeled off after the pressing, but the carrier layer and the metal foil layer are easy to diffuse mutually under the high-temperature condition, so that the carrier layer is bonded with the metal foil layer, the carrier layer and the metal foil layer are difficult to peel off, the metal foil layer has more pinholes, and the preparation of subsequent micro circuits is not facilitated.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a take rubber coating metal forming and circuit board of carrier, it can avoid taking the carrier layer and the metal foil layer interdiffusion of composite metal forming to cause the bonding when the high temperature in the rubber coating metal forming of carrier now to make carrier layer and metal foil layer easily peel off.
In order to solve the technical problem, an embodiment of the present invention provides a coated metal foil with a carrier, where the coated metal foil with the carrier includes a composite metal foil and a glue film layer, and the composite metal foil includes a carrier layer, a barrier layer, a peeling layer, and a metal foil layer;
the carrier layer, the barrier layer, the peeling layer and the metal foil layer are sequentially stacked; or,
the carrier layer, the stripping layer, the barrier layer and the metal foil layer are sequentially stacked;
the adhesive film layer is arranged on one side of the metal foil layer far away from the carrier layer;
wherein, at the temperature of 20-400 ℃, the diffusion depth of the carrier layer to the metal foil layer is less than or equal to 3 μm, and the diffusion depth of the metal foil layer to the direction of the carrier layer is less than or equal to 3 μm.
Preferably, the diffusion depth of the carrier layer to the metal foil layer is less than or equal to 1 μm, and the diffusion depth of the metal foil layer to the carrier layer direction is less than or equal to 1 μm.
Preferably, the carrier layer, the release layer, the barrier layer, and the metal foil layer are sequentially stacked, and the peel strength between the metal foil layer and the barrier layer is greater than the peel strength between the release layer and the barrier layer.
Preferably, the barrier layer comprises a high temperature resistant layer, and the high temperature resistant layer is an organic high temperature resistant layer; or the high-temperature resistant layer is made of any one of tungsten, chromium, zirconium, titanium, nickel, molybdenum, cobalt and graphite.
Preferably, the barrier layer includes a high temperature resistant layer having a single-layer alloy structure or a multilayer structure including a single metal layer or a multilayer structure including an alloy layer and a single metal layer.
As preferred scheme, the carrier layer the barrier layer the peel ply with the metal foil layer sets up in proper order range upon range of, the barrier layer still includes the metal tie coat, the metal tie coat is located the carrier layer with between the high temperature resistant layer.
As preferred scheme, the carrier layer, the peel ply the barrier layer with the metal foil layer is range upon range of the setting in proper order, the barrier layer still includes the metal tie coat, the metal tie coat is located high temperature resistant layer with between the metal foil layer.
Preferably, the metal bonding layer is made of any one of copper, zinc, nickel, iron and manganese.
Preferably, the metal bonding layer has a single-layer alloy structure, a multilayer structure including a single metal layer, or a multilayer structure including an alloy layer and a single metal layer.
Preferably, the stripping layer is made of any one of nickel, silicon, molybdenum, graphite, titanium and niobium; or the stripping layer is made of an organic high molecular material.
Preferably, the thickness of the metal foil layer is less than or equal to 9 μm.
Preferably, the metal foil layer is a copper foil or an aluminum foil; and/or the carrier layer is carrier copper or carrier aluminum or an organic film.
Preferably, the roughness Rz of one surface of the carrier layer close to the metal foil layer is less than or equal to 5 μm; and/or the roughness Rz of the side of the metal foil layer facing away from the carrier layer is less than or equal to 3.0 μm.
Preferably, a first anti-oxidation layer is arranged on one side, close to the barrier layer, of the carrier layer; and/or a second anti-oxidation layer is arranged on one side, far away from the barrier layer, of the metal foil layer.
Preferably, the adhesive film layer is thermoplastic resin or thermosetting resin; the thermoplastic resin comprises polystyrene, vinyl acetate, polyester, polyethylene, polyamide, rubber or acrylate thermoplastic resin, and the thermosetting resin comprises phenolic, epoxy, urethane, melamine or alkyd thermosetting resin.
Preferably, the thickness of the adhesive film layer is 20-200 μm.
In order to solve the same technical problem, the embodiment of the utility model provides a still provide a circuit board, the circuit board uses the rubber coating metal forming of taking the carrier obtain.
The embodiment of the utility model provides a take rubber coating metal forming and circuit board of carrier, wherein, the rubber coating metal forming of taking the carrier includes composite metal forming and glued membrane layer, and composite metal forming includes carrier layer, barrier layer, peel ply and metal foil layer, sets up through carrier layer, barrier layer, peel ply and metal foil layer range upon range of in proper order; or the carrier layer, the stripping layer, the barrier layer and the metal foil layer are sequentially stacked; the adhesive film layer is arranged on one side of the metal foil layer far away from the carrier layer; under the temperature of 20-400 ℃, the diffusion depth from the carrier layer to the metal foil layer is less than or equal to 3 μm, and the diffusion depth from the metal foil layer to the carrier layer direction is less than or equal to 3 μm, wherein the carrier layer is convenient to peel off by arranging the peeling layer, and the bonding caused by mutual diffusion of the carrier layer and the metal foil layer at high temperature is avoided by arranging the barrier layer, so that the carrier layer and the metal foil layer are easy to peel off, and further, the complete extremely thin metal foil layer with less pinholes can be obtained, and the preparation of a follow-up fine circuit is facilitated.
Drawings
Fig. 1 is a schematic structural view of a carrier layer, a barrier layer, a peeling layer and a metal foil layer sequentially stacked in one embodiment of a rubberized metal foil with a carrier according to the present invention;
fig. 2 is a schematic structural view of an embodiment of a coated metal foil with a carrier according to the present invention, which comprises a metal bonding layer and a high temperature resistant layer, wherein the carrier layer, a barrier layer, a release layer and a metal foil layer are sequentially stacked;
fig. 3 is a schematic structural view of a carrier layer, a peeling layer, a barrier layer and a metal foil layer sequentially stacked in one embodiment of the carrier-carrying rubberized metal foil according to the present invention;
fig. 4 is a schematic structural view of an embodiment of a coated metal foil with a carrier according to the present invention, which comprises a metal bonding layer and a high temperature resistant layer, wherein the carrier layer, a release layer, a barrier layer and a metal foil layer are sequentially stacked;
FIG. 5 is a schematic view of an embodiment of a carrier layer, a barrier layer, a peel layer, and a metal foil layer in a stacked arrangement;
fig. 6 is a schematic view of another embodiment of a carrier layer, a barrier layer, a peel layer, and a metal foil layer stacked in sequence;
fig. 7 is a schematic view of an embodiment of a carrier layer, a peel layer, a barrier layer, and a metal foil layer sequentially stacked in an adhesive coated metal foil with a carrier according to the present invention;
fig. 8 is a schematic view of another embodiment of a carrier layer, a release layer, a barrier layer, and a metal foil layer stacked in sequence;
fig. 9 is a schematic flow chart of an embodiment of a method for preparing a coated metal foil with a carrier according to the present invention;
fig. 10 is a schematic flow chart of another embodiment of a method for preparing a coated metal foil with a carrier according to the present invention;
wherein, 1, a carrier layer; 2. a barrier layer; 21. a high temperature resistant layer; 22. a metal bonding layer; 3. a peeling layer; 4. a metal foil layer; 5. and (5) a film layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1, a carrier-equipped rubberized metal foil according to a preferred embodiment of the present invention includes a composite metal foil including a carrier layer 1, a barrier layer 2, a peeling layer 3, and a metal foil layer 4, and an adhesive film layer 5;
the carrier layer 1, the barrier layer 2, the peeling layer 3 and the metal foil layer 4 are sequentially stacked; or,
referring to fig. 3, the carrier layer 1, the peeling layer 3, the barrier layer 2 and the metal foil layer 4 are sequentially stacked;
the adhesive film layer 5 is arranged on one side of the metal foil layer 4 far away from the carrier layer 1;
wherein, at the temperature of 20-400 ℃, the diffusion depth from the carrier layer 1 to the metal foil layer 4 is less than or equal to 3 μm, and the diffusion depth from the metal foil layer 4 to the direction of the carrier layer 1 is less than or equal to 3 μm.
In the embodiment of the present invention, the adhesive coated metal foil with a carrier includes a composite metal foil and an adhesive film layer 5, the composite metal foil includes a carrier layer 1, a barrier layer 2, a peeling layer 3 and a metal foil layer 4, and the carrier layer 1, the barrier layer 2, the peeling layer 3 and the metal foil layer 4 are sequentially stacked; or the carrier layer 1, the peeling layer 3, the barrier layer 2 and the metal foil layer 4 are sequentially stacked; the adhesive film layer 5 is arranged on one side of the metal foil layer 4 far away from the carrier layer 1; at the temperature of 20-400 ℃, the diffusion depth from the carrier layer 1 to the metal foil layer 4 is less than or equal to 3 μm, and the diffusion depth from the metal foil layer 4 to the direction of the carrier layer 1 is less than or equal to 3 μm, wherein, by arranging the release layer 3 to facilitate the release of the carrier layer 1, the carrier layer 1 and the metal foil layer 4 are prevented from mutual diffusion at high temperature to cause bonding by arranging the barrier layer 2, thereby enabling the carrier layer 1 and the metal foil layer 4 to be easily released.
Preferably, the diffusion depth of the carrier layer 1 to the metal foil layer 4 is less than or equal to 1 μm, and the diffusion depth of the metal foil layer 4 to the carrier layer 1 direction is less than or equal to 1 μm.
As shown in fig. 3 and 8, preferably, when the carrier layer 1, the peeling layer 3, the barrier layer 2, and the metal foil layer 4 are sequentially stacked, the peeling strength between the metal foil layer 4 and the barrier layer 2 is greater than the peeling strength between the peeling layer 3 and the barrier layer 2. When the carrier layer 1, the peeling layer 3, the barrier layer 2 and the metal foil layer 4 are sequentially stacked, the peeling strength between the metal foil layer 4 and the barrier layer 2 is greater than the peeling strength between the peeling layer 3 and the barrier layer 2, so that when the adhesive coated metal foil with the carrier is used, peeling occurs between the peeling layer 3 and the barrier layer 2, and the barrier layer 2 remains on the metal foil layer 4, so that the barrier layer 2 can play a role of preventing oxidation on the metal foil layer 4, thereby protecting the metal foil layer 4. Of course, the peel strength between the metal foil layer 4 and the barrier layer 2 may also be less than or equal to the peel strength between the peel layer 3 and the barrier layer 2, so that when the composite metal foil is peeled, the barrier layer 2 can be partially or completely left on the peel layer 3, and the carrier layer 1 and the peel layer 3 are peeled from the metal foil layer 4 at the same time, as shown in fig. 3 and 7, which is not described herein again.
As shown in fig. 1 and 6, when the carrier layer 1, the barrier layer 2, the peeling layer 3, and the metal foil layer 4 are sequentially stacked, the peeling strength between the peeling layer 3 and the metal foil layer 4 is greater than or equal to the peeling strength between the peeling layer 3 and the barrier layer 2. Since the peel strength between the peel layer 3 and the metal foil layer 4 is greater than or equal to the peel strength between the peel layer 3 and the barrier layer 2, the peel layer 3 can be partially or entirely left on the metal foil layer 4 when peeling the composite metal foil, so that the metal foil layer 4 can be prevented from being oxidized, thereby effectively protecting the metal foil layer 4. Of course, the peel strength between the peel layer 3 and the metal foil layer 4 may also be smaller than the peel strength between the peel layer 3 and the barrier layer 2, so that when the composite metal foil is peeled, the peel layer 3 can be partially or completely left on the barrier layer 2, and the carrier layer 1 and the barrier layer 2 are peeled from the metal foil layer 4 at the same time, which is shown in fig. 1 and 5 and will not be further described herein.
As shown in fig. 1 to 4, the barrier layer 2 includes a high temperature resistant layer 21, and the high temperature resistant layer 21 is an organic high temperature resistant layer 21; alternatively, the high temperature resistant layer 21 is made of any one or more of tungsten, chromium, zirconium, titanium, nickel, molybdenum, cobalt, and graphite. Preferably, the high temperature resistant layer 21 has a single layer alloy structure, or a multilayer structure composed of a single metal layer, or a multilayer structure composed of an alloy layer and a single metal layer. Specifically, the single-layer alloy structure is a single-layer structure made of an alloy material, for example, a single-layer structure made of a tungsten-chromium alloy; the multilayer structure of the single metal layer is a multilayer structure of a plurality of single-layer structures each made of one metal, for example, a multilayer structure of a tungsten metal layer and a chromium metal layer; the multilayer structure composed of the alloy layer and the single metal layer is a multilayer structure composed of a plurality of single-layer structures each composed of one metal or alloy material, such as a multilayer structure composed of a zirconium metal layer and a tungsten-chromium alloy layer.
As shown in fig. 1 and 2, when the carrier layer 1, the barrier layer 2, the release layer 3, and the metal foil layer 4 are sequentially stacked, in order to prevent delamination between the barrier layer 2 and the carrier layer 1, the barrier layer 2 in this embodiment further includes a metal adhesive layer 22, and the metal adhesive layer 22 is disposed between the carrier layer 1 and the high temperature resistant layer 21. For example, the barrier layer 2 includes a metal a that can be bonded to the carrier layer 1 and/or a metal B that is bonded to the high temperature resistant layer 21, thereby preventing peeling between the carrier layer 1 and the barrier layer 2. For example, metal a is copper or zinc; and metal B is nickel, iron or manganese. It is to be understood that the metallic bond layer 22 is made of any one or more of copper, zinc, nickel, iron, and manganese; alternatively, the metallic bond layer 22 is made of one of copper or zinc and one of nickel, iron, and manganese. The structure of the metal bonding layer 22 may include, but is not limited to, the following: (1) the metal bonding layer 22 is a single metal layer composed of metal a, wherein the metal a is copper or zinc; (2) the metal bonding layer 22 is a single metal layer composed of metal B, wherein the metal B is nickel, iron or manganese; (3) the metal bonding layer 22 is a single-layer alloy structure composed of a metal a and a metal B, for example, a single-layer alloy structure made of a copper-nickel alloy; (4) the metal bonding layer 22 includes a multilayer structure composed of an alloy layer and a single metal layer; wherein the alloy layer of the metal bonding layer 22 is made of metal a and metal B, and the single metal layer of the metal bonding layer 22 is made of metal a or metal B; for example, an alloy layer made of a copper-nickel alloy and a single metal layer made of manganese; (5) the metal adhesive layer 22 has a multilayer structure composed of a single-layer structure of metal a and a single-layer structure of metal B, for example, a multilayer structure composed of a copper metal layer and a nickel metal layer. When the metal adhesive layer 22 is a multilayer structure composed of a single-layer structure of metal A and a single-layer structure of metal B, the metalsThe single-layer structure of a is disposed between the carrier layer 1 and the single-layer structure of metal B, and since the adhesion force between metal a and the carrier layer 1 is stronger and the adhesion force between metal B and the high temperature-resistant layer 21 is stronger, the barrier layer 2 is not easily separated from the carrier layer 1 by disposing the single-layer structure of metal a between the carrier layer 1 and the single-layer structure of metal B. By providing the metal adhesive layer 22, the barrier layer 2 can be firmly connected with the carrier layer 1, thereby preventing the peeling between the barrier layer 2 and the carrier layer 1. Furthermore, the thickness of the barrier layer 2 is greater than or equal to
Preferably, the thickness of the barrier layer 2 is preferably such that
In the present embodiment, the thickness of the metal foil layer 4 is less than or equal to 9 μm. In order to meet the requirement of circuit board fine circuit production, the thickness of the metal foil layer 4 may be preferably 6 μm, 5 μm, 4 μm or 2 μm, so as to obtain an extremely thin metal foil layer 4 which is advantageous for forming a fine circuit board. In addition, in order to peel off from the carrier layer 1 to obtain the complete ultrathin metal foil layer 4 with few pinholes (especially, a metal foil layer with a thickness of 2 μm, 4 μm, etc.), in the present embodiment, the metal adhesive layer 22 is provided, so that the metal adhesive layer 22 not only enables the barrier layer 2 and the carrier layer 1 to have a strong peel strength, but also effectively ensures that the carrier layer 1 can be stably peeled off from the metal foil layer 4 to obtain the complete ultrathin metal foil layer 4, and the surface of the carrier layer 1 is processed by the metal adhesive layer 22, so that the whole surface of the carrier layer 1 is more uniform and compact, thereby being beneficial to peeling off from the carrier layer 1 to obtain the ultrathin metal foil layer 4 with few pinholes, and further being beneficial to the manufacture of subsequent circuits. In addition, the metal foil layer 4 is a copper foil or an aluminum foil; the carrier layer 1 can be carrier copper, carrier aluminum, or organic film, etc., and a certain thickness is needed because the carrier layer 1 mainly plays a role of carrying, and when the carrier layer 1 is carrier copper or carrier aluminum, the thickness of the carrier layer 1 is preferably 9-50 μm; when the support layer 1 is an organic thin film, the thickness of the support layer 1 is preferably 20 to 100 μm.
With reference to fig. 3 and 4, similarly, when the carrier layer 1, the peeling layer 3, the barrier layer 2 and the metal foil layer 4 are sequentially stacked, in order to allow the barrier layer 2 to remain on the metal foil layer 4 when the composite metal foil is peeled, thereby preventing the metal foil layer 4 from being oxidized, the barrier layer 2 may further include a metal adhesive layer 22, and the metal adhesive layer 22 is disposed between the high temperature resistant layer 21 and the metal foil layer 4. For example, the barrier layer 2 includes a metal a that may be bonded to the metal foil layer 4 and/or a metal B that may be bonded to the high temperature resistant layer 21, thereby preventing peeling between the metal foil layer 4 and the barrier layer 2. For example, metal a is copper or zinc; and metal B is nickel, iron or manganese. It is to be understood that the metallic bond layer 22 is made of any one or more of copper, zinc, nickel, iron, and manganese; alternatively, the metallic bond layer 22 is made of one of copper or zinc and one of nickel, iron, and manganese. The structure of the metal bonding layer 22 may include, but is not limited to, the following: (1) the metal bonding layer 22 is a single metal layer composed of metal a, wherein the metal a is copper or zinc; (2) the metal bonding layer 22 is a single metal layer composed of metal B, wherein the metal B is nickel, iron or manganese; (3) the metal bond layer 22 is a single-layer alloy structure composed of a metal a and a metal B, such as a single-layer alloy structure made of a copper-nickel alloy; (4) the metal bonding layer 22 includes a multilayer structure composed of an alloy layer and a single metal layer; wherein the alloy layer of the metal bonding layer 22 is made of metal a and metal B, and the single metal layer of the metal bonding layer 22 is made of metal a or metal B; for example, an alloy layer made of a copper-nickel alloy and a single metal layer made of manganese; (5) the metal adhesive layer 22 has a multilayer structure composed of a single-layer structure of metal a and a single-layer structure of metal B, for example, a multilayer structure composed of a copper metal layer and a nickel metal layer. When the metal bonding layer 22 is a single layer structure composed of a metal A and a single layer of a metal BIn the case of a multi-layered structure composed of the metal a, the metal a single-layered structure is disposed between the metal foil layer 4 and the metal B single-layered structure, and since the metal a and the metal foil layer 4 have a stronger adhesive force ratio and the metal B and the high temperature resistant layer 21 have a stronger adhesive force ratio, the barrier layer 2 is not easily separated from the metal foil layer 4 by disposing the metal a single-layered structure between the metal foil layer 4 and the metal B single-layered structure. By arranging the metal bonding layer 22, the barrier layer 2 can be firmly connected with the metal foil layer 4, so that the barrier layer 2 and the carrier layer 1 are prevented from being peeled off, and when the composite metal foil is peeled off, the barrier layer 2 can be left on the metal foil layer 4, so that the metal foil layer 4 is prevented from being oxidized, and the metal foil layer 4 is protected. Furthermore, the thickness of the barrier layer 2 is greater than or equal to
Preferably, the thickness of the barrier layer 2 is preferably such that
In the embodiment of the present invention, the peeling layer 3 is made of any one or more materials of nickel, silicon, molybdenum, graphite, titanium, and niobium; alternatively, the peeling layer 3 is made of an organic polymer material. Wherein the thickness of the peeling layer 3 is preferablySince it is difficult to form a uniform metal foil layer 4 when the peeling layer 3 is too thick, a large number of pinholes are easily generated in the metal foil layer 4 (when pinholes are formed in the metal foil layer 4, a disconnection phenomenon is easily generated after it is etched into a wiring); when the peeling layer 3 is too thin, it is liable to cause difficulty in peeling from the metal foil layer 4; therefore, the thickness of the peeling layer 3 is preferably set to be thick
Thereby ensuring that a uniform metal can be formedThe foil layer 4 prevents a large number of pinholes from being generated in the metal foil layer 4, and at the same time, the peeling layer 3 and the metal foil layer 4 are easily peeled from each other.
In the embodiment of the present invention, the roughness Rz of the surface of the carrier layer 1 near the metal foil layer 4 is less than or equal to 5 μm; and/or the roughness Rz of the side of the metal foil layer 4 facing away from the carrier layer 1 is less than or equal to 3.0 μm. When the metal foil layer 4 is a copper foil, the larger the roughness of the copper foil is, the larger the adhesion force between the copper foil and other materials is, but when the roughness of the copper foil is too large, the copper foil cannot be applied to a circuit board for high-frequency signal transmission, so that the roughness Rz of a general copper foil is 0.5 to 3.0 μm; when the copper foil is applied at high frequency, the roughness of the copper foil is set to be less than 0.5 μm, so that the copper foil can be applied to a circuit board for high frequency signal transmission on the premise of ensuring the adhesive force between the copper foil and other materials.
In the embodiment of the present invention, it should be noted that the roughness Rz represents the maximum height of the profile: the distance between the peak and valley lines of the profile. The sampling length is a length of a reference line specified by evaluating the surface roughness, the sampling length is selected according to the forming condition and the texture characteristics of the actual surface of the part, and the sampling length is measured according to the total trend of the actual surface profile.
In the embodiment of the present invention, in order to prevent the carrier layer 1 from being oxidized, a first oxidation preventing layer is disposed on a side of the carrier layer 1 close to the barrier layer 2; the carrier layer 1 is protected by providing a first oxidation preventing layer on the side of the carrier layer 1 adjacent to the barrier layer 2 to prevent oxidation of the carrier layer 1. In order to prevent the metal foil layer 4 from being oxidized, a second oxidation preventing layer is arranged on one side, away from the barrier layer 2, of the metal foil layer 4, and the second oxidation preventing layer is arranged on one side, away from the barrier layer 2, of the metal foil layer 4, so that the metal foil layer 4 is prevented from being oxidized, and the metal foil layer 4 is protected.
In the embodiment of the present invention, the adhesive film layer 5 is preferably a thermoplastic resin or a thermosetting resin; wherein the thermoplastic resin comprises polystyrene, vinyl acetate, polyester, polyethylene, polyamide, rubber or acrylate thermoplastic resin, the thermosetting resin comprises phenolic, epoxy, urethane, melamine or alkyd thermosetting resin, and the thickness of the adhesive film layer is preferably 20-200 μm. The adhesive film layer 5 is made of thermoplastic resin or thermosetting resin, so that the circuit board can be prepared conveniently.
In the embodiment of the present invention, the coated metal foil with carrier can be used for preparing a substrate, for example, when the metal foil layer 4 is a copper foil, the coated metal foil with carrier can be used for preparing a flexible copper clad laminate; the method for preparing the substrate by using the adhesive coated metal foil with the carrier can adopt the prior art, and further details are not given herein.
In addition, in order to solve the same technical problem, the embodiment of the present invention further provides a circuit board, wherein the circuit board is obtained by using the adhesive coated metal foil with the carrier; wherein the wiring board may be a multilayer board, for example: high density interconnect boards (HDI boards), build-up multilayer boards (BUM boards), and the like. In addition, the method for manufacturing a circuit board by using the carrier-carrying adhesive metal foil can adopt the prior art, and it should be known that when the circuit board is manufactured by using the carrier-carrying adhesive metal foil, the carrier layer 1 needs to be peeled off, and then the circuit board is manufactured by using the prior art method for manufacturing a circuit board.
With reference to fig. 9 to 10, in order to solve the same technical problem, an embodiment of the present invention further provides a method for preparing the adhesive coated metal foil with carrier, including the following steps:
s11, forming a carrier layer 1;
s12, forming a barrier layer 2 on one side of the carrier layer 1;
s13, forming a release layer 3 on the barrier layer 2;
s14, forming a metal foil layer 4 on the peeling layer 3 to obtain a composite metal foil;
s15, forming a glue film layer 5 on the metal foil layer 4 to obtain a glue coated metal foil with a carrier;
or,
s21, forming a carrier layer 1;
s22, forming a peeling layer 3 on one side of the carrier layer 1;
s23, forming a barrier layer 2 on the peeling layer 3;
s24, forming a metal foil layer 4 on the barrier layer 2 to obtain a composite metal foil;
s25, forming a glue film layer 5 on the metal foil layer 4 to obtain a glue coated metal foil with a carrier;
wherein, at the temperature of 20-400 ℃, the diffusion depth from the carrier layer 1 to the metal foil layer 4 is less than or equal to 3 μm, and the diffusion depth from the metal foil layer 4 to the direction of the carrier layer 1 is less than or equal to 3 μm.
Preferably, the diffusion depth of the carrier layer 1 to the metal foil layer 4 is less than or equal to 1 μm, and the diffusion depth of the metal foil layer 4 to the carrier layer 1 direction is less than or equal to 1 μm.
As shown in fig. 3 and 8, preferably, when the carrier layer 1, the peeling layer 3, the barrier layer 2, and the metal foil layer 4 are sequentially stacked, the peeling strength between the metal foil layer 4 and the barrier layer 2 is greater than the peeling strength between the peeling layer 3 and the barrier layer 2. When the carrier layer 1, the peeling layer 3, the barrier layer 2 and the metal foil layer 4 are sequentially stacked, the peeling strength between the metal foil layer 4 and the barrier layer 2 is greater than the peeling strength between the peeling layer 3 and the barrier layer 2, so that when the adhesive coated metal foil with the carrier is used, peeling occurs between the peeling layer 3 and the barrier layer 2, and the barrier layer 2 remains on the metal foil layer 4, so that the barrier layer 2 can play a role of preventing oxidation on the metal foil layer 4, thereby protecting the metal foil layer 4. Of course, the peel strength between the metal foil layer 4 and the barrier layer 2 may also be less than or equal to the peel strength between the peel layer 3 and the barrier layer 2, so that when the composite metal foil is peeled, the barrier layer 2 can be partially or completely left on the peel layer 3, and the carrier layer 1 and the peel layer 3 are peeled from the metal foil layer 4 at the same time, as shown in fig. 3 and 7, which is not described herein again.
In the embodiment of the present invention, the forming of the barrier layer 2 on one side of the carrier layer 1 specifically is:
s131, forming a metal adhesive layer 22 on one side of the carrier layer 1;
and S132, forming a high temperature resistant layer 21 on the metal bonding layer 22.
In the embodiment of the present invention, the barrier layer 2 formed on the peeling layer 3 specifically includes:
s231, forming a high temperature resistant layer 21 on the peeling layer 3;
and S232, forming a metal bonding layer 22 on the high-temperature resistant layer 21.
In the embodiment of the present invention, the metal bonding layer 22 and the high temperature resistant layer 21 can be formed by sputtering, the current of the sputtering method is preferably 6-12A, and the voltage is preferably 300-500V. The metallic bond layer 22 may be made of any one or more of copper, zinc, nickel, iron, and manganese; alternatively, the metallic bond layer 22 is made of one of copper or zinc and one of nickel, iron, and manganese. The high temperature resistant layer 21 may be an organic high temperature resistant layer 21; or, the high temperature resistant layer 21 may be made of any one or more of tungsten, chromium, zirconium, titanium, nickel, molybdenum, cobalt, and graphite, and the high temperature resistant layer 21 may be a single-layer alloy structure or a multi-layer structure consisting of a single metal layer or a multi-layer structure consisting of an alloy layer and a single metal layer.
In an embodiment of the present invention, the forming of the carrier layer 1 specifically includes the following steps:
s111, carrying out first electroplating to generate a first metal layer;
s112, performing second electroplating on the surface of the first metal layer to generate a second metal layer, wherein the first metal layer and the second metal layer form a carrier layer;
in the embodiment of the present invention, after the forming of the carrier layer 1, the following steps are further included:
s113, roughening the carrier layer 1 to obtain a roughened carrier layer 1;
s114, forming a first anti-oxidation layer on the roughened carrier layer 1;
the carrier layer 1 may be carrier copper or carrier aluminum, when the carrier layer 1 is carrier copper, the first metal layer and the second metal layer are both copper metal layers, and when the carrier layer 1 is carrier aluminum, the first metal layer and the second metal layer are both aluminum metal layers. The plating solution for the first electroplating may include a copper sulfate solution, wherein the copper content of the plating solution for the first electroplating is: 15-25g/L, and the pH value is 6-9; the plating solution for the second plating may include a copper sulfate solution, wherein the plating solution for the second plating has a copper content of 70 to 80g/L and an acid content of 90 to 100g/L, and further includes additives including brightener sodium sulfonate, leveling agent thiourea, and wetting agent polyethylene glycol, the mass fraction of the brightener sodium sulfonate is preferably 0.1 to 2g/L, the mass fraction of the leveling agent thiourea is preferably 0.01 to 1g/L, and the mass fraction of the wetting agent polyethylene glycol is preferably 0.1 to 5 g/L. The carrier layer 1 is roughened by means of acid electroplating, wherein the plating solution for acid copper plating can comprise a copper sulfate solution, wherein the copper content of the plating solution for acid copper plating is 10-15g/L, the acid content is 90-100g/L, and the molybdenum content is 600-800 PPM. Wherein, the first oxidation prevention layer can be formed in a zinc-nickel alloy plating mode; after the first oxidation preventing layer is formed on the roughened carrier layer 1, the first oxidation preventing layer may be plasma cleaned (plasma), wherein the voltage for plasma cleaning is preferably 1500-.
In the embodiment of the present invention, in order to further prevent the adhesion between the carrier layer 1 and the metal foil layer 4, the carrier layer 1 is formed and then the carrier layer further includes:
s115, annealing the carrier layer 1 under the heat treatment condition; wherein the heat treatment conditions are as follows: the heat treatment temperature is 200-300 ℃, and the heating time is 30-300 minutes. Preferably, the heating time is 1 hour. The carrier layer 1 is annealed under heat treatment conditions to suppress crystal growth of the carrier layer 1 in the heating process, thereby delaying diffusion of the carrier layer 1 in the heating process and further preventing adhesion between the carrier layer 1 and the metal foil layer 4.
In the embodiment of the present invention, the peeling layer 3 may be made of any one or more materials of nickel, silicon, molybdenum, graphite, titanium, and niobium. In addition, the peeling layer 3 is formed on the barrier layer 2 or the peeling layer 3 is formed on one side of the carrier layer 1, specifically, a sputtering method may be adopted, wherein the sputtering conditions for forming the peeling layer 3 by the sputtering method may include: the current is preferably 6-12A, and the voltage is preferably 300-500V.
Because adopt the electroplating mode to lead to easily the barrier layer 2 with the roughness of peel ply 3 receives the influence of electric current when electroplating, thereby makes the formation the barrier layer 2 with the surface roughness of peel ply 3 is very inhomogeneous, thereby leads to follow-up formation the surface roughness of metal foil layer 4 is also inhomogeneous, is unfavorable for forming good peeling stability and pinhole quantity then, also does not benefit to the preparation of follow-up circuit simultaneously. In this regard, in the embodiment of the present invention, the metal adhesion layer 22, the high temperature resistant layer 21 and the peeling layer 3 are preferably sputtered, the current of the sputtering method is preferably 6-12A, and the voltage is preferably 300-. The metal bonding layer 22 and the high temperature resistant layer 21 formed by sputtering constitute the barrier layer 2 to ensure that a uniform and dense barrier layer 2 is obtained, and the uniform and dense peeling layer 3 is formed by sputtering, thereby facilitating improvement of peeling stability of the composite metal foil and enabling effective reduction of the number of pinholes; in addition, the metal foil layer 4 is preferably formed by electroplating, and before the metal foil layer 4 is formed, the uniform and dense barrier layer 2 and the peeling layer 3 are formed by sputtering, so that the metal foil layer 4 is uniformly electroplated, the surface roughness of the formed metal foil layer 4 is uniform, the subsequent circuit is further facilitated to be manufactured, and the thinner metal foil layer 4 is facilitated to be manufactured.
In the embodiment of the present invention, the forming of the metal foil layer 4 on the peeling layer 3 specifically includes:
s141, sputtering a third metal layer on the peeling layer 3;
s142, electroplating a fourth metal layer on the sputtered third metal layer, wherein the third metal layer and the fourth metal layer form the metal foil layer; or,
the forming of the metal foil layer 4 on the barrier layer 2 is specifically as follows:
s241, sputtering a third metal layer on the barrier layer 2;
and S242, electroplating a fourth metal layer on the sputtered third metal layer, wherein the third metal layer and the fourth metal layer form the metal foil layer.
The metal foil layer 4 can be a copper foil or an aluminum foil, and when the metal foil layer 4 is a copper foil, the third metal layer and the fourth metal layer are both copper metal layers; when the metal foil layer 4 is an aluminum foil, the third metal layer and the fourth metal layer are both aluminum metal layers. Because the peel ply 3 has the stripping nature, if adopt the electroplating mode alone, it is inhomogeneous easily to lead to the metal level of electroplating, in order to obtain the even metal foil layer 4 in surface, this embodiment is at first through sputtering the third metal level, electroplates the fourth metal level again to avoid metal foil layer 4 to produce the pinhole, and then obtain the even metal foil layer 4 in surface. Wherein the sputtering conditions for sputtering the third metal layer on the peeling layer 3 or sputtering the third metal layer on the barrier layer 2 are as follows: the current is preferably 6-12A, the voltage is preferably 300-500V, the vacuum degree is preferably 0.1-0.5Pa, the sputtering speed is preferably 4-10m/min, and the winding and unwinding tension is preferably 60-150N.
In an embodiment of the present invention, the electroplating of the fourth metal layer on the sputtered third metal layer specifically includes the following steps:
s31, performing third electroplating to generate fifth metal;
s32, performing fourth electroplating on the surface of the fifth metal layer to generate a sixth metal layer, wherein the fifth metal layer and the sixth metal layer form the fourth metal layer;
wherein the plating solution for the third electroplating may include a copper sulfate solution, wherein the copper content of the plating solution for the third electroplating is: 15-25g/L, and the pH value is 6-9; the plating solution for the fourth electroplating may include a copper sulfate solution, wherein the copper content of the plating solution for the fourth electroplating is 70 to 80g/L, the acid content is 90 to 100g/L, the plating solution for the fourth electroplating includes additives including brightener sodium sulfonate, leveler thiourea, and wetting agent polyethylene glycol, the mass fraction of the brightener sodium sulfonate is preferably 0.1 to 2g/L, the mass fraction of the leveler thiourea is preferably 0.01 to 1g/L, and the mass fraction of the wetting agent polyethylene glycol is preferably 0.1 to 5 g/L. The metal foil layer 4 can be a copper foil or an aluminum foil, and when the metal foil layer 4 is a copper foil, the fifth metal layer and the sixth metal layer are both copper metal layers; when the metal foil layer 4 is an aluminum foil, the fifth metal layer and the sixth metal layer are both aluminum metal layers. In the embodiment of the present invention, in order to avoid the warpage of the composite metal foil, the plating solution (including the plating solution for the first electroplating, the plating solution for the second electroplating, the plating solution for the third electroplating, and the plating solution for the fourth electroplating) of the carrier layer 1 and the metal foil layer 4 is set to be the same in this embodiment, so that the stress action and the tensile force action of the carrier layer 1 and the metal foil layer 4 are the same, thereby making the bending degree of the carrier layer 1 and the metal foil layer 4 be the same, and further avoiding the warpage of the composite metal foil.
In an embodiment of the present invention, the method for preparing the composite metal foil further includes:
and S41, roughening the side of the metal foil layer 4 away from the carrier layer 1.
And S42, forming a second oxidation prevention layer on one surface of the roughened metal foil layer 4, which is far away from the carrier layer 1.
Wherein, the surface of the metal foil layer 4 far away from the carrier layer 1 is roughened by an acid electroplating mode, wherein the copper content of the acid copper plating solution is 10-15g/L, the acid content is 90-100g/L, and the molybdenum content is 600-800 PPM; wherein, the second oxidation prevention layer can be formed in a zinc-nickel alloy plating mode; after the second oxidation preventing layer is formed, plasma cleaning (plasma) may be performed on the second oxidation preventing layer, wherein the voltage during plasma cleaning is preferably 1500-.
The embodiment of the utility model provides an in form adhesive film layer 5 on the metal foil layer 4, obtain the rubber coating metal foil of taking the carrier, specifically can be directly adhesive film layer 5 on the metal foil layer 4, of course, can also be in through other modes form adhesive film layer 5 on the metal foil layer 4, do not do more and describe here.
The following examples are provided to illustrate the preparation of composite metal foils, in particular as follows:
example 1
S51, forming a carrier layer 1; specifically, first electroplating is carried out to generate a first metal layer; then, carrying out second electroplating on the surface of the first metal layer to generate a second metal layer, wherein the first metal layer and the second metal layer form a carrier layer; next, the carrier layer 1 is roughened, and a first oxidation preventing layer is formed on the roughened carrier layer 1. Annealing the carrier layer 1 under heat treatment conditions; wherein the heat treatment conditions are as follows: the heat treatment temperature was 250 ℃ and the heating time was 1 hour. Wherein, the carrier layer 1 is carrier copper, the plating solution for the first electroplating comprises copper sulfate solution, and the copper content of the plating solution for the first electroplating is as follows: 20g/L and the pH value is 7; the plating solution for the second electroplating can comprise a copper sulfate solution, wherein the copper content of the plating solution for the second electroplating is 75g/L, the acid content is 95g/L, the plating solution for the second electroplating further comprises additives, the additives comprise brightener sodium sulfonate, leveling agent thiourea and wetting agent polyethylene glycol, the mass fraction of the brightener sodium sulfonate is 0.8g/L, the mass fraction of the leveling agent thiourea is 0.5g/L, and the mass fraction of the wetting agent polyethylene glycol is 3 g/L. In addition, the carrier layer 1 is roughened by means of acid plating, wherein the plating solution for acid copper plating comprises a copper sulfate solution, wherein the copper content of the plating solution for acid copper plating is 13g/L, the acid content is 95g/L, and the molybdenum content is 700 PPM. Wherein, the first oxidation prevention layer is formed in a zinc-nickel alloy plating mode.
S52, forming a barrier layer 2 on one side of the carrier layer 1 by sputtering; specifically, a metal adhesive layer 22 is first formed on one side of the carrier layer 1 by sputtering, and a high temperature resistant layer 21 is formed on the metal adhesive layer 22 by sputtering. The metal bonding layer 22 is a structure formed by a copper metal layer and a nickel metal layer, the copper metal layer is connected with the carrier layer 1, and the nickel metal layer is connected with the high temperature resistant layer 21; the high temperature resistant layer 21 is a single-layer alloy structure made of tungsten-titanium alloy;
s53, forming a peeling layer 3 on the barrier layer 2 by sputtering; wherein the stripping layer 3 is a graphite layer;
s54, forming a metal foil layer 4 on the peeling layer 3; specifically, first, a third metal layer is sputtered on the peeling layer 3, and then a fourth metal layer is electroplated on the sputtered third metal layer, the third metal layer and the fourth metal layer constituting the metal foil layer. The metal foil layer 4 is a copper foil, the third metal layer and the fourth metal layer are both copper metal layers, and the sputtering conditions for sputtering the third metal layer on the peeling layer 3 are as follows: the current is preferably 9A, the voltage is preferably 400V, the vacuum degree is preferably 0.3Pa, the sputtering speed is preferably 7m/min, and the winding and unwinding tension is preferably 100N; in this embodiment, the plating solutions (including the plating solution for the first plating, the plating solution for the second plating, the plating solution for the third plating, and the plating solution for the fourth plating) for preparing the support layer 1 and the metal foil layer 4 are set to be the same.
S55, roughening the surface of the metal foil layer 4 away from the carrier layer 1, and forming a second anti-oxidation layer on the roughened surface of the metal foil layer 4 away from the carrier layer 1 by adopting an acid electroplating mode; wherein the copper content for the acidic copper plating solution is 13g/L, the acid content is 95g/L, and the molybdenum content is 600-800 PPM; in addition, the second oxidation preventing layer is formed in the form of a zinc-nickel alloy plating.
Example 2
This embodiment is different from embodiment 1 in that the high temperature resistant layer 21 has a single layer alloy structure made of a tungsten-nickel alloy. Other processes and steps of this embodiment are the same as those of embodiment 1, and will not be further described herein.
Example 3
This embodiment is different from embodiment 1 in that the high temperature resistant layer 21 has a single layer alloy structure made of a tungsten-molybdenum alloy. Other processes and steps of this embodiment are the same as those of embodiment 1, and will not be further described herein.
Example 4
This embodiment is different from embodiment 1 in that the high temperature resistant layer 21 has a single layer alloy structure made of a chromium-nickel alloy. Other processes and steps of this embodiment are the same as those of embodiment 1, and will not be further described herein.
Example 5
This embodiment is different from embodiment 1 in that the high temperature resistant layer 21 has a single layer alloy structure made of a zirconium-titanium alloy. Other processes and steps of this embodiment are the same as those of embodiment 1, and will not be further described herein.
Example 6
This embodiment is different from embodiment 1 in that the high temperature resistant layer 21 has a single layer alloy structure made of a titanium-nickel alloy. Other processes and steps of this embodiment are the same as those of embodiment 1, and will not be further described herein.
Example 7
This embodiment is different from embodiment 1 in that the high temperature resistant layer 21 has a single layer alloy structure made of a titanium-molybdenum alloy. Other processes and steps of this embodiment are the same as those of embodiment 1, and will not be further described herein.
Example 8
This embodiment is different from embodiment 1 in that the high temperature resistant layer 21 has a single layer alloy structure made of a titanium-cobalt alloy. Other processes and steps of this embodiment are the same as those of embodiment 1, and will not be further described herein.
Example 9
This embodiment is different from embodiment 1 in that the high temperature resistant layer 21 has a single layer alloy structure made of a nickel-molybdenum alloy. Other processes and steps of this embodiment are the same as those of embodiment 1, and will not be further described herein.
Example 10
This embodiment is different from embodiment 1 in that the high temperature resistant layer 21 has a single layer alloy structure made of a molybdenum-cobalt alloy. Other processes and steps of this embodiment are the same as those of embodiment 1, and will not be further described herein.
Example 11
The present embodiment is different from embodiment 1 in that the high temperature resistant layer 21 has a structure made of a tungsten metal layer and a graphite layer, the tungsten metal layer is connected to the metal bonding layer 22, and the graphite layer is connected to the peeling layer 3. Other processes and steps of this embodiment are the same as those of embodiment 1, and will not be further described herein.
Example 12
The present embodiment is different from embodiment 1 in that the high temperature resistant layer 21 has a structure made of a chromium metal layer and a graphite layer, the chromium metal layer is connected to the metal bonding layer 22, and the graphite layer is connected to the peeling layer 3. Other processes and steps of this embodiment are the same as those of embodiment 1, and will not be further described herein.
Example 13
The present embodiment is different from embodiment 1 in that the high temperature resistant layer 21 has a structure made of a nickel metal layer and a graphite layer, the nickel metal layer is connected to the metal bonding layer 22, and the graphite layer is connected to the peeling layer 3. Other processes and steps of this embodiment are the same as those of embodiment 1, and will not be further described herein.
Example 14
This embodiment is different from embodiment 1 in that the high temperature resistant layer 21 is a structure made of a tungsten-nickel alloy and a chromium metal layer, the tungsten-nickel alloy is connected to the metal bonding layer 22, and the chromium metal layer is connected to the peeling layer 3. Other processes and steps of this embodiment are the same as those of embodiment 1, and will not be further described herein.
Example 15
This embodiment is different from embodiment 1 in that the high temperature resistant layer 21 is a structure made of a nickel-molybdenum alloy and a chromium metal layer, the nickel-molybdenum alloy is connected to the metal bonding layer 22, and the chromium metal layer is connected to the peeling layer 3. Other processes and steps of this embodiment are the same as those of embodiment 1, and will not be further described herein.
Example 16
This embodiment is different from embodiment 1 in that the high temperature resistant layer 21 is a structure made of a molybdenum-cobalt alloy and a chromium metal layer, the molybdenum-cobalt alloy is connected to the metal bonding layer 22, and the chromium metal layer is connected to the peeling layer 3. Other processes and steps of this embodiment are the same as those of embodiment 1, and will not be further described herein.
Example 17
This embodiment is different from embodiment 1 in that the high temperature resistant layer 21 is a structure made of a titanium-nickel alloy and a chromium metal layer, the titanium-nickel alloy is connected to the metal bonding layer 22, and the chromium metal layer is connected to the peeling layer 3. Other processes and steps of this embodiment are the same as those of embodiment 1, and will not be further described herein.
Comparative example 1
This embodiment differs from embodiment 1 in that the barrier layer 2 is not produced after the carrier layer 1 is formed, but a release layer 3 is formed directly on the carrier layer 1. Other processes and steps of this embodiment are the same as those of embodiment 1, and will not be further described herein.
Comparative example 2
This embodiment is different from embodiment 1 in that the release layer 3 is formed directly on the metal adhesive layer 22 without forming the high temperature resistant layer 21 after forming the metal adhesive layer 22. Other processes and steps of this embodiment are the same as those of embodiment 1, and will not be further described herein.
Comparative example 3
This embodiment is different from embodiment 1 in that the metal adhesive layer 22 is not formed after the carrier layer 1 is formed, but the high temperature resistant layer 21 is directly formed on the carrier layer 1. Other processes and steps of this embodiment are the same as those of embodiment 1, and will not be further described herein.
Table 1 shows the diffusion depth from the carrier layer 1 to the metal foil layer 4 and the diffusion depth from the metal foil layer 4 to the carrier layer 1, which are measured as a result of a plurality of tests performed on the composite metal foils prepared in examples 1 to 17 directly under normal temperature conditions (for example, 16 to 27 ℃, 25 ℃), or a plurality of tests performed on the composite metal foils after being laminated with the flexible insulating base film at different temperatures (200 ℃ and 340 ℃), respectively, under normal temperature conditions.
TABLE 1
Since the carrier layer 1 and the metal foil layer 4 can diffuse into each other to a certain extent under high temperature conditions, and thus the carrier layer 1 and the metal foil layer 4 are bonded to each other to a certain extent, as can be seen from table 1, the diffusion depth of the carrier layer 1 to the metal foil layer 4 and the diffusion depth of the metal foil layer 4 to the carrier layer 1 increase with increasing temperature. The composite metal foils prepared in examples 1 to 17 had diffusion depths of the carrier layer 1 to the metal foil layer 4 and the metal foil layer 4 to the carrier layer 1 direction of less than 3 μm under normal or high temperature conditions, and therefore, when the adhesive coated metal foil with a carrier was used, the carrier layer 1 and the metal foil layer 4 were prevented from diffusing into each other at high temperature to cause adhesion, thereby allowing the carrier layer 1 and the metal foil layer 4 to be easily peeled. The composite metal foils prepared in comparative examples 1 and 2 were relatively severe in interdiffusion at high temperature, thus causing a large degree of adhesion of the carrier layer 1 to the metal foil layer 4, and thus causing inconvenience in simultaneously peeling the carrier layer 1, the barrier layer 2 and the peeling layer 3 from the metal foil layer 4 when the carrier-equipped adhesive metal foil is used; in addition, since the composite metal foil prepared in comparative example 3 is provided with the high temperature resistant layer 21, the diffusion depth from the support layer 1 to the metal foil layer 4 and the diffusion depth from the metal foil layer 4 to the support layer 1 are both less than 3 μm under high temperature conditions, but since the composite metal foil prepared in comparative example 3 is not provided with the metal adhesive layer 22, the diffusion thereof is more severe than that of the composite metal foils prepared in examples 1 to 17.
To sum up, the embodiment of the present invention provides a coated metal foil with a carrier and a method for manufacturing the same, wherein the coated metal foil with the carrier includes a composite metal foil and a glue film layer 5, the composite metal foil includes a carrier layer 1, a barrier layer 2, a peeling layer 3 and a metal foil layer 4, and the carrier layer 1, the barrier layer 2, the peeling layer 3 and the metal foil layer 4 are sequentially stacked; or the carrier layer 1, the peeling layer 3, the barrier layer 2 and the metal foil layer 4 are sequentially stacked; the adhesive film layer 5 is arranged on one side of the metal foil layer 4 far away from the carrier layer 1; at the temperature of 20-400 ℃, the diffusion depth from the carrier layer 1 to the metal foil layer 4 is less than or equal to 3 μm, and the diffusion depth from the metal foil layer 4 to the carrier layer 1 is less than or equal to 3 μm, wherein the carrier layer 1 is convenient to peel by arranging the peeling layer 3, and the carrier layer 1 and the metal foil layer 4 are prevented from being mutually diffused at high temperature to cause bonding by arranging the barrier layer 2, so that the carrier layer 1 and the metal foil layer 4 are easy to peel, and a relatively complete extremely thin metal foil layer 4 with less pinholes can be obtained, thereby being beneficial to the preparation of subsequent fine circuits.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.
Claims (17)
1. The adhesive coated metal foil with the carrier is characterized by comprising a composite metal foil and an adhesive film layer, wherein the composite metal foil comprises a carrier layer, a barrier layer, a stripping layer and a metal foil layer;
the carrier layer, the barrier layer, the peeling layer and the metal foil layer are sequentially stacked; or,
the carrier layer, the stripping layer, the barrier layer and the metal foil layer are sequentially stacked;
the adhesive film layer is arranged on one side of the metal foil layer far away from the carrier layer;
wherein, at the temperature of 20-400 ℃, the diffusion depth of the carrier layer to the metal foil layer is less than or equal to 3 μm, and the diffusion depth of the metal foil layer to the direction of the carrier layer is less than or equal to 3 μm.
2. A rubberized metal foil with carrier according to claim 1, wherein a diffusion depth of said carrier layer into said metal foil layer is less than or equal to 1 μm, and a diffusion depth of said metal foil layer into a direction of said carrier layer is less than or equal to 1 μm.
3. A rubberized metal foil with carrier according to claim 1, wherein said carrier layer, said release layer, said barrier layer and said metal foil layer are arranged one on top of the other, and a peel strength between said metal foil layer and said barrier layer is greater than a peel strength between said release layer and said barrier layer.
4. A rubberized metal foil with carrier according to claim 1, wherein said barrier layer comprises a high temperature resistant layer, said high temperature resistant layer being an organic high temperature resistant layer; or the high-temperature resistant layer is made of any one of tungsten, chromium, zirconium, titanium, nickel, molybdenum, cobalt and graphite.
5. A rubberized metal foil with a support according to claim 1, wherein said barrier layer comprises a high temperature resistant layer having a single layer alloy structure or a multilayer structure of a single metal layer or a multilayer structure of an alloy layer and a single metal layer.
6. A rubberized metal foil with carrier according to claim 4, wherein said carrier layer, said barrier layer, said release layer and said metal foil layer are arranged one on top of the other, said barrier layer further comprising a metal bonding layer, said metal bonding layer being arranged between said carrier layer and said high temperature resistant layer.
7. A rubberized metal foil with carrier according to claim 4, wherein said carrier layer, said release layer, said barrier layer and said metal foil layer are arranged one on top of the other, said barrier layer further comprising a metal adhesive layer, said metal adhesive layer being arranged between said high temperature resistant layer and said metal foil layer.
8. A carrier-carrying, rubberized metal foil according to claim 6 or 7, wherein said metallic bonding layer is made of any one of copper, zinc, nickel, iron and manganese.
9. A coated metal foil with carrier according to claim 6 or 7, wherein said metal bonding layer is a single layer alloy structure or a multilayer structure of a single metal layer or a multilayer structure of an alloy layer and a single metal layer.
10. The carrier-carrying rubberized metal foil according to any one of claims 1 to 7, wherein said peel-off layer is made of any one of nickel, silicon, molybdenum, graphite, titanium and niobium; or the stripping layer is made of an organic high molecular material.
11. The carrier-carrying rubberized metal foil according to any one of claims 1 to 7, wherein a thickness of the metal foil layer is less than or equal to 9 μm.
12. The carrier-carrying rubberized metal foil according to any one of claims 1 to 7, wherein the metal foil layer is a copper foil or an aluminum foil; and/or the carrier layer is carrier copper or carrier aluminum or an organic film.
13. A rubberized metal foil with carrier according to any one of claims 1 to 7, wherein a surface of said carrier layer adjacent to said metal foil layer has a roughness Rz of less than or equal to 5 μm; and/or the roughness Rz of the side of the metal foil layer facing away from the carrier layer is less than or equal to 3.0 μm.
14. A rubberized metal foil with carrier according to any one of claims 1 to 7, wherein a first oxidation preventing layer is provided on a side of said carrier layer adjacent to said barrier layer; and/or a second anti-oxidation layer is arranged on one side, far away from the barrier layer, of the metal foil layer.
15. The carrier-carrying rubberized metal foil according to any one of claims 1 to 7, wherein the adhesive film layer is a thermoplastic resin or a thermosetting resin; the thermoplastic resin comprises polystyrene, vinyl acetate, polyester, polyethylene, polyamide, rubber or acrylate thermoplastic resin, and the thermosetting resin comprises phenolic, epoxy, urethane, melamine or alkyd thermosetting resin.
16. The adhesive coated metal foil with carrier according to any one of claims 1 to 7, wherein said adhesive film layer has a thickness of 20 to 200 μm.
17. A wiring board obtained by using the carrier-equipped rubberized metal foil according to any one of claims 1 to 16.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822071755.7U CN209949554U (en) | 2018-12-10 | 2018-12-10 | Take rubber coating metal forming and circuit board of carrier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822071755.7U CN209949554U (en) | 2018-12-10 | 2018-12-10 | Take rubber coating metal forming and circuit board of carrier |
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| CN209949554U true CN209949554U (en) | 2020-01-14 |
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| CN201822071755.7U Active CN209949554U (en) | 2018-12-10 | 2018-12-10 | Take rubber coating metal forming and circuit board of carrier |
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