JP5661051B2 - 片面金属張積層体の製造方法 - Google Patents
片面金属張積層体の製造方法 Download PDFInfo
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- JP5661051B2 JP5661051B2 JP2011551922A JP2011551922A JP5661051B2 JP 5661051 B2 JP5661051 B2 JP 5661051B2 JP 2011551922 A JP2011551922 A JP 2011551922A JP 2011551922 A JP2011551922 A JP 2011551922A JP 5661051 B2 JP5661051 B2 JP 5661051B2
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- 238000004519 manufacturing process Methods 0.000 title claims description 26
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- 229910052751 metal Inorganic materials 0.000 claims description 55
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 34
- 238000000926 separation method Methods 0.000 claims description 30
- 239000011889 copper foil Substances 0.000 claims description 21
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- QYIMZXITLDTULQ-UHFFFAOYSA-N 4-(4-amino-2-methylphenyl)-3-methylaniline Chemical group CC1=CC(N)=CC=C1C1=CC=C(N)C=C1C QYIMZXITLDTULQ-UHFFFAOYSA-N 0.000 description 1
- KHYXYOGWAIYVBD-UHFFFAOYSA-N 4-(4-propylphenoxy)aniline Chemical compound C1=CC(CCC)=CC=C1OC1=CC=C(N)C=C1 KHYXYOGWAIYVBD-UHFFFAOYSA-N 0.000 description 1
- HLBLWEWZXPIGSM-UHFFFAOYSA-N 4-Aminophenyl ether Chemical compound C1=CC(N)=CC=C1OC1=CC=C(N)C=C1 HLBLWEWZXPIGSM-UHFFFAOYSA-N 0.000 description 1
- WUPRYUDHUFLKFL-UHFFFAOYSA-N 4-[3-(4-aminophenoxy)phenoxy]aniline Chemical compound C1=CC(N)=CC=C1OC1=CC=CC(OC=2C=CC(N)=CC=2)=C1 WUPRYUDHUFLKFL-UHFFFAOYSA-N 0.000 description 1
- JCRRFJIVUPSNTA-UHFFFAOYSA-N 4-[4-(4-aminophenoxy)phenoxy]aniline Chemical compound C1=CC(N)=CC=C1OC(C=C1)=CC=C1OC1=CC=C(N)C=C1 JCRRFJIVUPSNTA-UHFFFAOYSA-N 0.000 description 1
- ZNVDOKOOMPHOSP-UHFFFAOYSA-N 4-amino-n-(4-amino-2-methoxyphenyl)benzamide Chemical compound COC1=CC(N)=CC=C1NC(=O)C1=CC=C(N)C=C1 ZNVDOKOOMPHOSP-UHFFFAOYSA-N 0.000 description 1
- XPAQFJJCWGSXGJ-UHFFFAOYSA-N 4-amino-n-(4-aminophenyl)benzamide Chemical compound C1=CC(N)=CC=C1NC(=O)C1=CC=C(N)C=C1 XPAQFJJCWGSXGJ-UHFFFAOYSA-N 0.000 description 1
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- KAUQJMHLAFIZDU-UHFFFAOYSA-N 6-Hydroxy-2-naphthoic acid Chemical compound C1=C(O)C=CC2=CC(C(=O)O)=CC=C21 KAUQJMHLAFIZDU-UHFFFAOYSA-N 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
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- 239000004696 Poly ether ether ketone Substances 0.000 description 1
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- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
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- 125000006297 carbonyl amino group Chemical group [H]N([*:2])C([*:1])=O 0.000 description 1
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- 239000011737 fluorine Substances 0.000 description 1
- ANSXAPJVJOKRDJ-UHFFFAOYSA-N furo[3,4-f][2]benzofuran-1,3,5,7-tetrone Chemical compound C1=C2C(=O)OC(=O)C2=CC2=C1C(=O)OC2=O ANSXAPJVJOKRDJ-UHFFFAOYSA-N 0.000 description 1
- 108010025899 gelatin film Proteins 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 150000002430 hydrocarbons Chemical group 0.000 description 1
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- 229910052759 nickel Inorganic materials 0.000 description 1
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- 230000009467 reduction Effects 0.000 description 1
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- 229920002050 silicone resin Polymers 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
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- 229910052720 vanadium Inorganic materials 0.000 description 1
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
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
- B32B37/16—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating
- B32B37/22—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating involving the assembly of both discrete and continuous layers
- B32B37/223—One or more of the layers being plastic
- B32B37/226—Laminating sheets, panels or inserts between two continuous plastic layers
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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
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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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
- B32B15/00—Layered products comprising a layer of metal
- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
-
- 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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/16—Layered products comprising a layer of synthetic resin specially treated, e.g. irradiated
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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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
- B32B27/281—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polyimides
-
- 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
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/02—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by a sequence of laminating steps, e.g. by adding new layers at consecutive laminating stations
- B32B37/025—Transfer laminating
-
- 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
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- 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
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/02—Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding
- H05K3/022—Processes for manufacturing precursors of printed circuits, i.e. copper-clad substrates
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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
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/538—Roughness
-
- 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
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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
- B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
- B32B2309/02—Temperature
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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
- B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
- B32B2309/04—Time
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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
- B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
- B32B2309/08—Dimensions, e.g. volume
- B32B2309/10—Dimensions, e.g. volume linear, e.g. length, distance, width
- B32B2309/105—Thickness
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2311/00—Metals, their alloys or their compounds
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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
- B32B2457/00—Electrical equipment
- B32B2457/08—PCBs, i.e. printed circuit boards
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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
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/0007—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding involving treatment or provisions in order to avoid deformation or air inclusion, e.g. to improve surface quality
- B32B37/0015—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding involving treatment or provisions in order to avoid deformation or air inclusion, e.g. to improve surface quality to avoid warp or curl
-
- 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
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/15—Position of the PCB during processing
- H05K2203/1536—Temporarily stacked PCBs
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Laminated Bodies (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Description
(1)熱可塑性樹脂からなる接着面を有した絶縁性フィルム(A)に金属箔(B)が接着されたフレキシブル回路基板用の片面金属張積層体をロールトゥロール方式で製造する方法であって、
表裏両面がいずれも表面粗さ(Rz)2.0μm以下である離間フィルム(C)を用いて、一対の加圧ロール(r1、r2)間で(r1)/(B)/(A)/(C)/(A)/(B)/(r2)の順となるように、絶縁性フィルム(A)、金属箔(B)、及び離間フィルム(C)を重ねて熱圧着し、離間フィルム(C)から剥離して2つの片面金属張積層体を得ることを特徴とする片面金属張積層体の製造方法。
(2)絶縁性フィルム(A)が、熱可塑性液晶ポリマーフィルム、又は、少なくとも一方の面に熱可塑性樹脂層を備えると共に、該熱可塑性樹脂層よりも高い熱変形温度を有する耐熱性樹脂フィルムからなる(1)に記載の片面金属張積層体の製造方法。
(3)離間フィルム(C)が、アルミニウム箔、熱圧着温度に耐える耐熱性を有する耐熱性樹脂フィルム、又は、樹脂フィルムの表裏面に金属箔を有した複合フィルムからなる(1)又は(2)に記載の片面金属張積層体の製造方法。
(4)離間フィルム(C)の片面もしくは両面が離型処理されている(1)〜(3)のいずれかに記載の片面金属張積層体の製造方法。
(5)金属箔(B)が、厚さ1〜100μmの銅箔である(1)〜(4)のいずれかに記載の片面金属張積層体の製造方法。
(6)熱圧着後の絶縁性フィルム(A)と離間フィルム(C)との層間剥離強度が、0.1kN/m以下である(1)〜(5)のいずれかに記載の片面金属張積層体の製造方法。
本発明では、一対の加圧ロール(r1、r2)間で、金属箔(B)/絶縁性フィルム(A)/離間フィルム(C)/絶縁性フィルム(A)/金属箔(B)の順となるように重ねて熱圧着し、離間フィルム(C)から剥離して、絶縁性フィルム(A)に金属箔(B)が接着された2つの片面金属張積層体を同時に製造する。
(1)芳香族又は脂肪族ジヒドロキシ化合物
(2)芳香族又は脂肪族ジカルボン酸
(3)芳香族ヒドロキシカルボン酸
(4)芳香族ジアミン、芳香族ヒドロキシアミン又は芳香族アミノカルボン酸
JIS B 0601に準じて、触針式表面粗さ測定器(TENCOR社製、TENCOR P−10)を使用して、荷重100μN、走査速度20μm/秒、測定距離800μmの条件でRz(十点平均粗さ)を測定した。
熱圧着後に離間フィルム(C)を含んだ積層物(B/A/C/A/B)を、加圧ロールの長さ方向に幅10mm、ラミネート進行方向(MD方向)に長さ150mmに切り出した短冊状の剥離性試験片を用意し、絶縁フィルム(A)と離間フィルム(C)との層間剥離性をJIS K 6854−3(T型はく離)に準じて測定した。この際の剥離速度は100mm/分とした。
得られた片面銅張積層体をラミネート進行方向(MD方向)に長さ150mmに切り出し、市販のエッチング液(アデカケルミカFE−210、株式会社ADEKA製)を用いたサブトラクティブ法により、銅箔をエッチングして、ラミネート進行方向に沿って、幅1mm、長さ100mmの直線導体パターン7を形成した(図3)。この際、直線導体パターン7は、片面金属張積層体の幅方向(加圧ロールの長さ方向)の中央の位置、中央から幅方向左右にそれぞれ30mm離れた位置の3箇所に形成して、密着性試験片とした。この密着性試験片の3本の直線導体パターンについて、絶縁フィルム(A)から剥離する強度をJIS C 6471 8.1 方法B(180°方向引き剥がし)に準じて測定した。そして、3本の剥離強度の平均値が1.0kN/m以上の場合を良好とし、0.5kN/m以上1.0kN/m未満の場合を可とし、0.5kN/m未満の場合を不良とする3段階で「密着性」を評価した。また、3本の剥離強度のうちの最大値と最小値との差を「密着性のばらつき」として評価した。
絶縁性フィルム(A)として、厚さ50μm、幅70mmの液晶ポリマーフィルム1(融点320℃)がロール状に巻かれた長尺フィルムを準備し、金属箔(B)として、厚さ12μm、幅70mmの市販の電解銅箔2(表面粗さRz:絶縁性フィルム積層面1.6μm、露出面1.4μm)がロール状に巻かれた長尺銅箔を準備し、離間フィルム(C)として、厚さ50μm、幅70mmのアルミニウム箔3(表裏ともに表面粗さRz:1.2μm)がロール状に巻かれた長尺アルミ箔を準備した。これらを図1に示すように、絶縁性フィルム繰出しロールA、金属箔繰出しロールB、離間フィルム繰出しロールCにそれぞれセットし、一対の加圧ロール4(r1、r2)の間に、“電解銅箔2/液晶ポリマーフィルム1/アルミニウム箔3/液晶ポリマーフィルム1/電解銅箔2”の順で重なるように供給し(図2)、熱圧着後に自然冷却して、剥離ロール6によりアルミニウム箔3と液晶ポリマーフィルム1とを層間剥離し、アルミニウム箔3は離間フィルム巻取りロールC’で回収し、液晶ポリマーフィルム1と電解銅箔2とが貼り合わされた片面銅張積層体5は、2箇所に設置した製品巻取りロールxでそれぞれ回収するようにした。
離間フィルム(C)として、厚さ50μmの非熱可塑性である市販の耐熱性ポリイミドフィルム3(Tg:340℃、表裏ともに表面粗さRz:0.9μm)を用いた以外は実施例1と同様にして、実施例2に係る片面銅張積層体を得た。
離間フィルム(C)として、両面銅張積層体(新日鐵化学社製 エスパネックスMシリーズ(MB12−25−12CEG))を用いた以外は実施例1と同様にして、実施例3に係る片面銅張積層体を得た。この両面銅張積層体は、中心に絶縁層として厚さ25μmのポリイミド樹脂を有し、その両面に厚さ12μmの銅箔がそれぞれ設けられており、銅箔の露出面の表面粗さ(Rz)はいずれも1.0μmである。
離間フィルム(C)として、厚さ25μmであって、表裏面に熱可塑性ポリイミドを有した複合ポリイミドフィルムを用いるようにした以外は、実施例1と同様にして、比較例1に係る片面銅張積層体を得た。この複合ポリイミドフィルムは、約21μmの非熱可塑性ポリイミドの両側に約2μmの熱可塑性ポリイミドが設けられたものであり、熱可塑性ポリイミドからなる表裏面の表面粗さ(Rz)は2.3μmであった。
離間フィルム(C)を使わずに、それ以外は実施例1と同様にして、比較例2に係る片面銅張積層体を製造したところ、熱圧着して冷却した後に、片面銅張積層体を分離しようとしたが、絶縁性フィルム(A)として用いた液晶ポリマーフィルム1同士が熱融着してしまい、剥離性試験片を採取した測定では0.70kN/mであって凝集破壊が確認された。そして、得られた片面銅張積層体は、目視にて液晶ポリマーフィルムの表面全体に凝集破壊による荒れが確認され、外観が良好な片面銅張積層体を得ることは出来なかった。
一対の加圧ロール4の間で“電解銅箔2/液晶ポリマーフィルム1/アルミニウム箔3”の順となるように重ねて、これ以外は実施例1と同様にして、比較例3に係る片面銅張積層体を製造した。
一対の加圧ロール4の間で“アルミニウム箔3/電解銅箔2/液晶ポリマーフィルム1/アルミニウム箔3”の順となるように重ねて、これ以外は実施例1と同様にして、比較例4に係る片面銅張積層体を製造した。
2:電解銅箔(金属箔(B))
3:アルミニウム箔(離間フィルム(C))
4:加圧ロール
5:片面銅張積層体
6:剥離ロール
7:直線導体パターン
Claims (6)
- 熱可塑性樹脂からなる接着面を有した絶縁性フィルム(A)に金属箔(B)が接着されたフレキシブル回路基板用の片面金属張積層体をロールトゥロール方式で製造する方法であって、
表裏両面がいずれも表面粗さ(Rz)2.0μm以下である離間フィルム(C)を用いて、一対の加圧ロール(r1、r2)間で(r1)/(B)/(A)/(C)/(A)/(B)/(r2)の順となるように、絶縁性フィルム(A)、金属箔(B)、及び離間フィルム(C)を重ねて熱圧着し、離間フィルム(C)から剥離して2つの片面金属張積層体を得ることを特徴とする片面金属張積層体の製造方法。 - 絶縁性フィルム(A)が、熱可塑性液晶ポリマーフィルム、又は、少なくとも一方の面に熱可塑性樹脂層を備えると共に、該熱可塑性樹脂層よりも高い熱変形温度を有する耐熱性樹脂フィルムからなる請求項1に記載の片面金属張積層体の製造方法。
- 離間フィルム(C)が、アルミニウム箔、熱圧着温度に耐える耐熱性を有する耐熱性樹脂フィルム、又は、樹脂フィルムの表裏面に金属箔を有した複合フィルムからなる請求項1又は2に記載の片面金属張積層体の製造方法。
- 離間フィルム(C)の片面もしくは両面が離型処理されている請求項1〜3のいずれかに記載の片面金属張積層体の製造方法。
- 金属箔(B)が、厚さ1〜100μmの銅箔である請求項1〜4のいずれかに記載の片面金属張積層体の製造方法。
- 熱圧着後の絶縁性フィルム(A)と離間フィルム(C)との層間剥離強度が、0.1kN/m以下である請求項1〜5のいずれかに記載の片面金属張積層体の製造方法。
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