RESIN LAMINATE, METAL-CLAD LAMINATE AND CIRCUIT BOARD

• Main Authors: ANDO TOMONORI, ANDO SHINGO, SUDO YOSHIKI
• Format: Patent
• Language: English; Japanese
• Published: 11.04.2024
• Subjects: CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS; PERFORMING OPERATIONS; PRINTED CIRCUITS; TRANSPORTING

To achieve both of excellent dielectric property and flame retardancy in a resin laminate using aliphatic thermoplastic resin.SOLUTION: Disclosed is a resin laminate in which a first insulation resin layer, an adhesion layer and a second insulation resin layer are laminated in this order. In the resin laminate, total thickness T1 is in a range of 70 to 500 μm, and an adhesion layer thickness T2 is more than 50 μm. The VTM burning time t in a vertical flame test of UL94 thin material is 10 sec. or less, and the flame retardancy parameter x represented by x=A/[B+(2×C)+D+(2×E)] is in the range of more than 0 but 2.4 or less. In the above formula, A is a total amount of aliphatic skeleton derived from dimer acid type diamine in the adhesion layer; B is a total amount of phenyl skeleton in the thickness range from the border between the skeleton and the adhesion layer to 2.5 μm, respectively toward the first and second insulation resin layer sides; C is a total amount of biphenyl skeleton in the same thickness range; D is a total amount of phenyl skeleton in the adhesion layer; E is a total amount of biphenyl skeleton in the adhesion layer; and units are [g], respectively.SELECTED DRAWING: Figure 1 【課題】脂肪族系熱可塑性樹脂を使用した樹脂積層体において、優れた誘電特性と難燃性との両立を図る。【解決手段】第１の絶縁樹脂層と接着層と第２の絶縁樹脂層とがこの順に積層されている樹脂積層体であって、合計厚みＴ１が７０～５００μｍの範囲内であり、かつ、接着層の厚みＴ２が５０μｍより大きく、ＵＬ９４薄手材料垂直燃焼試験におけるＶＴＭ燃焼時間ｔが１０秒以下であり、下記式で表される難燃性パラメータｘが０を超え２．４以下の範囲内である。ｘ＝Ａ／［Ｂ＋（２×Ｃ）＋Ｄ＋（２×Ｅ）］であり、Ａ：接着層中のダイマー酸型ジアミン由来の脂肪族骨格の合計量、Ｂ：接着層との境界から第１及び第２の絶縁樹脂層側へそれぞれ２．５μｍまでの厚み範囲のフェニル骨格の合計量、Ｃ：同厚み範囲のビフェニル骨格の合計量、Ｄ：接着層中のフェニル骨格の合計量、Ｅ：接着層中のビフェニル骨格の合計量を意味し、単位はそれぞれ［ｇ］である。【選択図】図１