ELECTROMAGNETIC WAVE SHIELDING SHEET, PRINTED CIRCUIT BOARD, AND ELECTRONIC EQUIPMENT

• Main Authors: MORI SHOTA, KUMAGAI SHIORI
• Format: Patent
• Language: English; Japanese
• Published: 21.05.2024
• Subjects: CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; 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; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PRINTED CIRCUITS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING

To provide an electromagnetic wave shielding sheet, a printed circuit board, and electronic equipment, each having high blocking resistance, excellent scratch resistance and excellent dust resistance.SOLUTION: An electromagnetic wave shielding sheet of the present disclosure, is an electromagnetic wave shielding sheet in which a shield layer (B) is arranged only on one surface side of a protection layer (A), and in which the protection layer (A) after heated for 30 mins at 170°C satisfies that (1) a dynamic friction coefficient is 0.01 to 0.9, (2) a pencil hardness obtained in accordance with JIS K 5600 is HB to 9H, and (3) height of a protruded peak portion on a front surface opposite to the side in which the shield layer (B) of the protection layer (A) is arranged, is 0.001 or more and less than 10 μm, the height of the protruded peak portion being obtained in accordance with ISO 25178-2:2012.SELECTED DRAWING: Figure 1 【課題】ブロッキング耐性が高く、優れた耐裂傷性と防塵性を兼ね備える電磁波シールドシート、プリント配線板、並びに電子機器を提供する。【解決手段】本開示の電磁波シールドシートは、保護層（Ａ）の一方の面側にのみ、シールド層（Ｂ）、が配置された電磁波シールドシートであって、１７０℃３０分で加熱後の保護層（Ａ）が、（１）動摩擦係数が０．０１～０．９である、（２）ＪＩＳ Ｋ ５６００に準拠して求めた鉛筆硬度がＨＢ～９Ｈである、（３）保護層（Ａ）のシールド層（Ｂ）が配置された側とは反対表面における、ＩＳＯ ２５１７８－２：２０１２に準拠して求めた突出山部高さ（Ｓｐｋ）が０．００１以上、１０μｍ未満である、ことを満たす。【選択図】図１