PROBLEM TO BE SOLVED: To provide a flexible circuit board for a living body with a protective layer which has a small number of components, is not stuck to skin without coming into contact even when a living body surface is touched, has no risk of damaging the skin and causes no discomfort due to stickiness of an adhesive or the like.SOLUTION: The flexible circuit board for a living body with a protective layer includes a detection part 11 attached to a living body to detect a signal generated from the living body, and a flat cable 31 for extracting the signal detected by the detection part 11 to the outside. Foamed protective layers 51, 53 are formed on both front and back surfaces of the flat cable 31. The foamed protective layers 51, 53 are configured by thermally expanding a foaming agent scattered in coating paste to form hollows by heating the coated resin coating paste.COPYRIGHT: (C)2014,JPO&INPIT【課題】部品点数が少なく、生体表面に接触しても皮膚に密着せず張り付かず、また皮膚を傷つける恐れもなく、接着剤等のべたつきによる不快感も生じない保護層付き生体用フレキシブル回路基板を提供する。【解決手段】生体に取り付けて生体から生じる信号を検出する検出部11と、検出部11で検出した信号を外部に引き出すフラットケーブル31とを具備する。フラットケーブル31の表裏両面に発泡保護層51,53を形成する。発泡保護層51,53は塗布された樹脂製の塗布ペーストを加熱することでこの塗布ペースト中に分散されている発泡剤を熱膨張させて中空を形成することで構成される。【選択図】図1
