| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a printed circuit board for a strain gage which can measure strain quantity with minimized error and in which the conductive pattern is unlikely to peel off the base film.SOLUTION: The present invention relates to a printed circuit board for a strain gage, which comprises: a base film mainly consisting of a fluorine resin; and a conductive pattern stacked on a surface of the base film and comprising a strain sensing part, the base film having a modification layer in a region of the surface thereof where at least the conductive pattern exists, and the modification layer including siloxane bonds and hydrophilic organic functional groups. The contact angle of the surface of the base film with pure water is preferably 90° or less. The average thickness of the modification layer is preferably 400 nm or less. Further, the hydrophilic organic functional group is preferably hydroxyl group, carboxyl group, carbonyl group, amino group, amide group, sulfide group, sulfonyl group, sulfo group, sulfonyl dioxy group, epoxy group, methacryl group, or mercapto group.</p> |
