Polymeric piezoelectric material, layered body, method of manufacturing polymeric piezoelectric material, and method of manufacturing layered body

A polymeric piezoelectric material, comprising at least two regions, the at least two regions comprising:

• a region H, which is an oriented polymeric piezoelectric region that includes an optically active helical chiral polymer (A) having a weight average molecular weight of from 50,000 to 1,000,000, the region H having a crystallinity obtained by a DSC method of from 20% to 80% and having a standardized molecular orientation measured by a microwave transmission-type molecular orientation meter based on a reference thickness of 50 μm of from 3.5 to 15.0;
• and
• a region L, which is a low orientation region that includes the optically active helical chiral polymer (A) having a weight average molecular weight of from 50,000 to 1,000,000, the region L being present near at least part of an end portion of the region H, having an average width when viewed from a normal direction with respect to the principal plane of the region H of from 10 μm to 300 μm, and having a retardation is 100 nm or less.