Fingerprint sensor and electronic device including same

The utility model discloses a fingerprint sensor and an electronic device comprising the same. The fingerprint sensor in one embodiment comprises a substrate layer; an electrode layer that is disposed above the base layer, contains a heat-shrinkable material having a negative coefficient of thermal expansion and a conductive material, and has a first coefficient of thermal expansion; a base substrate disposed above the electrode layer and having a second coefficient of thermal expansion; and a piezoelectric element layer disposed between the electrode layer and the base substrate, the piezoelectric element layer having a condition in which the ratio of the first coefficient of thermal expansion to the second coefficient of thermal expansion is 0.8: 1 to 2: 1, thereby improving a bending phenomenon of the fingerprint sensor according to a temperature change. 本实用新型公开了一种指纹传感器以及包括其的电子装置，一实施例的指纹传感器包括：基底层；电极层，配置于基底层的上方，并包含具有负的热膨胀系数的热收缩材料以及传导性材料，并且具有第一热膨胀系数；基底基板，配置于电极层的上方，并具有第二热膨胀系数；以及压电元件层，配置于电极层与基底基板之间，通过具有第一热膨胀系数