SECONDARY BATTERY AND MANUFACTURING METHOD

The present invention provides a technique for improving the performance of a secondary battery. The secondary battery (100) of the present embodiment comprises: a first electrode (21); a second electrode (22); a first layer (11) that is arranged on the first electrode (21), and that includes a first n-type oxide semiconductor; a second layer (12) that is arranged on the first layer (11), and that includes a second n-type oxide semiconductor material and a first insulation material; a third layer (13) that is arranged on the second layer (12), and that includes a tantalum oxide; and a fourth layer (14) that is arranged on the third layer (13), and that includes a second insulation material. 本发明提供了一种用于改善二次电池的性能的技术。本实施方式的二次电池(100)包括：第一电极(21)；第二电极(22)；第一层(11)，其设置在第一电极(21)上，并且包含第一n型氧化物半导体；第二层(12)，其设置在第一层上(11)，并且包含第二n型氧化物半导体材料和第一绝缘材料；第三层(13)，其设置在第二层(12)上，并且包含氧化钽；以及第四层(14)，其设置在第三层(13)上，并且包含第二绝缘材料。