Abstract: There is provided a secondary battery where the occurrence of adverse effects due to folds of a continuously folded separator is reduced. A secondary battery includes a plurality of sheet-like positive electrodes, a plurality of sheet-like negative electrodes, and a belt-like separator placed between the positive electrodes and the negative electrodes. The positive electrodes and the negative electrodes are alternately stacked with the separator interposed therebetween. The separator is continuously folded to be interposed between the positive electrodes and the negative electrodes. Folds of the continuously folded separator are at least a specified distance away from ends of the negative electrodes.

Abstract: There is provided a secondary battery where the occurrence of adverse effects due to folds of a continuously folded separator is reduced. A secondary battery (1) includes a plurality of sheet-like positive electrodes (100), a plurality of sheet-like negative electrodes (200), and a belt-like separator (300) placed between the positive electrodes (100) and the negative electrodes (200). The positive electrodes (100) and the negative electrodes (200) are alternately stacked with the separator (300) interposed therebetween. The separator (300) is continuously folded to be interposed between the positive electrodes (100) and the negative electrodes (200). Folds of the continuously folded separator (300) are at least a specified distance away from ends of the negative electrodes (200).

Abstract: In order to solve the above problem, provided is an electronic component having an authentication pattern formed on an exposed surface, in which the authentication pattern includes a base section including a resin and colored particles having a hue that can be identified in the base section, and the colored particles are dispersed so as to form dotted pattern in the base section.

Abstract: There is provided an authentication device including an authentication information storage unit that stores authentication information acquired from an authentication pattern including a part or the entirety of a mottled pattern or a dot pattern formed over an electronic component as information for indentifying each of a plurality of electronic components, an authentication information acquiring unit that acquires a first authentication information acquired from the authentication pattern formed over a first electronic component that is an object to be authenticated, a search unit that searches whether or not the authentication information storage unit stores the first authentication information by using the first authentication information as a search key, and an output unit that outputs a search result of the search unit.

Abstract: In order to solve the above problem, provided is an electronic component having an authentication pattern formed on an exposed surface, in which the authentication pattern includes a base section including a resin and colored particles having a hue that can be identified in the base section, and the colored particles are dispersed so as to form dotted pattern in the base section.