Display device and manufacturing method thereof

The invention relates to a display device and a manufacturing method thereof. Disclosed is a display device in which, in each sub-pixel, a cathode electrode layer and a power connection line are electrically connected to each other at an undercut portion via a structure providing an undercut such that power is stably supplied to each of a plurality of sub-pixels via the power connection line electrically connected to a power line. 本申请涉及显示装置及其制造方法。公开一种显示装置，其中在每个子像素中，阴极电极层和电力连接线在底切部处经由提供底切的结构彼此电连接，使得电力经由电连接到电力线的电力连接线稳定地供应至多个子像素中的每一个。