Display device and manufacturing method thereof

A manufacturing method of a display device, including:

• forming a lower electrode;
• forming a rib which covers at least part of the lower electrode;
• and
• forming a partition on the rib, the partition including a conductive bottom portion, a stem portion located on the bottom portion and a top portion located on the stem portion, wherein
• the forming the partition includes:
• forming a conductive first layer;
• forming a second layer on the first layer;
• forming a third layer on the second layer;
• forming a resist on the third layer;
• forming the top portion by removing a portion of the third layer exposed from the resist;
• removing a portion of the second layer exposed from the top portion;
• decreasing a width of the second layer which remains under the top portion to a first width which is less than a width of the top portion;
• forming the bottom portion by removing a portion of the first layer exposed from the second layer and having the first width;
• and
• forming the stem portion by decreasing the width of the second layer to a second width which is less than a width of the bottom portion after forming the bottom portion.