Display device with a rib having a partition with a conductive portion and manufacturing method thereof
AssigneeMagnolia White Corporation
InventorKaichi Fukuda
Life of this patent
Estimating the term…
Abstract
According to one embodiment, a display device includes a lower electrode, a rib including a pixel aperture, a partition on the rib, an upper electrode, and an organic layer between the lower electrode and the upper electrode. The partition includes a conductive first portion, a conductive second portion which is provided on the first portion and is in contact with the upper electrode, and a third portion provided on the second portion. A lower end of the second portion protrudes in a width direction of the partition relative to the first portion. The third portion protrudes in the width direction relative to an upper end of the second portion.
Claims13
A display device comprising:
- a lower electrode;
- a rib comprising a pixel aperture overlapping the lower electrode;
- a partition provided on the rib;
- an upper electrode facing the lower electrode;
- and
- an organic layer which is located between the lower electrode and the upper electrode and emits light based on a potential difference between the lower electrode and the upper electrode, wherein
- the partition comprises:
- a conductive first portion provided on the rib;
- a conductive second portion which is provided on the first portion and is in contact with the upper electrode;
- and
- a third portion provided on the second portion,
- a lower end of the second portion protrudes in a width direction of the partition relative to the first portion,
- the third portion protrudes in the width direction relative to an upper end of the second portion, and
- the second portion is thicker than the first portion and the third portion,
- wherein a thickness (T1) of the first portion, a protrusion length (D1) of the lower end of the second portion from the first portion, and a protrusion length (D2) of the third portion from the upper end of the second portion satisfy D1≥2×T1 and D1≥D2.
A manufacturing method of a display device, including:
- forming a lower electrode;
- forming a rib which covers at least part of the lower electrode;
- forming a partition on the rib, the partition comprising a conductive first portion, a conductive second portion provided on the first portion and a third portion provided on the second portion, the second portion comprising a lower end protruding in a width direction relative to the first portion, the third portion protruding in the width direction relative to an upper end of the second portion;
- forming an organic layer which covers the lower electrode through a pixel aperture provided in the rib;
- and
- forming an upper electrode which covers the organic layer and is in contact with the second portion, wherein
- forming the partition includes:
- forming a first layer which is a base of the first portion;
- forming a second layer which is a base of the second portion on the first layer;
- forming a third layer which is a base of the third portion on the second layer;
- providing a resist on the third layer;
- and
- forming the first portion, the second portion and the third portion by etching to remove, of the first layer, the second layer and the third layer, a portion exposed from the resist to and reduce widths of the first layer and the second layer, such that a thickness (T1) of the first portion, a protrusion length (D1) of the lower end of the second portion from the first portion, and a protrusion length (D2) of the third portion from the upper end of the second portion satisfy D1≥2×T1 and D1≥D2.
Dependencies are inferred from the claim text.