Display device and method for manufacturing the display device

摘要

It is an object of the present invention to provide a technology for manufacturing a highly reliable display device at a low cost with high yield. In the present invention, a spacer is formed over a pixel electrode, thereby protecting the pixel electrode layer from a mask in formation of an electroluminescent layer. In addition, since a layer that includes an organic material that has water permeability is sealed in a display device with a sealing material and the sealing material and the layer that includes the organic material are not in contact, deterioration of a light-emitting element due to a contaminant such as water can be prevented. The sealing material is formed in a portion of a driver circuit region in the display device, and thus, the narrower frame margin of the display device can also be accomplished.

主权项

1. A display device comprising a cross sectional structure, the cross sectional structure comprising:
a first substrate; a thin film transistor over the first substrate; a first insulating layer over the thin film transistor; a first conductive layer over the first insulating layer, wherein the first conductive layer is electrically connected to the thin film transistor; a second insulating layer over the first conductive layer; a pixel electrode over the second insulating layer, the pixel electrode being electrically connected to the thin film transistor; a third insulating layer over a part of the pixel electrode; a light emitting layer comprising an organic compound over the pixel electrode, wherein a part of the light emitting layer is formed over the third insulating layer; a second electrode over the light emitting layer and the third insulating layer, wherein the pixel electrode is overlapped with the second electrode with the light emitting layer therebetween; a second substrate over the second electrode, the second substrate being fixed to the first substrate with a sealing material therebetween, wherein the first substrate includes a portion which extends beyond a side edge of the second substrate and is not covered by the second substrate; a fourth insulating layer over the portion of the first substrate, wherein the fourth insulating layer comprises a same organic material as the second insulating layer; a fifth insulating layer over the portion of the first substrate, the fifth insulating layer being formed over the fourth insulating layer, wherein the fifth insulating layer comprises a same organic material as the third insulating layer; and a driver circuit over the first substrate, wherein a space is provided between the driver circuit and the sealing material.