US 12,720,977 B2Granted

Display device and tiled display device with contact hole for receiving fan-out lines

AssigneeSamsung Display Co., Ltd.

InventorsSoo Youn Kim, Seung Hun Kim, Seung Yong Song, Hee Jun Yang, Kwan Hyuck Yoon, Seung Ho Yoon, Moon Won Chang, Se Hoon Jeong

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Abstract

A display device includes a first substrate including a first contact hole, fan-out lines in a first metal layer, a second substrate on the first metal layer and including a second contact hole, connection lines in a second metal layer and into the second contact hole connected to the fan-out lines, a thin film transistor in an active layer and a third metal layer on the second metal layer, and a flexible film on a surface of the first substrate and into the first contact hole connected to the fan-out lines. An etching angle of the first contact hole between a top surface of the first substrate and an inner surface of the first contact hole is less than an etching angle of the second contact hole between top surfaces of the fan-out lines and an inner surface of the second contact hole.

Claims12

Dependent claims

A display device comprising:

a first substrate comprising a first contact hole;
an insulating layer on a top surface of the first substrate, the insulating layer having a second contact hole connected to the first contact hole;
fan-out lines disposed in a first metal layer on the insulating layer, wherein the second contact hole receives a bottom surface of a fan-out line among the fan-out lines;
a second substrate disposed on the first metal layer and comprising a third contact hole;
connection lines disposed in a second metal layer on the second substrate, the connection lines electrically connected to the fan-out lines through the third contact hole, respectively;
a thin film transistor disposed in an active layer and a third metal layer disposed on the second metal layer;
and
at least one flexible film disposed on a bottom surface of the first substrate, the at least one flexible film electrically connected to the fan-out lines through the first contact hole,
wherein a first angle between the top surface of the first substrate and an inner surface of the first contact hole is less than a third angle between the fan-out line and an inner surface of the third contact hole, and
wherein a second angle between the top surface of the first substrate and an inner surface of the second contact hole is less than the third angle.

7 more elements

Dependencies are inferred from the claim text.