Display apparatus and manufacturing method of display apparatus
View Patent ↗A portion of a protective layer located above a connection portion is removed to expose the connection portion which is formed of the same material as used for a data line DL in this removed portion. Then, a transparent conductive layer made of ITO is further formed on these films. The transparent conductive layer and a bump are then connected via an AFC.
1. An active matrix display apparatus having a Chip On Glass COG terminal portion for directly connecting with a separate semiconductor integrated circuit in a peripheral portion, wherein the COG terminal portion includes:
a connection portion which is formed of a conductor including a layer of aluminum or an aluminum alloy and which is disposed in the peripheral portion;
a line protective film which covers the connection portion;
an opening portion which is formed in the line protective film at a location corresponding to a terminal portion; and
a transparent conductive layer which covers a surface of the connection portion in the opening portion.
2. A display apparatus according to claim 1 , wherein
the COG terminal portion includes a signal receiving COG terminal portion for receiving a signal from the separate semiconductor integrated circuit and a signal supplying COG terminal portion for supplying a signal to the separate semiconductor integrated circuit;
each of the signal receiving COG terminal portion and the signal supplying COG terminal portion includes the connection portion, the line protective film, the opening portion, and the transparent conductive layer; and
the connection portion in the signal receiving COG terminal portion is connected, via a line located below, with an internal line which is connected to a pixel within the display apparatus, and the connection portion in the signal supplying COG terminal portion is connected, via a line located below, with an OLB terminal which is separately provided for receiving an external signal.
3. A display apparatus according to claim 2 , wherein the line located below the connection portion for connecting the connection portion with the internal line and the line located below the connection portion for connecting the connection portion with the OLB terminal are a molybdenum line.
4. A display apparatus according to claim 2 , wherein
a display element which uses a transparent conductor as an electrode is provided in each pixel in a display portion of the display apparatus, and
the transparent conductive layer in the signal receiving COG terminal portion, the signal supplying COG terminal portion, or the OLB terminal portion, and the electrode formed by a transparent conductor in each pixel are formed in the same process.
5. A display apparatus according to claim 2 , wherein the transparent conductive layer in the signal receiving COG terminal portion, the signal supplying COG terminal portion, or the OLB terminal portion is formed so as to cover the line protective film in the periphery of the opening portion.
6. A display apparatus according to claim 2 , wherein the transparent conductive layer in the signal receiving COG terminal portion, the signal supplying COG terminal portion, or the OLB terminal portion is formed of ITO.
7. A display apparatus according to claim 2 , wherein the internal line is a data line for supplying a data signal to each pixel within the display apparatus,
each pixel includes a thin film transistor having one end connected to the data line, and a transistor protective film which covers the thin film transistor, and
the line protective film in the signal receiving COG terminal portion, the signal supplying COG terminal portion, or the OLB terminal portion and the transistor protective film are formed in the same process.
8. A display apparatus according to claim 2 , wherein the OLB terminal also includes:
a connection portion which is formed of a conductor including a layer of aluminum or an aluminum alloy;
a line protective film which covers the connection portion;
an opening portion which is formed in the line protective film at a location corresponding to a terminal portion; and
a transparent conductive layer which covers a surface of the connection portion in the opening portion.
9. A display apparatus according to claim 8 , wherein
a thin film transistor for controlling display is provided in each pixel in a display portion of the display apparatus,
the thin film transistor includes a semiconductor layer, a gate insulating film which covers the semiconductor layer, a gate electrode which is provided in a portion of the gate insulating film which corresponds to a position above a channel region of the semiconductor layer, and an interlayer insulating film which covers the gate electrode and the gate insulating film, and
a separate line which connects the connection portion of the signal receiving COG terminal portion with the internal line and a separate line which connects the connection portion of the signal supplying COG terminal portion with the OLB terminal are formed in the same process as a process in which the gate electrode is formed.
10. A display apparatus according to claim 1 , wherein the line protective film is a silicon nitride film.