DISPLAY PANEL

The display panel provided in the present application includes the substrate and the first conductive layer, the first insulating layer, the second conductive layer, the second insulating layer, the common electrode, and the connecting electrode disposed on the substrate in layers. The first insulating layer is provided with a first hole, the first hole exposes the first conductive layer, and the second conductive layer contacts the first conductive layer through the first hole. The second insulating layer is provided with a second hole, and the second hole exposes the second conductive layer. An orthographic projection of the second hole on the substrate overlaps with an orthographic projection of the first hole on the substrate.

TECHNICAL FIELD

The present application relates to a field of display technologies, in particular, to a display panel.

BACKGROUND

Compared with current mainstream liquid crystal display panels with active layers of amorphous silicon, display panels with active layers of oxide semiconductor have technical advantages of higher electron mobility, higher switching current ratio, realizability of flexible display, good uniformity, and lower production cost, and have been widely favored by the industry.

A film layer structure of the display panel with the active layer of oxide semiconductor is relatively complex. The display panel generally includes two different inorganic film layers of silicon nitride and silicon oxide stacked with the active layer. It is very easy to cause undercut at the inorganic film layer during dry etching. Therefore, when a common electrode and a connecting electrode are formed, it is very easy to cause poor lap between the common electrode and the connecting electrode at the undercut structure. This will cause that a common voltage signal cannot be transmitted to the common electrode, resulting in poor display.

In order to avoid poor lap between the common electrode and the connecting electrode, the technical solution in prior art is to stagger a hole where the common electrode contacts the connecting electrode and a hole where the conductive layer contacts the connecting electrode, so as to reduce the risk of poor lap between the common electrode and the connecting electrode. However, this will compress an area of a light transmission area, and reduce an aperture ratio of the display panel.

Therefore, it is necessary to provide a display panel to relieve the above defect.

SUMMARY

A display panel is provided in embodiments of the present application. By merging a first hole where the first conductive layer contacts the second conductive layer with a second hole where the connecting electrode contacts the second conductive layer, an area occupied by the first hole and the second hole can be reduced, and an aperture ratio of the display panel can be improved.

A display panel is provided in embodiments of the present application, including:a substrate;a first conductive layer disposed on the substrate;a first insulating layer disposed at least on a surface of the first conductive layer away from the substrate, wherein the first insulating layer is provided with a first hole, the first hole exposes the first conductive layer;a second conductive layer disposed on a surface of the first insulating layer away from the substrate, wherein the second conductive layer contacts the first conductive layer through the first hole;a second insulating layer disposed at least on a surface of the second conductive layer away from the substrate, wherein the second insulating layer is provided with a second hole, an orthographic projection of the second hole on the substrate overlaps with an orthographic projection of the first hole on the substrate, and the second hole exposes the second conductive layer;a common electrode disposed in a surface of the second insulating layer away from the substrate;a connecting electrode disposed at least on a surface of the common electrode away from the substrate, wherein the connecting electrode contacts the common electrode, and the connecting electrode contacts the second conductive layer through the second hole; anda pixel electrode disposed in a same layer as the connecting electrode.

According to an embodiment of the present application, the orthographic projection of the second hole on the substrate falls within the orthographic projection of the first hole on the substrate.

According to an embodiment of the present application, the display panel further includes an organic insulating film layer, the organic insulating film layer is disposed at least between the second insulating layer and the common electrode;the organic insulating film layer is provided with a third hole, an orthographic projection of the third hole on the substrate overlaps with the orthographic projection of the first hole on the substrate and the orthographic projection of the second hole on the substrate, and the third hole exposes the second conductive layer.

According to an embodiment of the present application, the orthographic projection of the third hole on the substrate falls within the orthographic projection of the first hole on the substrate.

According to an embodiment of the present application, a ratio of a diameter of a minimum circumscribed circle of a cross-section of the third hole to a diameter of a minimum circumscribed circle of a cross-section of the first hole is one of 1:1.1, 1:1.5, 1:2, and 1:3.

According to an embodiment of the present application, the orthographic projection of the second hole on the substrate falls within the orthographic projection of the third hole on the substrate.

According to an embodiment of the present application, the common electrode is provided with a fourth hole, the fourth hole exposes the second conductive layer;an orthographic projection of the fourth hole on the substrate falls within the orthographic projection of the third hole on the substrate.

According to an embodiment of the present application, an edge of the second hole is flush with an edge of the fourth hole.

According to an embodiment of the present application, the display panel further includes a third insulating layer, the third insulating layer is disposed at least between the common electrode and the connecting electrode;the third insulating layer is provided with a fifth hole, and the fifth hole exposes the common electrode and the second conductive layer.

According to an embodiment of the present application, the orthographic projection of the third hole on the substrate falls within an orthographic projection of the fifth hole on the substrate.

According to an embodiment of the present application, a difference between a diameter of a minimum circumscribed circle of a cross-section of the fifth hole and a diameter of a minimum circumscribed circle of a cross-section of the third hole ranges from 2.76 μm to 4.14 μm.

According to an embodiment of the present application, a diameter of a minimum circumscribed circle of a cross-section of the third hole is greater than or equal to a diameter of a minimum circumscribed circle of a cross-section of the first hole, and the diameter of the minimum circumscribed circle of the cross-section of the third hole is greater than a diameter of a minimum circumscribed circle of a cross-section of the fifth hole.

According to an embodiment of the present application, a ratio of the diameter of the minimum circumscribed circle of the cross-section of the third hole to the diameter of the minimum circumscribed circle of the cross-section of the first hole ranges from 1:1 to 3:1.

According to an embodiment of the present application, a thickness of the organic insulating film layer ranges from 1.2 μm to 1.8 μm.

According to an embodiment of the present application, an included angle between a sidewall of the third hole and a plane where the substrate is located ranges from 50° to 60°.

According to an embodiment of the present application, the display panel includes an active layer, a material of the active layer includes an oxide semiconductor material, the active layer is disposed between the first insulating layer and the second insulating layer;the first insulating layer includes a first silicon nitride film layer and a first silicon oxide film layer, the first silicon nitride film layer is stacked with the first silicon oxide film layer, and the first silicon oxide film layer is located between the active layer and the first silicon nitride film layer;the second insulating layer includes a second silicon nitride film layer and a second silicon dioxide film layer, the second silicon nitride film layer is stacked with the second silicon dioxide film layer, and the second silicon dioxide film layer is located between the active layer and the second silicon nitride film layer.

According to an embodiment of the present application, the display panel further includes a first metal layer including a plurality of patterned gate electrodes; the first conductive layer is disposed in a same layer as the gate electrodes.

According to an embodiment of the present application, the display panel further includes a second metal layer disposed on a surface of the first insulating layer away from the substrate;the second metal layer includes a plurality of patterned source electrodes and drain electrodes, and the second conductive layer is disposed in a same layer as the source electrodes and the drain electrodes.

According to an embodiment of the present application, at the first hole, the second conductive layer is in full contact with the first hole exposes a surface of the first conductive layer.

Advantageous effects of the present application: the display panel provided in embodiments of the present application includes the substrate and the first conductive layer, the first insulating layer, the second conductive layer, the second insulating layer, the common electrode, and the connecting electrode disposed on the substrate in layers. The first insulating layer is provided with a first hole, the first hole exposes the first conductive layer, and the second conductive layer contacts the first conductive layer through the first hole. The second insulating layer is provided with a second hole, and the second hole exposes the second conductive layer. The orthographic projection of the second hole on the substrate overlaps with the orthographic projection of the first hole on the substrate, thereby reducing the area occupied by the first hole and the second hole, and increasing the aperture ratio of the display panel.

DETAILED DESCRIPTION OF EMBODIMENTS

The following descriptions of the various embodiments refer to the accompanying drawings to illustrate specific embodiments that the present application can be used to implement. The directional terms mentioned in the present application, such as “top”, “bottom”, “front”, “back”, “left”, “right”, “inside”, “outside”, “side”, etc., are only directions to reference the additional schema. Therefore, the directional terms are used to illustrate and understand the present application, but not to limit the present application. In the figures, structurally similar elements are denoted by the same reference numerals.

The present application will be further described below in combination with the drawings and specific embodiments.

A display panel is provided in embodiments of the present application, which can reduce an area of a light-transmitting region occupied by a hole where the common electrode contacts the conductive layer and the connecting electrode, thereby increasing an aperture ratio of the display panel.

As shown inFIG.1,FIG.1is a schematic partial diagram of a display panel provided by embodiments of the present application. The display panel may include a display area. A plurality of sub-pixels arranged in an array can be disposed in the display area. Every sub-pixel may have a sub-pixel electrode161and at least one thin-film transistor, and the thin-film transistor is electrically connected to the sub-pixel electrode161.

As shown inFIG.2,FIG.2is a schematic sectional diagram of a first embodiment of the display panel shown inFIG.1taken along A-A′. The display panel includes a substrate10, a first conductive layer110, a first insulating layer12, a second conductive layer130, a second insulating layer14, a common electrode150, and a connecting electrode160.

The first conductive layer110is disposed on the substrate10, the first insulating layer12is disposed at least on a surface of the first conductive layer110away from the substrate10. The first insulating layer12is provided with a first hole OH1, and the first hole OH1exposes the first conductive layer110.

The second conductive layer130is disposed on a surface of the first insulating layer12away from the substrate10. The second conductive layer130contacts the first conductive layer110through the first hole OH1.

The second insulating layer14is disposed at least on a surface of the second conductive layer130away from the substrate10. The second insulating layer14is provided with a second hole OH2. An orthographic projection of the second hole OH2on the substrate10overlaps with an orthographic projection of the first hole OH1on the substrate10. The second hole OH2exposes the second conductive layer130.

The common electrode150is disposed on a surface of the second insulating layer14away from the substrate10. The connecting electrode160is disposed at least on a surface of the common electrode150away from the substrate10. The connecting electrode160contacts the common electrode150, and the connecting electrode160contacts the second conductive layer130through the second hole OH2. A common voltage signal in a signal line can be transmitted to the common electrode150via the first conductive layer110, the second conductive layer130, and the connecting electrode160.

As shown inFIG.1andFIG.2, an area corresponding to the first hole OH1and the second hole OH2is an opaque area NTA of the sub-pixel. An area corresponding to the sub-pixel electrode161is a light transmission area TA of the sub-pixel. Compared with the prior arts that the first hole OH1and the second hole OH2are staggered, the embodiments of the present application can reduce an area occupied by the first hole OH1and the second hole OH2by overlapping the orthographic projection of the first hole OH1and the orthographic projection of the second hole OH2on the substrate10, thereby reducing an area of the non-light transmitting area NTA, and increasing an area of the light transmitting area TA, so as to improve the aperture ratio of the display panel. This can also shorten a length of a film formed on a side wall of the first hole OH1and a side wall of the second hole OH2when the connecting electrode160contacts the second conductive layer130and the common electrode150respectively, so as to reduce a risk of disconnection between the common electrode and the connecting electrode.

In the embodiments of the present application, the display panel may include a first metal layer11, the first metal layer11may include a plurality of patterned gates electrodes111and a plurality of scan lines112extending laterally. The scan lines112are connected to the gate electrodes111. The first conductive layer110may be disposed in a same layer as the gate electrodes111, and a material of the first conductive layer110may be the same as that of the first conductive layer110.

The first insulating layer12may also be a gate insulating layer. The first insulating layer12is disposed on the substrate10, the first conductive layer110, and the first metal layer11. And the first insulating layer12may cover the gate electrodes111. The first hole OH1does not expose the first conductive layer110.

The display panel may further include a second metal layer13disposed on a surface of the first insulating layer12away from the substrate10. The second metal layer13may include a plurality of patterned source electrodes131, drain electrodes132, and a plurality of data lines133extending vertically. The second conductive layer130may be disposed in a same layer as the source electrodes131and the drain electrodes132. And a material of the second conductive layer130may be the same as that of the source electrodes131and the drain electrodes132.

The display panel may further include an active layer17disposed on a surface of the second insulating layer14away from the substrate10. The active layer17includes a plurality of patterned semiconductor structures170. The semiconductor structures170are disposed opposite to the gate electrode111, and the source electrode131and the drain electrode132connect with the semiconductor structure170respectively.

In the embodiments of the present application, a material of the active layer17includes an oxide semiconductor material. The oxide semiconductor material may be but not limited to Indium Gallium Zinc Oxide (IGZO).

The second insulating layer14may also be a first passivation protective layer. The second insulating layer14is disposed on the first insulating layer12. The second insulating layer14covers the second metal layer13, the second conductive layer130, and the active layer17. The second hole OH2goes through the second insulating layer14in a thickness direction of the display panel, and the second hole OH2exposes the second conductive layer130.

In an embodiment, the orthographic projection of the second hole OH2on the substrate10falls within the orthographic projection of the first hole OH1on the substrate10.

As shown inFIG.2, a diameter D1of a minimum circumscribed circle of a cross-section of the first hole OH1is greater than a diameter D2of a minimum circumscribed circle of a cross-section of the second hole OH2. The orthographic projection of the second hole OH2on the substrate10may fall within the orthographic projection of the first hole OH1on the substrate10. The connecting electrode160can directly contact a surface of the second conductive layer130away from the substrate10through the second hole OH2.

It should be noted that the cross-section of the first hole OH1, the cross-section of the second hole OH2, and cross-sections of the subsequent holes OH3may be circular, or other shapes other than circular, such as ellipse, quadrilateral, etc. Taking the first hole OH1as an example, when the first hole OH1is a circular hole, the diameter D1of the minimum circumscribed circle of the cross-section of the first hole OH1is an aperture of the first hole OH1.

In the embodiments of the present application, the first insulating layer12includes a first silicon nitride film layer and a first silicon oxide film layer. The second insulating layer14includes a second silicon nitride film layer and a second silicon oxide film layer.

As shown inFIG.2, the active layer17is disposed between the first insulating layer12and the second insulating layer14. In the first insulating layer12, the first silicon nitride film layer is stacked with the first silicon oxide film layer. The first silicon oxide film layer is located between the active layer17and the first silicon nitride film layer. The first silicon nitride film layer is separated from the active layer17by the first silicon oxide film layer, so as to reduce an impact of hydrogen in the first silicon nitride film layer on electrical properties of the active layer17. The gate electrode111is separated from the active layer17by the first silicon nitride film layer, so as to reduce an impact of Cu ions in the gate electrode111on electrical properties of thin-film transistor devices.

In the second insulating layer14, the second silicon nitride film layer is stacked with the second silicon oxide film layer, and the second silicon oxide film layer is located between the active layer and the second nitrogen oxide film layer. The second silicon nitride film layer is separated from the active layer17by the second silicon oxide film layer, so as to can reduce an influence of hydrogen element in the second silicon nitride film layer on the electrical properties of the active layer17. The second silicon nitride film layer and the second silicon oxide film layer can also be used to block external water vapor.

It should be noted that, due to the first insulating layer12is a double-layer structure formed by stacking the first silicon nitride film layer and the first silicon oxide film layer, it is very easy to form an undercut structure at an edge of the first hole OH1of the first insulating layer12during a dry etching process. The undercut structure may cause disconnection of the first conductive layer110and the second conductive layer130at the edge of the first hole OH1, resulting in poor connection. At the first hole OH1, the second conductive layer130is in full contact with a surface of the first conductive layer110exposed by the first hole OH1, which can reduce a risk of disconnection of the first conductive layer110and the second conductive layer130at the edge of the first hole OH1due to the undercut structure at the edge of the first hole OH1.

In the embodiments of the present application, the display panel may include a first electrode layer15, the first electrode layer15may be disposed on the surface of the second insulating layer14away from the substrate10. The first electrode layer15may include a plurality of patterned common electrodes150.

The display panel also includes an organic insulating film layer18. The organic insulating film layer18is disposed at least between the second insulating layer14and the common electrode150. The organic insulating film layer18can also cover an entire surface of the second insulating layer14.

In an embodiment, a material of the organic insulating film layer18can be organic photoresist. The organic photoresist material has fluidity. After curing, a surface of the organic insulating film layer18away from the substrate10can be a flat surface, thus a flat terrain is formed.

As shown inFIG.2, the organic insulating film layer18is provided with a third hole OH3. The third hole OH3can go through the organic insulating film layer18in the thickness direction of the display panel. An orthographic projection of the third hole OH3on the substrate10overlaps with the orthographic projection of the first hole OH1and the orthographic projection of the second hole OH2on the substrate10, and the second conductive layer130can be exposed by the third hole OH3.

In an embodiment, the orthographic projection of the third hole OH3on the substrate10falls within the orthographic projection of the first hole OH1on the substrate10.

As shown inFIG.2, a diameter of the minimum circumscribed circle in a cross-section of the third hole OH3is D3. The diameter of the minimum circumscribed circle in the cross-section of the third hole OH3is less than the diameter of the minimum circumscribed circle in the cross-section of the first hole OH1D1. The orthographic projection of the third hole OH3on the substrate10may fall within the orthographic projection of the first hole OH1on the substrate10. A complex terrain between the first hole OH1and the third hole OH3is filled with the organic insulating film layer18. This can avoid the complex terrain on a side wall of the third hole OH3and between the third hole OH3and the first hole OH1, so that the common electrode150and the connecting electrode160only need to climb along the organic insulating film layer18at the third hole OH3. Thereby, the risk of disconnection of the common electrode150and the connecting electrode160at the third hole OH3due to the complex climbing terrain can be reduced.

Furthermore, a ratio of the diameter D3of the minimum circumscribed circle in the cross-section of the third hole OH3to the diameter D1of the minimum circumscribed circle in the cross-section of the first hole OH1ranges from 1:1 to 1:3. For example, the ratio of the diameter D3of the minimum circumscribed circle in the cross-section of the third hole OH3to the diameter D1of the minimum circumscribed circle in the cross-section of the first hole OH1may be 1:1.1, 1:1.5, 1:2, or 1:3.

In an embodiment, the orthographic projection of the second hole OH2on the substrate10falls within the orthographic projection of the third hole OH3on the substrate10.

As shown inFIG.3, the diameter D2of the minimum circumscribed circle in the cross-section of the second hole OH2is less than the diameter D3of the minimum circumscribed circle in the cross-section of the third hole OH3. The orthographic projection of the second hole OH2on the substrate10may fall within the orthographic projection of the third hole OH3on the substrate10.

It should be noted that if the diameter D3of the minimum circumscribed circle in the cross-section of the third hole OH3is less than the diameter D2of the minimum circumscribed circle in the cross-section of the second hole OH2, when the second insulating layer14is etched to form the second hole OH2, the organic insulating film layer18will be etched, resulting in more complex terrain at the second hole OH2and the third hole OH3. The common electrode150and the connecting electrode160may break at the second hole OH2and the third hole OH3. The complex terrain between the first hole OH1and the second hole OH2can be filled by the organic insulating film layer18, which can reduce the risk of disconnection of the common electrode150and the connecting electrode160.

Furthermore, the common electrode150is provided with a fourth hole OH4. The fourth hole OH4exposes the second conductive layer130.

As shown inFIG.2, an orthographic projection of the fourth hole OH4on the substrate10can overlap the orthographic projection of the third hole OH3on the substrate10. The fourth hole OH4goes through the common electrode150in the thickness direction of the display panel, and the second conductive layer130can be exposed by the fourth hole OH4.

In an embodiment, the orthographic projection of the fourth hole OH4on the substrate10falls within the orthographic projection of the third hole OH3on the substrate10

As shown inFIG.2, a diameter D4of a minimum circumscribed circle in a cross-section of the fourth hole OH4is less than the diameter D3of the minimum circumscribed circle in the cross-section of the third hole OH3. The orthographic projection of the fourth hole OH4on the substrate10may fall within the orthographic projection of the third hole OH3on the substrate10. The common electrode150can extend along a side wall of the third hole OH3to the second insulating layer14and exposed by the third hole OH3.

It should be noted that in preparation process, the fourth hole OH4may be etched on the common electrode150, and then the second insulating layer14may be etched using the common electrode150as a mask to define the second hole OH2. Therefore, the diameter D2of the minimum circumscribed circle in the cross-section of the second hole OH2is equal to the diameter D2of the minimum circumscribed circle in the cross-section of the fourth hole OH4. An edge of the second hole OH2can be flush with an edge of the fourth hole OH4. This can improve complexity of terrains at the second hole OH2and the fourth hole OH4.

Furthermore, the connecting electrode160is disposed at least on a surface of the common electrode150away from the substrate10. The connecting electrode160contacts the common electrode150, and the connecting electrode160contacts the second conductive layer130through the second hole OH2.

As shown inFIG.2, the display panel also includes a third insulating layer19. The third insulating layer19is disposed at least between the common electrode150and the connecting electrode160.

The third insulating layer19is provided with a fifth hole OH5. The orthographic projection of the third hole OH3on the substrate10overlaps with an orthographic projection of the fifth hole OH5on the substrate10. The fifth hole OH5exposes the common electrode150and the second conductive layer130.

In an embodiment, the orthographic projection of the third hole OH3on the substrate10falls within the orthographic projection of the fifth hole OH5on the substrate10.

As shown inFIG.2, the diameter D3of the minimum circumscribed circle in the cross-section of the third hole OH3is less than a diameter D5of a minimum circumscribed circle in a cross-section of the fifth hole OH5, so that the orthographic projection of the third hole OH3on the substrate10falls within the orthographic projection of the fifth hole OH5on the substrate10. The fifth hole OH5exposes the common electrode150and the second conductive layer130. Therefore, a gradient difference of the connecting electrode160at the third hole OH3can be reduced, and the connecting electrode160can be prevented from climbing along the third insulating layer19immediately after climbing along the common electrode150at the third hole OH3, thus reducing the risk of the connecting electrode160breaking at the third hole OH3and the fifth hole OH5.

Furthermore, a thickness of the organic insulating film layer18ranges from 1.2 μm to 1.8 μm. An included angle between a side wall of the third hole OH3and a plane wherein the substrate10is located ranges from 50° to 60°. A difference between the diameter D5of the minimum circumscribed circle in the cross-section of the fifth hole OH5and the diameter D3of the minimum circumscribed circle in the cross-section of the third hole OH3ranges from 2.76 μm to 4.14 μm. This can ensure a sufficient contact area between the common electrode150and the connecting electrode160. And when the connecting electrode160is formed on the side wall of the third hole OH3, it will not form a film on a side wall of the fifth hole OH5, thus reducing the risk of disconnection of the connecting electrode160.

In an embodiment, the display panel may include a second electrode layer16. The second electrode layer16includes a plurality of patterned pixel electrodes161. The connecting electrode160may be disposed in a same layer as the pixel electrode161, and a material of the connecting electrode160can be the same as the pixel electrode161.

As shown inFIG.3,FIG.3is a schematic sectional diagram of a second embodiment of the display panel shown inFIG.1taken along A-A′. A structure of the display panel shown inFIG.3is roughly the same as that of the display panel shown inFIG.2, and a difference is that the diameter D3of the minimum circumscribed circle in the cross-section of the third hole OH3is greater than or equal to the diameter D1of the minimum circumscribed circle in the cross-section of the first hole OH1. The diameter D3of the minimum circumscribed circle in the cross-section of the third hole OH3is greater than the diameter D5of the minimum circumscribed circle in the cross-section of the fifth hole OH5. Although the complex terrain between the second hole OH2and the first hole OH1can not be filled with the organic insulating film layer18, a climbing path required for the connecting electrode160to contact the common electrode150and the second conductive layer130can still be shortened. Therefore, the risk of disconnection of the connecting electrode160and the common electrode150can be reduced.

In an embodiment, a ratio of the diameter D3of the minimum circumscribed circle in the cross-section of the third hole OH3to the diameter D1of the minimum circumscribed circle in the cross-section of the first hole OH1may range from 1:1 to 3:1. For example, the ratio of the diameter D3of the minimum circumscribed circle in the cross-section of the third hole OH3to the diameter D1of the minimum circumscribed circle in the cross-section of the first hole OH1is one of 1:1, 1:2, and 1:3.

In the embodiments of the present application, the display panel is a liquid crystal display panel. The display panel can also include a liquid crystal layer, an opposed substrate, and a backlight module (not shown in the figures). The opposed substrate can be disposed on a surface of the second electrode layer16away from the substrate. The liquid crystal layer can be disposed between the opposed substrate and the second electrode layer16. The backlight module can be disposed on a surface of the substrate10away from the opposed substrate. The opposed substrate may be a traditional substrate including a color filter or a substrate without the color filter. Structures of the opposite substrate, the liquid crystal layer, and the backlight module can refer to structures of the opposite substrate, the liquid crystal layer, and the backlight module in the existing liquid crystal display panel, and there is no restriction here.

According to the display panel provided by the embodiments of the present application, the embodiments of the present application also provides a manufacturing method of the display panel. The manufacturing method of the display panel can be used to make the display panel provided by the above embodiments, as shown inFIG.4atoFIG.4g.FIG.4atoFIG.4gare schematic flow diagrams of a manufacturing method of the display panel provided by the embodiments of the present application. The manufacturing method of the display panel includes following steps:

Step S10: as shown inFIG.4a, forming a first metal layer11on a substrate10, and patterning the first metal layer11to form a first conductive layer110.

Step S20: as shown inFIG.4b, forming a first insulating layer12on the substrate10, etching the second insulating layer14to form a first hole OH1, and exposing the first conductive layer110by the first hole OH1.

Step S30: as shown inFIG.4b, forming a second metal layer13on the first insulating layer12, and patterning the second metal layer13to form a second conductive layer130. The second conductive layer130contacts the first conductive layer110through the first hole OH1.

Step S40: as shown inFIG.4c, forming a second insulating layer14on the second metal layer13and the first insulating layer12, and forming an organic insulating film layer18on the second insulating layer14.

Step S50: patterning the organic insulating film layer18to form a third hole OH3, and exposing the second insulating layer14by the third hole OH3.

Step S60: As shown inFIG.4d, forming a first electrode layer15on the organic insulating film layer18and the second insulating layer14, patterning the first electrode layer15to form a common electrode150and a fourth hole OH4, and exposing the second insulating layer14by the fourth hole OH4.

Step S60: as shown inFIG.4e, etching the second insulating layer14to form a second hole OH2, and exposing the second conductive layer130by the second hole OH2.

Step S70: As shown inFIG.4f, forming a third insulating layer19on the second conductive layer130and the organic insulating film layer18, etching the third insulating layer19to form a fifth hole OH5, and exposing the common electrode150and the second conductive layer130by the fifth hole OH5.

Step S80: As shown inFIG.4g, forming a second electrode layer16on the third insulating layer19, and patterning the second electrode layer16to form a connecting electrode160. The connecting electrode160is in contact with the common electrode150. The connecting electrode160is in contact with the second conductive layer130through the second hole OH2and the fourth hole OH4.

Advantageous effects of the present application: the display panel provided in the present application includes the substrate and the first conductive layer, the first insulating layer, the second conductive layer, the second insulating layer, the common electrode, and the connecting electrode disposed on the substrate in layers. The first insulating layer is provided with a first hole, the first hole exposes the first conductive layer, and the second conductive layer contacts the first conductive layer through the first hole. The second insulating layer is provided with a second hole, and the second hole exposes the second conductive layer. The orthographic projection of the second hole on the substrate overlaps with the orthographic projection of the first hole on the substrate, thereby reducing the area occupied by the first hole and the second hole, and increasing the aperture ratio of the display panel.

In summary, although the present application discloses the above with preferred embodiments, the above preferred embodiments are not intended to limit the present application, and those of ordinary skill in the art can make various modifications without departing from the spirit and scope of the present application. Changes and modifications, so the protection scope of the present application is based on the scope defined by the claims.