Patent ID: 8300167
Filing Date: 2012-10-30
Classification: G02F

Abstract:
1. An active matrix type display panel comprising: a TFT substrate having TFTs serving as selective elements of picture elements; and a counter substrate the TFT substrate including (i) pairs of electrodes each forming an auxiliary capacitor by overlapping each other, wherein one electrode of each pair of the electrodes is a picture element electrode, and the other one electrode of each pair of the electrodes is an auxiliary capacitor electrode, and (ii) auxiliary capacitor bus lines for applying voltages to the auxiliary capacitor electrodes, respectively, the auxiliary capacitor bus lines being formed in a first metal layer including a gate metal layer with which scanning signal lines are formed, the auxiliary capacitor electrodes being formed in a second metal layer including a source metal layer with which (i) data signal lines and (ii) source electrodes and drain electrodes of the TFTs are formed, the second metal layer being formed above the first metal layer such that a first insulating film, semiconductor layers of the TFTs, and the second metal layer are stacked in this order on the first metal layer, the picture element electrode being made up of a transparent electrode formed on a second insulating film which is formed on the second metal layer, each auxiliary capacitor electrode being provided on an upper side of a corresponding auxiliary capacitor bus line in a film thickness direction and being connected with the corresponding auxiliary capacitor bus line through a first contact hole which (i) is formed in the second insulating film, (ii) includes an etching aperture of the auxiliary capacitor electrode and a through hole formed in the first insulating film, and (iii) reaches a top surface of the corresponding auxiliary capacitor bus line, a connection electrode, which is made up of the transparent electrode, being formed on the second insulating film and on an inner surface of the first contact hole so that the auxiliary capacitor electrode and the corresponding auxiliary capacitor bus line are connected with each other via the connection electrode, the picture element electrode being provided on an upper side of the auxiliary capacitor electrode paired therewith, in the film thickness direction, the TFT substrate having a gap adjusting layer formed in part of the first metal layer, (i) which part is in a region in which the picture element electrode and a corresponding drain electrode are connected with each other, and (ii) which part is beneath the corresponding drain electrode, and the picture element electrode and the corresponding drain electrode being connected with each other by providing the picture element electrode on the second insulating film and on an inner surface of a second contact hole which (i) is formed in the second insulating film, (ii) includes an etching aperture of the corresponding drain electrode and a through hole formed in the first insulating film, and (iii) reaches a top surface of the gap adjusting layer.