Thin film transistor substrate and display panel

A thin film transistor substrate comprising:

• a gate line;
• a thin film transistor at least including
• a gate electrode formed from a part of the gate line,
• a channel section formed from an oxide semiconductor film and disposed such that a part of the channel section overlaps the gate electrode,
• a source section connected to one end of the channel section, and
• a drain section connected to another end of the channel section and formed from the oxide semiconductor film having resistance lower than that of the channel section,
• a pixel electrode a part of which overlaps the drain section and connected to the drain section;
• a pixel at least including the thin film transistor and the pixel electrode;
• an insulation film disposed between the pixel electrode and the drain section and having a hole in a position overlapping the pixel electrode and the drain section and not overlapping the gate electrode;
• and
• a lower insulation film included in a lower layer of the insulation film and having a lower hole overlapping a whole area of the drain section.