Organic thin film transistor array and manufacturing method thereof

A method for manufacturing an organic thin film transistor array panel, the method comprising:

• forming a light blocking member, which is a black matrix, directly on a substrate;
• forming a first insulating layer on the light blocking member after forming the light blocking member;
• forming a data line and a drain electrode on the first insulating layer after forming the first insulating layer on the light blocking member, the data line including a source electrode;
• forming a partition having an opening partly exposing the source electrode and the drain electrode and a contact hole exposing the drain electrode;
• forming a semiconductor in the opening, the semiconductor being in alignment with the light blocking member;
• forming a gate insulator on the semiconductor;
• forming a gate line including a gate electrode on the gate insulator;
• forming a passivation layer on the gate line;
• and
• forming a pixel electrode on the passivation layer.