Patent ID: 8497966

Claim:
A manufacturing method for a fringe field switching (FFS) type thin film transistor liquid crystal display (TFT-LCD) array substrate, the array substrate comprising a gate line region, a data line region, a gate electrode region, a common electrode line region, a source electrode region, a drain electrode region, a pixel electrode region and a thin film transistor (TFT) channel region, the method comprising: Step 1, depositing a first metal film on a transparent substrate, and form a gate line, a gate electrode and a common electrode line by a first patterning process; Step 2, depositing a gate insulating layer, an active layer film and a second metal film sequentially, and patterning the second metal film and the active layer film by a second patterning process, wherein the active layer film and the second metal film in the data line region, the source electrode region, the drain electrode region and the TFT channel region are retained; Step 3, depositing a first transparent conductive film and patterning the first transparent conductive film, the second metal film and the active layer film by a third patterning process, so as to form a source electrode, a drain electrode, a TFT channel and a pixel electrode by a third patterning process; and Step 4, depositing a passivation layer to cover the source electrode, the drain electrode, the TFT channel and the pixel electrode, forming a connection hole by patterning the passivation layer and the gate insulating layer through a fourth patterning process, and after forming the connection hole, performing an ashing process on photoresist used in the fourth patterning process to remove a part of the photoresist, then depositing a second transparent conductive layer on the remaining photoresist, and forming a common electrode by a lifting-off process, the common electrode being located on the passivation layer so as to overlap with the pixel electrode and connected with the common electrode line through the connection hole.