Display substrate, mask for manufacturing the same, and method of manufacturing the display substrate

A display substrate, comprising:

• a substrate;
• and
• a light blocking element disposed on the substrate, the light blocking element comprising:
• a first light blocking portion comprising a first thickness,
• a second light blocking portion disposed adjacent to the first light blocking portion, the second light blocking portion comprising a second thickness less than the first thickness, and
• a column spacer portion disposed adjacent to the second light blocking portion, the column spacer portion being protruded with respect to the first light blocking portion.

A mask for a display substrate, comprising:

• a first portion configured to transmit incident light at a first transmittance;
• a second portion disposed adjacent to the first portion, the second portion being configured to transmit incident light at a second transmittance, the second transmittance being less than the first transmittance;
• and
• a third portion disposed adjacent to the second portion, the third portion being configured to transmit incident light at a third transmittance, the third transmittance being greater than the first transmittance.

A method, comprising:

• forming, on a substrate, a first light blocking portion comprising a first thickness;
• forming, on the substrate, a second light blocking portion adjacent to the first light blocking portion, the second light blocking portion comprising a second thickness, the second thickness being less than the first thickness;
• and
• forming, on the substrate, a column spacer portion adjacent to the second light blocking portion, the column spacer portion comprising a third thickness, the third thickness being greater than the first thickness.