Self-polarized mask and self-polarized mask application

A mask comprising:

• a transparent substrate;
• a first layer of a polarization material provided on the transparent substrate, the first layer formed to allow light polarized in a first direction to travel therethrough;
• and
• a second layer of a polarization material provided on the first layer, the second layer formed to allow light polarized in a second direction to travel therethrough, the second direction being at an angle to the first direction,
• wherein a first region is provided that extends in the first direction and contains the first layer and no second layer, and
• wherein a second region is provided that extends in the second direction and contains the second layer and no first layer.

A method comprising:

• providing a transparent substrate;
• forming a first layer of a polarization material on the transparent substrate, the polarization material of the first layer being oriented to allow light polarized in a first direction to travel therethrough;
• removing the first layer from a first region extending in a second direction that is at an angle to the first direction;
• forming a second layer of a polarization material on the first layer and in the region, the polarization material of the second layer being oriented to allow light polarized in the second direction to travel therethrough;
• and
• removing the second layer from a second region extending in the first direction.