Touch sensitive device fior mobile apparatus

A method for providing a touch sensitive device for a mobile apparatus, the device having a length in a direction of a first axis and a width in a direction of a second axis, wherein the length is greater than or equal to the width, the method comprising:

• providing a substrate comprising sapphire with a first refractive index value, the sapphire comprising sapphire crystallographic structure having a plurality of crystal planes, wherein a first crystal plane axis is configured to be perpendicular to the first and the second axis, wherein a first crystal plane axis is configured to be perpendicular to the first and the second axis, a second crystal plane axis is configured to be parallel to the first axis and a third crystal plane axis is configured to be parallel to the second axis, and the touch sensitive device having a length in a direction of the M-axis and a width in a direction of the C-axis;
• providing a first transparent electrode pattern layer with a second refractive index value configured to form a plurality of touch sensing elements parallel to the first axis;
• providing a second transparent electrode pattern layer with a third refractive index value configured to form a plurality of touch sensing elements parallel to the second axis, wherein the first transparent electrode pattern layer and the second transparent electrode pattern layer configured to provide touch information using capacitive coupling;
• and
• providing an index matching layer arranged between the substrate and at least one the transparent electrode pattern layers configured to match the first refractive index value and at least one of the second refractive index value and the third refractive index value;
• wherein at least one of the transparent electrode pattern layers being integral to the substrate.