Cover glass for pen input device and method for manufacturing same

A cover glass for a pen input device, the cover glass comprising a glass member having

• a haze value of less than 1%;
• and
• a Martens hardness within a range from 2000 N/mm2 to 4000 N/mm2;
• wherein when a moving member is moved in one direction on a surface of the cover glass, assuming Fk (N) represents a kinetic frictional force between the moving member and the surface of the cover glass, σ (N) represents a standard deviation of the kinetic frictional force Fk (N), and Y represents σ/Fk, Y is less than or equal to 0.05.

A cover glass for an input device used by a user to input information, the cover glass comprising a glass member having

• a haze value of less than 1%;
• and
• a Martens hardness within a range from 2000 N/mm2 to 4000 N/mm2;
• wherein when a synthetic leather receiving a load of 50 gf (0.49 N) is moved in one direction, at a velocity of 1 mm/sec, at room temperature, on a surface of the cover glass, assuming Fk (N) represents a kinetic frictional force between the synthetic leather and the surface of the cover glass, σ (N) represents a standard deviation of the kinetic frictional force Fk (N), and Y represents σ/Fk, a coefficient of kinetic friction μk within a region where a relationship between the kinetic frictional force Fk (N) and time is approximated by a straight line is greater than or equal to 0.9, and Y is less than or equal to 0.05.