Patent ID: 7843031

Claim:
An ultraviolet detecting device comprising: a silicon semiconductor layer having a thickness ranging from greater than or equal to 3 nm to less than or equal to 36 nm, said silicon semiconductor layer being formed over an insulating layer; lateral PN-junction type first and second photodiodes formed in the silicon semiconductor layer; an interlayer insulating film formed over the silicon semiconductor layer; a first filter layer made of silicon nitride, said first filter layer being formed over the interlayer insulating film provided over the first photodiode and allowing light lying in a wavelength range of an UV-B wave or higher to pass therethrough; and a second filter layer made of silicon nitride, said second filter layer being formed over the interlayer insulating film provided over the second photodiode and allowing light lying in a wavelength range of an UV-A wave or higher to pass therethrough.