Patent ID: 7180199

Claim:
A semiconductor device comprising: a semiconductor substrate having a first surface and a second surface, said semiconductor substrate having a semiconductor layer including the first surface, and a sapphire substrate including the second surface; a first multilayer laminated structure film formed in the first surface of said semiconductor substrate, said first multilayer laminated structure film having a first layer having a first refractive index, a second layer formed on the first layer and having a second refractive index lower than the first refractive index, and a third layer formed on the second layer and having a third refractive index higher than the second refractive index; and a second multilayer laminated structure film formed in the second surface of said semiconductor substrate, said second multilayer laminated structure film having a fourth layer having a fourth refractive index, a fifth layer formed on the fourth layer and having a fifth refractive index lower than the fourth refractive index, and a sixth layer formed on the fifth layer and having a sixth refractive index higher than the fifth refractive index.