Patent ID: 8324611

Claim:
A semiconductor light emitting device comprising: a first layer made of at least one of n-type GaN and n-type AlGaN; a second layer made of Mg-containing p-type AlGaN; and a light emitting section provided between the first layer and the second layer and including a plurality of barrier layers made of Si-containing AlxGa 1-x-y In y N (0≦x, 0≦y, x+y≦1), and a well layer provided between each pair of the plurality of barrier layers and made of GaInN or AlGaInN, each of the barrier layers sandwiched between the well layers including a third portion provided on the first layer side and made of Si-containing AlxGa 1-x-y In y N (0≦x, 0≦y, x+y≦1), and a fourth portion provided on the second layer side and made of AlxGa 1-x-y In y N (0≦x, 0≦y, x+y≦1), a Si concentration in the fourth portion being higher than Si concentration in the third portion, wherein the barrier layer nearest to the second layer includes: a first portion made of Si-containing AlxGa 1-x-y In y N (0≦x, 0≦y, x+y≦1); and a second portion provided between the first portion and the second layer and made of AlxGa 1-x-y In y N (0≦x, 0≦y, x+y≦1), a Si concentration in the second portion being lower than a Si concentration in the first portion.