Patent ID: 6765233
Filing Date: 2004-07-20
Classification: H01L

Abstract:
A semiconductor substrate comprising:an n-th patterned mask containing a material having a growth suppressing effect, provided on or above a lower substrate, wherein n is an integer of 1 or more; an n-th nitride semiconductor crystal layer grown on or above the lower substrate via the n-th mask; an (n+1)-th patterned mask containing a material having a growth suppressing material substantially provided above an opening of the n-th patterned mask; and an (n+1)-th nitride semiconductor crystal layer grown on or above the lower substrate via the (n+1)-th patterned mask, wherein the n-th patterned mask and the (n+1)-th patterned mask are respectively patterned in a stripe shape, and a direction of the stripe of the n-th patterned mask is twisted from a direction of the stripe of the (n+1)-th patterned mask.