Patent ID: 6075804
Filing Date: 2000-06-13
Classification: H01S

Abstract:
A semiconductor device comprising:at least a first oxidizable layer, said first oxidizable layer being modified by the addition of oxidation inhibiting elements within a laterally oriented first region forming a lateral oxidation barrier, and a second region which is oxidizable;a substrate disposed below said first oxidizable layer; anda nonoxidizable second layer disposed above said first oxidizable layer, said nonoxidizable second layer for providing said oxidation inhibiting elements to said first region, and said nonoxidizable second layer being present over at least a portion of said first region and being substantially removed over a laterally oriented third region in said second layer, wherein said nonoxidizable second and first oxidizable layers have respective dopants of the same conductivity type and an average concentration of said dopant in said nonoxidizable second layer is at least 5.times.10.sup.17 cm.sup.-3 higher than average concentration of said dopant in said second region of said first oxidizable layer.