摘要:
The present invention provides a method for producing a group III nitride compound semiconductor substrate including: (a) forming a first semiconductor film over a substrate, the first semiconductor film made of a first group III nitride compound semiconductor and provided with a step; (b) forming a second semiconductor film made of a second group III nitride compound semiconductor having a different thermal expansion coefficient from that of the first group III nitride compound semiconductor on the first semiconductor film; and (c) cooling the substrate and separating the second semiconductor film from the first semiconductor film. Thus, a large-area group III nitride compound semiconductor substrate can be produced in high yields and with high reproducibility.
摘要:
Disclosed is a semiconductor device which comprises a substrate in which surface is formed a depression having a closed figure when viewed from the substrate normal and a semiconductor layer which is formed on the surface of the substrate by crystal growth from at least an inside face of the depression.
摘要:
A first semiconductor layer is epitaxially grown on a semiconductor substrate and patterned to form concave and convex portions. A second semiconductor layer is formed on the first semiconductor layer using a top epitaxial mask covering the top surface of the convex portion. Lattice defects D propagating from the first semiconductor layer exist only in a region located above the center of the concave portion (a defect region Ra), while in the other region (a low defect region Rb) lattice defects D propagating from the first semiconductor layer hardly exist.
摘要:
A semiconductor light emitting device of the present invention includes: a substrate; a light emitting layer; a semiconductor layer of a hexagonal first III-group nitride crystal; and a cladding layer of a second III-group nitride crystal. A stripe groove is provided in the semiconductor layer along a direction.
摘要:
A semiconductor device includes: a crystalline substrate including a primary surface and a crystal plane provided within the primary surface so as to have a surface orientation different from a surface orientation of the primary surface; a semiconductor layered structure grown over the crystalline substrate; and an active region provided at a portion in the semiconductor layer structure above the crystal plane.
摘要:
A semiconductor device comprises a substrate having a first thermal expansion coefficient T1, a strain reducing layer formed on the substrate and having a second thermal expansion coefficient T2, and a semiconductor layer formed on the strain reducing layer, having a third thermal expansion coefficient T3, and made of a nitride compound represented by AlyGa1−y−zInzN (0≦y≦1, 0≦z ≦1). The second thermal expansion coefficient T2 is lower than the first thermal expansion coefficient T1. The third thermal expansion coefficient T3 is lower than the first thermal expansion coefficient T1 and higher than the second thermal expansion coefficient T2.
摘要翻译:半导体器件包括具有第一热膨胀系数T1的基板和形成在基板上并具有第二热膨胀系数T2的应变减小层,以及形成在应变减小层上的具有第三热膨胀系数T3的半导体层, 并由由Al y Ga 1-y-z In z N(0≤y≤1,0<= z <= 1)表示的氮化物组成。 第二热膨胀系数T2低于第一热膨胀系数T1。 第三热膨胀系数T3比第一热膨胀系数T1低,高于第二热膨胀系数T2。
摘要:
A semiconductor light emitting device of the present invention includes: a substrate; a light emitting layer; a semiconductor layer of a hexagonal first III-group nitride crystal; and a cladding layer of a second III-group nitride crystal. A stripe groove is provided in the semiconductor layer along a direction.
摘要:
A semiconductor device includes: a crystalline substrate including a primary surface and a crystal plane provided within the primary surface so as to have a surface orientation different from a surface orientation of the primary surface; a semiconductor layered structure grown over the crystalline substrate; and an active region provided at a portion in the semiconductor layer structure above the crystal plane.
摘要:
First, n-type contact layer of GaN, n-type cladding layer of AlGaN, active layer of InGaN, first Mg-doped layer of AlGaN and second Mg-doped layer of GaN are grown in this order over a sapphire substrate. Thereafter, the substrate, including the second Mg-doped layer, is exposed to nitrogen plasma for about 40 minutes. As a result, Mg, which has been introduced into the first and second Mg-doped layers, is activated as an acceptor. Thus, p-type cladding layer and p-type contact layer with low resistance and excellent crystallinity can be formed out of the first and second Mg-doped layers, respectively.