Patent ID: 11879184
Assignee: PANASONIC HOLDINGS CORPORATION
Field: Surface technology, coating (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A manufacturing apparatus for a group-III nitride crystal, the manufacturing apparatus comprising:
a raw material chamber that produces therein a group-III element oxide gas; and
a nurturing chamber in which a group-III element oxide gas supplied from the raw material chamber and a nitrogen element-containing gas react therein to produce a group-III nitride crystal on a seed substrate,
wherein an angle that is formed by a direction along a shortest distance between a forward end of a group-III element oxide gas supply inlet to supply the group-III element oxide gas into the nurturing chamber and an outer circumference of the seed substrate placed in the nurturing chamber, and a surface of the seed substrate is denoted by “θ”, wherein
a diameter of the group-III element oxide gas supply inlet is denoted by “S”, wherein
a distance between a surface, on which the seed substrate is placed, of a substrate susceptor that holds the seed substrate and a forward end of a first carrier gas supply inlet to supply a first carrier gas into the nurturing chamber is denoted by “L1”, wherein
a distance between the forward end of the first carrier gas supply inlet and the forward end of the group-III element oxide gas supply inlet is denoted by “M1”, wherein
a diameter of the seed substrate is denoted by “k”, and wherein
following Eqs. (1) to (4),

0°<θ<90°  (1)

0.21≤S/k≤0.35  (2)

1.17≤(L1+M1)/k≤1.55  (3)

k=2*(L1+M1)/tan θ+S  (4), are satisfied.