Ricoh Company, Ltd.

Tetsuya Takahashi

Akira Takahashi

Seiji Sarayama

Hirokazu Iwata

Minoru Fukuda

A method for manufacturing a group III nitride crystal on a seed crystal in a holding vessel holding therein a melt containing a group III metal, an alkali metal and nitrogen. The manufacturing method comprises the steps of causing the seed crystal to make a contact with the melt, setting an environment of the seed crystal to a first state offset from a crystal growth condition while in a state in which said seed crystal is in contact with the melt, increasing a nitrogen concentration in the melt, and setting the environment of the seed crystal to a second state suitable for crystal growth when the nitrogen concentration of the melt has reached a concentration suitable for growing the seed crystal.

Manufacturing method and manufacturing apparatus of a group III nitride crystal, utilizing a melt containing a group III metal, an alkali metal, and nitrogen

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Osaka, Japan

Tetsuya Takahashi