Patent ID: 8367431

Claim:
A manufacturing method of a semiconductor photonic device substrate using an MOCVD equipment, wherein, before multi-layer films different in material composition are successively and gradually crystal-grown in one chamber, a process comprising: a first step of defining, by statistical analysis, an inter-layer growth rate model showing a relation in growth rate between each layer as a linear relation; a second step of obtaining a growth rate of a film corresponding to at least one or more layers by actual crystal growth using an individual substrate; a third step of directly calculating a growth rate of a film corresponding to other layers from the growth rate obtained in the second step by using the inter-layer growth rate model; and a fourth step of calculating a growth time in accordance with a film thickness of each layer of the semiconductor photonic device substrate based on the growth rate actually obtained in the second step and the growth rate calculated in the third step is carried out by using a computer system connected to the MOCVD equipment, and through the process above a crystal growth of the semiconductor photonic device substrate is performed.