Patent ID: 11967501
Assignee: KOKUSAI ELECTRIC CORPORATION
Field: Surface technology, coating (Chemistry)
Classification: CPC H  B  C | IPC B  C  H

Claim 13:
14. A substrate processing apparatus comprising:
a substrate retainer comprising:
a first substrate support region configured to support a first plurality of substrates;
a second substrate support region provided above the first substrate support region and configured to support a second plurality of substrates; and
a third substrate support region provided below the first substrate support region and configured to support a third plurality of substrates;

a process chamber in which the substrate retainer is accommodated;
a first gas supplier, a second gas supplier and a third gas supplier configured to supply gases into the process chamber and extending along the substrate retainer; and
a plurality of gas supply holes provided at each of the first gas supplier and the third gas supplier,
wherein the first gas supplier, the second gas supplier and the third gas supplier are provided in a same gas supply area,
wherein the plurality of gas supply holes of the first gas supplier are arranged corresponding to substrates supported in at least the second substrate support region and are not arranged corresponding to substrates supported in the first substrate support region,
wherein the plurality of gas supply holes of the third gas supplier are arranged corresponding to substrates supported in at least the third substrate support region and are not arranged corresponding to substrates supported in the first substrate support region, and
wherein the second gas supplier comprises a vertically elongated slit arranged corresponding to substrates supported in at least the first substrate support region,
wherein each of the first gas supplier and the third gas supplier comprises an ascending pipe and a descending pipe, and the ascending pipe of each of the first gas supplier and the third gas supplier comprises a first hole-free region where no gas supply hole is provided, the first hole-free region vertically extending across the first substrate support region,
wherein the vertically elongated slit of the second gas supplier extends from a lower end thereof to an upper end thereof, a height of a lower end of the vertically elongated slit is substantially the same as that of a lower end of the first hole-free region, and a height of an upper end of the vertically elongated slit is substantially the same as that of an upper end of the hole-free region, and
the second injector comprises a second hole-free region where no opening is provided, the second hole-free region vertically extending across a lower region of the substrate retainer.