Patent ID: 11958087
Assignee: SCREEN HOLDINGS CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC B  H | IPC B

Claim 4:
5. A substrate processing method comprising:
a sulfuric acid immersing step of immersing a plurality of substrates in a sulfuric acid-containing liquid within a sulfuric acid vessel;
a transporting step of taking out the substrates from the sulfuric acid vessel and transporting the substrates to an ozone gas treatment unit; and
an ozone exposing step of exposing the substrates transported to the ozone gas treatment unit to an ozone-containing gas,
wherein the sulfuric acid immersing step includes a vertical immersing step of immersing the substrates in the sulfuric acid-containing liquid within the sulfuric acid vessel while holding the substrates in a vertical attitude,
the substrate processing method further comprising an attitude changing step of changing attitude of the substrates taken out of the sulfuric acid vessel from the vertical attitude to a horizontal attitude,
wherein the ozone exposing step includes a horizontal exposing step of exposing the substrates to the ozone-containing gas while holding the substrates in the horizontal attitude.