Substrate processing apparatus and substrate transferring method

1. A substrate processing apparatus, comprising:

a substrate holding and rotating mechanism, having a spin base arranged to rotate around an axis of rotation, for holding and rotating a substrate;

at least two positioning members provided on the substrate holding and rotating mechanism for positioning the substrate at a predetermined substrate holding position, the positioning members being fixed to the spin base such that the positioning members are unmovable relative to the spin base, with a first distance between the positioning members;

a substrate transfer mechanism for transferring the substrate to the substrate holding and rotating mechanism;

a pressing unit disposed on the substrate transfer mechanism for pressing the substrate toward the positioning members in a pressing direction; and

a control unit programmed to execute a step of pressing a substrate to the positioning members by use of the pressing unit disposed on the substrate transfer mechanism, wherein

the substrate transfer mechanism includes a substrate holding hand for holding the substrate,

the substrate holding hand includes a substrate contact portion provided at a base end of the substrate holding hand and arranged to come in contact with an end face of the substrate, and a pair of support members provided at a tip end of the substrate holding hand with a second distance between said support members longer than the first distance,

the pressing unit includes a substrate-contact-portion moving mechanism for moving the substrate contact portion toward the positioning members, and

the at least two positioning members are disposed between the pair of support members when viewed in the pressing direction.

2. A substrate processing apparatus according to claim 1 , wherein

the substrate-contact-portion moving mechanism comprises a hand driving mechanism for moving the substrate holding hand toward the positioning member.

3. A substrate processing apparatus according to claim 2 , wherein the substrate-contact-portion moving mechanism further comprises a relative moving mechanism for relatively moving the substrate contact portion with respect to the substrate holding hand.

4. A substrate processing apparatus according to claim 1 , wherein

the substrate-contact-portion moving mechanism comprises a relative moving mechanism for relatively moving the substrate contact portion with respect to the substrate holding hand.

5. A substrate processing apparatus according to claim 1 , further comprising a to-be-positioned substrate supporting portion for supporting the substrate movably toward the positioning member at a position where an end face of the substrate is opposite to the positioning member.

6. A substrate processing apparatus according to claim 5 , wherein the to-be-positioned substrate supporting portion is disposed on the substrate holding and rotating mechanism.

7. A substrate processing apparatus according to claim 5 , wherein the to-be-positioned substrate supporting portion is disposed on the substrate transfer mechanism.

8. A substrate processing apparatus according to claim 1 , wherein the substrate holding and rotating mechanism comprises a to-be-processed substrate supporting portion for supporting the substrate while coming in contact with one surface of the substrate when the substrate is processed.

9. A substrate processing apparatus according to claim 8 , further comprising a fluid supply unit for supplying a fluid to the other surface of the substrate supported by the to-be-processed substrate supporting portion, such that the substrate is pressed to the to-be-processed substrate supporting portion.