Patent ID: 9589822
Date: 2017-03-07
CPC Classifications: H01L

Claim:
1. A substrate transfer method comprising: a step of placing a first substrate and a second substrate on a first alignment part and a second alignment part which are arranged to be vertically spaced from each other, respectively, by using a first pick and a second pick for holding the first substrate and the second substrate to be vertically spaced from each other, respectively; a first positioning step of positioning the first pick at a first reception position determined based on an alignment position for the first substrate aligned by the first alignment part; a first receiving step of receiving the first substrate from the first alignment part by moving the first pick vertically; a second positioning step of positioning the second pick at a second reception position determined based on an alignment position for the second substrate aligned by the second alignment part; and a second receiving step of receiving the second substrate from the second alignment part by moving the second pick vertically; wherein a first distance between the bottom surface of the first substrate held on the first pick and the bottom surface of the second substrate held on the second pick is different from a second distance between the bottom surface of the first substrate placed on the first alignment part and the bottom surface of the second substrate placed on the second alignment part; wherein the second positioning step is performed by moving the first pick and the second pick horizontally in a state where the first pick holds the first substrate; and wherein the first pick and the second pick are provided on a same arm and are simultaneously moved in a same direction.