Patent ID: 6621553
Filing Date: 2003-09-16
Classification: C23F,G03F

Abstract:
An apparatus for exposing first and second sides of a plurality of substrates to radiation through first and second masks, the apparatus comprising:a first substrate holder comprising at least three extendable chucks, each adapted to hold a substrate and mounted about a first axis such that the at least three chucks are capable of rotation about the first axis between at least first, second and third chuck positions; a first mask holder adjacent the second chuck position of the first substrate holder and adapted to hold the first mask; a second substrate holder comprising at least three extendable chucks, each adapted to hold a substrate and mounted about a second axis such that the at least three chucks are capable of rotation about the second axis between at least first, second and third chuck positions, the first chuck position of the second substrate holder being adjacent the third chuck position of the first substrate holder; a second mask holder adjacent the second chuck position of the second substrate holder and adapted to hold the second mask; and at least one radiation source for emitting radiation through the first and second masks toward the chucks in the second chuck position of each of the first and second substrate holders.