Patent ID: 7088423
Filing Date: 2006-08-08
Classification: G03F

Abstract:
1. An edge exposing apparatus for performing edge exposure by emitting light to edge regions of substrates, comprising: first and second light emitting means for emitting light; control means for controlling the light emitting means; performance decrease detecting means for detecting a decrease in performance of the light emitting means; and ready state detecting means for detecting the light emitting means being in a ready state capable of performing edge exposure; wherein, when edge exposure is effected with the light emitted from the first light emitting means, the control means executes the following steps with respect to each of the light emitting means based on a detection made by said performance decrease detecting means of the first light emitting means having lowered in performance: (A) continuing the edge exposure with the first light emitting means, and starting the second light emitting means; and (B) terminating the edge exposure with the first light emitting means, and performing edge exposure with the second light emitting means, when said ready state detecting means detects the ready state of the second light emitting means.