Abstract:
A substrate carrier may include a carrier body and a first sensor unit. The carrier body may include an internal space, an inlet port and an outlet port. The internal space may be configured to receive a substrate. A purge gas may be introduced into the internal space through the inlet port. A gas in the internal space may be exhausted through the outlet port. The first sensor unit may be at the outlet port and configured to detect environmental properties of the internal space in real time. Thus, a generation or cause of a contaminant in the carrier body may be accurately identified.
Abstract:
A substrate carrier may include a carrier body and a first sensor unit. The carrier body may include an internal space, an inlet port and an outlet port. The internal space may be configured to receive a substrate. A purge gas may be introduced into the internal space through the inlet port. A gas in the internal space may be exhausted through the outlet port. The first sensor unit may be at the outlet port and configured to detect environmental properties of the internal space in real time. Thus, a generation or cause of a contaminant in the carrier body may be accurately identified.
Abstract:
In a method of detecting inhomogeneity of a layer, an incident light may be irradiated to at least two regions of the layer at a first incident angle position. First reflected lights reflected from the two regions of the layer may be sensed. The incident light may be irradiated to the at least two regions of the layer at a second incident angle position. Second reflected lights reflected from the two regions of the layer may be sensed. The first reflected lights and the second reflected lights may be compared with each other to obtain the inhomogeneity of the layer. Thus, the layer having a spot may be found.
Abstract:
In a method of detecting inhomogeneity of a layer, an incident light may be irradiated to at least two regions of the layer at a first incident angle position. First reflected lights reflected from the two regions of the layer may be sensed. The incident light may be irradiated to the at least two regions of the layer at a second incident angle position. Second reflected lights reflected from the two regions of the layer may be sensed. The first reflected lights and the second reflected lights may be compared with each other to obtain the inhomogeneity of the layer. Thus, the layer having a spot may be found.