Patent ID: 7477959

Claim:
A method comprising: obtaining barcode data on a photoresist bottle in response to initiating a photoresist bottle switching operation by an operator; then obtaining photoresist data relating to the photoresist bottle as indicated by the barcode data of the photoresist bottle, said photoresist data obtained from a database in response to obtaining the barcode data, said database comprising information on a plurality of photoresists associated with respective photoresist bottles and respective barcode data; then determining whether the photoresist bottle contains appropriate photoresist based on the photoresist data; in response to determining that the photoresist bottle contains appropriate photoresist, storing an expiration date of the photoresist bottle and a batch identifier of the photoresist bottle as indicated by the barcode data of the photoresist bottle in the database; and, in response to determining that the photoresist bottle contains inappropriate photoresist, acting to prevent semiconductor processing of semiconductor waters utilizing the inappropriate photoresist contained in the photoresist bottle.