Patent ID: 7030401

Claim:
An assembly of a substrate measurement system comprising a first measurement chamber, and a substrate handling chamber provided with a substrate transfer and at least one substrate container interface for receiving a substrate container, said substrate handling chamber being provided with a first mechanical interface to connect to the first measurement chamber, said first measurement chamber comprising a measurement instrument and being provided with a second mechanical interface to connect to said substrate handling chamber, and said substrate transfer being arranged to transfer substrates between said substrate container and said first measurement chamber through said substrate handling chamber, characterised in that a second measurement chamber is provided, which fits within the same dimensions as said first measurement chamber and is provided with the same identical second mechanical interface as said first measurement chamber to replace said first measurement chamber, and wherein said substrate container interfaces, and said first mechanical interface of the substrate handling chamber are identical so that each of said interfaces can connect at choice either to the interface of a substrate container or to the second mechanical interface of a measurement chamber.