Apparatus, method and reaction chamber

1. A reaction chamber for receiving one or more substrates to be processed by subjecting at least part of the substrates to successive surface reactions of at least a first precursor and a second precursor, the reaction chamber being configured to be a detachable reaction chamber and comprising:

a chamber body forming a reaction space inside the reaction chamber;

a loading door provided to the chamber body for loading and unloading the one or more substrates into and from the reaction chamber;

precursor connections attached to the reaction chamber for providing a fluid connection between the reaction space of the reaction chamber and precursor system connections of a precursor system by supplying and discharging the at least first and second precursor to and from the reaction space of the reaction chamber, the precursor connections are arranged to be connected to the precursor system connections of the precursor system;

couplings provided to the precursor connections for connecting the reaction chamber in fluid connection with the precursor system; and

gas valves for closing the precursor connections in a gastight manner, wherein:

the precursor connections are provided with the gas valves arranged to hermetically seal the precursor connections and the reaction space inside the reaction chamber when the precursor connections are detached from the precursor system connections and the reaction chamber is detached from the precursor system;

the loading door comprises one or more sealing elements arranged to seal the loading door and the reaction space inside the reaction chamber hermetically in a closed position of the loading door when the reaction chamber is in the detached state, and

the precursor connections being attached to the reaction chamber and the gas valves being attached to the precursor connections when the precursor connections are detached from the precursor system connections and the reaction chamber is detached from the precursor system,

the gas valves remain coupled to the reaction chamber through the precursor connections when the reaction chamber is detached from the precursor system.

2. The reaction chamber according to claim 1 , wherein:

the sealing element is a sealing profile, sealing ring, sealing strip, metal seal.

3. The reaction chamber according to claim 2 , wherein the loading door is a detachable lid or a hatch movable between the closed position and an open position, or a gate valve which may be opened and closed.

4. The reaction chamber according claim 1 , wherein:

the precursor connections comprise at least one inlet connection for supplying at least the first and second precursor into the reaction chamber; or

the precursor connections comprise at least one outlet connection for discharging at least the first and second precursor from the reaction chamber; or

the precursor connections comprise at least one inlet connection for supplying at least the first and second precursor into the reaction chamber and at least one outlet connection for discharging at least the first and second precursor from the reaction chamber.

5. The reaction chamber according to claim 1 , wherein the reaction chamber is provided vacuum tight or over pressure tight, or both vacuum tight and over pressure tight.

6. The reaction chamber according to claim 1 , wherein leakage of the reaction chamber is smaller than 1×10 −3 mbarcm 3 /s when hermetically sealed in the detached state.