INLINE VACUUM PROCESSING APPARATUS AND METHOD FOR PROCESSING SUBSTRATES THEREIN
An inline vacuum processing apparatus for processing of substrates in vacuum comprises at least one load-lock chamber, at least two subsequent deposition chambers to be operated with essentially the same set of coating parameters and at least one unload-lock chamber plus means for transferring, post-processing and/or handling substrates through and in the various chambers. A method for depositing a thin film on a substrate in such processing system comprises the steps of introducing a first substrate into a load-lock chamber, lowering the pressure in said chamber; transferring the substrate into a first deposition chamber; depositing a layer of a first material on said first substrate using a first set of coating parameters; transferring said first substrate into a second, subsequent deposition chamber of said inline system without breaking vacuum and depositing a further layer of said first material on said first substrate using substantially the same set of parameters. Simultaneously to step f) a second substrate is being treated in said inline vacuum system according to step d).
1 . A method for depositing a thin film on a substrate in an inline vacuum processing system comprising the following steps:
a) introducing a first substrate into a load-lock chamber ( 2 ),
b) lowering the pressure in said chamber
c) transferring said first substrate into a first deposition chamber ( 4 )
d) depositing a layer of a first material at least partially on said first substrate using a first set of coating parameters
e) transferring said first substrate into a second, subsequent deposition chamber ( 5 ) of said inline system without breaking vacuum
f) depositing a further layer of said first material at least partially on said first substrate using substantially the same set of parameters
g) transferring said first substrate into a load lock chamber ( 10 )
h) removing said first substrate from said system wherein simultaneously to step f) a second substrate is being treated in said inline vacuum system according to step d)
2 . The method according to claim 1 , wherein said first set of deposition parameters comprises gas flow, chemical substances and pressure.
3 . The method according to claim 1 , wherein said depositing includes one of CVD, PECVD, LPCVD, PVD or reactive PVD.
4 . The method according to claim 1 , wherein step b) comprises an additional heating step of the substrate.
5 . The method according to claim 1 , wherein said at least partially deposited layer is deposited in equal 1/n parts of the desired overall thickness in said deposition chambers.
6 . The method according to claim 1 , wherein said method may use reactants like water in liquid or gaseous form, organometallic substances like diethylzinc (dez) and diboran as dopant.
7 . An apparatus for the inline vacuum processing of substrates comprising
At least one load-lock chamber ( 2 ),
At least two subsequent deposition chambers ( 4 , 5 ) to be operated with essentially the same set of coating parameters,
At least one unload-lock chamber ( 10 ) and
Means for transferring, post-processing and/or handling substrates through and in the various chambers
8 . Apparatus according to claim 7 , the deposition chambers further comprising means for substrate transport, said means being retractable wheels or rollers ( 36 ) and being vertically movable pins adapted to lift the substrate from the rollers.
9 . Apparatus according to claim 7 , wherein the deposition chambers ( 4 , 5 ) and the load and unload chambers ( 2 , 10 ) are being arranged subsequently in a straight line and that underneath the chambers, back-transport means ( 21 - 26 ) are being arranged for moving substrates in opposite direction with respect to the deposition process of the upper chambers.
10 . An apparatus according to claim 9 , wherein the load station comprises a lift or elevator for lifting the processed substrate from the back-transport means in order to receive the coated substrate at a site where at least a worker or a machine can handle it and stock it apart.