Substrate processing device

Abstract

A substrate processing device comprises a reaction vessel 11 forming a space receiving a substrate 1 and adapted to have a plurality of reaction gases supplied thereto to perform desired processing of the substrate, an exhaust port 16 formed in the reaction vessel 11 for exhausting the reaction vessel 11 , and a gas supply system 70 A, 70 B for supplying at least a plurality of reaction gases into the reaction vessel 11 , the gas supply system 70 A, 70 B including a cleaning gas supply unit for supplying a cleaning gas to perform desired processing of the substrate 1 to thereby remove adherents in the reaction vessel 11 , and a post-processing gas supply unit for supplying a post-processing gas capable of removing the elements contained in the cleaning gas remaining in the reaction vessel 11 after the adherents have been removed by supplying the cleaning gas, the post-processing gas containing all of the reaction gases used in performing desired processing of the substrate.

1 . A substrate processing apparatus, comprising: 
 a reaction container which accommodates a substrate, to which a plurality of reaction gases are supplied, and which forms a space where said substrate is subjected to desired processing,    an exhaust port which is opened in said reaction container for exhausting gas from said reaction container, and    a gas supply system for supplying at least the plurality of reaction gases to said reaction container, wherein    said gas supply system comprises:    a cleaning gas supply unit for supplying cleaning gas which removes accretion adhering to an inner side of said reaction container by subjecting said substrate to the desired processing,    a post-processing gas supply unit for supplying post-processing gas which can remove an element included in the cleaning gas remaining in said reaction container after the accretion is removed by supplying the cleaning gas, and    said post-processing gas includes all reaction gases used when said substrate is subjected to the desired processing.    
   
   
       2 . A substrate processing apparatus as recited in  claim 1 , wherein said post-processing gas supply unit includes exclusive supply nozzles for independently supplying each of the reaction gases, and when the reaction gases are to be supplied as the post-processing gases, the reaction gases are alternately supplied from the exclusive supply nozzles.  
   
   
       3 . A substrate processing apparatus as recited in  claim 2 , wherein each of the reaction gases supplied from said post-processing gas supply unit remove the element remaining in said exclusive supply nozzles and said reaction container, and form a desired film in said reaction container.  
   
   
       4 . A substrate processing apparatus as recited in  claim 3 , wherein the plurality of reaction gases supplied from the exclusive supply nozzles are a gas including silicon, and ammonia gas activated by plasma.  
   
   
       5 . A substrate processing apparatus as recited in  claim 4 , wherein the cleaning gas is a gas including fluorine, and the gas including fluorine is supplied from the exclusive supply nozzle which supplies a gas including silicon.  
   
   
       6 . A substrate processing apparatus as recited in  claim 4  or  5 , wherein the gas including silicon is SiH 2 Cl 2 .  
   
   
       7 . A substrate processing apparatus as recited in  claim 5 , wherein the gas including fluorine is NF 3  or ClF 3 .  
   
   
       8 . A substrate processing apparatus which supplies a plurality of reaction gases alternately and forms a thin film on a substrate, comprising: 
 a reaction container,    a plurality of exclusive supply nozzles for respectively and exclusively supplying the plurality of the reaction gases, and    a control apparatus for controlling the substrate processing apparatus such that cleaning gas is supplied from one of the supply nozzles into said reaction container at the time of cleaning, all reaction gases used for processing a substrate are alternately supplied into said reaction container from the exclusive supply nozzles after the cleaning gas is supplied and before the substrate is processed.    
   
   
       9 . A substrate processing apparatus as recited in  claim 8 , further comprising a heating unit which heats an interior of said reaction container, wherein 
 a temperature in the reaction container when the plurality of reaction gases are supplied after the cleaning gas is supplied and before a substrate is processed, is set lower than a temperature in the reaction container when the cleaning is carried out.    
   
   
       10 . A substrate processing apparatus as recited in  claim 9 , further comprising a plasma producing unit which excites reaction gas with plasma, wherein 
 at least one of the plurality of reaction gases is excited with plasma by said plasma producing unit and is supplied from said supply nozzle.