A chemical vapour deposition head comprising a solid body having: - at least a first opening for receiving a first input gas flow conveying a first precursor, a second opening for receiving a second input gas flow conveying a second precursor, a third opening for receiving a third input inert gas flow and a fourth opening for discharging a fourth gas flow; - an output face bearing a plurality of orifices (FP1, FP2, FI, FE1, FE2); and - a network of distribution ducts (CP1, CP2, CI, CE1, CE2), formed inside the solid body, linking each opening to at least one of said orifices; wherein each orifice linked to the first opening is separated from the or each closest orifice linked to the second opening by at least one orifice linked to the third opening and by two orifices linked to the fourth opening, arranged on either side of the orifice linked to the third opening; characterised in that the solid body is produced in a single piece by additive manufacturing, the network of distribution ducts being formed by cavities formed in said piece and in that the deposition head also comprises at least one first reservoir and one second reservoir (B1, B2; BI1, BI2, BI3), linked respectively to the first and to the second opening by respective output ducts, each said reservoir comprising a hollow volume capable of containing a precursor in the liquid or solid state (PL1, PL2) and an input duct arranged so that a gas flow injected into the input duct enters into contact with the precursor before arriving at the respective output duct, the first and the second reservoirs, and the input and output ducts, being produced in a single piece with the solid body by additive manufacturing. - at least a first opening for receiving a first input gas flow conveying a first precursor, a second opening for receiving a second input gas flow conveying a second precursor, a third opening for receiving a third input inert gas flow and a fourth opening for discharging a fourth gas flow; - an output face bearing a plurality of orifices (FP1, FP2, FI, FE1, FE2); and - a network of distribution ducts (CP1, CP2, CI, CE1, CE2), formed inside the solid body, linking each opening to at least one of said orifices; wherein each orifice linked to the first opening is separated from the or each closest orifice linked to the second opening by at least one orifice linked to the third opening and by two orifices linked to the fourth opening, arranged on either side of the orifice linked to the third opening; characterised in that the solid body is produced in a single piece by additive manufacturing, the network of distribution ducts being formed by cavities formed in said piece and in that the deposition head also comprises at least one first reservoir and one second reservoir (B1, B2; BI1, BI2, BI3), linked respectively to the first and to the second opening by respective output ducts, each said reservoir comprising a hollow volume capable of containing a precursor in the liquid or solid state (PL1, PL2) and an input duct arranged so that a gas flow injected into the input duct enters into contact with the precursor before arriving at the respective output duct, the first and the second reservoirs, and the input and output ducts, being produced in a single piece with the solid body by additive manufacturing. wherein each orifice linked to the first opening is separated from the or each closest orifice linked to the second opening by at least one orifice linked to the third opening and by two orifices linked to the fourth opening, arranged on either side of the orifice linked to the third opening; characterised in that the solid body is produced in a single piece by additive manufacturing, the network of distribution ducts being formed by cavities formed in said piece and in that the deposition head also comprises at least one first reservoir and one second reservoir (B1, B2; BI1, BI2, BI3), linked respectively to the first and to the second opening by respective output ducts, each said reservoir comprising a hollow volume capable of containing a precursor in the liquid or solid state (PL1, PL2) and an input duct arranged so that a gas flow injected into the input duct enters into contact with the precursor before arriving at the respective output duct, the first and the second reservoirs, and the input and output ducts, being produced in a single piece with the solid body by additive manufacturing.