Patent ID: 8308865
Filing Date: 2012-11-13
Classification: C23C

Abstract:
1. A showerhead for chemical vapor deposition comprising: a head storing reaction gas flowing thereinto and feeding the stored reaction gas to a reaction chamber; and at least one support member passing through and coupled with the head and an upper surface of the reaction chamber so as to support the head inside the reaction chamber and prevent the head from being bent downwards, wherein the head includes: a first head storing first reaction gas and spraying the first reaction gas downwards into the reaction chamber, the first head includes a first reservoir storing the first reaction gas, and at least one first spray nozzle feeding the reaction gas in the first reservoir to the reaction chamber; a second head storing second reaction gas and spraying the second reaction gas downwards into the reaction chamber, the second head includes a second reservoir storing the second reaction gas, and at least one second spray nozzle having a predetermined size through which the first spray nozzle passes, and a gas channel formed between the second spray nozzle and the first spray nozzle passing through the second spray nozzle and feeding the second reaction gas in the second reservoir to the reaction chamber; a third head installed above the upper surface of the reaction chamber, defining the first reservoir with the first head, and forming a cooling water channel between the third head and the upper surface of the reaction chamber; and a cooling water inflow pipe passing through the third head and disposed in the support member such that cooling water flows from an outside into the cooling water channel, wherein the gas channel includes a predetermined gap between an inner circumference of the second spray nozzle and an outer circumference of the first spray nozzle.