Patent ID: 8529832

Claim:
A method for sterilization using hydrogen peroxide and ozone, in the sequence set forth, comprising: a first sterilization step of providing a sterilization subject in a sealed sterilization chamber and sterilizing the sterilization subject by providing ozone inside the sterilization chamber; a first decomposition step of decomposing the ozone inside the sterilization chamber; a first vacuumization step discharging the gas inside the sterilization chamber and reducing the pressure inside the sterilization chamber; a second sterilization step of providing hydrogen peroxide into the vacuumized sterilization chamber to sterilize the sterilization subject; a third sterilization step of providing ozone into the sterilization chamber; a second decomposition step of decomposing the hydrogen peroxide and the ozone inside the sterilization chamber; a second vacuumization step of discharging the gas inside the sterilization chamber and reducing the pressure inside the sterilization chamber; wherein the first sterilization step and the third sterilization step are carried out under the condition where the pressure inside the sterilization chamber is atmospheric pressure or higher, and the ozone provided in the first sterilization step and the third sterilization step is produced by converting an oxygen-containing substance outside the sterilization chamber or oxygen contained inside the sterilization chamber; and wherein said method does not involve plasma inside the sterilization chamber.