Patent ID: 8097083

Claim:
An apparatus having a large dimension plasma enhanced atomic layer deposition cavity, comprising: a large dimension plasma enhanced atomic layer deposition cavity, defining a reaction space; a first gas supply source, connected to the large dimension plasma enhanced atomic layer deposition cavity, for providing a first gas; a second gas supply source, connected to the large dimension plasma enhanced atomic layer deposition cavity, for providing a second gas; a purifying gas supply source valve that receives a pneumatic valve frequency signal; a purifying gas supply source, connected to the large dimension plasma enhanced atomic layer deposition cavity via the purifying gas supply source valve, for providing a purifying gas; a sensor, interlinked with the reaction space of the large dimension plasma enhanced atomic layer deposition cavity, for sensing pressure in the reaction space; a rotatable throttle valve interlinked with the reaction space of the large dimension plasma enhanced atomic layer deposition cavity, the rotatable throttle valve being placed in a space within which the rotatable throttle rotates and having a rotatable shaft with a first blade, a second blade, and a third blade mounted thereon, the second blade and the third blade extending bi-laterally with respect to each other from the rotatable shaft and the first blade being arranged substantially perpendicular to the second blade and the third blade, the first blade being used for controlling an effective cross section of a gas transmitting pipe through which gas is exhausted from the reaction space, and the second and third blades being used for sealing a movement opening of the space when the first blade is oriented to a predetermined position with the first blade, the second blade, and the third blade collectively ensuring thorough gas exhaustion from the reaction space, the rotatable throttle valve being driven to rotate via linear movement of a bearing base controlled and driven by a step motor which drives one of a belt, chain, rack and screw rod to change a position of the bearing base; and a throttle valve controller that receives a pressure signal from the sensor and generating at least one control signal to control the throttle valve; wherein the at least one control signal generated by the throttle valve controller includes an adjusting pressure valve position signal for the rotatable throttle valve to control pressure in the transmitting gas pipe, and the rotatable throttle valve is rotatable 180 degrees to a side without any of the blades in an exhaust passage to increase a gas flow through an exhaust region.