Vacuum pumping system, driving method thereof, apparatus having the same, and method of transferring substrate using the same
An apparatus includes a transfer unit under an atmospheric condition and having a robot therein; and at least one process chamber connected to one side of the transfer unit with a slot valve there between, and being alternately under a vacuum condition and under an atmospheric condition.
1. An apparatus, comprising:
a transfer unit under an atmospheric condition and having a robot therein;
at least one process chamber connected to one side of the transfer unit with a slot valve therebetween, the at least one process chamber being cycled between atmospheric and vacuum pressures;
an exhaust line connected to the process chamber;
a booster pump and a dry pump sequentially equipped to the exhaust line;
a bypass line detouring the booster pump, wherein one end of the bypass line is connected to the exhaust line between the booster pump and the dry pump, and the other end of the bypass line is connected to the exhaust line ahead of the booster pump; and
a first three-way valve between the booster pump and the dry pump and a second three-way valve ahead of the booster pump, wherein the one end and the other end of the bypass line are connected to the first and second three-way valves, respectively, wherein a valve is disposed between the second three-way valve and the booster pump and a slow pumping line is connected to the second three-way valve and the bypass line, and wherein the slow pumping line has a smaller diameter than the bypass line.
2. The apparatus according to claim 1 , wherein a first valve for isolating the booster pump is equipped between a divergence point of the bypass line diverging from the exhaust line and the booster pump, and a second valve is set up in the bypass line.
3. The apparatus according to claim 1 , further comprising at least one venting line connected to the process chamber and a venting gas storing unit; and a first heating unit set up in the middle of the at least one venting line.
4. The apparatus according to claim 1 , wherein the apparatus includes more than two venting lines connected to the process chamber symmetrically with respect to a center of the process chamber.
5. The apparatus according to claim 1 , further comprising at least one load port connected to another side of the transfer unit.
6. The apparatus according to claim 1 , wherein the robot performs at least one of a rotary motion and a linear motion.
7. An apparatus, comprising:
a transfer unit under an atmospheric condition and having a robot therein;
at least one process chamber connected to one side of the transfer unit with a slot valve therebetween, the at least one process chamber cycled between atmospheric and vacuum pressures;
at least one venting line connected to the process chamber and a venting gas storing unit; and
a first heating unit set up in the middle of the at least one venting line, wherein a valve is set up in the at least one venting line between the first heating unit and the process chamber, and at least one expansion unit is equipped between the valve and the process chamber.
8. The apparatus according to claim 7 , wherein a second heating unit is connected to the at least one expansion unit.