Patent ID: 11887817
Assignee: TOKYO ELECTRON LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. The plasma processing apparatus according to claim 1, wherein the power source system comprises:
a first direct current power source including a positive terminal connected to a ground;
a first circuit configured to generate the first pulse from a negative voltage output from a negative terminal of the first direct current power source;
a second direct current power source including a negative terminal connected to a ground;
a second circuit configured to generate a single pulse from a positive voltage output from a positive terminal of the second direct current power source;
a third direct current power source including a positive terminal connected to a ground; and
a third circuit configured to generate the second pulse from a negative voltage output from a negative terminal of the third direct current power source, wherein
the first circuit includes:
one or more first switching transistor connected in series between the positive terminal of the first direct current power source and a first node;
one or more second switching transistor connected in series between the negative electrode of the first direct current power source and the first node;
a first diode having a cathode connected to the positive terminal of the first direct current power source and an anode connected to a second node which is connected to the first node;
a second diode having a cathode connected to the second node and an anode connected to the negative terminal of the first direct current power source; and
an additional switching transistor connected between the second node and a common node, the common node being connected to the electrode of the substrate support,

the second circuit includes:
one or more third switching transistor connected in series between the positive terminal of the second direct current power source and a third node;
one or more fourth switching transistor connected in series between the negative electrode of the second direct current power source and the third node;
a third diode having a cathode connected to the positive terminal of the second direct current power source and an anode connected to a fourth node which is connected to the third node and the electrode of the substrate support; and
a fourth diode having a cathode connected to the fourth node and an anode connected to the negative terminal of the second direct current power source, and

the third circuit includes:
one or more fifth switching transistor connected in series between the positive terminal of the third direct current power source and a fifth node;
one or more sixth switching transistor connected in series between the negative electrode of the third direct current power source and the fifth first node;
a fifth diode having a cathode connected to the positive terminal of the third direct current power source and an anode connected to a sixth node which is connected to the fifth node;
a sixth diode having a cathode connected to the sixth node and an anode connected to the negative terminal of the third direct current power source; and
an additional switching transistor connected between the sixth node and the common node.