Deposition method using a uniform electric field
View Patent ↗A deposition method includes placing a substrate on a susceptor inside a chamber, the susceptor including a center pin passing through the susceptor for lifting the substrate, energizing an electrode to applying a uniform electric field to the substrate, electrically connecting a ground member extending along and attached to an entire axial length of the center pin to a ground voltage source, and forming a film on the substrate by chemical vapor deposition.
1. A deposition method, comprising the steps of:
placing a substrate on a susceptor inside a chamber, the susceptor including a center pin passing through the susceptor for lifting the substrate up and down;
applying a first voltage source to the susceptor;
electrically connecting a connection member extending along and attached to an entire axial length of the center pin to the first voltage source;
applying a second voltage source to a counter electrode to generate a uniform electric field between the counter electrode and the substrate; and
forming a film on the substrate by chemical vapor deposition.
2. The method according to claim 1 , wherein placing of the substrate includes positioning the substrate in contact with a head portion of the center pin, the head portion being supported by a head supporter.
3. The method according to claim 2 , wherein the connection member is formed between the head portion and the head supporter.
4. The method according to claim 2 , wherein the connection member passes through a center portion of the head supporter.
5. The method according to claim 2 , wherein the connection member is formed along one side of the head supporter.
6. The method according to claim 2 , wherein the head portion includes aluminum.
7. The method according to claim 2 , wherein the head supporter includes a ceramic material.
8. The method according to claim 2 , wherein the head portion is formed with a conductive material, and the head supporter is formed with a material having a low coefficient of thermal expansion.
9. The method according to claim 2 , wherein the head portion is coated with an insulating material.
10. The method according to claim 1 , wherein the connection member includes an electrically conductive metal.
11. The method according to claim 1 , further comprising heating the substrate.
12. The method according to claim 11 , wherein heating the substrate includes energizing a heating coil within the susceptor.