Cylindrical evaporation source
Cylindrical evaporation source which includes, at an outer cylinder wall, target material to be evaporated as well as a first magnetic field source and a second magnetic field source which form at least a part of a magnet system and are arranged in an interior of the cylindrical evaporation source for generating a magnetic field. In this respect, first magnetic field source and second magnetic field source are provided at a carrier system such that a shape and/or a strength of the magnetic field can be set in a predefinable spatial region in accordance with a predefinable scheme. In embodiments, the carrier system is configured for setting the shape and/or strength of the magnetic field of the carrier system such that the first magnetic field source is arranged at a first carrier arm and is pivotable by a predefinable pivot angle (α 1 ) with respect to a first pivot axis.
1. A cylindrical evaporation source comprising:
a target material arranged on an outer cylindrical wall;
a carrier system yoke disposed inside the outer cylindrical wall and being elongate when viewed from an axial direction of the outer cylindrical wall;
said carrier system yoke having an outer end, an inner end arranged closer to a center of the outer cylindrical wall than the outer end, and first and second opposite sides;
a magnet system comprising:
an elongate first magnetic field source being elongate when viewed from an axial direction of the outer cylindrical wall and being disposed inside the outer cylindrical wall, said elongate first magnetic field source having a first end spaced from a center of the elongate first magnetic source and an oppositely arranged free end spaced from the center of the elongate first magnetic source; and
an elongate second magnetic field source being elongate when viewed from an axial direction of the outer cylindrical wall and being disposed inside the outer cylindrical wall, said elongate second magnetic field source having a first end spaced from a center of the second magnetic source and an oppositely arranged free end spaced from the center of the second magnetic source;
the first magnetic field source pivoting with respect to the carrier system yoke about a first axis;
said free end of the first magnetic field source being movable from a first angular position relative to the first opposite side of the carrier system yoke to a second smaller angular position that is alongside the first opposite side;
the second magnetic field source pivoting with respect to the carrier system yoke about a second axis; and
said free end of the second magnetic field source being movable from a first angular position relative to the second opposite side of the carrier system yoke to a second smaller angular position that is alongside the second opposite side,
wherein the first and second axes are spaced from each other and are offset from a center axis of the outer cylindrical wall.
2. The evaporation source of claim 1 , further comprising:
a first pivotally movable carrier arm that supports or is coupled to the first magnetic field source; and
a second pivotally movable carrier arm that supports or is coupled to the second magnetic field source.
3. The evaporation source of claim 1 , wherein the carrier system yoke is configured to set a position of each of the first and second magnetic field sources relative to the outer cylindrical wall.
4. The evaporation source of claim 1 , wherein each of the first and second magnetic field sources are movable relative to the outer cylindrical wall in order to change a shape and/or a strength of a magnetic field produced by the first and second magnetic field sources.
5. The evaporation source of claim 1 , wherein each of the first and second magnetic field sources are movable:
independent of one another; or
independent of one another in order to change a shape and/or a strength of a magnetic field produced by the first and second magnetic field sources.
6. The evaporation source of claim 1 , wherein the first and second magnetic field sources respectively comprise first and second pivotally movable carrier arms and that pivot between a predetermined angular range.
7. The evaporation source of claim 1 , wherein the magnet system further comprises one of:
a first magnetic element; and
a first magnetic element that is movable one of:
linearly;
perpendicular to a center axis of the outer cylindrical wall; and
towards and away from a center axis of the outer cylindrical wall.
8. The evaporation source of claim 7 , wherein the magnet system further comprises one of:
a second magnetic element; or
a second magnetic element that is movable one of:
linearly;
perpendicular to a center axis of the outer cylindrical wall; and
towards or away from a center axis of the outer cylindrical wall.
9. The evaporation source of claim 8 , wherein either of the first and second magnetic elements comprises one of:
a permanent magnet;
a ferrite; and/or
an electromagnet.
10. The evaporation source of claim 2 , wherein each of the first and second pivotally movable carrier arms respectively pivot about the first and second axes.
11. The evaporation source of claim 1 , wherein the center axis of the outer cylindrical wall is parallel with a rotation axis of the carrier system yoke.
12. The evaporation source of claim 1 , wherein the carrier system yoke is movable parallel to the center axis.
13. The evaporation source of claim 1 , wherein the carrier system yoke is rotatable between a predetermined angular range about the center axis.
14. The evaporation source of claim 1 , wherein the carrier system yoke is tiltable about a tilt axis of the carrier system.
15. The evaporation source of claim 14 , wherein the tilt axis is spaced from the center axis.
16. The evaporation source of claim 1 , wherein the carrier system yoke comprises:
a ferrite material.
17. The evaporation source of claim 1 , wherein either of the first and second magnetic field sources comprises one of:
a permanent magnet;
a ferrite; and/or
an electromagnet.
18. The evaporation source of claim 1 , wherein the magnet system is one of:
a balanced magnetron; or
an unbalanced magnetron.
19. The evaporation source of claim 1 , wherein the evaporation source is one of:
an evaporation cathode;
an evaporation anode;
an atomization cathode;
an arc evaporation source; or
an arc cathode.
20. A cylindrical evaporation source comprising:
a target material arranged on a rotatable outer cylindrical wall;
a movable carrier system yoke disposed inside the outer cylindrical wall;
said carrier system yoke having an outer end, an inner end arranged closer to a center of the outer cylindrical wall than the outer end, and first and second opposite facing sides;
a magnet system mounted to the carrier system and comprising:
a first pivotally mounted magnetic field source disposed inside the outer cylindrical wall and having a first end and a free end arranged opposite the first end;
the first end and the free end of the first magnetic field source being spaced by different distances from a pivot axis of the first magnetic field source;
a second pivotally mounted magnetic field source disposed inside the outer cylindrical wall and having a first end and a free end arranged opposite the first end;
the first end and the free end of the second magnetic field source being spaced by different distances from a pivot axis of the second magnetic field source;
the free end of the first pivotally mounted magnetic field source pivoting towards the first opposite facing side and away from the outer cylindrical wall and vice versa; and
the free end of the second pivotally mounted magnetic field source pivoting towards the second opposite facing side and away from the outer cylindrical wall and vice versa,
wherein one of:
a spacing distance between the first and second opposite facing sides is less than a spacing distance between the pivot axes of the first and second magnetic field sources, or
a spacing distance between the free ends of the first and second magnetic field sources is greater than a spacing distance between the first and second opposite facing sides.
21. A cylindrical evaporation source comprising:
a target material arranged on an outer cylindrical wall;
a carrier system yoke disposed inside the outer cylindrical wall;
said carrier system yoke having first and second opposite sides;
a center axis of the outer cylindrical wall passing through the carrier system yoke;
a magnet system comprising:
a first magnetic field source disposed inside the outer cylindrical wall; and
a second magnetic field source disposed inside the outer cylindrical wall; the first magnetic field source pivoting with respect to the carrier system yoke about a first axis between a first position and a position that is alongside the first opposite side;
the second magnetic field source pivoting with respect to the carrier system yoke about a second axis between a first position and a position alongside the second opposite side; and
wherein the first and second axes are spaced from each other and are offset from the center axis of the outer cylindrical wall,
wherein, in the first position, a spacing distance between the free ends of the first and second magnetic field sources is greater than a spacing distance between the first and second opposite sides.