In situ adaptive masks
View Patent ↗A variable adaptive mask is provided that can be dynamically modified in situ in a physical vapor deposition process. The mask comprises a fixed mask portion, a plurality of channels extending through the fixed mask portion, a control mechanism for controlling throughput of a vaporized target material through the channels, and a mechanism to mount the mask in a fixed position relative to a solid target material and a substrate. In one embodiment, a magnetic control mechanism is provided to control throughput of the vaporized target material through the channels. In another embodiment, a thermal control mechanism is provided to control throughput of a vaporized target material through the channels. Methods of controlling a physical vapor deposition process using the adaptive mask are also disclosed.
1. A variable adaptive mask for use with a physical vapor deposition process, comprising:
a fixed mask portion that comprises a top layer and a bottom layer;
a plurality of channels extending through the fixed mask portion;
a first plurality of wires positioned on the bottom layer, each wire of the first plurality of wires being disposed in a substantially spiral arrangement about a respective channel;
a second plurality of wires positioned on the top layer, each wire of the second plurality of wires being disposed in a substantially spiral arrangement about a respective channel; and
means for mounting the mask in a fixed position relative to a solid target material and a substrate.
2. The mask of claim 1 , wherein the channels have a circular profile.
3. The mask of claim 1 , wherein the channels have a rectangular profile.
4. The mask of claim 1 , wherein the wires generate a magnetic field in the channels when electrical current is passed through the wires.
5. The mask of claim 4 , wherein the wires are electrically connected to a computer or integrated circuit such that the magnetic field can be precisely controlled.
6. The mask of claim 1 , farther comprising a hard ferromagnetic material placed within the channels.
7. The mask of claim 1 , wherein the means for mounting comprises at least one mounting hole in the fixed mask portion.
8. The mask of claim 1 , further comprising a calibration scale on the fixed mask portion.
9. A variable adaptive mask for use with a physical vapor deposition process, comprising:
a fixed mask portion including a calibration scale;
a plurality of channels extending through the fixed mask portion;
a plurality of wires positioned on the fixed mask portion, each wire of the plurality of wires being disposed in a substantially spiral arrangement about a respective channel; and
one or more mounting holes for mounting the mask in a fixed position relative to a solid target material and a substrate.
10. The mask of claim 8 , wherein the channels are defined by a top layer and a bottom layer of the fixed mask portion.
11. The mask of claim 9 , wherein the wires generate a magnetic field in the channels when electrical current is passed through the wires.
12. The mask of claim 11 , wherein the wires are electrically connected to a computer or integrated circuit such that the magnetic field can be precisely controlled.
13. The mask of claim 9 , further comprising a hard ferromagnetic material placed within the channels.