Deposition of ordered crystalline films
First Claim
Patent Images
1. Apparatus for forming films of ordered polycrystalline material, comprising:
- a cross-field radio frequency magnetron sputtering apparatus having a chamber adapted for the removal of material from a hollow cylindrical target cathode by ionic bombardment and for the deposition of said material on the surface of a selected object, wherein the elements for sputtering include said cathode and a central disk type anode, both mounted at the top of said chamber spaced apart from each other by a small distance;
a fixture for supporting said selected object spaced apart from said sputtering elements by a significant distance, said fixture having means for mounting said selected object disposed at an angle relative to said sputtering elements, wherein said angle is selected to cause the net flux of said material from said cathode to be received by said selected object substantially normal to its upper surface; and
means for deflecting charged particles away from said selected object, said deflecting means comprising an electrode disposed on said fixture in the vicinity of a mounting location for said selected object, wherein said electrode is electrically isolated from said sputtering elements; and
means for applying a fixed electric potential to said electrode.
1 Assignment
0 Petitions
Accused Products
Abstract
Deposition of ordered polycrystalline films of zinc oxide and other materials having a strongly preferred crystal growth direction and a high degree of symmetry about the preferred direction is achieved consistently by disposing a charged electrode in a sputtering chamber to limit bombardment of the film and underlying substrate by charged particles.
-
Citations
29 Claims
-
1. Apparatus for forming films of ordered polycrystalline material, comprising:
-
a cross-field radio frequency magnetron sputtering apparatus having a chamber adapted for the removal of material from a hollow cylindrical target cathode by ionic bombardment and for the deposition of said material on the surface of a selected object, wherein the elements for sputtering include said cathode and a central disk type anode, both mounted at the top of said chamber spaced apart from each other by a small distance; a fixture for supporting said selected object spaced apart from said sputtering elements by a significant distance, said fixture having means for mounting said selected object disposed at an angle relative to said sputtering elements, wherein said angle is selected to cause the net flux of said material from said cathode to be received by said selected object substantially normal to its upper surface; and means for deflecting charged particles away from said selected object, said deflecting means comprising an electrode disposed on said fixture in the vicinity of a mounting location for said selected object, wherein said electrode is electrically isolated from said sputtering elements; and means for applying a fixed electric potential to said electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A method of forming a film of ordered polycrystalline material on a selected object in a cross-field radio frequency magnetron sputtering chamber having sputtering elements in the ceiling thereof, said method comprising the steps of:
-
orienting a line normal to the deposition surface of said selected object at an angle of about sixty degrees away from the vertical; and deflecting charged particles away from said selected object by means of a positively charged electrode disposed in the vicinity of said selected object and spaced a significant distance away from said sputtering elements, wherein said electrode is electrically isolated from said sputtering elements. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
-
Specification