Patent ID: 8206562

Claim:
Apparatus for the application of a layer of material by sputter deposition onto an organic electroluminescent device, said device including an electroluminescent layer applied directly or indirectly to a substrate, said apparatus including a holder for the device and on which the device is located in a coating chamber, said coating chamber including at least one target of the material to be deposited onto the device, said target provided as part of an unbalanced magnetron, said coating chamber including at least one other magnetron and/or magnet array and wherein said magnetrons and/or magnet array are mutually located in the coating chamber such that the polarity of the outer or ring magnet of a first magnetron or magnet array is the opposite to the polarity of the outer or ring magnet of at least one magnetron or magnet array adjacent thereto and the material is applied with a material deposition energy in the coating chamber of less than 50 eV.