Patent ID: 7531470
Filing Date: 2009-05-12
Classification: B08B,C23C,H01L

Abstract:
1. A method of forming an electronic device comprising: (a) sequentially advancing a substrate through a plurality of vacuum deposition vessels positioned along a fabrication path, wherein each deposition vessel includes (i) a material deposition source including deposition material, (ii) a first shadow mask positioned within the deposition vessel, the first shadow mask having a predetermined pattern of apertures therethrough, (iii) a first cleaning vessel positioned adjacent the deposition vessel, and (iv) a second cleaning vessel positioned adjacent the deposition vessel, wherein: (b) cleaning the second shadow mask positioned in the second cleaning vessel concurrently with depositing the deposition material through the predetermined pattern of apertures of the first shadow mask and onto the substrate; (c) moving the first shadow mask along the cleaning path from the deposition vessel to the first cleaning vessel and moving the second shadow mask along the cleaning path from the second cleaning vessel to the deposition vessel; and (d) cleaning the first shadow mask positioned in the first cleaning vessel concurrently with depositing the deposition material through the predetermined pattern of apertures of the second shadow mask and onto the substrate.