Patent ID: 8906706
Filing Date: 2014-12-09
Classification: G11B,H01F,H01L,Y10T

Abstract:
1. A method of fabricating a mask structure, comprising: providing a mask comprising two or more film layers; providing a first mask layer having a first etch rate from exposure to ions incident on the first mask layer; providing a second mask layer having a second etch rate that is lower than the first etch rate from exposure to ions incident on the second mask layer; providing apertures through portions of the first and second mask layers to provide a patterned mask structure; putting the patterned mask structure on a workpiece comprising one or more film layers on a subtrate; and the first mask layer is closer to both the workpiece and the subtrate than the second mask layer, the patterned mask structure is on a layer of a workpiece, portions of the workpiece layer are under the apertures, and implanting ions in the portions of the workplace layers alters a property of the portions of the workpiece layer.