Patent ID: 9152038
Filing Date: 2015-10-06
Classification: B23C,B23P,C25D,G03F,H01Q,H04M,H05K,Y10T

Abstract:
1. A photomask suitable for forming a photoresist pattern on an aluminum substrate, the photoresist pattern associated with a surface feature created while anodizing the aluminum substrate, the photomask comprising: an exterior corner including a first pre-distortion feature, the first pre-distortion feature configured to reduce an amount of corner erosion caused by a subsequent blasting operation at a corresponding exterior corner of the photoresist pattern, wherein the first pre-distortion feature is used to create a first feature at the exterior corner of the photoresist pattern that compensates for erosion of the exterior corner of the photoresist pattern from a blasting media; and an interior corner including a second pre-distortion feature, the second pre-distortion feature configured to reduce an amount of corner erosion caused by a subsequent blasting operation at a corresponding interior corner of the photoresist pattern, wherein the second pre-distortion feature is used to create a second feature at the interior corner of the photoresist pattern that compensates for erosion of the interior corner of the photoresist pattern from the blasting media.