Patent ID: 8327540
Filing Date: 2012-12-11
Classification: H01L,Y10T

Abstract:
1. A method for producing a plate having first and second grooves comprising different widths and different depths, said method comprising steps of: creating, on a metal plate, a patterned first photoresist having a shape of perpendicularly intersecting straight lines; electroplating a first filling layer of metal on the plate between the lines of the first photoresist; chemical mechanical polishing the first filling layer of metal to form a flat surface; depositing on the flat surface a patterned second photoresist, having first and second structure parts comprising lines of different thicknesses, wherein at least part of the second photoresist is located upon the first photoresist; electroplating a second filling layer of metal between the lines of the second photoresist; chemical mechanical polishing the second filling layer of metal to create a flat surface; and removing the first and second photoresist to expose the first and second grooves between the metal with different depths.