Patent ID: 8940585
Filing Date: 2015-01-27
Classification: H01L

Abstract:
1. A method comprising: forming a three-dimensional pattern on a top surface of a metal substrate, wherein the three-dimensional pattern on the top surface of the metal substrate defines a first level and a second level of the top surface of the metal substrate, wherein the first level of the top surface of the metal substrate is above the second level of the top surface of the metal substrate, wherein the top surface of the metal substrate is opposite to a bottom surface of the metal substrate; depositing dielectric material over the top surface of the metal substrate, wherein the dielectric material has (i) a top surface and (ii) a bottom surface that is opposite to the top surface, and wherein the bottom surface of the dielectric material is in contact with the top surface of the metal substrate subsequent to the dielectric material being deposited over the top surface of the metal substrate; subsequent to depositing the dielectric material over the top surface of the metal substrate, selectively removing the dielectric material from the top surface of the metal substrate, wherein subsequent to selectively removing the dielectric material, (i) a first portion of the first level of the top surface of the metal substrate is exposed through the dielectric material and (ii) the top surface of the dielectric material is substantially flush with the first level of the top surface of the metal substrate; and removing a portion of the bottom surface of the metal substrate such that a first section of the bottom surface of the dielectric material is exposed through the bottom surface of the metal surface.