Patent ID: 9281241
Filing Date: 2016-03-08
CPC Classification: H01L

Claim Text:
1. A method of processing a microelectronic workpiece including a semiconductor substrate having a plurality of microelectronic dies, the individual dies including integrated circuitry and a terminal electrically coupled to the integrated circuitry, the method comprising: forming a first opening in the substrate from a back side of the substrate toward a front side of the substrate and in alignment with the terminal, the first opening having a generally annular cross-sectional profile and separating an island of substrate material from the substrate; depositing an insulating material into at least a portion of the first opening, wherein depositing an insulating material comprises at least generally filling the first opening with the insulating material and covering the entire back side of the substrate with the insulating material; removing at least approximately all the insulating material from the back side of the substrate outside the first opening; applying a photosensitive polymer material directly onto the back side of the substrate; forming a second opening in the photosensitive polymer material, wherein the second opening has a diameter less than a diameter of the first opening, and wherein a wall of the second opening is aligned with at least a portion of the insulating material within the first opening; and removing the island of substrate material after depositing the insulating material and forming a third opening aligned with at least a portion of the terminal, wherein the third opening does not extend completely through the terminal.