Patent ID: 9064984
Filing Date: 2015-06-23
Classification: H01L

Abstract:
1. A method of fabricating a semiconductor device having a die including a substrate with a first side and a second side, integrated circuitry, and bond-pads located at the first side that are electrically coupled to the integrated circuitry, the method comprising: forming a conductive structure having interconnects and traces, wherein the interconnects are electrically coupled to the bond-pads and extend to the second side of the substrate, and wherein the traces extend from the interconnects over the second side of the substrate; providing a preformed laminated bi-layer radiation blocking structure that is formed apart from the substrate, the laminated bi-layer radiation blocking structure having a first layer of an at least substantially non-photoreactive material and a second layer of a photoreactive material; applying the preformed laminated bi-layer radiation blocking structure to the second side of the substrate so that the laminated bi-layer radiation blocking structure conforms to the topography of the traces and the interconnects; photo-patterning apertures in the second layer of the laminated bi-layer radiation blocking structure that are aligned with ball-pad portions of the traces; and forming openings in the first layer of the laminated bi-layer radiation blocking structure without photo-patterning the first layer.