Uv-curable resin compositions suitable for redistribution layers
AssigneeDesigner Molecules, Inc.
InventorFarhad Mizori
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Abstract
Hydrophobic, tough, photoimageable, functionalized polyimide formulations have been discovered that can be UV cured and developed in cyclopentanone. The present invention formulations can be used as passivation and redistribution layers with patterning provided by photolithograph, for the redistribution of I/O pads on fan-out RDL applications. The curable polyimide formulations reduce stress on thin wafers, when compared to conventional polyimide formulations, and provide low modulus, hydrophobic solder mask. These materials can serve as protective layers in any applications in which a thin, flexible, and hydrophobic polymer is required, that also has high tensile strength and high elongation at break.
Claims67
A passivating formulation comprising at least one curable, functionalized polyimide wherein the at least one curable, functionalized polyimide is the product of a condensation reaction of a diamine with an anhydride.
Dependencies are inferred from the claim text.