Robust ink formulations for durable markings on microelectronic packages and its extendibility as a barrier material for thermal and sealant materials

摘要

Methods for covalently and indelibly anchoring a polyacrylate polymer using a UV-induced polymerization process in the presence of a photoinitiator to an oxide surface are disclosed herein. The methods and compositions prepared by the methods can be used as indelible marking materials for use on microelectronic packages and as solder and sealant barriers to prevent overspreading of liquids on the oxide surfaces of microelectronic packages. The polyacrylate polymers are covalently linked to the oxide surface by use during the printing and UV-curing process of an adhesion promoter having as a first domain an oxide-reactive silyl group, bonded via a linker to an acrylate-reactive group.

主权项

1. A method of anchoring a polymer to an oxide surface, comprising:
applying to a defined portion of the surface an acrylate monomer, a photoinitiator, and an adhesion promoter, wherein the monomer, the photoinitiator, and the adhesion promoter form a mixture; wherein the adhesion promoter is of formula Si(X)n(R—Z)4-n, wherein each independently selected X is an oxide-reactive silicon-bonded group, each independently selected R is a spacer group, and each independently selected Z is an acrylate reactive group, and n=1, 2, or 3; and, illuminating the mixture disposed on the surface with ultraviolet light to induce acrylate polymerization, under conditions suitable for reaction of oxide-reactive group X with the oxide surface, to provide an acrylate polymer incorporating the adhesion promoter, covalently anchored to the oxide surface.