1. Optimize material formula
Introduce corrosion-resistant groups: Introduce corrosion-resistant groups, such as fluorine atoms, into the molecular structure of organic polysilazane. Fluorine-containing groups can improve the chemical stability and hydrophobicity of the material, reduce the contact between corrosive substances and the surface of the material, and thus enhance the corrosion resistance.
Adjust the silicon-nitrogen bond structure: Improve the bond energy and stability of the silicon-nitrogen bond by changing the connection mode of the silicon-nitrogen bond and the surrounding chemical environment. For example, appropriately increasing the cross-linking density of the silicon-nitrogen bond can make the material form a denser network structure and hinder the penetration of corrosive substances.
2. Improve the preparation process
Precisely control the reaction conditions: During the synthesis of organic polysilazane, precisely control the reaction temperature, reaction time, reactant concentration and other parameters to ensure that the synthesized polymer has a uniform molecular structure and good performance. For example, a suitable reaction temperature can make the reaction more complete and reduce unreacted active groups, thereby improving the stability and corrosion resistance of the material.
Use advanced curing technology: select appropriate curing methods and curing agents, such as UV curing, thermal curing, etc., and optimize curing process parameters. For example, UV curing can cure quickly at a lower temperature, reduce the thermal impact on the chip, and the formed cured film has good corrosion resistance. In addition, adding an appropriate amount of curing agent can fully cross-link the organic polysilazane and improve the density and corrosion resistance of the material.
3. Surface treatment technology
Chemical plating or electroplating: Chemical plating or electroplating is performed on the surface of the chip package to coat a layer of metal or alloy with good corrosion resistance, such as nickel, chromium, etc. This metal coating can serve as a barrier layer to prevent corrosive substances from directly contacting the organic polysilazane, thereby improving its corrosion resistance.
Surface fluorination treatment: The surface of the organic polysilazane package is fluorinated to form a fluorine-containing surface layer. Fluorination treatment can improve the hydrophobicity and chemical stability of the material surface, reduce the adsorption and diffusion of corrosive substances on the material surface, and thus enhance corrosion resistance.