The invention discloses an anti-
diffusion agent for a PCB glass substrate and a preparation method and application thereof, and relates to the technical field of
printed circuit board manufacturing. The anti-
diffusion agent is prepared from the following components in
mass concentration: 0.5 to 2.5 percent of a surface reinforcing agent, 0.5 to 2.5 percent of a bonding agent, 1.0 to 3.0 percent of a
wetting agent, 0.5 to 2.5 percent of a stabilizing agent, 0.2 to 1.5 percent of a cosolvent and the balance of water, the surface
enhancer is a
sulfonate compound containing a
fluorine functional group and a
silicon functional group, the bonding agent is an
azole compound containing a
sulfur functional group, the
wetting agent is a
benzyl alcohol compound containing a hydroxyl functional group, the stabilizer is a
piperidine derivative, and the cosolvent is an
ether solvent. According to the anti-
diffusion agent for the PCB glass substrate, the
surface tension of the glass substrate can be reduced, the
interface bonding force between the substrate and ink can be enhanced, the diffusion phenomenon of jet
printing ink on the surface of the substrate can be fundamentally inhibited, and the product yield of a solder
resist process can be remarkably improved.