The invention relates to the technical field of
coating materials, in particular to a temporary protection
coating for UV illumination demolding and application of the temporary protection
coating. When holes are directly drilled in the surface of a multi-layer PCB,
copper cuttings are easily generated, and the drilling precision is influenced. In order to solve the problems, the invention provides a temporary protection coating material for UV illumination demolding, wherein a free
photoinitiator in the coating material absorbs energy under a specific emission
wavelength to initiate photocuring of the coating
material system, so that a temporary protection coating is formed on the surface of a PCB multilayer circuit board, wherein the specific emission
wavelength perfectly avoids the absorption
wavelength range of the
photoinitiator 2959, after drilling, the PCB multilayer circuit board is placed under a high-pressure mercury lamp for high-energy
irradiation, the
photoinitiator 2959 fragment of the modified
polyurethane structure in the temporary protection coating can absorb a large amount of energy to break, the temporary protection coating is fragmented, and finally, strong shrinkage occurs under the action of
high energy, so that automatic stripping from the surface of the PCB multilayer circuit can be realized.