In order to evaluate the insulation of two-phase immersion cooling in the HV power electronic package. the insulation degradation of the dielectric interface induced by bubbles is investigated. In this paper. a test strategy with 50 Hz unipolar DC and AC combined voltage for partial discharge (PD) at boiling interface of AIN ceramic is proposed. https://www.itsmajorlook.com/top-deal-Dallas-Cowboys-logo-Fan-Decals-3-75-x-5-p32366-top-mega/