Some of the phase change processes are conflicted depending on a single channel size.For example,small pores are helpful to generate large capillary pressure for liquid suction,but create large viscous force for fluid transportation.Here the bionic mastoid process structure was formed by sintering hybrid micron or nano size particles and Na2CO3 salt on the vapor chamber substrate.The salt is decomposed to form 10-100 m pores for fluid transporation.The sintered particles form small pores(nm-m scale)depending on particle sizes used to create ultra large capillary force.The mastoid process is just like that grows on plant leaf.The sintering structure is ultra-hydrophilic.The tips of mastoid process directly contacted with the condenser surface.The evaporator substrate,mastoid process and the vacuum space inside the vapor chamber generate a multiscalechannel-network(MCN)to modulate the gas-liquid phase distribution.Because liquid on the condenser surface is continuously returned to the evaporator surface,the MCN ensures ultra-thin liquid film on the condenser surface and prevents dry-out for the evaporator.We demonstrated the MCN based vapor chambers operating at any inclination angles,in dependent of gravity.For the evaporator,the liquid film evaporation heat transfer mechanism dominates over a large heat flux range,while the nucleation boiling mechanism occurs at very small heat fluxes.The heat transfer performance is even better for the anti-gravity operation,due to larger gas-liquid interface area within the mastoid process for the evaporation.Besides,the sintering structure was treated by the thermal oxidization method to form nano-grasses on isolated particles,further improves the vapor chamber performance.This study constructs a new way to design heat pipes for the anti-gravity operation.