The phase separation of the polyimide-metal hybrids and the distribution of the hybrid and the size of the particles vary with different hybrid systems and different hybrid processes. As far as the distribution of the hybrid is concerned, there are two types of distribution: one is a homogeneous distribution, and the hybrid is isotropic. The second is heterogeneous distribution, the hybrid is anisotropic, including a variety of multi-layer structure. The former is often microphase separated, the latter often lead to the formation of large particles. Metals, metal oxides, and the like, are inherently incompatible with polyimides, and phase separation occurs. Migration and aggregation lead to multi-layer distribution and large particle generation. During the heat treatment, the temperature gradient in the hybrid and the evaporation of the solvent tend to migrate. But migration is also constrained by other factors. Such as the stability of the metal dopant and the degree of interaction with the polymer. If the stability of the metal dopant is poor, strong interaction with the polyamic acid and other. The metal dopant can not be moved to decompose into metal or metal oxide, and in the form of microphase separation by polyimide substrate fixation.