CVD diamond thick film is a pure diamond material with full polycrystallinity synthesized by chethecal va-por deposition method.It can be in a thick sheet form of freestanding. 金剛石厚膜片是采用化學(xué)氣相沉積的方法制備出來(lái)的一種金晶質(zhì)多晶純金剛石材料,其物理性能和天然金剛石非常接近,而化學(xué)性質(zhì)則完全相同。