The Raman spectrum also shows that the amount of the component of amorphous carbon decreases as the growth time and discharge current density are increased. This is due to that the amorphous carbon is mainly contained at crystal boundary.

• Raman谱还表明金刚石膜内非晶碳成份随放电电流密度和生长时间增加而减少,并主要集中在晶粒界面之间。