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    • 4. 发明授权
    • Liquid delivery MOCVD process for deposition of high frequency dielectric materials
    • 用于沉积高频电介质材料的液体输送MOCVD工艺
    • US06277436B1
    • 2001-08-21
    • US09216673
    • 1998-12-18
    • Gregory T. StaufJeffrey F. RoederThomas H. Baum
    • Gregory T. StaufJeffrey F. RoederThomas H. Baum
    • C23C1640
    • H01L28/55C23C16/40C23C16/4481H01L21/31691H01L27/10852
    • A liquid delivery MOCVD method for deposition of dielectric materials such as (Ba,Sr) titanates and (Zr,Sn) titanates, in which metal source compounds are dissolved or suspended in solvent and flash vaporized at temperatures of from about 100° C. to about 300° C. and carried via a carrier gas such as argon, nitrogen, helium, ammonia or the like, into a chemical vapor deposition reactor wherein the precursor vapor is mixed with an oxidizing co-reactant gas such as oxygen, ozone, N2O, etc., to deposit the high dielectric metal oxide film on the substrate at a temperature of from about 400° C. to about 1200° C. at a chemical vapor deposition chamber pressure of from about 0.1 torr to about 760 torr. Such process may for example be employed to form a (Ba,Sr) titanate dielectric material wherein at least 60 atomic % of the total metal content of the oxide is titanium. The high dielectric material of the invention may be used to form capacitive microelectronic device structures for applications such as dynamic random access memories and high frequency capacitors.
    • 用于沉积诸如(Ba,Sr)钛酸盐和(Zr,Sn)钛酸盐的电介质材料的液体输送MOCVD方法,其中金属源化合物溶解或悬浮在溶剂中并在约100℃的温度下闪蒸至 约300℃,并通过诸如氩气,氮气,氦气,氨等的载气进入化学气相沉积反应器,其中前体蒸气与氧气,臭氧,N 2 O等氧化性共反应气体混合 等等,以在约0.1托至约760托的化学气相沉积室压力下在约400℃至约1200℃的温度下将高介电金属氧化物膜沉积在基底上。 这种方法可以例如用于形成(Ba,Sr)钛酸盐电介质材料,其中氧化物的总金属含量的至少60原子%为钛。 本发明的高介电材料可用于形成用于例如动态随机存取存储器和高频电容器的应用的电容微电子器件结构。