INSTABILITY OF A GEXSI1-XO2 FILM ON A GEXSI1-X LAYER

被引：17

作者：

LIU, WS ^{[1
]}

CHEN, JS ^{[1
]}

NICOLET, MA ^{[1
]}

ARBETENGELS, V ^{[1
]}

WANG, KL ^{[1
]}

机构：

[1] UNIV CALIF LOS ANGELES,LOS ANGELES,CA 90024

来源：

JOURNAL OF APPLIED PHYSICS | 1992年 / 72卷 / 09期

关键词：

D O I：

10.1063/1.352211

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The stability of an amorphous GexSi1-xO2 in contact with an epitaxial (100)GexSi1-x layer obtained by partially oxidizing an epitaxial GexSi1-x layer on a (100)Si substrate in a wet ambient at 700-degrees-C is investigated for x = 0.28 and 0.36 upon annealing in vacuum at 900-degrees-C for 3 h, aging in air at room temperature for 5 months, and immersion in water. After annealing at 900-degrees-C, the oxide remains amorphous and the amount of GeO2 in the oxide stays constant, but some small crystalline precipitates with a lattice constant similar to that of the underlying GeSi layer emerge in the oxide very near the interface for both x. Similar precipitates are also observed after aging for both x. The appearance of these precipitates can be explained by the thermodynamic instability of GexSi1-xO2 in contact with GexSi1-x. In water at RT, 90% of GeO2 in the oxide is dissolved for x = 0.36, while the oxide remains conserved for x = 0.28.

引用

页码：4444 / 4446

页数：3

共 17 条

[1] TETRAGONAL GERMANIUM DIOXIDE LAYERS ON GERMANIUM [J].