金刚石晶形显露的化学控制

Chemcal Control of Facet Appearance of Diamond

采用热丝化学气相沉积法（HPCV），研究了N2、O2对金刚石晶形显露的影响。发现微量的氮气的加入（[N2]／[CH4]＜1％）有利于金刚石（100）晶面的显露，且不会降低金刚石晶形的完整性；微量氧的加入有利于金刚石（111）面显露．采用氧辅助控制金刚石膜（111）织构生长，可以使X射线（111）峰摇摆曲线的半宽降到6．2°．氮或氧的加入扩大了织构生长金刚石（100）或（111）膜的基片温度范围．

The influence of N2 and O2 on the facet appearance of diamond has been studiedwith hot filament chemical vapor deposition (HFCVD). It was f0und that adding minor amountof N2(V(N2)/V(CH4)<1%) and O2 (V(O2)/V(CH4)20%) to the source gas is favorable for thefacet appearance of diamond (100) and (111) respectively. By the chemical control of texturedgrowtll of diamond (111) with adding O2, the FWHM of the rocking curve of X-ray (111) peakcan be reduced to 6.2° The temperature window of substrate for the textured growth of diamond(100) or (111) was enlarged with the addition of N2 or O2.