In the new structure , a n + buffer layer is introduced into the bulk silicon substrate with a triple - diffusion process . . the new structure has two features : one is the feature of npt - igbt : the thin and lightly - doped p + layer and the high lifetimes of the carriers ; the other is the feature of pt - igbt : n7n + structure which can make the n " region very thin 新结构用三重扩散的方法在n ~ -单晶片上引入了n ~ +缓冲层，仍然保留了npt - igbt中薄而轻掺杂p层和高载流子寿命的本质优点，同时又具有pt - igbt中n ~ - ( n ~ + )双层复合的薄耐压层(即薄基区)的优点。
Meanwhile , australia ' s cabinet , hitherto resolute in its refusal to sell uranium to any country outside the nuclear non - proliferation treaty ( and only to a select few within it ) , has taken its cue from america and agreed in principle to sell uranium to india , even though india hasn ' t signed the npt , and won ' t 与此同时，尽管澳大利亚内阁至今仍拒绝向签署“核不扩散条约”国以外的国家出售铀(只向经过选择的几个签约国出售) ，但是，在得到美国的暗示后已经原则上同意向印度出售铀，尽管印度还没有也不会签署“核不扩散条约” 。
