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求助,DIBL如何测试?

andyseanxiao 发表于: 2010-2-02 16:50 来源: 半导体技术天地

最近在看一个关于wat测试的资料。里面降到了DIBL的测试。
现摘录内容如下:
Measurement method
a. VD=VDD, VS=VB=0V, VG=0V TO 0.8*VDD
      measure VTSAT=VG at ID=0.1UA*W/L
b.DIBL=|VTSAT-VT_linear|/(VDD-0.05(0.1))*1000

接着我翻看了一下前面的VT_linear的测试,发现测试方法和(a)中讲述的VTSAT的测试方法一样。有一点除外,就是VT_linear测试中的VD=0.05V(0.1V),而VTSAT测试中的VD=VDD,没有表明VDD的具体数值。
因此,我猜测,这个DIBL测试的过程应该是改变VD值,通过a可以得到对应的VTSAT,然后通过b可以得到对应的DIBL值。然后得到DIBL对应于VD的一条曲线。

请各位帮我看看,看我的理解是不是正确的。谢谢了。

最新回复

ngubyd at 2010-2-02 17:07:06
我也想知道~~~~~
blueleaf at 2010-2-02 19:32:03
正确!!!
zhangxiaow at 2010-2-02 21:19:34
你的理解基本到位,VT_linear测试中的VD=0.05V(0.1V),它是用来测量阈值电压的一个方法。
ywliaob at 2010-2-03 18:20:07
DIBL= Vg1 (@Id=1uA, Vd=0.1V) - Vg2 (@Id=1uA, Vd=Vdd)
mubaiw at 2010-2-03 19:20:32
Firstly of all, you should understand what is DIBL.
Then you will know how to measure DIBL.
vvangliang at 2010-2-04 21:54:04
噢,今天看了感觉又了解更深一层次了,谢谢楼主啊!
tony_jin at 2010-2-27 21:37:02
share a document to your about DIBL

DIBL coefficient in short-channel NMOS transistors.pdf
(2010-02-27 21:37:02, Size: 250 KB, Downloads: 20)

supercase at 2010-9-26 13:55:19
DIBL (Drain Induced Barrier Lowering)
– VTLIN
        VB=VS=0, VD=0.05, VG = 0 to 0.8*VDDN
        Measure VG@ID = 0.1μA*(W/L)
– VTSAT
        VB=VS=0, VD=1.1*VDDN, VG = 0 to 0.8*VDDN
        Measure VG@ID = 0.1μA*(W/L)

DIBL= (Vtlin-Vtsat) / (1.1Vddn-0.05)

Threshold variation is caused by the increased current with increased drain voltage, as the applied drain voltage controls the inversion layer charge at the drain, thereby competing with the gate voltage. In the weak inversion regime, there is a potential barrier between the source and the channel region. The height of this barrier is a result of the balance between drift and diffusion current between these two regions. If a high drain voltage is applied, the barrier height can decrease, leading to an increase drain current. Thus the drain current is controlled not only by gate voltage, but also by the drain voltage

大家一起学习
HERO007 at 2010-9-27 21:55:21
楼主只要理解DIBL的原理,测试就水到渠成了~~~
ruvyi at 2010-9-27 22:01:24

QUOTE:

原帖由 HERO007 于 2010-9-27 21:55 发表
楼主只要理解DIBL的原理,测试就水到渠成了~~~
有点吹了吧。。。

不是知道原理就会做的,就好象知道E=mC2,你给我造个原子弹。
triplewater at 2010-9-28 19:51:55
VDD就是工作电压,不同电路有不同的电压要求的。
badmintonor at 2010-9-28 21:34:00
这个很明显啊,看名字就知道了
具体如何表征就如LZ 所引用的