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在工艺中,我们有时发现Ⅰ_C—Ⅴ_(CE)曲线上翘,大家通称“扫帚形漏电”,见图1。对于形成这种特性曲线的原因,见过几种说法,多认为是杂质沾污引起的大漏电和缺陷引起的“管道”击穿形成的。最近我们观察到有两种情况可以产生这种后果。现在我们把观察到的情况和大家讨论一下,以便找出问题的原因,并反馈到工艺中去,解决这些问题。从特性曲线上看,发现与正常曲线相比,最大的不同是,当基流I_b=0时,I_c已有较大输出,在JT_1图示仪上仔细观察,发现在电压很低的时候(小于1伏)曲线已经起来
In the process, we sometimes find Ⅰ_C-Ⅴ_ (CE) curve up, we are commonly known as “broom-shaped leakage,” Figure 1. For the formation of this characteristic curve of the reasons, see several statements, and more that impurities caused by contamination and defects caused by the “pipeline” breakdown formed. Recently, we have observed that there are two situations that can have this effect. Now we will discuss the situation and discuss with everyone in order to find out the reasons for the problem, and feedback to the process to solve these problems. From the characteristic curve point of view, we found that the biggest difference compared with the normal curve is that I_c already has a larger output when the base flow I_b = 0. After careful observation on the JT_1 graphometer, it is found that when the voltage is very low Less than 1 volt) curve has been up