| 实际应用中的旧芯片 |
| 芯片的使用会影响使用吗？ |
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很多芯片采购用户都感到困惑，旧的芯片可以使用，会影响产品吗？以及芯片的保质期有多长。在不缺芯片的情况下，我们应该选择什么来买新的一年的芯片呢？
实际应用中的旧芯片
In theory, the life cycle of chips ranges from 10 to 20 years, but in our actual supply experience, we have encountered chips 40 or even 50 years ago, and there are no problem in their use. And some chip life cycle is only a short five years ended, how is such a big gap produced? In fact, it is need to judge according to the actual situation. The life cycle of a chip is determined by many factors, including the use of the chip and the life span of the chip, and the storage mode directly affects its performance.
So the chip and cell of this semiconductor device last very long. Someone, back in 1998, Testing and testing of a batch of American space class transistor JANS2N2219AL manufactured in 1980, These components have been in storage for 17 years, Does the 17-year quiet period affect it anything badly? The test results show that 10 tubes were pumped for the full power life test for 6000h, Little changes in electrical parameters after the test, So long-term storage has not affect its reliability, Then the time came to 2006, By this time, the components were already 26 years old, A retest of the electrical parameters was performed, Both hFE and 1998 parameters coincide, There was no significant changes, Of course, this is a space-level element.
In 1998, someone specifically for a batch of American space class transistors JANS2N2219AL produced in 1980, and said that this batch of components has been stored for 17 years, whether 17 years of quiet period has any bad impact on it.
The test results show that: any smoke 10 tubes for 6000h full power life test, test electric parameters change, visible long-term storage did not affect the reliability of it, so the time came to 2006, then this batch of components is 26 years old, the electrical parameters, hFE and 1998 parameters, no obvious change, of course, this is the level of aerospace components.
芯片的使用会影响使用吗？
既然组件的寿命这么长，是不是老了？答案肯定不是。
After many years of storage of the external lead of the device, if improperly stored, some will cause corrosion and affect the weldability. In long-term exposure to components in the air, water vapor will enter the shell, electrochemical corrosion, make the lead bonding failure or electric parameter degradation so old components to use, precondition is to keep properly, because the chip is easy to receive static and moisture, so conform to the specification protection measures is very necessary, protect properly, the small components seemingly thin, but the function can be very strong and long life. With the progress of process technology, the activation energy of semiconductor devices increases by about 3% per year.
In fact, many components of the damage are caused by external conditions, not the life of the component itself is short, as long as the right way to save, many older components still have high use value. Of course, if we have the conditions, try to choose the components of the new year to use.
