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4#
发表于 2006-8-23 03:42
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原帖由 vorlesung 于 2006-8-17 22:45 发表
SMD封装的电阻电容有什么优缺点？比普通电阻贵多少？
能不能具体介绍下smd到底是什么含意。
多谢了yes.gif rose.gif
SMA=Surface-Mount Technology，就是我们一般说的贴片电阻/电容/集成电路之类的东东......
http://en.wikipedia.org/wiki/Surface-mount_technology
优点：
The main advantages of SMT over the older through-hole technique are:
- smaller, lighter components
- fewer holes need to be drilled through abrasive boards
- simpler automated assembly
- small errors in component placement are corrected automatically (the surface tension of the molten solder pulls the component into alignment with the solder pads)
- components can be fitted to both sides of the circuit board
- lower lead resistance and inductance (leading to better performance for high frequency parts)
- better mechanical performance under shake and vibration conditions.
缺点么......太明显了：您手焊个贴片IC以后就晓得鸟......
价钱么记不清楚鸟......很久没逛电子市场了...... |
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