SEM全称是什么?

SEM全称是什么？

SEM英文全拼：Search Engine Marketing，中文意思是搜索引擎营销。SEM是一种新的网络营销形式。SEM所做的就是全面而有效的利用搜索引擎来进行网络营销和推广。SEM追求最高的性价比，以最小的投入，获最大的来自搜索引擎的访问量，并产生商业价值。所以SEM包含了从搜索引擎进入的流量到最后达成销售的所有的工作。

Conductive Coating

是涂导电涂料那一步吧,下面是英文的Wiki百科.找的好苦啊.

Conductive Coating – An ultrathin coating of electrically-conducting material,deposited either by high vacuum evaporation or by low vacuum sputter coating of the sample.This is done to prevent the accumulation of static electric fields at the specimen due to the electron irradiation required during imaging.Such coatings include gold,gold/palladium,platinum,tungsten,graphite etc.and are especially important for the study of specimens with the scanning electron microscope.Another reason for coating,even when there is more than enough conductivity,is to improve contrast,a situation more common with the operation of a FESEM (field emission SEM).When an osmium coater is used,a layer far thinner than would be possible with any of the previously mentioned sputtered coatings is possible.[12]

5分钟。sem扫描电镜喷金是一种动态观察和分析材料微观变形形貌及断裂机制的手段，喷金处理需要5分钟，在材料科学研究中发挥了重要作用。为了获得更好的扫描电镜图像，扫描电镜有必要结合喷金仪（离子溅射仪）使用。

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