83CNQ100ASL Manufacturers

Via hole is also called via hole. In order to meet customer requirements, the via holes must be plugged in the PCB process. Through practice, it has been found that in the process of plugging, if the traditional aluminum sheet plugging process is changed, and the white mesh is used to complete the board surface solder mask and plugging, the PCB production can be stable and the quality is reliable.

Why does the resistivity of semiconductor go down with temperature？Between the conductor and semiconductor resistivity difference is due to the different density of charge carriers.

The continuous growth of mobile phone production is driving the demand for HDI boards. China plays an important role in the world's mobile phone manufacturing industry. Since Motorola fully adopted HDI boards to manufacture mobile phones in 2002, more than 90% of mobile phone motherboards have adopted HDI boards. A research report released by market research company In-Stat in 2006 predicted that in the next five years, global mobile phone production will continue to grow at a rate of about 15%. By 2011, global mobile phone sales will reach 2 billion units.

Every time through AI flash, Guojin Securities said that semiconductor equipment parts play an important role in the industrial chain, with a large number, a wide variety and obvious market fragmentation characteristics

Now Si8000m and Si9000e also have a new option of XFE cross-modeling function, which Polar Instruments can provide. More than 98% of PCB manufacturers including Hongtai use Polar.​

We usually refer to metals with good conductivity such as gold, silver, copper, iron, tin and aluminum as conductors. At the same time, materials with poor conductivity, such as coal, artificial crystals, amber, ceramics, etc., are called insulators. Then, we can simply call the material between the conductor and the insulator semiconductor.