Circuit board machining inspection standard
I played once in three days and 4 times in half a month. Later, I could not help feeling "this is what the development board should have looked like".
I played once in three days and 4 times in half a month. Later, I could not help feeling "this is what the development board should have looked like".
The PCB layout and wiring can be adjusted to prevent ESD Static electricity from the human body, the environment and even inside electronic equipment can cause various damage to the precision semiconductor chip.
The quality of the coating is directly affected by the additive impurities and the foreign impurities brought by the electroplating process.
The large current of the driver chip comes from the consumption of the driving power MOS tube. The simple calculation formula is I=cvf.
The absence of domestic manufacturers in PDK has affected the development of domestic EDA industry to some extent. Relevant people told the semiconductor industry observer reporter.
high temperature conditions of welding, the iron head is often treated by electroplating. Some iron heads are also made of alloy materials that are not easy to oxidize. The new iron head should be tinned before formal welding.
The use of strong alkali can make the dry film dissolution or peeling properties of the unwanted dry film from the surface peel or dissolve corrosion plate: the use of bivalence copper ammonium and ion oxidation to the unwanted copper from the plate corro
In the design process, most of the design can be modified to add or subtract components through prediction.
At the same time, the direction of the power cord and ground wire is consistent with the direction of data transmission, which helps to enhance the anti-noise capability.
In the era of industrialization surplus, circuit board manufacturers in particular, choose a suitable circuit board manufacturers is very important! In the industry.
Usually, the power consumption and heat dissipation of high-speed circuits are also large, so sufficient attention should be paid to the high-speed PCB.
I replaced the suspicious chip through a wave of detection and investigation. It was determined that a component on the side of the south bridge chip was short-circuited.