Hd understand the basic architecture of tight HDI board PCB
With the introduction of surface mount technology, automatic detection technology of circuit board is applied, and the packaging density of circuit board increases rapidly.
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Detailed analysis of the basic knowledge of circuit board
The circuit board makes the circuit miniaturized and intuitive, which plays an important role in the mass production of fixed circuit and the optimization of electrical appliance layout.
The cause of electromagnetic interference in PCB and the technique of eliminating interference
In PCB, EMI can be produced for many reasons, such as: RF current, common mode level, ground loop, impedance mismatch, magnetic flux
Why is the common PCB board thickness 1.6mm
as PCB substrate epoxy resin (see the column of PCB substrate resin chapter), PCB substrate reinforcement materials, copper foil and other manufacturing technologies have not realized commercial production.
PCB board, the rules are very particular
Otherwise, you may be forced to make modifications and redesign your PCB stack structure.
Effect of different thickness and roughness of copper conductor on dielectric constant
Any circuit board material used in millimeter-wave circuits should have a low TCDk value to minimize the impact of Dk changes on circuit performance (such as phase shift).
The effect of dielectric on Dk
these changes in Dk will introduce certain impedance errors when designing millimeter-wave transmission lines using computer simulation software.
A set of hardware devices designed and manufactured
to produce a conductive channel on the circuit board that allows the later process to complete the connection between the upper/lower or intermediate circuit layers
Domestic EDA needs to do is to break each other
Connectivity through holes For multi-layer circuit boards to conduct connectivity tests, the purpose is to find out whether the PCB graphics have connectivity.
Choice of inductor or transformer
Some do not notice this phenomenon, directly adjust the sense resistance or working frequency to reach the required current, which may seriously affect the service life of LED.
Microelectronic devices
These products and solutions can be applied to mobile devices such as smartphones, tablets and wearables, as well as high-speed data communication devices.
Opportunities for domestic PCB manufacturers to engage with the process
The layout of the basic structure such as PAD, design rule check (DRC), parameter extraction (EXT) and layout circuit control (LVS) associated with the design tool are the key to the successful production of the designed chip in the wafer factory. This is
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