Ordinary Tg sheet is above 130 degrees, High-Tg is generally above 170 degrees, and medium Tg is above 150 degrees. The Tg of the substrate has been improved, covering heat resistance, moisture resistance, chemical resistance, stability and so on.
As long as the circuit board has detected the problem, then maintenance is easy. The following is a summary of the circuit board maintenance basic formula, convenient and practical.
Before the advent of the printed circuit board, the interconnection of electronic components relied on wires directly connected to form a complete circuit. Now, printed circuit boards in the electronics industry has become the dominant position.
In electronic assembly, printed circuit board is a key component. It is equipped with other electronic parts and connected to the circuit to provide a stable circuit working environment.
bottom solder layer top solder layer drill guide, multilayer mechanical layer is to define the appearance of the entire PCB board, in fact, when we say the mechanical layer is referring to the overall structure of the PCB board.
A protective coating is a polymer film applied to the PCB surface to protect the PCB board and its components from corrosion and environmental contamination.
When adopting this method, it is necessary to ensure that the width of the bridge between the two ground is equal to the width of the IC, and that no signal line can cross the division gap.
Modern wireless applications require sturdy antennas, which often means a long printed circuit board to integrate and support these applications. Antenna designs can make or break your application, but relying on long PCBS can help you get the job done ri
the dielectric constant is small, can be used in high frequency. If applied to the electronic communication industry, it can greatly reduce the signal loss rate. The price of ordinary PCB board on the market will vary according to different materials.
The procurement of certain PCB boards is controlled only by the specifications embedded in the Gerber packet. PCB boards can be built from these packets, regardless of mechanical tolerances.
Chip-on-chip (WCSP) or core-sized ball grid arrays (DSBGA) use fine-pitch wire bonding and flip-chip interconnection, and are available in SiP, modular, stacked and recessed core-based formats.
If the transmission line is isotropic, there will always be a current as long as the signal is transmitted.