The medical field is one of the most sensitive applications requiring PCBS because it requires precision, reliability, and high quality components. For this reason, medical PCBS are specifically designed to suit specific environments, laboratories, and te
PCBA three anti paint coating methods: 1, impregnation, 2, spraying, 3, brush coating, 4, selective coating
the production of controllable impedance boards is becoming more and more important.
To evaluate the heat dissipation capacity of PCB, it is necessary to calculate the equivalent thermal conductivity (9EQ) of the insulating substrate for PCB, which is composed of various materials with different thermal conductivity.
In the design of the power resistance as far as possible to select some large components, and adjust the layout of the printed circuit board so that it has enough space for heat dissipation.
The lines form "copper roots" on both sides after etching, and the copper roots narrow the line spacing, resulting in printed circuit boards that do not meet the requirements of Party A, and may even be rejected.
he system speed can be greatly reduced because of the increase of delay time caused by the delay of 2ns per 30cm line length of the common interconnect on the baseboard. Image shift register synchronization counter.
The common multilayer board is generally 4 or 6 layers, complexMultilayer board can reach dozens of layers.
Advantages: high assembly density, small volume, light weight because of high assembly density, the connection between components (including components) is reduced, so the reliability is improved; The number of wiring layers can be increased, thus increas
the temperature reproducibility can be obtained through multiple tests, so as to systematically evaluate the performance of the press.
PCB board test system will have a new design idea, the use of automatic test system based on USB bus and virtual instrument design idea, give full play to the role of the computer
Halogen-free PCB printed circuit boards have low water absorption and meet the requirements of environmental protection, in other performance can also meet the quality requirements of PCB board.