Signal PCB board
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.
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.
Purpose and function: to remove the oxide on the copper surface of the line, the ink residue film remaining glue, to ensure a binding force between copper and graphic plating copper or nickel
Organic pollution of gold cylinder using carbon core continuous filtration, and add appropriate amount of gold-plated additives.
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 most critical problem is not to cross the divide gap wiring, once across the divide gap wiring, electromagnetic radiation and signal crosstalk will increase sharply. The most common problem in PCB design is EMI problem caused by signal lines crossing
The gold plating of the plug is hard gold, wear-resistant, pluggable hundreds of times, requiring that the gold layer has a certain hardness, and the gold liquid in the gold groove contains trace cobalt (nickel, antimony) elements.
Automated testing is essential to validate the manufacture of printed circuit boards. The bare board test will check that the wood-based board has good connectivity, while the ICT and fly pin tests will verify the board assembly and welded connections.
Now there are many ways to layer, there are potions corrosion, tool stripping, but it is easy to put the layer over, lost data. Experience tells us that sandpaper is the most accurate.
the general double panel copying board is much simpler than the multi-layer copying board, multi-layer copying board is prone to inaccurate situation, So the multilayer board copy board to be particularly careful and careful (which internal through holes
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.
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.
an all-digital system may not have a separate analog power plane, and adding a new power plane can become prohibitively expensive unless the designer creates a partitioned island or separate plane on top of the existing layer.