PCB design layer number to consider the following problems: 1, use,2, required signal type,3, through hole type,4, required signal layer density and number,5, required plane number,6, manufacturing cost,7, delivery time,
Circuit board PCBA processing process can be roughly divided into: empty plate loading - printed solder paste - mounting devices - reflow welding -AOI testing - receiving plate - finished product inspection - parts after welding - circuit board open/short
Common bad reasons for PCBA welding resistance film processing :1. Welding pad and through hole connection. 2. Solder resistance design between pad and pad, solder resistance graphic specifications should conform to the design of welding end distribution
Common heat dissipation mode of circuit board: 1, high heating device plus radiator, heat conduction plate, 2, through the circuit board itself heat dissipation, 3, the use of reasonable design to achieve heat dissipation function, 4, for the use of free
In PCB processing and production, static electricity is not the hazard, the real danger lies in the accumulation of static electricity, and the resulting electrostatic discharge.
In the process of production, packaging and transportation, and the processing, debugging and testing of the integrated machine, it is inevitable to suffer from external or own friction and form a high surface potential.
Mixing process is in the PCB board A side has a number of IC components, and inserted with through hole components, on the other side of the PCB (B side) and there are many patch resistance capacitance electrical parts, sometimes IC, often called "mi...
The reasons for the need for post-welding processing are as follows: 1, the components are not resistant to high temperature, 2, the components are too high, 3, there are a small number of plug-ins in the side of the wave crest, 4, the components plug-in
In PCBA processing, there are several process points in the whole process of rework and reflow: 1. Repair reflow welding curve should be close to the original welding curve. 2. In the reflux process, the heating temperature and time of each area should be
What are SMT patch, PCB circuit board, PCBA processing and DIP plug-in respectively? First, SMT is one of the basic components of electronic components, which is called surface assembly technology; second, PCB is the most important component of electronic
5 PCBA processing automation production of PCB size, shape, transmission edge, positioning hole, positioning symbol requirements.
In the process of electronic machining, the smaller the Angle of the scraper affects the vertical force of the solder paste, the greater the vertical component of the force.
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