High frequency PCB design layout points to note: (1) With high integration and high density PCB design and wiring, (2) the lead bending between the pins of the high-speed circuit device should be less, (3) the lead between the pins of the high-frequency c
PCBA processing using expired PCB board three hazards: 1, PCBA processing using expired PCB may cause oxidation of PCB surface welding pad, 2, PCBA processing using expired PCB may cause moisture absorption and burst board, 3, PCBA processing using expire
Types of SMT SMT process materials: (1) solder and solder paste, (2) flux, (3) binder, (4) cleaning agent
The importance of PCBA processing plant to select the SMT placing machine is as follows: first, the type of components that can be affixed, second, the adjustment of the placing machine
SMT patch proofing processing and installation IC notes: 1, the welding time is short, not more than 3s, 2, the use of electric iron constant temperature 230 degrees, 3, proofing table do anti-static treatment. 4, choose some pointed and narrow iron head,
SMT surface mount technology has the following 5 steps: 1. PCB production - this is the actual production stage of PCB with solder points; 2. Deposit solder on the pad to fix the assembly to the plate; 3. With the help of the machine, the components are p
The reasons for the formation of tin beads in PCBA processing: 1. When the PCB board leaves the liquid solder, it is very easy to form tin beads, 2. The second reason for the formation of tin beads is the release of volatile substances in PCB board and so
Solder paste, solder paste, and solder paste are two kinds of products - solder paste and solder paste, solder paste and solder paste can be distinguished from the appearance of color, solder paste is yellow, solder paste will hair gray or black, this is
Shielding method in high frequency PCB design: the twisted pair in data twisted pair can resist external interference and cross-talk between pairs through its own twisting at low frequency, but at high frequency, only twisting and merging can not achieve
Circuit board components testing skills: 1. Measure the polarity of each foot of the rectifier bridge, 2. Judge the quality of crystal vibration, 3. Unidirectional thyristor detection, 4. Polarity recognition of bidirectional thyristors, 5. Check the qual
What aspects of PCB have an impact on PCBA: one, PCB board surface dirty, two, white slag, three, PCB deformation
PCB board temperature resistance test method: In order to ensure the quality of PCB board, it is necessary to carry out temperature resistance test, usually the highest temperature resistance of PCB board is 300 degrees, 5-10 seconds; Over lead-free wave
