PCB copy board use: The purpose of PCB copy board is to learn the latest foreign electronic circuit design technology, and then absorb the excellent design scheme, and then used to develop and design more excellent products
Copper coating on PCB board, if the grounding problem is handled well, is certainly "more advantages than disadvantages", it can reduce the signal line backflow area, reduce the signal external electromagnetic interference
The way to distinguish the circuit board is good or bad: 1, light and color, 2, PCB board size and thickness of the standard rules, 3, PCB board weld appearance
The temperature of PCB board is related to the temperature of its raw materials, solder paste and surface parts. Usually, the highest temperature resistance of PCB board is 300 degrees, 5-10 seconds; Over lead-free wave soldering temperature is about 260,
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
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