What is the nature of reflow welding in PCB manufacturers?  

What is the nature of reflow welding in PCB manufacturers?   The essence of reflow welding is “heating”, the core of the process is to design the temperature curve and set the furnace temperature.   The temperature curve refers to the “temperature-time” curve developed by the technician based on the representative package and solder paste of …

What are the FPC soft board mounting processes in SMT production?

What are the FPC soft board mounting processes in SMT production? In the SMT production line, the process of mounting SMD on flexible printed circuit boards (FPC) requires the development of miniaturization of electronic products, and a considerable part of the surface mount of consumer products, due to the assembly space, their SMDs are all …

 What are the common types of PCB boards?

What are the common types of PCB boards? 1. Single panel The single panel is composed of “single-sided circuit + protective film”. The single-sided flexible board has better folding resistance. 2. Double panel The double panel is composed of “protective film + double-sided circuit + protective film”. The double-sided flexible board double-sided board substrate has …

What are the three defenses often mentioned in PCBA?

What are the three defenses often mentioned in PCBA? The essence of the “three preventions” in electronic processing is to coat a protective film on the protected surface. The protective effect is related to the coating method and coating process. Spraying basically belongs to the protection of the PCB surface, while dipping can protect the …

What are the wrinkles and improvement methods of PCB laminated copper foil?

What are the wrinkles and improvement methods of PCB laminated copper foil? During the PCB lamination process, the PP resin undergoes “glassy state-high elastic state-viscous fluid state-high elastic state-glass state” changes due to graphic design, flatness of the press steel plate, temperature unevenness, and board layout methods, etc. Due to the influence of factors, the …

 What are the technological processes of surface mount technology?

What are the technological processes of surface mount technology? PCB assembly (surface mount technology) is currently one of the most important technologies used in electronic products. Its appearance and application have promoted the development of the entire electronics industry, but the PCB assembly process is relatively complicated, and it is necessary to complete the electronic …

What are the components of PCB assembly

What are the components of PCB packaging

A complete PCB package is composed of many different elements, and different components require different elements. Generally speaking, the package components include: sink hole size, dimensioning, chamfer size, pad, solder mask, aperture, hot air pad, anti-pad, pin number (Pin Number), pin spacing, Pin span, silk screen line, assembly line, no-wiring area, no-hole area, tag characters, …

How to avoid solder paste defects in pcb manufacturing?

How to avoid solder paste defects in pcb manufacturing?

Seventy-five to eighty-five percent of defects in PCB manufacturing are caused by solder paste defects, so solder paste defects are very troublesome in the daily production detail control process. The management and control details should start from the initial BOM and Gerber data sorting, to component procurement channel management, solder paste storage and access control, …