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 PCBA circuit board test methods?

What are the PCBA circuit board test methods? PCBA circuit boards involve many circuits and components, and testing is extremely important, which is related to the straight-through rate and delivery quality of the product. The current mainstream 5 circuit board test methods are: 1. Manual visual test Manual visual testing is to confirm the placement …

What are the possible problems in PCBA substrate production?

What are the possible problems in PCBA substrate production? 1. Various soldering problems Blast holes in cold solder joints or tin solder joints Inspection Method: Before and after dipping soldering, the holes are frequently analyzed to find the places where the copper is stressed. In addition, the raw materials are inspected for incoming materials. possible …

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 …

How to effectively reduce the surface tension and viscosity in PCBA welding?

How to effectively reduce the surface tension and viscosity in PCBA welding? Whether it is reflow soldering, wave soldering or manual soldering, surface tension is an unfavorable factor for the formation of good solder joints. However, surface tension can be used in SMT chip reflow soldering-when the solder paste reaches its melting temperature, it is …

What should be paid attention to when welding double-sided circuit boards?

What should be paid attention to when welding double-sided circuit boards? Double-sided circuit board In order to ensure the reliable conductive effect of the double-sided circuit, the EDA365 Electronics Forum recommends that the connection holes on the double-sided board (that is, the through-hole part of the metallization process) should be soldered with wires or the …

Rigid-flexible multilayer PCB knowledge introduction

Rigid-flexible multilayer PCB knowledge introduction Rigid-flexible multi-layer PCB types are usually on one or two rigid PCBs, and include flexible PCBs that are necessary to form a whole. The flexible PCB layer is laminated in a rigid multi-layer PCB. This is to have special electrical requirements or to extend outside the rigid circuit to dynamize …