PCBA

/Tag: PCBA

Inspection Method of PCB assembly Short Circuit

PCBA(Printed Circuit board Assembly) short circuit is a relatively common failure in PCB Assembly. once PCB assembly occured short circuit, which requires the professional electronic engineers to analyze the reason and deal with it to avoid irreparable losses.   Inspection Method of PCBA Short Circuit   If the board (PCB) will adopt manual soldering, developing a good habit is much vital. First, check the circuit board visually before soldering, and use a multimeter to check whether the key circuits (especially the power supply and ground) are short-circuited or not; Secondly, once soldered a chip to the board, using a multimeter to check whether the power supply and ground are short-circuited or not; In addition, do not throw the solder iron randomly when soldering. If you throw the solder onto the [...]

SMT assembly Processing / Patch Processing Basic Process Elements

The basic process elements of smt assembly processing / patch processing: Silk Screen (or Dispensing) --> Mounting --> (Curing) --> Reflow Soldering --> Cleaning --> Testing --> Rework Silk screen: Its function is to print solder paste or patch glue on the pad of PCB to prepare for soldering of components. The equipment used is a screen printing machine (screen printer), located at the forefront of the SMT production line. Dispensing: It is a glue that drops the glue to a fixed position on the PCB. Its main function is to fix the components to the PCB. The equipment used [...]

Electronics assembly manufacturing–Why Use Reflow Soldering?

Electronics assembly manufacturing Reflow soldering allows for the simultaneous processing of multiple connections. This prevents the disconnection of wires while you are soldering their neighboring wires. Reflow Soldering also improves the quality of resulting PCB Electronics assembly and offers many other benefits such as, Improved wettability of solder joints and surface mounted components. Improved solderability of a large variety of electronic components. Enhanced joint integrity for crucial electronic applications. Reduced board discoloration. Elimination of charred flux residues on heating elements and boards. Reduced formation of white haze from the oxidation of rosin or tin flux Optimized performance of low-residue and [...]

How should we inspect incoming materials in PCB assembly?

1.PCB size and appearance inspection PCB size inspection mainly includes the diameter of the processing hole, the spacing and its tolerance, and the small edge of the PCB; While PCB appearance inspection is about the solder mask and the pad alignment, for instance, whether the solder mask has impurities, peeling and wrinkling, the benchmark mark is qualified, the circuit conductor width (line width) and spacing meet the requirements or not.   2.PCB warpage and distortion detection The basic test principle: the PCB under test is exposed to the thermal environment and carry out the thermal stress test. In addition, a typical thermal stress test [...]

What is the reason for wave soldering Solder Touch

Wave soldering is to make the soldering surface of the board directly contact with high-temperature liquid tin for welding purposes. The high-temperature liquid tin maintains a slope, and the liquid tin forms a wave-like phenomenon by special means, so it is called "wave soldering". Wave soldering solder touch phenomenon 1. Due to the phenomenon that the component pin are too long when the board is over-wave soldering, the component trimming should be pre-processed: the extension length of the component pins is 1.5-2 mm, which does not exceed this height. There will be no phenomenon 2. Because the circuit board process [...]

2020-08-27T17:46:30+00:00Categories: Blog|Tags: , , |

Through hole PCB assembly in China: Which one do we recommend?

One of the first decisions in making a PCB is to choose the style and type of components we are going to use. This mostly depends on the electrical requirements of the PCB. However, once we meet the electrical requirements, there are a variety of available footprints and configurations to choose from. The type of components we choose will affect the appearance and size of the finished PCB. In the early days, we dealt with components having long leads by inserting them manually into plated through holes on the PCB. We then soldered the leads to form strong interconnections with [...]

Six Most Common Mistakes Made When Placing A PCB Assembly Order-

PCBA Assembly Order #1. Incorrect Gerber File Format for Stencil Paste Fix: The gerber format MUST be RS274X (opposed to RS274D). The RS274X format is the most current industry standard and includes aperture information in the gerber itself instead of requiring a separate aperture file.. (Google for "RS274X format") All current version CAD programs can generate the -X format although some may default to the older format for the sake of backwards compatibility.   #2. Missing a gerber file for stencil paste for one or both sides Fix: We need a paste layer in order to generate a paste stencil. [...]

OEM Electronic Manufacturer Multilayer SMT PCB Assembly

Technical description OEM Electronic Manufacturer Multilayer SMT PCB Assembly Material: FR4 TG135 Layer/Thickness: 2L/1.60mm Outer Copper:2 OZ Surface treatment: HASL LF Min. Hole Size:0.30mm Min. Line Width:0.20mm Min. Line Spacing:0.20MM Application field: Cateway Control & Network Devices & Automobile Unit