Ordinary PCB is usually made of copper foil and substrate, and the substrate material is mostly fiberglass (FR-4), phenolic resin (FR-3), and other materials. The adhesive is usually phenolic, epoxy, etc. During the PCB processing process, due to thermal stress, chemical factors, improper production processes, etc., or due to the asymmetry of copper paving on …
The PCB board is an important step in the electronic process. Almost all electronic products on the market are composed of PCB boards. What elements are there on a normal PCB board? Normally, it will generally include borders, vias, through holes, copper laying and so on. Pad It is the metal contact area used for soldering …
There are many silk screen letters on the PCB, such as R109, c113, Q105, d206, etc. What do these letters / numbers mean? The letters on the PCB board represent the abbreviation of electronic components, and numbers often follow the letters, which are also meaningful. The Letters on PCB Board PCB Alphabet Meaning Table Letter Representative …
What is The Meaning of Silk Screen on PCB Board? Read More »
When you inspect PCB board, you must pay attention to some details. In order to be more prepared to ensure PCB board’s quality, we should pay attention to the following 9 tips. It is strictly forbidden to use grounded test equipment to touch the live TV, audio, video and other equipment of the bottom plate to test …
How to Inspect Short Circuit of PCB Board ? If it is manual welding, we should develop good habits Before welding, the PCB board shall be inspected visually and the key circuits (especially power supply and ground) shall be checked for short circuit with multimeter. After welding a chip, use a multimeter to test whether …
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Before Cleaning All connectors on the circuit board including jumper plug, card board, battery and IC must be carefully pulled out before cleaning. Potentiometer, transformer and solenoid coil (inductive coil) must also be removed from the circuit board. Note: non electronic professional do not do this operation, because if there is no electronic professional technology, …
For people who study electronics, it is natural to set up test points on the circuit board. But for people studying machinery, they might ask what are the test points. Maybe I’m still a little confused. I remember that when I first worked as a process engineer in a PCBA processing plant, I asked many …
On the PCB, designers often come across devices with metal casings. For example, reset button, USBinterface, network port, etc., but the shell of these devices, should be grounded? What place? Grounding Design Without Metal Casing No metal casing, PCB The components in the circuit board generally do not require grounding and cannot be grounded under …
