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Basic principles of PCB layout
ByGrace November 30, 2024November 28, 2024
PCB layout check 1) Whether the size of the circuit board meets the processing size required by the product drawing. 2) Whether the layout of the components is balanced, neatly arranged, and well arranged. 3) Whether there are conflicts at all levels. For example, components, frames and silk screens should be reasonable. 4) Common components…
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Improvement method of hole/permeation problem when using PCB dry
ByGrace November 30, 2024November 27, 2024
Dry film masking holes appear broken Many customers believe that after the occurrence of broken holes, the film temperature and pressure should be increased to enhance the bonding force. In fact, this view is incorrect. Because the temperature and pressure are too high, the solvent of the resist is excessively volatilized and dried. The film…
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Why should the PCB board “paste gold”
ByGrace November 30, 2024November 27, 2024
1 PCB board surface treatment Anti-oxidation, spray tin, lead-free spray tin, immersion gold, Shen tin, Shen silver, hard gold plating, the whole board gold-plated, Goldfinger, nickel palladium Gold OSP: the cost of the end, good solderability, storage conditions harsh, time Short, environmentally friendly technology, welding is good, smooth. Spray tin: spray tin plate is generally…
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How to do the RF work well
ByGrace November 30, 2024November 27, 2024
A RF product engineer should have what knowledge, how to do the RF product work well. There is a dozens of discussion stickers on this issue, it seems this is a common problem. So how can the RF products work well? Can say that no one would say that this or that way, we can…
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Listen to engineers explaining PCB layout experience
ByGrace November 30, 2024November 28, 2024
For electronic products, printed circuit board design is a design process that must be passed from electrical schematic to a specific product. The rationality of its design is closely related to product production and product quality. For many people who are just engaged in electronic design, there is less experience in this area. Although they…
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How to improve the wiring efficiency in PCB design
ByGrace November 30, 2024November 28, 2024
The wiring is an extremely important part of the PCB design and it will directly affect the performance of the PCB board. In the PCB design process, layout engineers all have their own understanding of the layout, but all layout engineers are consistent in how to improve the efficiency of wiring, so that not only…
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The influence and requirements of different manufacturing processes on the pads on the PCB
ByGrace November 29, 2024November 27, 2024
1. The test points must be added to the components of the chip components that are not connected to the plug-in components. The diameter of the test points is between 1.0mm and 1.5mm, which is convenient for online tester testing. The edge of the test pad is at least 0.4 mm from the edge of…
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The difference and advantages and disadvantages of gold plating and immersion gold process
ByGrace November 29, 2024November 26, 2024
(1) Why use gold-plated plates? As ICs become more integrated, the IC pins are more dense. The vertical tin-spraying process is difficult to flatten the fine pads, which makes the placement of the SMT difficult; in addition, the shelf life of the tin-plate is very short. The gold-plated plate solves these problems: 1 For the…
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Reasons for instability of PCB electroless nickel plating solution
ByGrace November 29, 2024November 26, 2024
First, the reason for the instability of electroless nickel plating solution 1. When the gas slowly releases the plating solution from the inside of the plating solution and starts to decompose by itself , the gas is not only released on the surface of the plating member, but also slowly and uniformly discharged in the…
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PCB design basics
ByGrace November 29, 2024November 26, 2024
Printed circuit boards (PCBs) appear in almost every electronic device. If there are electronic components in a device, they are also mounted on PCBs of various sizes. In addition to fixing various small parts, the main function of PCBs is to provide electrical connections between the various parts on them. As electronic devices become more…
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Why can’t the crystal oscillator be placed on the edge of the PCB
ByGrace November 29, 2024November 27, 2024
A dashcam needs to add an external adapter when testing. When the machine is powered on and tested, it is found that the radiation exceeds the standard. The specific frequencies are 84MHz, 144MHz, and 168MHz. It is necessary to analyze the reasons for the excessive radiation and give corresponding countermeasures. The radiation test data is…
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A brief discussion on key materials for high-frequency microwave RF PCB circuit boards
ByGrace November 29, 2024November 26, 2024
The circuit materials of printed circuit boards (PCBs) are key building blocks of radio frequency (RF)/microwave circuits – essentially the starting point of these circuits. PCB materials come in many different forms, and the choice of materials depends largely on the requirements of the intended application. For example, materials that reliably support high-frequency circuits in…
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Ten problems about PCB defects
ByGrace November 29, 2024November 28, 2024
1.[Delamination] Delamination is a long-standing problem of PCB, and ranks first among common problems. The reasons for its occurrence may be as follows: (1) Improper packaging or storage, dampness; (2) Storage time is too long, exceeding the shelf life, PCB board dampness; (3) Supplier material or process problems; (4) Poor design material selection and copper…
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Recommendation for ARM and embedded linux
ByGrace November 29, 2024November 27, 2024
As many people always ask this question, so here to make a summary document for your reference. Here must first explain the following steps are for the Linux system, not for WinCE. Perhaps you will notice that now do embedded people, people who do linux research is far more than people who do WinCE, many…
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Let you know about the immersion gold process in PCB
ByGrace November 29, 2024November 26, 2024
The advantage of the immersion gold process is that the color deposited on the surface of the printed circuit is very stable, the brightness is very good, the coating is very flat, and the solderability is very good. The thickness of the gold in the immersion gold is generally 1-3 Uinch, so the thickness of…
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advanced circuits 4pcb

Basic principles of PCB layout

Improvement method of hole/permeation problem when using PCB dry

Why should the PCB board “paste gold”

How to do the RF work well

Listen to engineers explaining PCB layout experience

How to improve the wiring efficiency in PCB design

The influence and requirements of different manufacturing processes on the pads on the PCB

The difference and advantages and disadvantages of gold plating and immersion gold process

Reasons for instability of PCB electroless nickel plating solution

PCB design basics

Why can’t the crystal oscillator be placed on the edge of the PCB

A brief discussion on key materials for high-frequency microwave RF PCB circuit boards

Ten problems about PCB defects

Recommendation for ARM and embedded linux

Let you know about the immersion gold process in PCB

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