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PCB flying probe test operation skills

This article will share techniques such as alignment, fixing, and warping board testing in flying probe test operations for reference only. 1. Counterpoint The first thing to talk about is the choice of counterpoints. Generally, only two diagonal holes should be picked as counterpoints. ?) Ignore... Read More

PCB short circuit improvement measures —fixed position short circuit

The main reason is that there is a scratch on the film line or a blockage on the coated screen, and the exposed copper on the fixed position of the coated anti-plating layer causes the PCB to short-circuit. Improve methods: 1. Film negatives must not have trachoma, scratches, etc. The drug film s... Read More

Features of PCB micro-hole mechanical drilling

Nowadays, with the rapid updating of electronic products, the printing of PCB s has expanded from the previous single-layer boards to double-layer boards and multi-layer boards with higher precision requirements. Therefore, there are more and more requirements for the processing of circuit board ... Read More

Some small principles of PCB copying process

1: The basis for selecting the width of the printed wire: the minimum width of the printed wire is related to the current flowing through the wire: the line width is too small, the resistance of the printed wire is large, and the voltage drop on the line is large, which affects the performance of... Read More

Why your PCB is so expensive? (II)

  4.Different copper foil thicknesses cause price diversity (1) The smaller the quantity, the more expensive the price is, because even if you do 1PCS, the board factory has to do the engineering information, and out of the film, no process is indispensable. (2) Delivery time: The data deliv... Read More

Why your PCB so expensive? (I)

Part: various factors that affect the price of a PCB board The price of PCB has always been a puzzle to many buyers, and many people will wonder how these prices are calculated when placing orders online. Let’s talk about the components of PCB price together.   Different materials used in ... Read More

Spacing Requirements on Designing pcb

  Electrical safety distance   1. Spacing between wires According to the production capacity of PCB manufacturers, the distance between traces and traces should not be less than 4 mil. The minimum line spacing is also the line-to-line and line-to-pad spacing. Well, from our production point of v... Read More

India and southeast Asia outbreak escalation, how much impact on the electronics industry chain?

Since mid-to-late march, affected by the global spread of the epidemic, India, Vietnam, the Philippines, Malaysia, Singapore and other countries have announced “city closure” measures ranging from half a month to a month, causing investors to worry about the impact of the global elect... Read More

Latest analysis of the PCB market: global output in 2019 was about $61.34 billion, down slightly from a year earlier

PCB industry belongs to the basic industry of electronic information product manufacturing and is highly related to the macroeconomic cycle. Global PCB manufacturers are mainly distributed in China mainland, China Taiwan, Japan and South Korea, southeast Asia, the United States and Europe and oth... Read More

Infrared thermometer Introduction

The forehead gun (infrared thermometer) is designed for measuring the forehead temperature of the human body. It is very simple and convenient to use. Accurate temperature measurement in 1 second, no laser spot, avoid potential damage to eyes, no need to contact human skin, avoid cross infection,... Read More

Difference between KN95 and N95 Mask

KN95 is a standard Chinese mask. KN95 respirator is a kind of respirator with particle filtration efficiency in our country. KN95 mask and N95 mask are actually the same in terms of particle filtration efficiency.   KN95 is a Chinese standard mask, N95 is a U.S. standard N95 type mask is a NIOS... Read More

Remedy for copper foil falling off of Print circuit board in mobile phone repair

In the process of mobile phone repair, the copper foil of the circuit board is often peeled off. The reasons are as follows. First, maintenance personnel often encounter copper foil strips due to unskilled technology or improper methods when blowing components or integrated circuits. Second, p... Read More
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