PCB Technical - Related PCB Technology Blog Posts page 207

2021-08-20

In the design of high-speed PCB boards, via design is an important factor. It consists of holes, pad areas around the holes, and isolation areas of the POWER layer. They are usually divided into three types: blind holes, buried holes and through holes.

2021-08-20

Radio frequency (RF) circuit board design is often described as a kind of "black art" because there are still many theoretical uncertainties, but this view is only partially correct. RF circuit board design also has many guidelines that can be followed and should not be Ignored law.

2021-08-20

When the diameter of the via hole gets smaller and the thickness-to-diameter ratio gets higher, it becomes more difficult to ensure good metal coverage in the hole. It is also very challenging to ensure the uniformity of the metal in the hole and protect the metal in the hole from being etched away during pattern plating and subsequent masking and etching.

2021-08-20

Land, the basic unit of surface mount assembly, is used to form the land pattern of the circuit board, that is, a variety of land combinations designed for special component types. There are two English words for pad: Land and Pad, which can often be used interchangeably.

2021-08-20

Circuit diagram is a graph that shows the circuit structure that people draw with agreed symbols for the needs of research and engineering. You can know the actual circuit situation through the circuit diagram. We can also use advanced computer software to assist in circuit design and even virtual circuit experiments.

2021-08-19

PCB manufacturing technology, including computer-aided manufacturing processing technology, that is, CAD/CAM, as well as light painting technology, the general process of light painting technology is: check the file-determine the process parameters-CAD file to Gerber file-CAM processing and output .

2021-08-19

The purpose of this document is to explain the process and some precautions for printed board design using PADS's printed board design software PowerPCB, and to provide design specifications for designers in a working group to facilitate communication and mutual inspection between designers.

2021-08-19

Today's society has higher and higher requirements for electronic engineers, who can not only design digital circuits, but also have the ability to handle analog circuits and PCB layout. Now let me talk about the things that must be paid attention to in the PCB layout of this kind of board that contains both digital and analog circuits.

2021-08-19

To do high-speed PCB design, you must first understand the following basic concepts, which are the foundation.

2021-08-19

Abstract: In SoC design, the coupling between signals will cause signal integrity problems. Ignoring the signal integrity problems may lead to crosstalk between signals, and reliability, manufacturability and system performance will also be reduced. This article describes in ASIC The method to solve the signal integrity problem in the chip design.

2021-08-19

With the increasing complexity of PCB design and the increasing demand for high-speed PCB design, more and more PCB designers and design teams choose Cadence's design platforms and tools.Combining the characteristics of existing tools, provide a method to convert Protel schematics and PCBs to the Cadence platform.

2021-08-19

Electromagnetic interference is widely present in all kinds of electronic and electrical equipment, and various electronic and electrical equipment will more or less emit electromagnetic waves when they are working, which will cause interference to the normal operation of the entire equipment.

2021-08-19

The first two articles on process defect problems and solutions mainly talked about substrates and negatives. This article focuses on some of the problems and solutions of the drilling process! Drilling is an important process in the PCB process, and it seems very simple. But in fact it is a very critical process. It is also prone to various problems.

2021-08-19

Negative film is one of the important raw materials used by pcb processing plants. It has the same working principle as the photographic film, so it has high requirements for storage and use conditions. In this issue, we will talk about the causes of some defects in the negatives and how to eliminate them.

2021-08-19

In order to ensure the high quality and high stability of the printed circuit board, and realize the comprehensive quality management and environmental control of the PCB factory, it is necessary to fully understand the characteristics of the printed circuit board manufacturing technology.

2021-08-19

PCB (PrintedCircuitBoard), the Chinese name is printed circuit board, also known as printed circuit board, printed circuit board. It is an important electronic component, a support for electronic components, and a provider of electrical connections for electronic components. Because it is made by electronic printing, it is called a "printed" circuit board.

2021-08-19

The circuit industry has become the key to the development of the national economy, and integrated circuit design, manufacturing, and packaging and testing are the three pillars of the integrated circuit industry. This is the consensus of leaders at all levels and the industry.

2021-08-19

Before explaining the inspection work after PCB wiring is completed, I will introduce three special wiring techniques for PCB. The PCB LAYOUT routing will be explained from three aspects: right-angle routing, differential routing, and serpentine routing.

2021-08-19

PCB is also called a printed circuit board (Printed Circuit Board), which can realize the circuit connection and function realization between electronic components, and it is also an important part of the power supply circuit design. Today, I will use this article to introduce high-frequency circuit wiring techniques in PCB design.

2021-08-19

In high-speed design, the characteristic impedance of the controllable impedance board and circuit troubles many Chinese engineers. This article introduces the basic properties, calculation and measurement methods of characteristic impedance through a simple and intuitive method.