The PCB board is composed of copper foil, resin, glass cloth and other materials. The physical and chemical properties of each material are different. After being pressed together, thermal stress will inevitably occur, which will cause deformation. At the same time, in the PCB processing process...
When desoldering, erect the pcb circuit board (multi-layer circuit board), while heating the pin solder joints of the components to be removed with an electric soldering iron, Hot Air Solder Leveling (HASL) For Printed Circuit Boards, use tweezers or needle-nose pliers to clamp the component ...
Lean manufacturing principles Idea solicitation system Standardized corrective actions Process audits This framework of aligned quality practices minimizes common PCB and PCBA defects to maximize manufacturing yields. Defect Prevention Guidelines Here are some key guidelines for avoiding frequent PCB and PCBA ...
对于给定的下面的一段计算香农信息熵的python程序，则其输出结果应该为下面的哪个选项？ import numpy as np def calc_ent(x): x_value_list = set([x[i] for i in range(x.shape[0])]) ent = 0.0 for x_value in x_value_list: p = float(x[x == x_value]......
Nothing affects the PCB’s total cost and reliability as much as the initial design, but what are important to think about when designing a reliable PCB? In this page we have collected everything you need to know about printed circuit board design – including our design guidelines, design ti...
The PCB lamination process is essential for creating multilayer boards by fusing together insulating and conductive layers into anintegrated circuitboard. Understanding lamination principles helps PCB designers fully utilize the capabilities of this transformative fabrication step. Tight process controls and mat...
it is not easy to have problems. The layout of components and traces during PCB proofing has a great impact on the product's life, stability, and electromagnetic compatibility, and should be paid special attention to. Generally speaking, there should be the following principles: placement order,...
Principles of RF Circuit Board Layout When designing RF PCB layouts, the following general principles should be given priority consideration: (1) High power RF amplifiers (HPA) and low noise amplifiers (LNA) should be isolated as much as possible. ...
So understanding the PCB meaning is one of the most basic things for you. Essentially, a PCB is a system of conductive patterns located in the volume and on the surface of a dielectric base, interconnected by the circuit diagram. Many types of PCBs are very different. However, the normal ...
Process control, monitoring, and inspection: An ongoing task in managing the electronics supply chain is the monitoring of quality assurance methodology, often based on best quality practices like six sigma principles, with specific recommendations for process control, testing, and inspection of PCBs an...