When the PCB design is completed, the laminate layer is determined, and the PCB board has been put into fabrication, the simulation evaluation found that the high-speed signal channel margin may be unsafe. Is there still a chance to improve?
Let's first introduce the loss classification of PCB. There are three
Do you know how PCB circuit boards are tested?
In general, all circuit boards should be 100% open for short circuit test before shipment. Automatic detection of circuit board is not only basic, but also necessary. What are the common test methods in complex circuit board testing?
Needle bed test method
The open circuit and
Do you know the advantages of PCB pouring copper on the surface of the PCB? In the whole process of PCB design, engineers want to ignore the link of pouring copper on the bottom of the PCB in order to save time. Is this right? Is it necessary for the PCB to pouring copper on the bottom of
If you do not pay attention to the ground layer during PCB design, the circuit board may not achieve the expected performance and may suffer from various forms of electrical noise and interference. Let's take a look at what is a PCB ground plane and some tips on how to
PCB raw materials will continue to increase in price in 2021
PCB raw materials include copper foil, fiberglass, resin and other related materials have been reported of price adjustments in Q1 of 2021.Recently, from CCL factory to PCB factory, we have received notices about product price increase.Even PCB industry has fired the first shot,
In the design of the circuit board, with the rapid increase of frequency, there will be many interferences different from the design of the low frequency PCB. As the frequency increases and the contradiction between the miniaturization and cost reduction of PCB boards becomes more and more prominent, these interferences
Ceramic circuit boards are actually made of electronic ceramic materials and can be made into various shapes.Among them, the ceramic circuit board has the characteristics of high temperature resistance and high electrical insulation performance, and has the advantages of low dielectric constant, low dielectric loss, high thermal conductivity, good chemical
PCB materials types included HB sheet and V0 sheet
HB sheet has low flame retardancy and is mostly used for single-layer PCB. VO sheet has high flame retardancy. It is mostly used in double-sides and multi-layer boards. This type of PCB sheet meets V-1 fire rating requirements and becomes FR-4 sheet.
In the early PCB manufacture, HASL is the most widely used surface treatment, which has excellent welding performance and low cost.With the high precision PCBs developing, it is difficult to below the surface to smooth of HASL, which brings difficulties to SMT mounting. In addition, the service life of HASL
Via, through hole, blind hole, buried hole, partial depth hole, countersink hole, back drilling and press-fit hole, is it very dizzy? I will take you to know all kinds of holes in PCB.
PCB via
PCB via is an important part of PCB. It is the electrical connection guide hole between different
