Recently, SiChuan province river basin water the pollution prevention and control of special law enforcement inspection continues,under 30℃high temperature with the scorching sun,walking in the footsteps of did not stop continue ahead step.at 2:30pm in the afternoon .DeYang and SuiNing inspection teams adopted the “four do not and two straight ”way of without giving notice.without … Continued
I believe you are familiar with PCB surface treatment technology .But what are the advantages and disadvantages of these processs compared with each other ? Bare copper: Advantages:low cost,smooth furface ,good weldability (before oxidation) Disadvantages:easy to be affected by acid and humidity ,and couldn’t keep for a long time,after opening the seal ,it needs to … Continued
As we know , it is easy to occur the bending for pcb in reflow oven, so let us see how to prevent this situation ? From our engineer suggestion , i summarize the following points for your reference . 1. To reduce the effect to temperature on PCB stress . 2. To … Continued
Electronic circuit design and schematic diagram creation.The schematic diagram cleary shoes how the value of knowledge evolved in china in the past 50 years. Come and design your own PCB! If you really want design your pcb,there are some comment: choose a computer assistant design safe to use in PCB design. Reference other people … Continued
The demand for halogen-free PCB has become larger and larger. Not only because of their low water absorption ,but also the environmental protection requirements. And halogen-free PCB can also meet the quality requirement in other performance . Let us know some detailed features of halogen-free materials as below , Insulation, The substitution of P or … Continued
The reason and solve for PCB films deformation The reason : (1) The temperature and humidity is out of control . (2) The exposure machine’s temperature is very high . The solve ways , (1) In general ,the temperature should be controlled under 22±2℃,and humidity should be controlled under 55%±5%RH (2) Using the clod light or the … Continued
In printed circuit boards ,there are so many holes which involves drill process .Now , let us study some drill styles and its characteristic . … Continued
Difference between Immersion gold and Plating gold. There are some usual kinds of surface Treatment ,including OSP(Organic Solderability Preservatices) ,HAL(Hot Air Leveling ),Electrolytic Ni/Au ,Immersion Au and so on . Especially the demand for gold boards is large,the reason is that gold have strong conductivity ,anti-oxidation ,long life , and in factual using ,90% people prefer to immersion Au instead … Continued
The printed circuit board is not vacuum packaging until becoming OK board,means that it is passed in the final quality control,and then would be shipped for you. Why does package with vacuum? How to protect after the vacuum package ? How long can … Continued
For customer service, Sayfu engineer will share their experience on FPC lamination, which is very usefull for flexible PCB design house, PCB plant etc. Please see below pic for your record.
Section 1 definition of PCB potionPCB (PrintedCircuitBoard), Chinese name called printed circuit board, also known as the printed circuit board, printed circuit board, is an important electronic components, electronic components to support the body, the provider of the electrical connection in the electronic components.Because it is made of electronic printing, it is called “printed” circuit … Continued
IPC-6012 “Rigid Printed Board Identification and Performance Specification” standard covers the identification and performance of rigid printed boards, including single-sided, double-sided and with / without blind holes / buried holes with or without plated via Metal core panels; also covers the final product and surface plating coating requirements, conductor, via / vias, acceptance test frequency … Continued