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 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
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
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
Try to design PCB stackup by yourself Basic information about PCB stackups: PCB is build from three basic materials: Copper foil, Prepreg, CoreStandard Copper foil thickness: 5um, 12um, 18um, 35um, 70umStandard prepreg thickness: 65um, 100um, 180umStandard core thickness: 0.15mm, 0.20mm, 0.36mm, 0.46mm, 0.56mm, 0.71mm, 1mm, 1.2mm, 1.5mm, 2.0mm, 2.4mm, 3.2mm. Core is supplied with copper … Continued