Seektronics

  Stripping   In the production of PCB boards, there are only two steps in which stripping is used. The D/F stripping process is simple, using horizontal equipment, and the chemical solution used is mostly 1~3% NaOH or KOH by weight.   Line etching   1. The mechanism of copper etching   (1) copper ions in the alkaline environment solution is easy to form copper hydroxide precipitation, in order to prevent this precipitation phenomenon, you need to add enough ammonia to make the wrong ion group to produce ammonia copper to inhibit the precipitation occurs. It also allows the copper's original amount and its continued dissolution in the liquid to form a very stable wrong ammonia copper ion. Such divalent copper ammonia ion can be used as an oxidizing agent to dissolve the zero-valent copper metal by oxidation. Still, during the redox reaction, monovalent copper ions will be produced.   In this reaction, the solubility of sub-copper ions is very poor, it needs to be assisted by ammoni

  With the poor global economic conditions and slowing demand for PCs and smartphones, Samsung, Micron and SK Hynix have suffered serious setbacks in their performance. Let's see how these giants turned around beautifully under the cold winter economy.     Samsung Ramped up factory construction and stable cooperation   Samsung has been the dominant player in the global NAND market and was able to account for 43.6% of the NAND market, but this year, Samsung DRAMD's Q3 revenue was $7.4 billion, down 34% sequentially.   Although storage revenue is not optimistic, but recently, Samsung's foundry side of the revenue of $5.58 billion, for the first time more than the main flash business NAND Flash flash memory business revenue of $4.3 billion, it can be seen that Samsung is making great efforts to fill the gap in the performance of the flash memory market, in order to maintain competitiveness, wafers and flash memory always have to be the top pillar of the business.   Samsung has

From a professional point of view, the production process of a chip is extremely complicated and tedious. But in terms of the complete IC industry chain, it is mainly divided into four parts: IC design → IC manufacturing → packaging → testing.   Chip fabrication process.   I. Chip design   Chip belongs to the small size, but great high precision products. To make a chip, design is the first link. The design needs to be done with the help of EDA tools and some IP cores, and finally made into the chip design blueprint needed for processing.   II . sand-silicon separation   All semiconductor processes start with a grain of sand. Because the silicon contained in the sand is the raw material needed to produce the silicon wafer, the "foundation" of the chip. So our first step is to separate the silicon from the sand.     III . silicon purification   After the silicon is separated out, the rest of the material is discarded. The silicon is purified in several steps to achieve the qua

  Artificial intelligence chips mainly include NVidia GPU, Google's TPU, Intel's Nervana, IBM's TreueNorth, Microsoft's DPU and BrainWave, Baidu's XPU, Xilinx's xDNN, Cambrian chip, Horizon and Deepview's AI chip, etc. Basically, GPU, FPGA, and neural network chips are the three major trends. The three chips have their own advantages and disadvantages and are all geared toward their own unique market segments. This chapter first talks about the rise of deep neural networks and NVidia GPUs.   The ultimate goal of artificial intelligence is to simulate the human brain, which has roughly 100 billion neurons and 100 trillion synapses, capable of handling complex vision, hearing, smell, taste, language skills, comprehension, cognitive abilities, emotional control, control of complex body mechanisms, complex psychological and physiological control while consuming only 10 to 20 watts of power.   These are the basic neurons and synapses of the human brain.     The i

  What are the constituent materials of the chip?   Silicon is mainly refined from quartz sand, wafers are silicon elements to be purified (99.999%), followed by the pure silicon made of silicon wafers, which become the material for the manufacture of integrated circuits quartz semiconductor, will be sliced is the chip production specific wafers required. The thinner the wafer, the lower the cost of production, but the higher the requirements of the process.   Some people may ask, there are so many semiconductors, why would choose silicon to produce chips? In fact, the main reasons for choosing silicon as the raw material for chips are the following ：   1.  Silicon is the second most abundant element on earth, it is easy to find the raw material for purification, and silicon-related treatment process has been developed for decades, which is very mature compared to other elements.   2.  Silicon is cheap and easy to promote.   3. S ilicon is chemically stable, so the stability of the man