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After cutting a few chips, mortar density is getting lower and lower
- Iron powder and silica fume more and more, the density should be more and more big, unless it is your water content is higher and highers
Manufacturers of solar wafers belong to the photovoltaic industry which specific industry classification below
- Photovoltaic involves a lot, but the company makes silicon chips in terms of, so if the use of photovoltaic culvert cover, too general, I need a detailed classification of the industry, and then go to the specific industry analysiss
The last time you gave me the answer to the silicon chip, I learned a lot
- I'm sorry, I really know that. The composition of sapphire is alumina.This is the information I found on the Internet to help you.SapphireEnglish Name: sapphire.s
The microprocessor integrates the computer with what is on a small silicon chip
- Arithmetic unit, a computer that performs arithmetic and logic operations. The basic operation of the device, including addition, subtraction, multiplication, division of the four operations, and, or, not, XOR logic operations, as well as the shift, comparison and transfer operations, also known as arithmetic logic unit (ALU).s
Why do you want to make the wafer bigger?
- The cost of the chip is directly related to the area. On the same chip, the more chips can be carved, the lower the price of the chip. Because silicon chips are inevitably produced defects (such as impurities, etc.). The larger the area of a chip, the higher the probability of the collision, and the higher the proportion of the whole wafer. A chip to do one hundred chips, a defect is 1\%. If only do ten, out of a defect is 10\%. An extreme example is the large CCD, professional camera or digital camera with the CCD is 23.7x15.6mm, light by the light area of 370 square millimeters, quickly catch up with the area of the high-end RISC processors
What are the reasons for the phenomenon of monocrystalline silicon chip
- Preventive measures are in the ultra clean environment, indirect or direct contact with the silicon process, can not have any metal objects, especially stainless steel, is determined not to appear. There's a silicon chip! It is necessary to ensure the cleanliness of the chemical cleaning liquid, and the ratio is correct. Otherwise, it will also appear on the surface of the silicon wafer. Check polishing machine polishing head, calibration pressure. Also, there can not be bad to the silicon wafer, belonging to scrap wafers, shall be returned to the original factory to find the reasons.s
What are the aspects of silicon wafer testing?
- Wafer inspection the main test items are: side, diagonal, chamfer, thickness, TTV, line, chipping, cracks, warping, oil, resistivity, lifetime.s
What is a silicon wafer
- Is usually used in high-end IC and special IC, such as Si on insulator (SOI) wafer. In the production process of IC, need some wafer to test the status of the production process, such as the level of particle, the etching rate, defect rate and so on, these are often called wafer control chip, the control plate is also used with normal production batch process together to test the quality condition of a process, such as the CVD film thickness. In the production equipment maintenance or repair, immediately production batch of wafer, easy to cause the scrap, and usually use some very low cost wafer to run the process to determine the quality of maintenance or repair work, which is usually called wafer dummy wafer, of course, sometimes dummy wafer also can be used in the normal production process, such as machine must wafer to process a number of problems with dummy wafer complement, and some machines must be in the process of a certain number of wafer A form of dummy run, otherwise the process can not guarantee the quality and so on many wafer and so on can be called dummy. block basically can be regarded as a kind of.Dummy wafer dummy, wafer control chip, a guard sheet usually can be recycled.s
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