The knowledge of U disk chip

Many friends buy u disk, only focus on the U disk capacity and price, and ignore the U disk chip quality problems. In fact, the chip is the core of the U disk components, in the purchase of USB stick before, we must understand the knowledge of the chip, the following for everyone to add.

U disk storage of the core components are known as "Flash flash" chip, its cost determines the finished product U disk price high and low, the market, a variety of brands of u disk products show Different price grades, largely because of the use of "flash flash" chip differences.

Flash memory chip is divided into authentic flash, black flash, etc.

Authentic Flash refers to the formal brand flash, generally for Korea, Japan factory brand, such as "Samsung", "Hyundai", "Hitachi", etc. used as a brand U disk flash memory is mainly "modern", "Beautiful Light"; Samsung "High speed flash memory price is about 20 yuan higher than these two brands, generally used for high-end MP3, MP4." and the U disk large number of use of "modern" and "Mei Guang" two brand prices are basically converging.

The so-called "black film", there are basically two kinds, one refers to Samsung, Toshiba, Hyundai and other manufacturers to eliminate the defective products, the second refers to the market recycling of second-hand flash chips. As the chip manufacturers in the production of flash chips, the wafer production is graded, can be divided into 99% capacity, 97% capacity, 93% capacity and so on. Grades below 93% capacity below the wafer are no longer hit the original logo sales, but will not be thrown away, into Taiwan or the mainland small packaging plant, flow to the black chip market. Some manufacturers take advantage of the low grade of the wafer, after grinding, affixed to Samsung or modern logo after the sale. These substandard chips are inexpensive but can be used basically, but with less capacity. But after the black chip market, because the people do not have the corresponding technical ability, the chip's bad block can not be shielded, so the bad zone is very easy to spread. More alarming to touch the purpose is that some manufacturers secretly in the chip to do, directly with the 64MB chip 128MB products, with 128MB chips to do 256MB products, these chips called "Upgrade", and then use software to deceive the system, thus profiteering, the general consumer difficult to identify the authenticity.

At present, chip products are becoming more and more diversified. For example, the same "modern" 512M chip, is divided into three kinds, 1G, and there are other distinctions, their prices may vary by 10 to 20 yuan, Samsung 1G chips, divided into two, the price difference of 20 to 40 yuan, the difference between the transmission speed and capacity of the difference. The general price of the U disk is low, you have to think more, it is possible to use the black film, upgrade film; quality is the guarantee of credibility, in order to protect your data worry-free, please buy the regular brand U disk.

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