Weak current College】 【buy chip considerations】.

General purchase chips if you have a volume of three 50 tablets, it is best to find agents or distributors and not to the General counter of the "marketing of goods in stock," get anything done in General (so-called marketing goods) counter of the spot is essentially refurbished goods or garage, and they see people quote, expert or someone you know most of them are afraid too far, but ordinary people they can mount on Mont, can cheat the cheat, this really is the more common phenomenon (people's moral collapse is full), we have to be more careful. Even in such a counter with the goods must be clear, the bad, and the need to remember to "shop around". In addition, the price should be lower than the price is a lot of it, or find the formal agents. Good to know a lot of processing the purchase price of the old chip is the only new movie market of 10%-20%!

Old movie player there are two methods: 1, hot air method, this method is a formal approach for a clean, neat plates especially valuable SMD plate. 2, "fried" method, it really is true, with a high boiling point to "fried" mineral oil, very old or very messy garbage plate usually use this method.

Here to talk to you about that old piece of separation and duplicate process waste if not properly handling causing serious pollution of the environment (including a large number of non-biodegradable toxic compounds and heavy metals), and "handling" fee will be much higher than full recovery, so some companies prefer to developed countries spend and freight will send "electronic waste" to China and South Asia in some developing countries rather than processed on their own, there is a "say". New post between the old chip is much irreparable loss of environmental pollution, that everyone must know!

Chip sales of formal Agent General in Office Office, huaqiang, SEG, ic37 also has many distributors new goods, most in the hall surrounding independent rooms, a small number of counters, we should pay attention to when purchasing a chip.

Difference between the original and genuine goods and refurbishment of cargo is mainly:

1, see the chip surface is polished. Where polished surface of the chip will be fine even before printing of the mark, to cover also the chip surface coated with a thin coating, look a little shiny, no plastic material.

2, see Printing. Now the majority of chip using laser marking or ASIC press printing, writing clear, neither prominent nor vague and difficult to erase. Refurbished chip or writing edge corrosion by cleaning agent and a sense of "sawtooth", or printing blur, depth, location, easy to erase or too conspicuous. In addition, the screen printing process for IC manufacturers now have been eliminated, but a lot of renovation cost reasons chips are still using screen printing technique, which is also one of the judgment, silk words slightly higher than the chip surface, fingered can feel slightly uneven or fat astringent sensations.

3, see PIN. Where a luminous like "new" Tin PIN will be renovated, as the vast majority of cargo IC pins should be the so-called "silver feet", color darker but colors uniformly, the surface should not have the oxidation marks or "flux", DIP, etc. plugins pin should not have scratches the flower trail, even with (packing will again) scratches should be neat, in the same direction and smooth metal exposure at no oxidation
4, see device production date and packaging plant label. Are the goods labels including chip bottom face labels should be consistent and production time and device products phase, but did not Remark on refurbished slice labels confusing, time of production. Although the Remark of the chip, and so on the front label, but sometimes the numerical anomaly (such as the number of marked "lucky") or production date and device products in conformity with, the underside of the label if the device is very confusing and description of the device is the Remark.

5, measuring devices and devices of edge thickness. Many laser printing of Polish refurbished tablets (power devices mostly) due to removal of the original mark, must be polished deeper, so the overall thickness of the device will be significantly smaller than normal size, but does not compare or use callipers to measure, general inexperience or it's hard to tell, but there is an alternative method, that is, see the see through the device front edge. Because of the plastic parts molding after "stripping", so the device edge angle round (R), but the size is not large, the polishing process is very easy to make this round grinding angles, so the device front edge once a right angle, you can judge for grinding.

In addition, another method is to see whether there is a wide range of businesses in the original packing material, including logos and consistent tray, anti-static plastic bag, etc., should be more in actual distinguished Fawzi, there is a problem you can identify devices of goods quality.

In addition, some counters at the insist customers may also be brought under the new stock, but certainly is true from those who do a new piece of businesses in picks, but it will definitely go with customers that have the goods to the Treasury, we don't take it seriously!

In short, the use of refurbished goods! more don't poke "!!!"