At present, electronic components are developing rapidly, and ICs are also various in the market. If you do not pay special attention to distinguishing them, sometimes it is difficult to see what is different. In this way, the lack of experience in purchasing will not be able to distinguish the original electronic components, resulting in significant economic losses. How to distinguish the original IC and the new IC? Let‘s talk about how to distinguish them. See the following six points.

One. See if there are any traces of grinding on the surface of the chip

The surface layer of the polished chip has fine lines and even micro-marks printed a long time ago, and some are coated with a thin layer of paint to cover up the surface layer of the chip, which is particularly shiny and has no plastic texture.

Two. Look at the print

1. A large part of today‘s chips are marked by laser or printed with special chip printing equipment. The handwriting is clear, unobtrusive, not blurred and not easy to erase. The refurbished chips are either because the edges of the writing are corroded by the cleaning agent and have a "jaggy" feeling, or the printing is blurred, the shading is not specific, the location is not correct, it is very easy to erase, or it is too conspicuous.

2. Silk-screen printing technology Today‘s large IC factories have long been eliminated, but many chip renovations still use silk-screen printing technology due to production costs. This is also an important basis for distinguishing. The words on the silk screen will be slightly higher than the chip surface layer. You can feel the slight unevenness or astringency when you touch it. However, in recent years, there have been more and more problems in changing chip marks with laser marking machines, especially in terms of memory and some high-end chips. If you find that there are some uneven English letters and strokes of words in the specific position of laser printing If the thickness is not uniform, it can be judged that it is refurbished.

3. The main method is to look at the overall coordination. The handwriting and the situation, and the level of the newness of the feet do not match. For example, if the wordmark is too new or too clear, there is a high possibility of problems, but many small factories, especially domestic ones. The chips of some small IC factories are born like this, which brings a lot of inconvenience to the identification, but this method is still very meaningful for the identification of chips in mainstream large factories.

Three. Look at the pins

All tin-plated pins that are as bright as "new" must be refurbished and refurbished. A large part of the pins of genuine ICs should be "silver powder pins". The color is dark but the appearance is evenly distributed, and the surface layer should not be oxidized. There should be no scratches or "flux" on the pins of other plug-ins, and even if there are scratches (only after packaging again), the scratches should be neat, in the same direction, and the exposed metal should be clean and free from oxidation.

Four. Look at the date of manufacture of the components and the model of the packaging factory

The model of the genuine product, including the model of the bottom edge of the chip, should be the same and the manufacturing time should be consistent with the component product, while the model of the unrefurbished piece is disordered and the manufacturing time is different. Although the front model of the chip is the same, sometimes the value does not conform to common sense (such as which "auspicious numbers" are marked) or the date of manufacture does not match the product of the component.

Five. Measure the thickness of components and look at the edges of components

1. Many original laser-printed refurbished and refurbished sheets (most of which are power devices) must be polished deeper to remove the original marks, so that the overall thickness of the components will be significantly lower than the normal size, but do not compare or use calipers Measurements, usually inexperienced people are still difficult to distinguish, but there is a workaround debunking, that is, look at the front edge of the component.

2. Since the plastic-encapsulated components must be "released" after injection molding, the edge corners of the components are rounded (R-angle), but the size is not large. It is very easy to grind the rounded corners into a right angle during grinding processing, so the components If the front edge is right-angled,

​​Six. Look at the outer packaging

In addition, there is another way to see if the seller has a large amount of original packaging, including a unified cardboard box inside and outside the logo, anti-static plastic bags, etc. In the specific identification, multiple methods should be used, and there is one place. The problem can determine the quality of the components.

It is still necessary to pay attention to distinguish the original IC and the new IC, so as to buy genuine products and avoid economic losses. ShenZhen Hao Qi Core Technology is recommended as an IC supplier of electronic components, with ten years of import experience, authorized by well-known brands at home and abroad, complete models, and direct supply from stock. Sign a guarantee agreement, so that customers can buy with confidence. As well as strong transportation management and sales agency capabilities, we can solve customer inventory management through the company‘s multi-dimensional resources. With more than ten years of experience in the industry, we have accumulated rich solution experience and designed highly matching solutions. More than 100 well-known engineers at home and abroad communicated and cooperated with the IC laboratory of electronic components. Provide professional technical support. Let customers buy with confidence and use with confidence. Make the product practical.