Speaking of blind and buried via boards, everyone's understanding and understanding of blind and buried via boards are very vague. Some circuit board manufacturers can't tell what is a blind and buried via board, how to look at it, and how it is. Blind hole board, what is a buried hole board, the definition and difference of a buried hole board; let's talk about the history of circuit boards: the name circuit board came from the 20th century before the beginning of the 21st century. Products have developed by leaps and bounds in technology, and electronic assembly technology has been rapidly improved. As a high-quality circuit board manufacturer of printed circuit boards, only continuous innovation and continuous improvement of the application range and performance of products can meet the needs of customers who are growing rapidly.

　　With the small, light and thin volume of electronic products in circuit board factories, printed circuit boards have developed flexible boards, rigid-flex boards, buried blind via boards, etc. First of all, let's start with traditional multi-layer boards. The structure of a standard multi-layer circuit board includes inner and outer layers, and then uses drilling and metallization processes in the holes to achieve the internal connection function of each layer of circuits. However, due to the increase in circuit density, the packaging method of parts is constantly updated. In order to allow more and higher performance parts to be placed in the limited circuit board area, in addition to the thinner circuit width, the aperture is also reduced from 1mm of DIP jack to 0.6mm of SMD, and further reduced to less than 0.4mm. However, it will still occupy the surface area, so there will be buried holes and blind holes. The definitions of buried holes and blind holes are as follows.

　　Buried Via

　　The buried hole is the through hole between the inner layers. After pressing, it cannot be seen, so it does not need to occupy the area of the outer layer. The upper and lower sides of the hole are in the inner layer of the circuit board, in other words, it is buried inside the circuit board. . To put it simply, it is sandwiched in the middle, and these processes cannot be seen from the surface. Therefore, before producing the buried hole board, you must carefully ask and understand the documents, or it will be troublesome!

　　Blind Via (BlindVia)

　　The blind hole plate is used for the connection between the surface layer and one or more inner layers. One side of the hole is on one side of the circuit board, and then it leads to the inside of the circuit board; simply put, the surface of the blind hole can see one side. The other side is in the circuit board, which is invisible, just like a well in our daily life. There is only one opening on the surface, and the water leads to the ground. For circuit board proofing, I recommend you to try it at the circuit board factory. Here, the circuit board proofing is priced online, with fast response, affordable price, fast speed and good quality. Through the above introduction, I hope everyone can have a certain understanding of the blind and buried hole board. learn.

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