PCB HDI board of proofing and blind buried the difference between the orifice plate

HDI is a kind of PCB products, high density interconnect board at present, the advanced electronic products are generally HDI board products. Blind holes, blind holes is to leave the PCB inner line connected to the PCB surface of the hole type, this hole is not through the whole board. Buried hole: buried hole only connection between the inner line hole type, so from the PCB surface is look not to come out. With the design of portable products toward the direction of miniaturization and high density, PCB design difficulty is becoming more and more big, the production process of PCB put forward higher requirements. At present most of the portable products zero. BGA encapsulation, under 65 mm spacing should be used in the design of buried blind hole process, so what is a blind hole buried? Have buried blind holes of the PCB is not necessarily the HDI PCB, but generally HDI board has blind hole, buried hole is not necessarily, to see your PCB products is the product of a few order pressure. Instructions are as follows: 6 layers PCB in order, second order is the need for laser drilling of the board, namely the HDI board. 6 layers PCB first-order HDI board refers to the blind hole: 1 - 2, 2 - 5, 5 - 6. The 1 - 2, 5 - 6 laser drilling. 6 layers PCB second-order HDI board refers to the blind hole: 1 - 2, 2 - 3, 3 - 4, 4 - 5, 5 - 6. That is 2 times the laser punch. Drill 3 - in the first place 4 buried hole, then pressing 2 - 5, then drill 2 - for the first time 3, 4 - 5 laser hole, then time pressing 1-2 6, then drill 1 - for the second time 2, 5 - 6 laser hole. The last to drill hole. Thus the second order twice pressing after the HDI board, two laser drilling. The other two order HDI board is divided into: wrong hole second-order HDI board and pile hole second-order HDI board, wrong hole second-order HDI board is refers to the blind hole - 1 2 and 2 - 3 is staggered, and fold the second-order HDI board is refers to the blind hole hole 1 - 2 and 2 - 3 fold together. For example: blind: 1 - 3, 3 - 4, 4 - 6. Are the same. Rocket PCB Solution co Ltd is a professional: PCB manufacture manufacturer, to provide you with: PCB proofing, batch plate, 1 - 34 layer PCB board, high TG board, impedance board, HDI board, Rogers plate, microwave plate, radio frequency (rf) board, LeiDaBan, thick copper foil board, such as PCB manufacturing production of various kinds of technology and material. Welcome to consult customer service for more details.