Printed circuit board structure

The utility model provides a printed circuit board structure, including the first line layer, first dielectric layer, the second line layer, second dielectric layer, third circuit layer, third dielectric layer and the fourth circuit layer that from top to bottom sets gradually, printed circuit board structure is still including electrically conductive blind hole, the blind hole only by extend to in the fourth circuit course third circuit layer, just be full of the medium filler in the blind hole. The utility model discloses can guarantee the integrality of signal, effectively eliminate the reflection problem in the design circuit board, have simple structure, characteristics with low costs. 本实用新型提供了种印刷电路板结构，包括由上至下依次设置的第线路层、第介质层、第二线路层、第二介质层、第三线路层、第三介质层和第四线路层，所述印刷电路板结构还包括导电的盲孔，所述盲孔仅由所述第四线路层向上延伸至所述第三线路层，且所述盲孔内充满介质填充物。本实用新型可保证信号的完整性，有效消除设计电路板中的反射问题，具有结构简单、成本低的特点。