1, plate: multi-layer board are using Shengyi /KB A-grade copper-clad plate /PP, Sun/Guangxin ink. As a recognized leading enterprise in the copper clad plate industry, Shengyi board products are used in a large number of cutting-edge PCB factories around the world, and multi-layer board guarantees the excellent performance of PCB finished products from the source.

　　2, hole copper :PCB production has always strictly followed the IPC secondary standard, the thinnest hole copper of the finished product is greater than 20um, beyond the IPC -- level standard! Due to good plating uniformity and strong deep plating ability,PCB dares to ensure smooth and uniform copper plating of the hole and hole wall, and there is no serious uneven copper plating similar to "10 um somewhere, 30 um somewhere" If the user finds the thinnest copper of the finished hole is less than 20um,PCB promises a full refund;

　　3, line width and line distance: according to the control of 20% of the soil shipment, but the law according to the production of 10% of the soil to meet IPC level 3 standards;

　　4, impedance: multi-layer board impedance can be achieved by 10%, but also according to user needs to achieve 5%;

　　5, BGA plug hole: dare to promise that the plug hole is opaque, the hole disk is not red;

　　6, heat resistance: the multi-layer board has passed the thermal shock standard under the IPC standard: 288 degrees Celsius; 10 seconds to withstand 3 thermal shocks without stratification;

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