High precision of circuit boards refers to the use of techniques such as fine line width/spacing, micro holes, narrow ring width (or no ring width), and buried and blind holes to achieve high density. And high precision refers to the requirement for high precision that results from being "fine, small, narrow, and thin". Taking line width as an example: a line width of 0.20mm, producing 0.16-0.24mm according to regulations is qualified, with an error of (0.20 ± 0.04) mm; And for a line width of 0.10mm, the same error is (0.1 ± 0.02) mm. Obviously, the accuracy of the latter is doubled, and so on is not difficult to understand. Therefore, high-precision requirements will not be discussed separately.

PCB board layers: 8L

PCB board material: FR4-TG170

PCB board thickness: 1mm

Copper thickness: 1Oz

Character: White

Surface treatment: immersion gold

Minimum aperture: 0.2mm

Solder mask type: green oil

Delivery deadline: Samples can be sent out within 12 hours at the fastest, and shipments can be made within 3-5 days

Features: High precision circuit board, inner hole to wire 0.16mm, impedance control required