| Item | Process capability | Process detail |
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| Layer | 1-20 layers | Layers means the noted layers on the file. We can make 1-20layers PCB. |
| Materials | FR-4, MCPCB, copper PCB、ROGERS、ARLON、Teflon、Composite PCB | CTT can produce pcb boards of different materials for different use. |
| Maximum size | 500mm*600mm | Ultra long plate above 600mm, the width should no larger than 300mm |
| Shape dimensional accuracy | ±0.2mm | CNC contour tolerance ±0.2mm ， V-cut board contour tolerance ±0.5mm |
| Thickness range | 0.1--5mm | CTT can produce with 1-5mm thickness. |
| Thickness tolerance(t≥1.0mm) | ± 10% | Production process (copper deposition, welding resistance, pad plating) will increase the plate thickness, normally in accordance with positive tolerance. |
| Thickness tolerance( t<1.0mm) | ±0.1mm | Production process (copper deposition, welding resistance, pad plating) will increase the plate thickness, normally in accordance with positive tolerance. |
| Minimum linewidth/gap | 0.075/0.065mm(3mil/2.8mil) | CTT could produce pcb with minium 3mil/2.8 mil linewidth/ gap. |
| Finished PCB outer copper thickness | 35um/70um/105um(1OZ/2OZ/3OZ) | The thickness of copper foil on a finished circuit board, 1 OZ＝35um，2 OZ=70um， 3OZ=105um |
| Finished PCB inner copper thickness | 17-343um(10oz) | Customized copper thickness |
| Minimum aperture | 0.15mm(6mil) | 0.15mm is the minimum aperture of drilling, 6.3mm is the maximum aperture of drilling, if larger than the 6.3mm plant to be dealt with separately. |
| Surface treatment | Tin spray, ENIG, Immerse Au, immersion silver, immersion tin, osp, gold osp, electrospray tin | According to customized requirements |
| Aperture tolerance(machine drill) | ±0.08mm | The tolerance of drilling is ±0.08mm. For example, if the hole is designed as 0.6mm, the finished aperture of the physical plate is acceptable at 0.52--0.68mm. |
| Solder | Photosensitive ink | Photosensitive ink is now the most used type, thermal solid oil is generally used in low-grade single-sided paperboard |
| Minimum width of the character | ≥0.15mm | The minimum width of a character, if less than 0.15 mm, the physical panel may cause character ambiguity due to design reasons |
| Minimum character height | ≥0.8mm | The minimum height of a character, if less than 0.8 mm, the physical panel may cause character ambiguity due to design reasons |
| Character aspect ratio | 1:05 | The most suitable ratio of width to height is more favorable for production |
| Spacing between lines and shapes | ≥0.3mm (12mil) | For routing PCB, the distance from the line layer to the shape line of the board is not less than 0.3 mm, and the distance from the line to the center line of v cutting is not less than 0.4mm. |
| Panelization: clearance gap | 0 clearance | Panelization, no gap between pcb's |
| Panelization: with clearance | 1.6mm | The gap should not be less than 1.6mm with clearance, otherwise it will be more difficult to cut the edge. |
| Pads factory copper spreading method | Hatch copper coating |
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| Pads software slot drawing | Use Drill Drawing layer | If there are more non-metallized grooves on the board, please draw on the drill drawing layer |
| Protel/dxp software window layer | Solder layer | Do not put on paste layer |
| Protel/dxp contour layer | Use Keepout Layer or mechanical layer | Please note: only one contour layer is allowed to exist in a file, and no two contour layers are allowed to exist at the same time. Please delete the unused contour layer, that is, the keepout layer or the mechanical layer can only be chosen when drawing the shape |
| Half hole process minimum half hole aperture | 0.6mm | Half-hole process is a special process with a minimum aperture of not less than 0.6mm |
| solder bridge | 0.1mm |
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| protel/dxp file | gerberfile file | Processing is based on exported gerber files |
| Minimum pad | 0.2mm(8mil) |
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| Impedance control | +/-10% |
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| Contour machining accuracy | +/-0.10mm(4mil) |
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