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2 - Board Setup

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Table of Contents


2.1 - Layers

2.1.1 - Text & Graphics

The default settings for text and graphics using the metric system are fine:

Line Thickness (mils) Text Width (mils) Text Height Text Thickness (mils)
Silk Layers 0,12 mm (4,724409) 1,0 mm (39,37008) 1,0 mm 0,15 mm (5,905512)
Copper Layers 0,20 mm (7,874016) 1,5 mm (59,05512) 1,5 mm 0,30 mm (11,81102)
Edge Cuts 0,05 mm (1,968504)
Courtyards 0,05 mm (1,968504)
Other Layers 0,15 mm (5,905512) 1,0 mm (39,37008) 1,0 mm 0,15 mm (5,905512)

2.2 - Design Rules

2.2.1 - Net Classes

Here we change the values regarding TRACKS to values using the imperial system.

Clearance Track Width Via Size Via Drill uVia Size uVia Drill dPair Width dPair Gap
10 mils 10 mils 0,8 mm 0,4 mm 0,3 mm 0,1 mm 10 mils 10 mils
(0,254 mm) (0,254 mm) (31,49606 mils) (15,74803 mils) (11,81102 mils) (3,937008 mils) (0,254 mm) (0,254 mm)

2.2.2 - Tracks & Vias

Here we add all new values for the TRACKS using the imperial system.

Width Current (^10 °C / A)
10 mils (0,254 mm) 0,9 A (35 µm)
15 mils (0,381 mm)
20 mils (0,508 mm) 1,4 A (35 µm)
25 mils (0,635 mm)
30 mils (0,762 mm) 1,9 A (35 µm)
40 mils (1,016 mm) 2,4 A (35 µm)

For the VIAS we use the following values while keep using the metric system.

Size Drill Current (^10 °C / A)
0,8 mm (31,49606 mils) 0,4 mm (15,74803 mils) 1,6 A
1,4 mm (55,11811 mils) 0,7 mm (27,55906 mils) 2,4 A
2,0 mm (78,74016 mils) 1,0 mm (39,37008 mils) 3,1 A

2.2.3 - Solder Mask/Paste

Here we also switch to slightly other values using the imperial system.

Size
Solder mask clearance 2 mils (0,0508 mm)
Solder mask minimum width 10 mils (0,254 mm)
Solder paste clearance -0 mils
Solder paste ratio clearance -0,00 %

2.3 - Fill settings

Size (default sizes are fine)
Clearance 20 mils (0,508 mm)
Minimum width 10 mils (0,254 mm)
Thermal clearance 20 mils (0,508 mm)
Thermal spoke width 20 mils (0,508 mm)

2.4 - Design rules for board houses

2.4.1 - PCBWay (Quick-turn PCB as of 21/11/2019)

DRC settings

  • Minimum track width: 6 mils
  • Minimum track gap: 6 mils
  • Minimum via drill: 0,3 mm (11,81102 mils)

Text (silkscreen) settings

  • Positive:
    • Minimum character line width: 0,15 mm
    • Minimum character height: 0,8 mm
    • (A ratio of 1:5 is recommended)
  • Inverted:
    • Minimum character line width: 0,25 mm
    • Minimum character height: 1,25 mm

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