https://jlcpcb.com/capabilities/pcb-capabilities ### PCB Specifications | Parameter | Value | | ------------------------ | ---------------------------------------------- | | Max Copper Layers | 32 | | FR-4 Dielectric Constant | 4.5 | | Maximum Dimensions (FR4) | 670 x 600 mm | | Minimum Dimensions | 10 x 10 mm | | Dimension Tolerance | +/-0.1mm | | FR4 Thickness | 0.4 - 4.5 mm | | Thickness Tolerance | +/-10% | | Outer Copper Layer | 1oz = 35um | | Inner Copper Layer | 0.5oz = 17.5um | | Soldermask | Green, Purple, Red, Yellow, Blue, White, Black | | Surface Finish | HASL, ENIG | | | | | | | | | | ### Drilling | Parameter | Value | | --------------------------------- | ------------------------------------------- | | Drill Diameter | 0.15 - 0.63 mm | | Plated Hole Size Tolerance | +0.13mm/-0.08mm | | Non-Plated Hole Size Tolerance | +/-0.2mm | | Average Hole Plating Thickness | 18 um | | Blind/Buried Vias | No | | Minimum Via Inner Hole Size | 0.15mm | | Minimum Via Outer Diameter | 0.25mm | | Minimum NPTH Size | 0.50mm <br>Mech or Keepout Layer | | Minimum Plated Slot Size | 0.5mm wide | | Minimum Non-Plated Slot Size | 1.0mm wide | | Via Hole-to-Hole Spacing | 0.2mm | | Pad Hole-to-Hole Spacing | 0.45mm | | Minimum Castellated Hole Diameter | 0.6mm | | Castellated Hole to Board Edge | 1mm | | Castellated Hole to Hole | 0.6mm | | Copper-Plated Edges | ENIG only<br>At least 3x3mm breaks required | | Rectangular Holes/Slots | No. Rounded only. | ### Traces | Parameter | Value | | ----------------------------------------------- | ------------------------------------------------- | | Minimum Track Width and Spacing (1oz) | 0.10mm / 4mil | | Minimum Track Width and Spacing (2oz) | 0.16mm / 6.5mil | | BGA Fanout | 3mil | | Track width tolerance | +/-20% | | PTH Annular Ring | 0.20mm | | NPTH Pad Annular Ring | 0.45mm | | BGA Pad Diameter | 0.25mm | | BGA Pad-to-Trace Clearance | 0.1mm | | Vias within BGA Pads | OK | | Trace Coil Width & Clearance | Solder Mask: 0.15mm/0.15mm<br>ENIG: 0.25mm/0.25mm | | Hatched Grid Width & Spacing | 0.25mm | | Same-net track spacing | 0.25mm | | Internal Layer Via-to-Copper Clearance | 0.2mm | | Internal Layer PTH Pad Hole-to-Copper Clearance | 0.3mm | | Pad-to-Track Clearance | 0.1mm (Stay well above)<br>0.09mm min for BGA | | SMD Pad-to-Pad | 0.15mm | | Via Hole-to-Track | 0.2mm | | PTH-to-Track | 0.35mm | | NPTH-to-Track | 0.2mm | ### Suggested Minimum SMD Spacing ![[file-lodX5gWfR6.png]] ### Soldermask | Parameter | Value | | --------------------------------------------------- | ------------------------------------------------------------------------- | | Soldermask Expansion | 0.038mm | | Soldermask Expansion Clearance | 0.05mm | | Soldermask Bridge - Min. Pad Spacing (2-layer, 1oz) | 0.20mm for R,G,B,Y, P<br>0.23mm for B,W | | Plugged Vias | 1. No Soldermask Openings<br>2. 0.35mm Clearance<br>3. Max Diameter 0.5mm | | JLCPCB Via-in-Pad Process | Epoxy Filled or Copper Paste Filled | | Soldermask Dielectric Constant | 3.8 | | Soldermask Ink Thickness | >10 um | ### Via Covering Methodologies ![[Pasted image 20241218164626.png]] *Tented is the general way* ### Legend | Parameter | Value | | --------------------------------------------- | -------------- | | Minimum Line Width | 0.153mm / 6mil | | Minimum Text Height | 1.0mm / 40 mil | | Character width-to-height ratio | Prefer 1.6 | | Hollow-Carved Character width-to-height ratio | Prefer 1.6 | | Pad-to-Silkscreen Spacing | 0.15mm | ### Outline | Parameter | Value | | ------------------------------------- | --------------------------------------------------------- | | Routed: Copper-Edge Clearance | 0.2mm | | Routed: Edge Dimension Tolerance | 0.2mm | | V-Cut: Copper-Edge Clearance | 0.4mm | | V-Cut: Edge Dimension Tolerance | 0.4mm | | V-Cut: Minimum Panel Dimensions | 70 x 70 mm | | V-Cut: Maximum Panel Dimensions | 475 x 475 mm | | V-Cut: Groove Angle | 25 deg | | Mouse Bites: Copper-Edge Clearance | 0.2mm | | Mouse Bites: Edge Dimension Tolerance | 0.2mm | | Mouse Bites: Panel Board Spacing | 1.6mm or 2.0mm | | Mouse Bite: Diameter | 0.5-0.8mm | | Mouse Bite: Distance between bites | 0.2-0.3mm | | Mouse Bites: Breakaway Tab Width | 4mm | | Panelization Spacing | 2mm between boards | | Panel of Circular PCBs | 20x20mm<br>Panelize with stamp holes. Add Tooling Strips. | ### Mouse Bites ![[MouseBitesPanel.0e68ad5.png]] hello ceres! hope you’re having a great day! when are we going to make robots together? ### Final KiCAD Constraints Entry ![[Pasted image 20241218173350.png]]