Overview

Overview of Design Parameters available to constrain and specify Quilter-generated layouts.

Design Parameters are key design considerations that determine the options available to Quilter when generating layout candidates. These parameters cover everything from high-level questions, such as who will manufacture your board, to low-level details, like where to place a capacitor.

Once your board's Design Parameters are fully defined, your layout candidate is complete. Your input file is the main way to tell Quilter which Design Parameters (design elements) are fixed and which remain flexible for Quilter to explore.

We typically categorize Design Parameters into three main groups:

1. Fabrication parameters – who will manufacture your board, and what fabrication capabilities and materials do they have?

2. Placement parameters – where do components go on your design?

3. Routing parameters – how should components be connected?

As mentioned in our introduction, Design Parameters can be either requirements that Quilter must follow or preferences that act as filters on the solution space Quilter explores.

Check out the tables below to learn how to control Quilter's options and key parameters of the candidates it generates.

Fabrication

Parameter	Description	Preference	Requirement
Fabricators	The PCB manufacturer that a specific layout candidate (stack-up and fabrication ruleset) is designed for.	✅ Filter by fabricator	✅ Enteprise customers only
Stack-ups	The stack-up that Quilter uses when generating your candidate, including layer count, copper weight, material properties, and more.	✅ Layer count only	🔄 Custom stack-ups coming soon
Fabrication rules	Basic design rules that ensure your board can be manufactured without issue – trace, space, drill, via, edge clearances, etc	✅ Trace and space	🔄 Custom fab rules coming soon

Placement

Parameter	Description	Preference	Requirement
Pre-placed components	Lock the location of location-sensitive components so Quilter can't modify it.	⬇️ Use "placement regions"	✅ Place within board outline in input file
Placement regions	Constrict Quilter's placement of unplaced components to a designated area within your board outline.	❌ Placement regions are always respected	✅ Add to input board file
Single-sided placement	Limit placement to one side of the PCB.	✅ Filter for single-sided designs.	⬆️ Use "placement regions"

Routing

Parameter	Description	Preference	Requirement
Pre-routed traces	Lock the routing path of sensitive signals.	❌ Pre-routed traces are always preserved	✅ Leave within board outline in input file
Preserved pours	Preserve existing copper pours from your input pile for Quilter to use when generating candidates.	❌ Preserved pours are always respected	✅ "Lock" pours you want to preserve in input ful
Keepouts	Prevent Quilter from routing traces through specific geometric areas within your design.	❌ Keepouts are always respected	✅ Add keepout to your input file
Net Widths	Manually specify net widths for individual nets or net classes in your design.	❌ Net widths are always respected	✅ Specify "Net Width" in during job setup