Linear Composition Gradient Workbook

A User-Developed Plugin

Developed at PDI Berlin


Why It Matters

Most control systems are closed.

If you want something new:

You wait.
You request.
You compromise.

UnicornOne was designed differently.

A protected, stable core.
User-extensible logic.

This plugin demonstrates what that makes possible.


The Objective

Create a virtually linear composition gradient across 500 nm.

Not stepwise.
Not approximate.
Truly linear.

With:

  • Correct temperature ramping
  • Correct flux balancing
  • Clean transitions
  • No unintended regime shifts

The Approach

The plugin:

  1. Uses internal Flux tool models
  2. Computes required per-element net flux
  3. Generates a 100-layer stack sequence
  4. Adjusts temperature dynamically to preserve linear incorporation
  5. Compensates for desorption kinetics
  6. Produces a deterministic recipe block

No spreadsheet.
No manual scripting.

Just structured physics inside the control plane.


The Result

The gradient worked.

First run.

Not tuned afterward.
Not iterated five times.
Not corrected post-growth.

First time.

Because it was engineered from structured flux data and calibrated models.


Sovereign Software in Action

This plugin was developed by the user.

Not by the UnicornOne core team.

The core remains:

  • Protected
  • Stable
  • Deterministic

The extensions remain:

  • Domain-specific
  • User-controlled
  • Transferable

This is sovereign software:

A strong foundation.
Extensible intelligence.


The Deeper Lesson

When:

Flux modeling
Temperature calibration
Structured recipes
Metrology feedback

Live inside one architecture—

You can design gradients.

Not hope for them.


Amazing. Instructive. Transferable.

This is not a one-off trick.

It is a demonstration of what becomes possible when:

Users are empowered to extend the system safely.

And when physics is encoded, not approximated.