# Step 19: Thermal

copper and vias at every hot tab against the rise budget; then the AI's own temperature rise drawing and a walkthrough of the pours it judged

## Visits

- 2026-10-18T22:18:00Z
- 2026-10-18T22:39:46Z

## What the binary checked

### analyze-thermal

- **acknowledgedPeaks**: 0 item(s)
- **boardSinkAssumptions**: 0 item(s)
- **boardSinkNotes**: 0 item(s)
- **expiredAcks**: 0 item(s)
- **fieldNote**: same-input field screen passed under its stated assumptions
- **fieldReport**: ./aiflow-run/fields/fields.json
- **heuristicPass**: True
- **pass**: True
- **results**: 2 item(s)

### thermal-vias

- **acked**: L1, U1
- **landed**: 0
- **short**: 0 item(s)

### thermal-vias-plan

- **parts**: 2 item(s)
- **plan**: ./aiflow-run/plan-thermal-vias.json
- **pourFreshness**: 0 item(s)

## Screenshots and drawings

**start**

![start](pub-shot-thermal-1-start.png)

**Layer-by-layer copper lateral heat flux and plated via conduction from U1 (250 mW) and L1 (120 mW) into F.Cu and B.Cu pours**

![Layer-by-layer copper lateral heat flux and plated via conduction from U1 (250 mW) and L1 (120 mW) into F.Cu and B.Cu pours](artifact-7ab9cf7ae4c7fce8fdfdb4f34a506b1e94932cd1d73b5a3181a50bb1290acdaf.png)

**Full-board 3D FR4 and copper temperature rise in still air (+41.6 C peak) and moving air (+21.5 C peak) against the +55.0 C budget**

![Full-board 3D FR4 and copper temperature rise in still air (+41.6 C peak) and moving air (+21.5 C peak) against the +55.0 C budget](artifact-7069db1d811b3af9874844615dbce649b3f83e6c8b0f93ead6962db0f08fb638.png)

**screenshot**

![screenshot](pub-shot-thermal-1-net-VOUT.png)

**screenshot**

![screenshot](pub-shot-thermal-1-net-GND.png)

**end**

![end](pub-shot-thermal-1-end.png)

**start**

![start](pub-shot-thermal-2-start.png)

**screenshot**

![screenshot](pub-shot-thermal-2-net-VOUT.png)

**screenshot**

![screenshot](pub-shot-thermal-2-net-GND.png)

**end**

![end](pub-shot-thermal-2-end.png)

**visit vias-1-end**

![visit vias-1-end](pub-shot-thermal-vias-1-end.png)

**visit vias-1-start**

![visit vias-1-start](pub-shot-thermal-vias-1-start.png)

**visit vias-2-end**

![visit vias-2-end](pub-shot-thermal-vias-2-end.png)

**visit vias-2-start**

![visit vias-2-start](pub-shot-thermal-vias-2-start.png)

## Clips

::adom-video{video="/john/tps54202-12v-5v-buck-20261018/render/docs/clips/pub-window-19530338-20261018-221841-10x.mp4" poster="/john/tps54202-12v-5v-buck-20261018/render/docs/clips/pub-window-19530338-20261018-221841-poster.jpg" title="Thermal, visit 1 (10x)" muted="true"}

::adom-video{video="/john/tps54202-12v-5v-buck-20261018/render/docs/clips/pub-window-19530338-20261018-224000-10x.mp4" poster="/john/tps54202-12v-5v-buck-20261018/render/docs/clips/pub-window-19530338-20261018-224000-poster.jpg" title="Thermal, visit 2 (10x)" muted="true"}

## AI usage (Google Antigravity)

37 model calls: 127,382 fresh input, 4,979,006 cached input and 24,253 output tokens.