VR2R-0303
① SA Source
- Source: 開啟完整 SA 文章
- Section:
PCB vs Flyover Cables - Line hint:
274
Context Before
Conductor loss is driven by copper surface roughness.
Evidence
As signals travel down the copper traces in the PCB, energy is lost due to the resistance in copper.
Context After
At higher frequencies, the signal traveling through the copper crowds toward the surface of the trace, which is known as the skin effect. On top of the natural resistance of copper, if the surface is rough, the current will not travel along a uniform path incurring more resistance and loss.
② Atomic Claim
Signal 沿 PCB 的 copper traces 傳輸時，會因 copper 的電阻而損失能量。
- Epistemic Mode:
ASSERTED - Mapping Status:
PARTIAL
③ Semantic Frame
{
"attribute": "COPPER_TRACE_RESISTIVE_LOSS",
"context_nodes": [],
"entity": {
"id": "04_knowledge_base/PCB",
"label": "PCB"
},
"frame_type": "ATTRIBUTE",
"qualifiers": {
"condition_text": null,
"numeric_mentions": [],
"temporal_mentions": []
},
"value": {
"numeric_mentions": [],
"value_text": "signals lose energy because of copper resistance while traveling along PCB copper traces."
}
}④ Canonical Entity Mapping
| Role | Surface Label | Canonical Target |
|---|---|---|
| entity | PCB | PCB |
⑤ Human Review
請在 Properties 逐項確認：
- 原文 → Atomic Claim 是否忠實
- Atomic Claim → Semantic Frame 是否忠實
- Canonical Entity mapping 是否正確
- Epistemic mode 是否保留原文語氣
- 最後選擇
review_action
Review state
Markdown 內文不是正式 approval。只有 Apply bridge 寫入的 Decision Ledger event 才是正式決策。