VR2-0318
① SA Source
- Source: 開啟完整 SA 文章
- Section:
PCB vs Flyover Cables - Line hint:
425
Context Before
Source: Doosan, SemiAnalysis
Evidence
The three main mechanisms contributing to insertion loss in a PCB channel are conductor loss from skin effect and copper surface roughness, dielectric loss from laminate absorption, and geometry loss from discontinuities such as vias and layer changes
Context After
Source: DesignCon, Circuit Foil Luxembourg
② Atomic Claim
PCB channel 的三大 insertion loss 機制，分別是 skin effect 與 copper surface roughness 造成的 conductor loss、laminate absorption 造成的 dielectric loss，以及 vias／layer changes 等 discontinuities 造成的 geometry loss。
- Epistemic Mode:
ASSERTED - Mapping Status:
COMPLETE
③ Semantic Frame
{
"attribute": "LAYER_COUNT",
"context_nodes": [
{
"id": "04_knowledge_base/Insertion loss",
"label": "insertion loss"
},
{
"id": "04_knowledge_base/Copper",
"label": "copper"
},
{
"id": "04_knowledge_base/Via",
"label": "vias"
}
],
"entity": {
"id": "04_knowledge_base/PCB",
"label": "PCB"
},
"frame_type": "ATTRIBUTE",
"qualifiers": {
"condition_text": null,
"numeric_mentions": [],
"temporal_mentions": []
},
"value": {
"numeric_mentions": [],
"value_text": "PCB channel 的三大 insertion loss 機制，分別是 skin effect 與 copper surface roughness 造成的 conductor loss、laminate absorption 造成的 dielectric loss，以及 vias／layer changes 等 discontinuities 造成的 geometry loss。"
}
}④ Canonical Entity Mapping
| Role | Surface Label | Canonical Target |
|---|---|---|
| entity | PCB | PCB |
| context_0 | insertion loss | 04_knowledge_base/Insertion loss |
| context_1 | copper | Copper |
| context_2 | vias | Via |
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。