VR2R-0347_r1

VR2R-0347

① SA Source

• Source: 開啟完整 SA 文章
• Section: PCB Materials Upgrade and Area Growth
• Line hint: 302

Context Before

For the power layers, the additional layers in Strata compared to Blackwell are mostly power layers to accommodate more power going into the GPU. By adding more dedicated power layers, cross talk is reduced as power layers and signal layers are separated. Power layer copper foils are much thicker to insulate the current travelling through it.

Evidence

The glass fiber cloth upgrade aims to reduce the dielectric constant of CCL.

Context After

Beside glass fiber cloth, resin is also a key factor contributing to dielectric constant. To achieve a desirable dielectric constant, the CCL makers have their unique recipes to their formulation of the two dielectric materials in the CCL. Currently, debate around the CCL spec is around the adoption of Quartz cloth (Q glass).

② Atomic Claim

Glass fiber cloth upgrade 的目標是降低 CCL 的 dielectric constant。

• Epistemic Mode: ASSERTED
• Mapping Status: PARTIAL

③ Semantic Frame

{
  "attribute": "GLASS_FIBER_CLOTH_UPGRADE_OBJECTIVE",
  "context_nodes": [],
  "entity": {
    "id": "04_knowledge_base/Copper-clad laminate",
    "label": "CCL"
  },
  "frame_type": "ATTRIBUTE",
  "qualifiers": {
    "condition_text": "glass fiber cloth is plain text in source claim",
    "numeric_mentions": [],
    "temporal_mentions": []
  },
  "value": {
    "numeric_mentions": [],
    "value_text": "glass fiber cloth upgrade aims to reduce CCL dielectric constant."
  }
}

④ Canonical Entity Mapping

Role	Surface Label	Canonical Target
entity	CCL	04_knowledge_base/Copper-clad laminate

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。