VR2R-0339_r1

VR2R-0339

① SA Source

• Source: 開啟完整 SA 文章
• Section: PCB Materials Upgrade and Area Growth
• Line hint: 298

Context Before

The classification of CCL materials is determined by its dielectric constant (Dk) and dissipation factor (Df) at a given frequency. Insertion loss is lower at lower Dk and Df value. The common classification is anchored to the Megtron series from Panasonic as they have been setting the industry standard. When people describe the CCL as M7 classification it usually means it matches the same Dk and Df specifications as Megtron 7 of Panasonic.

Evidence

Copper foil content in Rubin is upgraded from HVLP2 to HVLP4 grade copper foil for the signal layers.

Context After

As discussed earlier, due to the skin effect, smoother copper foil equals to lower insertion loss. HVLP is the classification of copper foil standing for Ultra-Low Profile Copper Foil. The higher the HVLP grade equals to lower surface roughness.

② Atomic Claim

Rubin 的 signal layers 將 copper foil 從 HVLP2 升級到 HVLP4 grade。

• Epistemic Mode: ASSERTED
• Mapping Status: COMPLETE

③ Semantic Frame

{
  "attribute": "SIGNAL_LAYER_COPPER_FOIL_GRADE",
  "context_nodes": [],
  "entity": {
    "id": "04_knowledge_base/Vera Rubin",
    "label": "Rubin"
  },
  "frame_type": "ATTRIBUTE",
  "qualifiers": {
    "condition_text": null,
    "numeric_mentions": [
      "HVLP2",
      "HVLP4"
    ],
    "temporal_mentions": []
  },
  "value": {
    "numeric_mentions": [
      "HVLP2",
      "HVLP4"
    ],
    "value_text": "signal-layer copper foil upgrades from HVLP2 to HVLP4."
  }
}

④ Canonical Entity Mapping

Role	Surface Label	Canonical Target
entity	Rubin	04_knowledge_base/Vera Rubin

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。