VR2R-0350_r1

VR2R-0350

① SA Source

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

Context Before

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

Evidence

Currently, debate around the CCL spec is around the adoption of Quartz cloth (Q glass).

Context After

Quartz cloth is the next generation material that replaces the glass fiber cloth materials as the reinforcing layer, pushing dielectric constant even lower. Besides lower dielectric constant, quartz cloth also has the benefits of being stronger, more temperature resistance, and having a lower CTE. On the other hand, the cost is multiples higher than that of the highest-grade glass fiber cloth and is much harder to process at the PCB manufacturing level, leading to worse yield.

② Atomic Claim

目前 CCL spec 的主要爭議在於是否採用 Quartz cloth（Q glass）。

• Epistemic Mode: ASSERTED
• Mapping Status: PARTIAL

③ Semantic Frame

{
  "attribute": "QUARTZ_CLOTH_ADOPTION_DEBATE",
  "context_nodes": [],
  "entity": {
    "id": "04_knowledge_base/Copper-clad laminate",
    "label": "CCL"
  },
  "frame_type": "ATTRIBUTE",
  "qualifiers": {
    "condition_text": "quartz cloth is plain text in this source claim",
    "numeric_mentions": [],
    "temporal_mentions": [
      "currently"
    ]
  },
  "value": {
    "numeric_mentions": [],
    "value_text": "current CCL-spec debate centers on adoption of quartz cloth (Q glass)."
  }
}

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。