VR2R-0343
① SA Source
- Source: 開啟完整 SA 文章
- Section:
PCB Materials Upgrade and Area Growth - Line hint:
467
Context Before
Source: Panasonic
Copper foil content in Rubin is upgraded from HVLP2 to HVLP4 grade copper foil for the signal layers. 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.
Evidence
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.
Context After
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. Currently, debate around the CCL spec is around the adoption of Quartz cloth (Q glass).
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
在 power layers 方面，Strata 相較 Blackwell 增加的 layers 多數是 power layers，用來承載更多送入 GPU 的 power。
- Epistemic Mode:
ASSERTED - Mapping Status:
PARTIAL
③ Semantic Frame
{
"frame_type": "NARY_RELATION",
"participants": [
{
"node": {
"id": "04_knowledge_base/Blackwell",
"label": "Blackwell"
},
"role": "reference_generation"
},
{
"node": {
"id": "04_knowledge_base/GPU",
"label": "GPU"
},
"role": "power_recipient"
}
],
"qualifiers": {
"condition_text": "Strata is plain text in this source claim; added layers are mostly power layers",
"numeric_mentions": [],
"temporal_mentions": []
},
"relation_type": "ADDITIONAL_STRATA_LAYERS_SUPPORT_GPU_POWER"
}④ Canonical Entity Mapping
⑤ V2 Draft（需要修正時直接編輯）
Inline repair
只編輯以下三個 Draft 區塊。完成後將
review_action設為REQUEST_REPAIR，再手動執行 Repair Preview。
執行腳本前，Draft 不會寫入 Claim Store 或 Graph。
V2 Atomic Claim Draft
在 power layers 方面，Strata 相較 Blackwell 增加的 layers 多數是 power layers，用來承載更多送入 GPU 的 power。
V2 Semantic Frame Draft
{
"frame_type": "NARY_RELATION",
"participants": [
{
"node": {
"id": "04_knowledge_base/Blackwell",
"label": "Blackwell"
},
"role": "reference_generation"
},
{
"node": {
"id": "04_knowledge_base/GPU",
"label": "GPU"
},
"role": "power_recipient"
}
],
"qualifiers": {
"condition_text": "Strata is plain text in this source claim; added layers are mostly power layers",
"numeric_mentions": [],
"temporal_mentions": []
},
"relation_type": "ADDITIONAL_STRATA_LAYERS_SUPPORT_GPU_POWER"
}V2 Revision Metadata Draft
{
"epistemic_mode": "ASSERTED",
"mapping_status": "PARTIAL"
}⑥ 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。