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	more information >> Material FR-4 Board thickness 62mil Min. Line Width/Spacing 6／6mil Min. Finish Hole's Size 10mil Number of Layers 6Layer Soldermask Color Green Surface Finishing Immersion Gold；Carbon ink on keypad Blind／Buried Vias － Controlled Impedance 50Ω、55 Ω Vias on Pad －   more information >> Material FR-4 Board thickness 62mil Min. Line Width/Spacing 6／6mil Min. Finish Hole's Size 12mil Number of Layers 6Layer Soldermask Color Green Surface Finishing Immersion Ag Blind／Buried Vias － Controlled Impedance 60Ω、100Ω Vias on Pad －   more information >> Material FR-4 Board thickness 62mil Min. Line Width/Spacing 5／5mil Min. Finish Hole's Size 12mil Number of Layers 4Layer Soldermask Color Yellow Surface Finishing Immersion Gold Blind／Buried Vias － Controlled Impedance 50Ω、100Ω Vias on Pad －   more information >> Material FR-4 Board thickness 62mil Min. Line Width/Spacing 5／7mil Min. Finish Hole's Size 12mil Number of Layers 4Layer Soldermask Color Red Surface Finishing HASL(Lead free) with Gold Finger Blind／Buried Vias － Controlled Impedance － Vias on Pad －     more information >> Material FR-4 TG170 Board thickness 31mil Min. Line Width/Spacing 5／5mil Min. Finish Hole's Size 10mil Number of Layers 4Layer Soldermask Color Black Surface Finishing Immersion Gold Blind／Buried Vias － Controlled Impedance 50Ω Vias on Pad －   more information >> Material FR-4 Board thickness 39mil Min. Line Width/Spacing 5／5mil Min. Finish Hole's Size 8mil Number of Layers 6Layer Soldermask Color White Surface Finishing Immersion Gold Blind／Buried Vias － Controlled Impedance 50Ω Vias on Pad －           Top
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