Fiberglass Cloth

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Buyer guide
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Zbcarbon
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Which electronic fiberglass cloth style do I need for PCB laminates: 7628, 2116, 1080 or 106?

Pick the style by the thickness each ply has to add to the board. 7628 is the heavy, thick style, at 210 g/m² and 0.167 mm[1]. 2116 sits in the middle at 104 g/m² and 0.090 mm[2]. 1080 is light at 48 g/m² and 0.045 mm[3], and 106 is the thinnest at 24.5 g/m² and 0.026 mm[4]. All of them are plain-weave E-glass[5].

Electronic-grade fiberglass cloth
Electronic-grade E-glass cloth for copper clad laminates and prepreg.

How do the common styles compare?

Style Yarn (warp/weft) Ends per inch (warp × weft) Weight (g/m²) Thickness (mm) Tensile, kgf/2.5 cm (warp/weft)
7628 ECG751/0 44 × 33 210 0.167 > 40 / > 30
7629 ECG767/0 44 × 31 220 0.180 > 40 / > 30
7627 ECG751/0 44 × 31 202 0.167 > 40 / > 30
7667 ECG767/0 44 × 36 234 0.185 > 40 / > 30
2116 ECE2251/0 60 × 58 104 0.090 > 25 / > 20
2313 ECE2251/0 / ECD4501/0 60 × 64 81 0.07 > 20 / > 10
1080 ECD4501/0 60 × 48 48 0.045 > 11 / > 9
1086 ECD4501/0 60 × 60 52 0.044 > 11 / > 11
106 ECD9001/0 56 × 56 24.5 0.026 > 5 / > 5

All figures are from the Zbcarbon electronic-grade cloth range[6].

When is 7628 the right choice?

Use 7628 where you need to build thickness quickly with few plies, such as the core of standard FR-4 boards. It is the strongest style in the range, with warp tensile above 40 kgf/2.5 cm[1]. 7629, 7627 and 7667 are close relatives with slightly different weight and thread count, so check which one your laminate recipe names before you order[6].

When should I use 2116 or 2313?

2116 is about half the weight of 7628 with a denser 60 × 58 weave[2]. The tighter weave gives a smoother surface and more even resin, which is why it is common on outer layers and in prepregs for multilayer boards. 2313 is lighter again, at 81 g/m²[7].

When do I need 1080, 1086 or 106?

Use the light styles for thin dielectric layers and high-layer-count boards, where each ply has to be as thin as possible. 1080 is 0.045 mm[3] and 1086 is 0.044 mm[8], and 106 is 0.026 mm[4]. They carry much less load, so handle them with care on the treater line.

210 g/m²7628, the heaviest common style
24.5 g/m²106, the lightest style
100 m²Minimum order

What else should be on the purchase order?

  • The style number and the yarn designation (for example ECG751/0).
  • Thread count in ends per inch, warp and weft.
  • Weight in g/m² and nominal thickness in mm.
  • Warp and weft tensile strength, with the test width.
  • Finish (silane coupling agent) to match your resin system.
  • Roll width, roll length and packing.

Electronic-grade cloth is made from high-purity E-glass fibers with uniform weaving for stable electrical performance[9]. The minimum order is 100 m²[10]. For insulation wraps and masking, the same 7628 cloth is also supplied with an acrylic or flame-retardant adhesive, rated from −40 °C to +180 °C[11].

Send the styles and quantities through the quote form, or see the full table on the electronic-grade fiberglass cloth page.

Sources

  1. 7628: Plain, ECG751/0, 44 × 33, 210 g/m², 0.167 mm, > 40 / > 30 kgf/2.5 cm
  2. 2116: Plain, ECE2251/0, 60 × 58, 104 g/m², 0.090 mm, > 25 / > 20 kgf/2.5 cm
  3. 1080: Plain, ECD4501/0, 60 × 48, 48 g/m², 0.045 mm
  4. 106: Plain, ECD9001/0, 56 × 56, 24.5 g/m², 0.026 mm
  5. Weave: Plain (all styles in the range)
  6. Product specification table, electronic-grade fiberglass cloth
  7. 2313: 81 g/m², 0.07 mm
  8. 1086: 52 g/m², 0.044 mm
  9. Feature: High purity E-glass fibers for stable electrical performance; uniform weaving
  10. MOQ: ≥100 Sqm
  11. Adhesive type: acrylic / solvent-based flame retardant; temperature resistance −40 °C to +180 °C

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