Material Specification
Woven fiberglass fabric styles categorized by four-digit numbers define the physical weight and yarn thickness of reinforcement sheets used in rigid laminates. Fabricators use 1017 glass to produce ultra-thin prepreg layers for high-density interconnect boards where dielectric thickness must remain minimal. Mesh structures woven from very fine glass filaments ensure uniform distribution of the epoxy resin during the saturation process.
Laminates built with this fabric achieve consistent electrical insulation while allowing overall board height to remain low. The nominal thickness of a single layer of this fabric is approximately nineteen micrometers, allowing for ultra-thin core configurations.
Ablation Dynamic
Laser drilling through laminate materials requires uniform substrate density to prevent beam distortion and uneven hole shapes. In laminates utilizing 1017 glass, the fine yarn structure minimizes density variation. Standard laser pulses vaporize the material uniformly, preventing protruding fibers in microvia walls.
Structural Integrity
Dimensional stability represents a trade-off when using thin fabric styles in multi-layer board constructions. Because 1017 glass has low structural mass, boards using it are susceptible to warpage during lead-free reflow cycles. Balanced copper distribution and symmetrical layer stacking help mitigate this movement.
The thin weave also reduces the overall puncture resistance of the core during mechanical drilling operations, meaning drill feed rates must be optimized to prevent exit burrs.
