The NC (Numerical Control) Drill file defines hole locations, tool numbers and finished hole sizes (X&Y coordinates). For Prototype(Engineering Level = Limited Review on quote form) PCBs, all holes will be treated like plated through holes. The following two design features could create a difference between the design file and the received PCBs:
For Prototype boards (Engineering Level = Limited Review on the quote form) PCBs: Specified holes < 0.018" will be treated as vias, and drilled approximately the same size as specified. The smallest available bit is 0.0135". If your drill is smaller, it will be increased to this size.
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American Standard Circuits (ASC) and Sunstone Circuits have joined forces to become the ultimate PCB solution provider with over 50 years of combined industry experience. ASC excels in producing Ultra HDI, rigid, metal-backed/core, RF/microwave, flex, and rigid-flex PCBs for diverse industries, while Sunstone Circuits is known for quick-turn, high-quality PCBs and exceptional customer support. This strategic alliance combines ASC's certifications and expertise with Sunstone's commitment to excellence, setting a new standard in PCB manufacturing. Together, we provide full scale solutions for engineers, from design to prototype to large-scale production.