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Home > Quality> PCB Quality Audit FAQs
5. Drilling
Please describe and explain the pcb drilling process and enclose the corresponding process descriptions of circuit board drilling Quality Management Handbook. In addition, samples are needed (reports, datasheets, tables, photos etc.).
5.1 How and in which complexity do you check the holes of circuit board?
How do you control the following parameters before plating: diameter, planarity of the hole-wall, residues in the holes.
Answer:
PTH Desmearing
5.2 How long is the durability of the circuit board drills? How often do you repoint the drills?How is the durability of the drills controlled and documentated?
Answer:
See the Material Prepare instructions
5.3 How often do you micro-section coupons to check circuit board hole wall quality? Which size of drills do you check?
Answer:
Make micron sections of circuit board to checks 0.5mm holes every shift.
5.4 What kind of desmearing process do you use after pcb drilling? How do you assure adequate desmearing?
Answer:
PTH desmearing line; potassium permanganate solution.
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