PCB Manufacturing Company in India: Cerra Systems is a professional PCB Fabrication, PCB Manufacturer, and Printed Circuit Board, Service provider in India. It is the leading PCB Manufacturing Company in India.
PCB Manufacturing Cost Drivers
Layer:
- Layer count is the other main driver with respect to PCB cost
- Assume an 8L PCB as standard
- Every two layers added to the PCB will add ~10-20% to the PCB cost
- Odd layers do not save A 7L PCB costs the same as an 8L PCB due to the process involved in the manufacture
- Internal cores are always supplied to fabricators as double-sided
- Internal layers are always processed as pairs
- When subtracting two layers, PCB costs decrease by ~10-20%
- Core thicknesses and copper weights add to material costs
Basic:
- Basic process complexity
- All process steps have an associated cost in terms of process times, materials, consumables, energy and waste treatment
- The adders described on subsequent slides are to be used as a rough guide only, as each design is unique and needs to be priced accordingly
- Adders are based on 10-panel minimum releases. Prototype runs may be affected by lot charges and expedite charges as described earlier
Drilling:
- Mechanical drilling
- Drilling is the largest variable cost in PCB manufacturing
- Drilling holes consume drill bits at an average rate of one bit for every 1000 holes drilled
- Some fabricators (TTM included) will include a certain amount of drill hits per manufacturing panel in the base cost (often ~25K per panel)
- Additional costs will amount to 1-2% for every 10K holes
- Drill hole size is an adder depending on the region of manufacture
- 15-20% cost adder for 6 mil (0.15mm) holes in NA
- 10% cost adder for 8 mils (0.2mm) holes in Asia
- Once there is one 6 mils or 8 mil hole on a PCB, then having thousands will make no difference to the size adder, but may affect overall yield
Thickness and Aspect Ratio:
• Thickness adders
- Any thickness less than 90 mil (2.29mm) is considered standard in NA (62 mil – 1.58mm in Asia)
– 91-120 mil (2.30-3.05mm) adds 10% (30% Asia)
– 121-180 mil (3.06-4.57mm) adds 20% (50+% Asia)
– 181-250 mil (4.58-6.35mm) adds 30 %
– Design review is required for anything over 250 mil (6.35mm) (equipment limitations) or under 20 mil (0.5mm) (process limits)
- Aspect ratio (thickness ÷ min drill size) adders
- Aspect ratios of <10:1 are considered standard
– 10:1-11.99:1 adds 10% (3-5% Asia)
– 12:1-12.99:1 adds 20% (6-10% Asia)
– 13:1-14.99:1 adds 30% (10-15% Asia)
– Drill size and overall thickness can trigger aspect ratio adders
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