Contents
- Highlights
- Prototype PCB Quoting Checklist: Definition and Scope
- Prototype PCB Quoting Checklist Rules and Specifications
- Prototype PCB Quoting Checklist Implementation Steps
- Prototype PCB Quoting Checklist Troubleshooting
- 6 Essential Rules for Prototype PCB Quoting Checklist (Cheat Sheet)
- FAQ
- Request a Quote / DFM Review for Prototype PCB Quoting Checklist
- Conclusion
A prototype PCB quoting checklist is the critical bridge between your CAD design and the manufacturing floor. It is a systematic validation set used by engineers and procurement teams to ensure all design files (Gerbers, BOMs, Drill files) and fabrication specifications (Stackup, Material, Finish) are complete, accurate, and manufacturable before submitting them to a factory. A robust checklist prevents the dreaded "Engineering Query" (EQ) hold, ensures accurate pricing, and guarantees that the boards delivered match your design intent.
Quick Answer
To get an accurate quote and rapid fabrication start, your submission package must be complete. Here are the essential checkpoints:
- File Format Rule: Always submit Gerber RS-274X or ODB++ files. Ensure all layers (copper, solder mask, silkscreen, drill, and board outline) are included.
- Drill File Pitfall: A common error is missing the NC Drill file or failing to distinguish between plated (PTH) and non-plated (NPTH) holes.
- Material Specification: Clearly define the material type (e.g., FR4 TG150) and board thickness (e.g., 1.6mm). "Standard" can be interpreted differently by different factories.
- Stackup Verification: If impedance control is required, provide a specific stackup table or request the manufacturer's standard stackup for your layer count.
- Quantity & Lead Time: Explicitly state the quantity (e.g., 5, 10, 50 pcs) and desired turnaround time (e.g., 24h, 3-day, standard).
- Surface Finish: Specify the finish (HASL, ENIG, OSP) in the README or quote form, as this significantly affects cost and shelf life.
- Verification Method: Before zipping your files, use a Gerber Viewer to visually confirm the board outline and layer alignment.
Highlights
- Reduces EQ Delays: A complete checklist eliminates back-and-forth emails, potentially saving 2-3 days of pre-production time.
- Cost Accuracy: Specifying tolerances and materials upfront prevents surprise upcharges later in the process.
- Manufacturability: Catching DFM issues (like trace width vs. copper weight) during the quoting phase ensures the design is viable.
- Sourcing Speed: For turnkey orders, a formatted BOM with manufacturer part numbers (MPN) allows for instant component availability checks.
Prototype PCB Quoting Checklist: Definition and Scope
The scope of a prototype PCB quoting checklist extends beyond just the file list. It encompasses the technical "handshake" between the designer and the CAM engineer. When you submit a quote, you are essentially defining the contract of manufacturing. If the data is ambiguous, the factory must guess or stop to ask—both of which introduce risk.
At APTPCB, we see thousands of quote requests. The ones that move to production fastest are those where the "Readme" file or quote form aligns perfectly with the Gerber data. Discrepancies (e.g., the Gerber says 1oz copper, but the note says 2oz) are the number one cause of delays.
Tech / Decision Matrix
The following matrix illustrates how specific decisions in your checklist impact the practical outcome of your quote and manufacturing process.
Tech / Decision Lever → Practical Impact
| Decision Lever / Spec | Practical Impact (Yield/Cost/Reliability) |
|---|---|
| Material Selection (FR4 vs. Rogers) | High-frequency materials (Rogers) increase material cost by 3-10x but are essential for RF signal integrity. Standard FR4 is cost-effective for general logic. |
| Via Technology (HDI vs. Through-Hole) | Adding blind/buried vias increases lamination cycles, raising cost and lead time significantly. Through-hole is the standard baseline. |
| Surface Finish (HASL vs. ENIG) | ENIG provides a flat surface for fine-pitch BGAs but costs more. HASL is cheaper but uneven, unsuitable for fine-pitch components. |
| Turnaround Time (24h vs. Standard) | [Quick Turn services](/pcb/quick-turn-pcb) incur expediting fees (often +50-100%) but are crucial for tight R&D deadlines. |
Prototype PCB Quoting Checklist Rules and Specifications
To ensure your quote is processed immediately, adhere to these specific rules. This table breaks down the critical data points required by CAM engineers.
| Rule | Recommended Value | Why it matters | How to verify |
|---|---|---|---|
| File Format | Gerber RS-274X or ODB++ | Industry standard; prevents scaling and aperture errors common in older formats. | Open files in a 3rd party viewer; check for "Undefined Apertures". |
| Board Outline | Mechanical Layer (GM1) | Defines the exact routing path. Without it, we cannot panelize or quote material usage. | Ensure the outline is a closed, continuous line (0 width or 10mil). |
| Drill Chart | Embedded or Separate File | Specifies hole sizes, tolerances, and plating status (PTH/NPTH). | Check that the drill count matches your CAD software report. |
| Copper Weight | 1oz (35µm) Outer / 0.5oz Inner | Affects trace width calculations for impedance and current capacity. | Specify in the "Readme" text file included in the zip. |
| Solder Mask | Green (Standard) | Non-standard colors (Matte Black, Purple) may add 1-2 days to lead time. | Confirm color choice in the quote form. |
| Silkscreen | White; Min text height 30mil | Legibility. Text smaller than 30mil (0.76mm) often becomes unreadable. | Visual check: Is text overlapping pads? |
For complex designs involving controlled impedance, it is highly recommended to consult our PCB Stackup guide to select a standard construction that meets your requirements without custom material ordering delays.
Prototype PCB Quoting Checklist Implementation Steps
Implementing a rigorous checklist process is not just about checking boxes; it's about preparing a data package that flows seamlessly through the factory.
Implementation Process
Step-by-step execution guide for a perfect quote package
Generate your Gerber files (RS-274X), NC Drill files, and IPC-356 Netlist. Organize them into a single folder. Include a "README.txt" detailing layer stackup, finish, and special requirements.
Run a Design for Manufacturing (DFM) check within your CAD tool or using our [DFM Guidelines](/resources/dfm-guidelines). Verify minimum trace/space (e.g., 4/4mil) and annular rings meet the manufacturer's capabilities.
Clearly define non-Gerber specs: Quantity, Material (TG rating), Copper Weight, Surface Finish, and Color. If assembly is needed, ensure the BOM includes Manufacturer Part Numbers (MPN).
Upload the ZIP file to the [Quote Portal](/quote). Monitor your email for the EQ (Engineering Query) report. Rapid response to EQs is the key to maintaining your lead time.
Prototype PCB Quoting Checklist Troubleshooting
Even with a checklist, issues can arise. Here are common failure modes during the quoting phase and how to fix them.
1. Missing Board Outline
Symptom: The manufacturer puts the quote on hold asking for dimensions. Fix: Ensure the "Keep-Out" or "Mechanical 1" layer contains a continuous, closed polyline defining the board edge. Do not rely on the copper pour to define the edge.
2. Ambiguous Plating Specs
Symptom: The quote assumes all holes are plated, increasing cost, or non-plated holes are plated shut. Fix: Provide separate drill files for PTH (Plated Through Hole) and NPTH (Non-Plated Through Hole), or ensure your drill chart explicitly labels them.
3. Impossible Tolerances
Symptom: The quote is rejected as "No Bid" or requires a custom quote. Fix: Avoid specifying tolerances tighter than standard (e.g., +/- 3mil on routing) unless absolutely necessary. Standard routing tolerance is typically +/- 0.2mm (+/- 8mil).
4. Conflicting Information
Symptom: The Gerber file implies one thing (e.g., square pads for fiducials), but the Readme says another. Fix: The Gerber data is the master. Ensure your notes match the physical design files. If you change the design, update the Readme.
6 Essential Rules for Prototype PCB Quoting Checklist (Cheat Sheet)
| Rule / Guideline | Why It Matters (Physics/Cost) | Target Value / Action |
|---|---|---|
| Complete Layer Set | Missing layers prevent CAM processing. | Include Outline & Drill |
| Trace/Space Width | Going below standard capabilities increases cost/risk. | ≥ 4mil / 0.1mm |
| Min Mechanical Drill | Smaller drills break easily; laser drilling is expensive. | ≥ 0.2mm (8mil) |
| Annular Ring | Ensures the drill hits the pad (registration tolerance). | ≥ 4mil (0.1mm) |
| Solder Mask Expansion | Prevents mask from covering the pad. | 2-3mil (0.05-0.075mm) |
| Clear Material Spec | Prevents using wrong Tg or dielectric constant. | Specify TG150 or TG170 |
FAQ
Q: What files are absolutely required for a PCB quote?
A: At a minimum, we need Gerber files (RS-274X) for all copper layers, solder mask, silkscreen, and board outline, plus an NC Drill file. A "Readme" text file with specs (thickness, finish, copper weight) is highly recommended.
Q: How does layer count affect the prototype price?
A: Price increases with layer count due to the complexity of lamination and plating. A 4-layer board is typically 2x the cost of a 2-layer board. Jumping to 6 or 8 layers adds further cost, especially if blind/buried vias are used.
Q: What is the standard lead time for prototypes?
A: Standard lead time for 2-layer prototypes is often 2-3 days. For 4-6 layers, it is typically 4-5 days. Quick turn options (24h or 48h) are available for an expedited fee.
Q: Do I need to panelize my design before quoting?
A: No. It is usually better to send the single unit design and let the manufacturer handle panelization (V-score or tab-route) based on their production panel sizes. Just specify "Panelize as X by Y" in your notes if you need it for assembly.
Q: What is NRE cost?
A: NRE (Non-Recurring Engineering) covers the setup costs (CAM tooling, E-test fixtures, stencils). For prototypes, this is a one-time fee. If you reorder the exact same revision, you typically do not pay NRE again. ---
Request a Quote / DFM Review for Prototype PCB Quoting Checklist
Ready to move from design to fabrication? Ensure your data package is ready using the checklist above, then send it to our engineering team.
Checklist for Submission:
- Zipped Gerber Files (RS-274X)
- NC Drill File (Excellon)
- Readme / Spec Sheet (Material, Finish, Thickness)
- BOM (if Assembly is required)
- Pick & Place File (if Assembly is required)
Submit Your Files for Instant Quote
Conclusion
A well-structured prototype pcb quoting checklist is the secret weapon of efficient hardware teams. It transforms a chaotic submission process into a streamlined workflow, ensuring that the boards you receive are the boards you designed—delivered on time and within budget. By validating your files, clarifying your specs, and understanding the manufacturing levers, you eliminate the friction that typically slows down R&D.
Signed, The Engineering Team at APTPCB