No, this verification does not impact the agreed lead time. We synchronize the BOM and PCB pad compatibility check with our material procurement process. By completing this at the front-end of the production workflow, we ensure that any potential mismatches are resolved before the assembly phase begins, actually streamlining the overall schedule.

To prevent assembly errors, our engineers perform a thorough BOM-to-Footprint cross-check immediately upon receiving your Gerber files and BOM. We use a proprietary verification program developed in-house to visualize and confirm that every component's physical dimensions perfectly match its corresponding PCB pad. This procedure is standard for all first-time orders or whenever project uncertainties are identified.

The pricing for our conformal coating service is transparent and primarily consists of two parts: the one-time fixture fee and the unit processing fee. Below is a detailed breakdown of how these costs are determined:

●1. Fixture (Jig) Charge: A One-Time Investment

To ensure precision and protect non-coating areas (such as connectors or test points), specialized fixtures are required.

○Unit Price: Approximately 220 – 300 CNY per fixture.

○Quantity Requirement: Our automated coating line is integrated with a long-track infrared curing (baking) oven. To maintain a continuous workflow and maximize production efficiency, we typically require 12 to 15 fixtures to keep the line at full capacity. This prevents "empty gaps" on the conveyor and ensures a uniform finish.

○Reusability: This is a one-time charge. As long as your PCB design remains the same, these fixtures will be stored and reused for all your future re-orders at no additional cost.

●2. Unit Processing Fee

This covers the material cost of the coating and the labor/machine time for application. This fee is charged per piece (PCS).

Note: For long-term partners, we occasionally offer discounts or labor-fee waivers for the manual portions of this process as a gesture of our commitment to your project.

Summary Formula:

Total Coating Cost = [Quantity of Fixtures (12-15 sets) × Unit Price] + [Order Quantity × Unit Processing Fee]

Why do we recommend a full set of fixtures?

Using a complete set of 12-15 fixtures allows the machines to operate at peak efficiency. It guarantees that the boards move seamlessly from the coating station into the drying oven without interruption, which is critical for achieving a professional, high-quality aesthetic and reliable protection for your electronics.

Our PCBA quotation is transparent and consists of five main components. The total project cost is calculated using the following formula:

Total Amount = [Quantity × (Component Cost + PCB Cost + Assembly Cost)] + Stencil Fee + SMT Opening Fee

To help you better understand our pricing, here are the detailed policies regarding SMT Opening and tooling fees:

●SMT Opening Fee Calculation:

The fee is based on the variety of components in your design. The standard rate is 40 CNY per unique component category (BOM line item), with a minimum charge of 1,000 CNY per production run.

(e.g., If your design has 40 types of components, the calculated fee is 40 × 40 = 1,600 CNY.)

●Fee Waiver Policy (For Large Quantities):

We offer Opening fee waivers to support volume production. If the total assembly cost exceeds twice the calculated SMT Opening fee, the Opening fee will be waived.

(e.g., If the Opening fee is 1,600 CNY but the assembly labor cost exceeds 3,200 CNY, the Opening fee will be relieved.)

Note: This applies to approximately 80% of cases; complex projects may require specific analysis, for which we will provide a clear explanation.

●One-time vs. Recurring Fees:

○Stencil Fee: This is a one-time charge. As long as the PCB design remains unchanged, you will not be charged for the stencil on re-orders.

○SMT Opening Fee: This fee is charged per production run, as it covers the mandatory machine calibration, feeder loading, and programming required for each new batch.

○Each bag or tray must be clearly marked with the Part Number and Reference Designators.

○Moisture-sensitive (MSL) or Static-sensitive (ESD) components must be packaged in compliance with their specific storage requirements to avoid damage.

○SMT components must be sealed or taped firmly; loose parts can cause production delays or component damage.