What Information Does a PCBA Manufacturer Need for NPI?

A PCBA new product introduction build is the step between a released design and a repeatable production board. For a manufacturer to quote, kit, assemble, and test the board, the data package must answer three questions: what to buy, where to place it, and how to verify the result. Missing or conflicting answers cause stops on the line.

The following sections list the information used during NPI. Some files are required for every build. Others are conditionally required depending on test methods, component types, or board complexity.

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1. Bill of Materials (BOM)

The BOM is the purchase and kitting record. A usable BOM contains:

• Line number and quantity
• Reference designators for each line
• Manufacturer name and manufacturer part number, or an approved alternate
• Package description such as 0402, SOIC-8, or QFN-24
• Designator notes for DNI or DNP parts
• Supplier part number if the component is sourced through a specific distributor
• Revision and date

Internal part numbers alone are not enough unless the manufacturer has access to the customer’s part library. A BOM that lists only “10k 0402 resistor” creates sourcing ambiguity. 1943 Technology’s PCBA New Product Introduction services treat the BOM as the master list for kitting and compare it against the centroid file before setup.

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2. PCB Fabrication Data

The manufacturer needs the board build file set. This includes:

• Gerber files in RS-274X or Gerber X2 format, or ODB++ / IPC-2581
• Drill file with tool sizes and plated/non-plated distinction
• Fabrication drawing showing dimensions, tolerances, material, board thickness, copper weight, surface finish, solder mask color, silkscreen, and controlled impedance notes
• Layer stackup if impedance or controlled dielectric is required
• Panelization data if the design is already paneled; otherwise the manufacturer can propose a panel

The paste mask layer should be included. Missing paste mask or incorrect apertures can lead to solder defects, especially on fine-pitch and thermal pad parts.

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3. Assembly Data

Assembly data tells the line where to place components. The core file is the centroid or pick-and-place file. It should include:

• Reference designator matching the BOM
• X and Y coordinates in a defined unit and origin
• Rotation in degrees
• Board side, top or bottom
• Package or footprint name

Rotation errors are a common NPI issue. The manufacturer compares the centroid rotation against the assembly drawing and silkscreen pin 1 markers. If the origin convention is not stated, the manufacturer may ask for confirmation rather than guess.

An assembly drawing in PDF is also required. It shows reference designators, polarity, pin 1 orientation, and special placement notes. For double-sided boards, top and bottom views should be clear.

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4. Schematic

A searchable PDF schematic or native design file is not always required for assembly, but it is needed for debug, test, and DFM review. It helps the manufacturer trace nets, confirm no-load parts, and check test point locations. 1943 Technology’s PCBA New Product Introduction services use the schematic during first article review and when a component substitution must be verified against the circuit.

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5. Test and Programming Data

If the board requires electrical test or firmware, the manufacturer needs:

• Test point list or ICT/flying probe requirements
• Functional test procedure with pass/fail limits
• Programming files in binary or hex format and target device list
• Programming method, such as JTAG/SWD, UART bootloader, or in-circuit fixture
• Serial number, MAC address, or label requirements if programming must tie to a unique identifier

Without test requirements, the manufacturer can only verify placement and solder quality, not electrical function. If a functional test fixture is not yet released, the NPI build may be limited to AOI, X-ray, and visual inspection.

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6. Component Source, Packaging, and Handling

The manufacturer needs to know which parts are supplier-provided, customer-consigned, or customer-approved. For components with moisture sensitivity levels, the BOM should include MSL data or the manufacturer will check against the component datasheet. ESD sensitivity and package type also affect handling.

Cut tape versus reels affects setup time. If a BOM lists a component available only in full reel but the build needs ten pieces, the manufacturer may ask for a partial reel or an alternate. Long lead time parts should be flagged during NPI so procurement can start before PCB fabrication finishes.

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7. Process Requirements

If the board has special assembly processes, the manufacturer needs the limits:

• Solder paste alloy and target stencil thickness
• Reflow profile limits or component temperature restrictions
• Selective or wave soldering areas
• Conformal coating, potting, underfill, or bonding requirements
• Cleaning requirements and no-clean versus water wash
• Press-fit connectors or through-hole parts that require selective soldering
• RoHS or REACH constraints on materials

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8. Quality and Inspection Standards

The NPI package should state the acceptance class and inspection method:

• IPC-A-610 class 2 or class 3
• AOI coverage or X-ray for area array packages
• First article inspection requirements
• Documentation requirements for certificates of conformance or material traceability

If the board will be used in a controlled end application, the manufacturer may need to retain records for traceability. This should be stated before the build.

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9. Project and Revision Information

Finally, the manufacturer needs basic project data:

• Quantity and due date
• Revision level of the design
• Whether this is a prototype, pilot, or pre-production run
• Shipping address and labeling requirements
• Engineering change note if the build is a revision change

A single revision should be used across BOM, Gerber, assembly drawing, and centroid. Mixing revisions is a common source of first article failures.

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How 1943 Technology’s PCBA New Product Introduction Services Use This Data

Shenzhen 1943 Technology Co., Ltd. provides PCBA New Product Introduction services that begin with a data package review. The review compares the BOM against the centroid and Gerber data before kitting. If a rotation, polarity, or package mismatch appears, the manufacturer raises a technical query instead of building to an assumed condition. DFM notes are returned before first article assembly so that design issues can be corrected at the data stage, not after boards are soldered.

The goal is to make the first article reflect the design and to create a controlled baseline for the next production run. That requires the information above to be complete and revision-controlled.

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FAQ

What is the minimum data package needed to start a PCBA NPI?

A minimum package includes a BOM with manufacturer part numbers, Gerber or ODB++ files, a centroid/pick-and-place file, an assembly drawing, and test/programming files if the board is tested. A fab drawing and schematic reduce questions during DFM and first article review.

Can a manufacturer start NPI without a complete BOM?

Preliminary DFM and quoting can start with a partial BOM, but kitting and first article assembly need a complete BOM. Missing manufacturer part numbers, reference designators, or approved alternates delay sourcing and can lead to the wrong component being ordered.

How are design changes handled during PCBA NPI?

Design changes should be released as a full revision set: BOM, Gerber, centroid, assembly drawing, and schematic updated together under a new revision. The manufacturer marks the revision on the first article and removes the previous files from the active package to avoid mixing revisions.

What file formats are preferred for PCBA NPI?

Gerber RS-274X or Gerber X2 and ODB++ are common for PCB data. IPC-2581 is accepted when available. BOM and centroid files are usually CSV or spreadsheet formats. Assembly drawings and schematics are usually PDF. The key is that the files carry a revision and match each other.