Prototype PCB Assembly

PROTOTYPE PCB ASSEMBLY

Fast, Reliable Prototype PCB Assembly Services

Prototype PCB Assembly Challenges

The key challenges of prototype PCB assembly lies in efficiency, quality and reliability.

Fast Production Response

Dedicated emergency production lines, one-stop full-process support, ready-made supply chain and DFM pre-review can greatly shorten the lead time.

Prototype PCB Assembly Manufacturing Process

Quality Control Standard

KnownPCBA strictly controls every step in accordance with the IPC-A-610 Class 2/3 standard.

Design to Delivery Connection

This can ensure seamless connection from design to delivery.

QUALITY ASSURANCE

Quality Assurance for Prototype PCB Assembly

A complete quality control system covering design verification, material inspection, manufacturing process control and final testing.

01

DFM / DFT Review

Gerber · BOM · Test Point

Conduct a manufacturability review of Gerber files, BOM, and coordinates before production. Identify risks such as pad spacing, impedance matching, and test point coverage, thereby preventing batch issues at the source.

02

Incoming Material and Process Control

IQC · SPI · AOI · X-Ray

Implement IQC to verify authenticity and solderability of components. 3D SPI monitors solder paste volume. AOI inspects placement deviation, standoff and solder bridging. X-Ray detects internal voids and solder shorting in BGA or QFN.

03

Final Inspection and Functional Verification

Flying Probe · ICT · FCT

Conduct electrical connectivity checks and functional tests including power-on, signal reading and writing, and boundary condition simulation.

04

Standard and Traceability System

IPC-A-610 · J-STD-001

Establish production data archives including oven temperature curves, inspection images and material batches for precise problem tracing.

Some Design Guide for Prototype PCB Assembly

Our KnownPCBA offers free consultant for DFM (Design for Manufacturing). And some frequently asked questions in our daily consultant will be shared as follows.

Line Width and Spacing Optimization +

In some cases, design values of line width approaches our limits, 0.1 mm. Too small width may result in broken lines or short circuits in manufacturing. For this, we advice to reserve more than 20% margin and 0.15 mm line width. Sharp-angle routing can also lead to the same problem. So we suggest angle with 45°/arc.

Pad and Board Edge Distance Deficiency +

If the pad distance from the formed edge is less than 0.5mm, there would be a high risk of pad damage. It is recommendable to keep component or through-hole distance from the board edge ≥0.75mm (recommend 1mm). Must reserve 3-5mm process clamping edge.

Resistor Bridge Design Requirement +

Pay attention to keep resistor dam with more than 0.075 mm when the pitch of components are less than 0.5 mm. Or, we can use steel mesh shrinkage process.

Via Design Requirements +

Via diameter <0.2mm or non-standard via, via ring width <0.15mm, holes in the board area not plugged, may cause drilling damage or solder loss. Countermeasures: When spacing <0.5mm, forcibly retain ≥0.075mm resistor dam, or use steel mesh shrinkage process.

Mechanical Hole and Via Ring Design +

The recommendable mechanical hole is more than 0.25mm. The via ring single side can be more than 0.15mm. Holes in the board area must be resin-plugged and electroplated with cap. This can ensure good hole drilling effect and avoid solder loss.

Fiducial Mark Design and Interference Prevention +

Set at least 3 bare copper diagonal global Mark points with above 1mm diameter. Local Mark points must be above 0.5mm away from the component.

If any other DFM problem, please feel free to contact us for free consultant.

What Factors Contribute to Our Short Lead Time for Prototype PCB Assembly?

Specialized urgent production line and flexible scheduling +

10%-15% Reserved Channel · 1-500 Pieces · 15-30 Minutes

Reserve a fast response channel of 10%-15% that is separated from the mass production lines. This supports immediate cut-in-line orders for small batches from 1 to 500 pieces. The production line changeover time can be within 15-30 minutes.

Full-process One-stop +

Layout Design · PCB Manufacturing · Procurement · SMT Assembly

Integrate Layout design, PCB manufacturing, component procurement, SMT soldering and testing assembly. This eliminates the time wastage caused by multi-supplier connections and logistics coordination. Internal collaboration can quicken the communication cycle by more than 50%.

Supply Chain Spot Inventory and Prepared Procurement Mechanism +

Thousand-level SKU Inventory · Global Purchasing · 24 Hours

A good prototype supplier often establishes a thousand-level SKU ready inventory of common resistors, capacitors, inductors and basic ICs. The mature global purchasing channels can delivery the components material within 24 hours.

Preceding Engineering Review DFM +

Manufacturability Analysis · Risk Prevention

Complete the manufacturability analysis within a few days after receiving the order. This corrects design risks such as pad spacing and packaging matching in advance. So it can prevent rework and cycle delays caused by design flaws from the source.