Fusion PCBA Specification

  • PCB Assembly Order Flow Chart
  • Fusion PCBA Specification
Fusion PCBA Specification
Order Quantity1-8000pcs
PCB Layers1-16 layers
PCB MaterialRigid, Aluminum, Flexible Printed Circuit


Components
Seeed OPL 
Components from Official Suppliers
1). Components allowed import into Mainland China
2). In stock and the lead time is certain
3). No big quantity requirement for purchase
Environmental standardRoHS(Lead Free)
Solder TypeManual Soldering/Wave-Soldering+Surface Mounted Technology
Board dimensionsMinimum Size: 1.0mm*1.0mm
Maximum Size: 500mm*500mm
Board ShapeVarious Shapes
PCB Design File FormatGerber File






BOM (Bill of Materials)
1. BOM file should be in csv, xls, xlsx format
2. BOM content should be as below
Part/Designator Manufacture Part Number/Seeed SKU
Quantity
A4,C2,C3 318020010 3
C1,C2,C3,C4,C5 RHA0J471MCN1GS 5
D1 ESP-WROOM-02 1

  • PCBA Design Suggestion Gerber file
1 If possible, keep all DIP components on the same side (Top/Bottom)
2 The distance between 2 solder pads of 0402 components should be 0.26-0.45mm
3 No silkscreen on VIA holes since VIA hole will cut the silkscreen
4 Mark the pole for polarity components
5 Minimum trace/vias/pads spacing (Check more details)
6 The distance between any two chip components should be at least 1mm; the distance between chip component and connector should be at least 5mm
7 Keep clear around big IC (48pins or more) and BGA. 3.8mm is recommended. The minimum BGA is 0.25mm
8 The solder pad size (length/width) on PCB should be larger than pin size of the component
9 Temperature-sensitive components (e.g. LED, battery) may be damaged in the manual soldering process
10 The distance between soldering points and neighbour SMD components should be at least 1mm
  • Gerber File
We use Gerber file as the manufacturing files, this is the article to guide you how to generate the Gerber file
  • BOM File
Components from Seeed OPL
Click to download Seeed OPL List

Components from Official Suppliers
We can not only solder components from our OPL but also can solder components from other suppliers, like Digikey, Mouser, Element14, Arrow, as long as the component meets the following requirements.
1). Components allowed import into Mainland China
2). In stock and the lead time is certain
3). No big quantity requirement for purchase

Note:
1). The MPN is 'manufacture part NO.', NOT Digikey or Mouser part NO.
2). SKU="OPL P/N" = MPN
3). Parts= Designator = location (the location of your components)
3). If one SKU have 3pcs, please use this format:  SKU:318020010  Qty:3   Parts: A4,C2,C3
4). Our system will automatically recognize the BOM file as long as you follow the BOM Template like below.
Part/Designator Manufacture Part Number/Seeed SKU
Quantity
A4,C2,C3 318020010 3
C1,C2,C3,C4,C5 RHA0J471MCN1GS 5
D1 ESP-WROOM-02 1

  • Lead time:

The lead time for PCB Assembly orders is around 15 business days if all the parts are from the Seeed's OPL and around 25 business days if not. Please see below for details.

  • PCB in production: PCB is being produced (3 - 14 business days, see note 1).
  • BOM Processing: The procurement of components and other materials (around 15 - 20 business days from order confirmation).
  • Assembly: The boards will be assembled and shipped 3 business days.
  • For Non-OPL orders: Since PCB production and components procurement take place at the same time, in most cases, the components will arrive after the PCBs have been manufactured. Therefore, the lead time for Non-OPL orders is time for components procurement and assembly/shipping time.
  • For OPL orders: Since all the components are sourced from our in-stock Open Parts Library, there is no procurement of components time. Therefore, the lead time for OPL orders is the PCB production time and the assembly/shipping time.

  • Note:
    1. Lead time is defined as the time from order confirmation and dispatch to the customer.
    2. PCB production takes 3 - 14 business days depending on specific order parameters, not including delays caused by problems with the order/files, but typical boards are completed within 3 to 5 days.
    3. We strongly advise customers to place orders well in advance of deadlines in case of any delays caused by problems with the order/files.

    • Designator
    The designator on the PCB should be complete. Without the designator, we are not able to know the locations of the components precisely. Please put the Component Placement File as PDF with the Gerber file in ZIP/RAR and re-upload it if there is no designator on the board.

    The designators in uploaded BOM comply with the ones in Gerber or in Component Placement File

    The designator silkscreen should not be covered by solder pad.

    • Package

    The component package in uploaded BOM complies with the pads in Gerber file.

    • Polarity

    The polar components have polarity marks on the board.

    • Quantity
    The components' quantities in uploaded BOM comply with the quantities of designators.

    Notice: Please examine the files before place an order if needed, we can't change the Gerber file once the Gerber file submits to production.

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