In this post, we will take a look at the PCB Assembly Procedure, types of services PCB Assembly Houses offer, what is Turn-key service in PCB Assembly and finally a list of Top 10 PCB Assembly Turnkey Service providing companies.
PCB for Everyone
If you are a professional engineer in the field of Electronics and Embedded Systems, you probably would have designed a PCB and must already be familiar with the process involved in the production of a PCB.
Even beginners, hobbyists, DIYers, electronics enthusiasts (whatever you want to call them) are also getting involved in PCBs.
With opensource software tools like KiCAD and free ones like EAGLE combined with low cost PCB manufacturing services, you will be automatically tempted to take your design or idea to the next level.
Take a look at this interesting post: “How to Make Your Own PCB at Home“.
This is where the most entry level or sometimes even the professional projects end i.e. designing a circuit, laying out the PCB and getting it manufactured. They assemble the PCB with necessary components themselves.
It is fine if you design is small (and not complex) with mainly through-hole components and hand solderable surface mount components.
But what if you have slightly complex design with components that are not suitable for hand soldering or what if the number of boards to be assembled is high or you want a professional product with industry defined standards?
Role of PCB Assembly Houses
This is where PCB Assembly Services or houses come into picture. A PCB Assembly House, as the name suggests, assembles the components on your PCB.
NOTE: The PCB Manufacturer and the PCB Assembly House may or may not be the same service provider and that is not the topic of discussion. Here, PCB Manufacturing is taken as one entity and PCB Assembly as other.
Simply speaking, a PCB Assembly Service takes your PCB, which is already manufactured, collects all the necessary components (we will talk about this later), assembles the PCB with all the components and ships you the fully assembled and ready to use boards.
This is the job of any PCB Assembly House. The main aspect of PCB Assembly is getting all the components or parts as per the design. This is where the services provided by PCB Assembly Houses can be categorized.
Parts Sourcing for PCB Assembly
Components or parts sourcing is process of how the PCB Assembly House gets the parts. Usually, there are three ways this can be done.
NOTE: The nomenclature may be different but you get the idea behind each type of part sourcing.
- Consigned (or Kitted)
- Turnkey
- Combo
In consigned part sourcing, you are responsible for procuring all the components and supplying it to the PCB Assembly House.
Turnkey (or Turn-key) PCB Assembly is a process where the PCB Assembly House itself gathers the parts for you.
A combination of consigned and Turnkey PCB Assembly is also an option where some components are supplied by you while some are sourced by the assembly house.
Advantages of PCB Assembly Turnkey Service
The term “turnkey” in general means that the customer gets a product that is ready for use as in buying a car: turning the key and starting the car.
When it comes to PCB Assembly turnkey service, the PCB Assembly House takes care of manufacturing the PCB (dependent on the PCB House), procuring the parts, assembling the PCB by picking and placing the components, soldering the components, testing the board and then shipping the finished board to the customer.
The advantages of PCB Assembly Turnkey Service are as follows.
- Reduced lead time
- Low cost
- Easy monitoring
Top 10 PCB Assembly Turnkey Service Providers
We have done a little bit of research and compiled a list of few PCB Assembly Houses which provide PCB Assembly Turnkey Service.
First, I will list out the PCB Assembly Houses with turnkey service and see about each company and its PCB Assembly capabilities one-by-one.
- PCBgogo
- PCBWay
- Bittele (7PCB)
- Advanced Circuits(4PCB)
- RауMing Tесhnоlоgу
- Elecrow
- PCBCart
- Seeed Studio
- Eurocircuits
- Maxtech Electronics
Now, let us take a quick look as the capabilities of these PCB Assembly Houses which offer turn-key service. The PCB Assembly capabilities mentioned here are in brief and doesn’t necessarily depict the complete details.
For more and detailed information, I suggest you to visit the website of a particular PCB Assembly House and browse through its complete services and capabilities.
PCBgogo
Feature | PCB Assembly Capability |
Minimum Order Quantity | 5 |
Build Time | 3-4 days for normal PCB Assembly |
PCB Specifications | Max. board size – 500mm x 400mm |
Board Type – Rigid PCB, Metal Core PCB | |
Surface Finish – Lead/Lead Free HASL/Immersion Gold | |
Assembly Types | Surface Mount |
Through-hole | |
Combo (SMT & Through-hole) | |
Parts Source | Consigned/Kitted |
Full Turnkey | |
Partial Turnkey | |
Component Types | Passive Components |
BGA 0.25mm Pitch with X-ray testing | |
Hard metric connectors | |
Cable and Wire | |
Bulk | |
SMT Parts Presentation | Cut tape |
Reel | |
Partial Reel | |
Tube | |
Tray | |
Laser-cut Stainless Steel | |
Stencils | Stencil with or without frame |
PCBWay
Feature | PCB Assembly Capability |
Lead Time | Quick turn time is 8-48 hrs. |
Parts Source | Consigned/Kitted |
Turn-key | |
Partial Turn-key/Combo | |
Assembly Options | Surface Mount (SMT), Through-hole (THT) and Mixed. Single or double-sided placement |
Solder Type | Lead and Lead free |
Stencils | Laser-cut Stainless-Steel Stencils |
Minimum Order | 5 |
Component Size | Passive Components – as small as 01005, 0201,0402. |
BGA – 0.25mm pitch with X-ray testing. | |
Fine Pitch Parts – 0.25mm fine pitch parts. | |
Component Package | Reels, Cut Tape, Tube & Tray, Loose Parts and Bulk. |
Board Dimension | Min Board Size – 50mm x 100mm |
Max Board Size – 250mm x 500mm | |
Board Shape | Rectangular, Circular and any Odd Shapes. |
Board Type | Rigid boards, Flex and rigid-flex boards. |
Bittele (7PCB)
Feature | PCB Assembly Capability |
Types of Assembly | THD (Thru-Hole Device) |
SMT (Surface-Mount Technology) | |
SMT & THD mixed | |
2 sided SMT and THD assembly | |
Order quantity | 1 to 10,000 |
Components | Passives parts – Smallest size 0201 |
Fine pitch – 8 Mils | |
BGA, µBGA, QFN, POP and Leadless chips | |
Connectors and terminals | |
Component Package | Reels |
Cut tape | |
Tube and tray | |
Loose parts and bulk | |
Board dimensions | Smallest size – 0.2″ x 0.2″ (5mm x 5mm) |
Largest size – 15″ x 20″ (380mm x 500mm) | |
Board shape | Rectangular, Round, Slots and Cut outs, Complex and Irregular |
Board type | Rigid FR-4 & Rigid-Flex boards |
Assembly process | Leaded process & Lead-Free (RoHS) |
Turnaround time | 1-5 days for only PCB assembly |
10-16 days for turnkey PCB assembly |
Advanced Circuits(4PCB)
Feature | PCB Assembly Capability |
Turn Times | Same Day – 4 Weeks |
Volume | No Minimum Order |
Parts Procurement | Turnkey |
Consigned/Kitted | |
Partial Turnkey | |
Stencils | Laser cut stainless steel |
Assembly Types | Surface Mount (SMT) |
Thru-hole | |
Mixed Technology (SMT/Thru-hole) | |
Single or double-sided placement | |
Solder Types | Leaded and Lead-free/RoHS compliant |
Component Types | Passive Components – 0402 but 0201 also possible |
Ball Grid Arrays (BGA) – 0.35mm pitch | |
Fine Pitch Components – As small as 15 mil (0.38mm) |
RауMing Tесhnоlоgу
Feature | PCB Assembly Capability |
Single and double-sided SMT/PTH | Yes |
Large parts on both sides, BGA on both sides | Yes |
Smallest Chips size | 0201 |
Min. BGA and µBGA pitch and ball counts | 0.2mm pitch, ball count greater than 1000 |
Min. Leaded parts pitch | 0.008 in. (0.2 mm) |
Max. Parts size assembly by machine | 2.2 in. x 2.2 in. x 0.6 in. |
Max. PCB size | 14.5 in. x 19.5 in. |
PCB Finish | SMOBC/HASL |
Electrolytic gold | |
Electroless gold | |
Electroless silver | |
Immersion gold | |
Immersion tin | |
OSP | |
Assembly surface mount connectors | Yes |
Elecrow
Feature | PCB Assembly Capability |
PCB Types for Assembly | FR4 Rigid Board |
Aluminium Board | |
Flexible Board | |
Rigid – Flex Board | |
Part Sourcing | Customer offers all parts |
Turn-key | |
Combo | |
Assembly Options | SMT assembly: BGA, QFN, QFP, SOIC, PLCC, PoP, 0805, 0603, 0402, 0201 |
Through hole assembly | |
Single & Double side assembly | |
Sub-assembly | |
Soldering Types | Lead free/ROHS compliant soldering only |
Hand soldering | |
Reflow soldering | |
Wave soldering | |
Minimum Order | 1 |
General lead time | 3 weeks |
PCBCart
Feature | PCB Assembly Capability |
Min. PCB Size | PCB width/length less than 30mm should be panelised |
Max. PCB Size | Single board 500mm*400mm, panel board 310mm*410mm |
PCB Types | Rigid PCBs, Flex PCBs, Rigid Flex PCBs, MCPCBs, Rogers PCBs, Ceramic PCBs |
Surface Finishes | Lead/Lead-free HASL, ENIG, Silver, OSP, Gold plated |
Component Size | SMT sizes – 01005, 0201 or large |
BGA min. pitch & Ball Count – 0.35mm & 2 – 50 | |
BGA, micro-BGA, POP, CSP, LGA package, Flip chip | |
Components Height: 0.1mm – 12mm | |
Component Presentation | Bulk, Cut Tape, Tube-Tray, Partial Reel and Full Reel |
Seeed Studio
Feature | PCB Assembly Capability |
Assembly Types | Surface Mount (SMT) |
Ball-Grid-Array (BGA) | |
Through-Hole | |
Mixed Assembly | |
PCB Types | FR4 (Rigid) Board |
Aluminium Board | |
Flexible (FPC) Board | |
Rigid-Flex Board | |
Solder Type | Lead-Free (RoHS compliant) |
Assembly Time | 8hrs to 72hrs once all parts are ready |
Component Types | BGA – 0.25mm pitch with X-ray testing |
Passive components – Min. 0402 package | |
Fine-pitch components – Min. 0.38mm pitch |
Eurocircuits
Feature | PCB Assembly Capability |
Assembly Types | SMT single or double sided |
THT single or double sided | |
SMT + THT mixed technology – single or double sided | |
Volume | Prototypes (from 1 pc) & Small series (up to 50 pcs) |
Maximum 5.000 component placements per order | |
Manufacturing Lead Time | 5, 7 or 10 Working Days |
Components | Passive components – 0402 and higher |
Active components – from 0.5mm pitch | |
BGA – above 0.5mm pitch | |
PCB or Panel Size | Min 50 x 50 mm. Max 250 x 350mm |
Component Sourcing | All components sourced by Eurocircuits. |
Components not sourceable by Eurocircuits can be supplied by the customer. |
Maxtech Electronics
Feature | PCB Assembly Capability |
PCB Quantity | 1 – 25 |
Lead Time | Rush Lead-time – 24Hrs or 3 days |
Regular Lead-time – 5 days | |
Part Sourcing | Consignment |
Turnkey build | |
Solder Type | Lead and lead-free processes |
NOTE:
- This list is based on small research by taking services provided and feedback into account. Some of you, who might already have experience with PCB Assembly Houses, can provide your review on any of the PCB Houses and services (even if they are not in the list).
- This will help other potential customers.
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