FAQ

The cost of PCBA which include the PCB unit cost, pcb probeflying test or E-test, tooling, laser cut steel stencil, and labor. In case of Turn-key or partial Turn-key PCBA, the cost of parts (BOM) will be added.  

1) Quality of products

2) Quality of service

3) The reputation of the manufacturer

4) Comments from past customers on the manufacturer

5) Turnaround Time: Check how quickly they can deliver your assembled boards.

6) Cost-Effectiveness: Compare the cost of assembly with the quality of service provided.

The production of prototype PCB assembly mainly includes the following process steps.

1) The manufacturing of the PCB

2) Purchasing and inspection of components

3) The SMT processing

4) DIP plug-in processing

5) Cleaning

6) Testing of the PCBA

RichFullJoy offer both prototype SMT assembly and prototype PTH assembly.

Low volume printed circuit board assembly means small batch PCB assembly; the order number usually varies from 1 piece to 100 pieces is regarded as low-volume PCB assembly.

Reduce development cost ，Shorten time to market, Quality approval to keep a good reputation, Reduce production cost.

Of course, we can provide low volume PCB assembly with SMT and THT mixed technology.

Yes, we can provide low-cost & low-volume PCB manufacturing and assembly services.

We will offer high-quality PCB assemblies at the most competitive price for you.

Such a solution is reflected in RichFullJoy’s low-volume PCB assembly capabilities.

SMT assembly, PTH assembly, SMT & PTH mixed

Single-sided components, double-sided components,press fit assembly

PCB type: rigid, flex, and rigid-flex PCB

Consigned and partially consigned assembly

In PCB assembly, there are several common issues that can affect the quality and functionality of the final product. Here are some of the key issues to watch out for:

Common issues include:

1.Poor Soldering Quality: This includes cold solder joints, solder bridges, and insufficient solder, which can lead to weak connections and potential failures.

2.Incorrect Component Placement: Components placed in the wrong orientation or at the wrong location can cause the circuit to malfunction.

3.Component Damage: During assembly, components can be damaged due to excessive heat or poor handling, leading to failures.

4.Solder Mask Defects: Issues with the solder mask, such as lifting or cracking, can expose the copper and lead to short circuits.

5.Pad or Trace Damage: Damage to the PCB pads or traces can occur during assembly, which can cause electrical issues.

6.Contamination: Foreign materials, such as flux residue or dust, can cause electrical problems or corrosion over time.

7.ESD (Electrostatic Discharge) Damage: Static electricity can damage sensitive components if proper ESD protection measures are not in place during assembly.

8.Incorrect Component Values: Using components with the wrong specifications can cause the circuit to not function as intended.

9.Testing: Lack of thorough testing can result in boards that do not meet specifications.

Generally speaking, flex circuit assembly is more complex than regular rigid PCB assembly; since the flexible circuit boards are bendable, it is difficult to run through the SMT pick & place machine. But  RichFullJoy is a flex PCB assembly manufacturer with more than 20years of experience. We can assemble 1-10 layer flex PCBs, multi-layer flexible PCBs, heavy copper flex circuit boards, and rigid-flex printed circuit boards. Please contact us any time for a free flex PCB assembly quote or flex PCB quote.

As one of the best flex PCB assembly suppliers in China,  RichFullJoy supplies many kinds of flexible PCB assembly, such as 1-10 layer flex PCB, heavy copper flex circuit boards, multi-layer flexible PCBs, rigid-flex PCB, and prototype flex circuits.

RichFullJoy has more than 20 years of experience as a flex circuits manufacturer; here are our thoughts: 1) flex PCB designs should work well; 2) a trusted flex PCB supplier with experienced engineering, production, purchasing and quality team is extremely important. If you have such demands, please contact us for a free flex PCB assembly quote.

The following are the main processes: 1) flexible PCB manufacturing; 2) flex PCB assembly services, which include flex PCB SMT assembly services and flex PCB PTH assembly services; 3) Quality inspection such as AOI inspection, ICT testing,X-Ray,visual inspection and functional test. 

Yes. This practice is called partial Turn-key. You can supply some parts, and we source the rest of the parts on your behalf. We will ask for your approval for anything that is not sure at our side. In case parts crossing or substitution is needed, we will again ask for your final approval.

Yes, We have the ability to handle BGA of 0.25mm pitch with X-ray testing. For BGAs, there are two designs with via on pad and via near pad connected by shorter trace. We need to tent and fill any vias near pad of the BGAs with solder mask to ensure the soldering quality. But for vias on pad, we need to fill via with resin to make sure good soldering quality.

Excessive parts do exist because we will ask for some percentage of overage for consigned/kitted orders, or we will buy more for the same purpose for those Turn-key orders. You can either ask us to ship back to you these unused parts together with the loaded boards, or keep them in our shelf for your next order. All up to you.

Due to the complexity of how to determine the turn time of PCBA services, our policy is that turn-time begins immediately after all the parts and PCBs are ready and all the PCB files (Gerber files/other PCB files, etc.,) , Centroid (Pick & Place PNP file, or XY Data or files in other formats), BOM, and all other necessary data or documents/images/photos are complete for our assembly work.

Yes. But we also offer leaded PCBA services.

Defects and problems may occur from time to time, as PCBA is a complex work which involves many details. If you find any defects or problems, please let us know immediately, and we will evaluate and review the problems, and we will make a decision of how to remedy. We will either repair/rework or remake your boards. In case we need the defective boards, we may ask you to send them back to us. We guarantee a functional board in your hand!

IPC-A-610 Class

A motherboard is a printed circuit assembly (PCA) used exclusively in laptop or desktop computers. 

While some may refer to a PCA as a motherboard, only those found in computers are motherboards. All other printed circuit assemblies are simply PCA or PCBA.

The primary function of a PCB assembly is to integrate the electronic components of a device into a compact or defined space. Acting as the central hub of the electronic circuit of a device, the PCB provides insulation for all other electrical components, allowing them to be safely connected to a power source.

Yes, we do X-ray inspection for all BGAs and fine pitch leadless components.

1) Visual Inspection

2) AOI Inspection

3) X-Ray inspection (for BGA’s and fine pitch parts)

4) Functional testing (if required by customer)

Yes, we do perform IC programming and functional testing.

For IC programming, we would require the hex file.

For functional testing, we would need the test procedure and the necessary hardware.

Yes, we offer final box-build assembly services.

We suggest that you provide us with the following information:

Bill of materials (BOM)

Schematics 

Assembly drawing(s)

Wiring diagrams 

Test specifications

Sample device

Our MOQ is 1 piece, however, we prefer to build at least 2 pieces for testing.

Yes, we do have new promotions every week, please contact one of our sales representative at mkt-2@rich-pcb.com

PCB assembly process consist of adding solder paste to the board, picking and placing components, soldering, inspection and testing. The whole assembly process need to be monitored to ensure highest quality of the products are produced. (PCB prototype assemblies are early samples of products built with the sole purpose of testing design ideas to see if they work)

The Bill of Materials, commonly known as a 'BOM', is a list of all the needed parts for the manufacturing process. This list generally includes designator, descriptions, manufacturing part numbers, footprint, and required quantities.

As mentioned above, PCBA testing helps to make sure the electronic circuit board assembly works well. These include in-circuit testing, functional testing, reliability testing, AOI inspection, X-ray, and visual inspections.

We mainly focus on high-quality PCBA services of "multi-variety, small and medium batches, and short delivery time'