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The Importance Of Multi-layer Board

As the development of electronic technology, multi-layer PCBs has been widely applied for all kinds of electronics products to satisfy the more complicated requirement in function.

 

Multilayer PCB Applications

 

So where is it used, the answer is anywhere, for example?

Consumer Electronics, Aerospace, Automotive, Military and Defense, Computer Electronics, Telecommunications, Industrial, Medical Devices are perfect applications for multilayer PCBs.

 

 

 

What Are The Advantages Of Using Multi-Layer PCB

 

There are numerous advantages to utilizing multilayer PCBs, The most obvious of which is the size of the PCB. Because of their design, multilayer PCBs are inherently smaller than traditional PCBs.

Multilayer PCBs generally provide better quality than normal PCBs

This multilayer PCBs invaluable for small electronics.

 

What Are The Disadvantages Of Using Multi-Layer PCB

 

Such as high cost, long production cycle, high requirement of the testing method. such issues as crosstalk and impedance problems.

 

 

 

Multilayer PCB Manufacturing Process

 

Producing PCB is a complex process of many steps. This overview covers the most important steps When producing a multilayer PCB.

Pre Production Engineering-Material issue-Inner layer-Inner layer etch-Inner layer AOI-Lamination-Drilling-Plated Through Hole-Panel plating-Pattern plate-plating-Outer layer etch-Outer layer AOI -Via hole plugging-Solder mask-legend Printing-Surface finish-Profile- Electrical Test-Final inspection-Packaging

 

 

 

How To Reduce The Cost Of Multilayer Boards

 

With the cost down of electronic equipment, everyone wants cheaper and cheaper prices.

Before designing, you can consider the following design specifications to reduce your cost.

It is more economical to manufacture a circuit board with even layers rather than an odd number of layers.

If your design permits it, consider building a PCB with fewer layers.

Vias that are blind or buried will end up costing more.

Round through-holes, as compared to slotted or square ones reduce the overall cost and time.

Relaxed tolerances cost less compared to tight tolerances.

The lower the width and spacing of conductors, the higher the cost.

The overall PCB costs can be reduced drastically by manufacturing them in bulk quantities.

Ensure that the PCB layout is in perfect condition in the designing stage. A wrong design will ruin the PCB and increase your costs. 

 

PCBASTORE for Multilayer PCBA Manufacturing

 

PCBASTORE Services has a wealth of expertise in the manufacture, and supply of multi-layer PCBs. If you require multilayer PCB manufacturing or assembly, please leave a reply here.  sales07@pcbastore.com or contact us and we will do our best to assist you!

 

 

Circuit Board PCB Assembly Manufacturing Process

Electronics has been applied to every aspect of our lives, we all know circuit board PCB is the core of those electronics, but, do you know how it's made, and functionally applied for your electronics devices? or how to perform the process of PCB Assembly Manufacturing?

 

The Process Of PCB Assembly Manufacturing

 

1)Solder Paste Printing By Stainless-steel Stencil

 

Firstly we need to use stainless-steel Stencil to print solder paste on the pads of PCB boards. solder paste is only applied for those parts which need to be mounted, That's what Stainless-steel stencil is used for.

 

 

2) SMD Mounting Process

 

After printing solder paste on the boards, we'll need to set up the data and programme of SMT machine as per pick&place files, which ensures those SMD components are mounted exactly where they are automatically.

Traditionally, this process was executed by manual, in which assemblers had to pick and place components by hand.it has really low efficiency with too many mistakes by workers.

 

 

3) Reflow Oven Process

 

Reflow Oven is for solidifying all SMD components on the board, those boards come

with conveyor belt after pick and place process, during going through Reflow Oven, solder paste will be melted and cooled, which will solidify all SMD components on the pads, that's how SMD components are mounted on the boards

 

 

4) Initial Inspection&Through-Hole Soldering

 

After finishing the mounting of SMD components, boards need to be inspected by workers to ensure there's no missing and bad soldering of SMD parts,then, there's still PTH parts remained to solder.the process of PTH parts soldering are often done by manual,which needs professional and experienced workers to do in case there are pins of components which are not soldered and connected electrically, as well as the issue of orientation.

 

 

5) Final Inspection

 

After all SMD and PTH parts soldered in the right way, the final inspection would be the most important way to have good control of quality and ensure the quality of products.

Three ways to inspect: Visual inspection by manual, AOI(Automated Optical Inspection), X-ray...

 

How Much Does PCB Prototype Cost?

Many engineers or product managers would like to know the PCB prototype cost before their innovative idea turn into reality,

Which help them optimize version and estimate the manufacturing cost.

 

There’s no point in developing a product if it cannot be manufactured and sold at a profit.

 

To estimate the cost of a PCB prototype is the beginning!

 

For PCB manufacturer, PCB prototype cost can be broken into two parts: the engineering cost to check and analysis the files. the second part is the actual total cost.

 

The second part total cost includes the cost to fabricate the PCB, the cost of assembly, electronic components cost, testing cost, and the freight.

 

Engineering cost

 

Engineering costs vary greatly depending on the PCB design and complexity, engineering specialty, the more complicated, takes longer and thus cost more.

 

For a simple design, some manufacturers do not charge this cost, just consider it to be PCB fabrication cost.

 

PCB fabrication cost

 

In China, the cost to produce a few bare boards usually runs at $30. it assumes the basic process. if you want a super small board, more layers and special design, most costly processes have to be used.

 

Most boards at least have two routing layers (top and bottom), however, most designs will require from 4 to 6 layers. More complex designs may require 8 layers or more.

 

The boards with few layers are cheaper than those of with more layers.The special designs will require complex PCB technologies, such as blind and/or buried vias also drastically increase the board cost. Their use will typically double the PCB prototype cost, so in most cases, it is best to use only standard through-hole vias.

 

PCB Assembly Costs

 

The cost to assemble the PCB (i.e. solder down all the electronic components) is primarily determined by the total number of components, the minimum pin pitch, the use of lead-less packages such as QFN or BGA, and whether components are soldered on both sides of the PCB.

 

For a couple of boards with 30-50 different components, the cost is approximately $ 100-$180.

 

 

Electronic Components cost

 

In addition to the board production and assembly costs, there is the cost for the electronic components.the component is one most factor to determine the function of the product.

 

For some functional components such as IC, modules, it is suggestedchoose the original brand.for other normal parts like a resistor or connector, the manufacturer will advance you to use a cheaper alternative with the same values or specification.

 

Test Costs

 

This test is optional. 

This test is different from the inspection in the PCB assembly. it is an additional test to ensure the quality of prototype samples.

Once prototype PCB has been assembled it needs to be tested to confirm it is fully functional and meets all of the quality specifications.

Usually, the manufacturer will require the testing method.

 

For some package such as BGA, it is better to do X-ray test, to avoid poor soldering or short circuit.

 

Freight cost

 

Most products will ultimately be manufactured in Asia or China Shenzhen.

For small quantity of PCB prototype samples, the freight is usually $30.

the manufacturer like PCBA store will arrange the shipment by a reliable courier. you will have the PCB prototype fast and safe.

 

Summary

 

Keep in mind that all of the PCB prototype costs will reduce significantly as the production volume increases. Even going from 2 units to 20 units has a huge impact on the unit price.

 

What costs you a thousand dollars for a single prototype may only cost a couple of dollars once you purchase much higher volumes.

Do you have any PCB prototype samples we can help with?

If so thencontact usto discuss your requirements now. 

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