JLCPCB Assembly guide for Ultimate users

21 Jan, 2022

By ren

The world is evolving at a breakneck speed regarding current technology, and consequences are straightforwardly seen in everyday lives. Our way of natural life has drastically changed. The following technical growth has delivered to the globe various advanced equipment that we could not have imagined even ten years ago.

What is JLC PCB?

JLCPCB is a prominent PCB prototype company and a high-tech manufacturer focusing in rapid PCB prototypes and small-batch PCB production worldwide. JLC PCB has over 800000 clients and has been in the PCB manufacturing business for over 14 years. JLCPCB is a reputable PCB manufacturer with an extensive production capacity, excellent manufacturing and production facilities, and high PCB quality.

JLC PCB Manufacturing

JLC PCB can create PCB of varying levels of complexity. They produce both inexpensive and straightforward single-layer PCB for amateurs and enthusiasts and complicated multilayer PCB for high industrial applications. JLC collaborates with significant product manufacturers, and it's possible that the PCB of items you use (that is easy to use pcb), such as laptops or cell phones, was manufactured at this facility.

Manufacturing Process


Clean and cut raw materials, such as copper-covered boards, to the proper size. They are then sent to the next machine for edge processing after being chopped into pieces.


Drilling the PCB is the next step. Yes. Before being processed further, the PCB is first pierced. Hundreds of very accurate automated devices will drill holes in the board. These machines can also adjust the drill bit diameter based on the size of the hole in the PCB Layout.


Another layer of copper is put over the boards in this step of Industrial PCB Manufacturing. It is the step where the holes' main metallization is generated, which is critical for the creation.

Photo Resistance

A thick coating of photoresist is applied to the board at this step. Following that, a photomask with the layout is applied over the board. The PCB layout is printed on photomasks, which are translucent sheets. It is then subjected to UV light once the alignment has been verified.


UV light is used to expose the boards here. When these boars are exposed to UV light, the photoresist in the portions not covered by photomask polymerizes. After that, any remaining photoresist on the PCB has washed away.


Following cleaning, the board system is baked for mechanical robustness. The slight coating of Tin-Lead Alloy is placed on the first layer, boosting the hole's dependability. They're also put on copper rails where the photoresist had previously been removed.


PCB etching is the chemical removal of copper that hasn't been protected. The conveyor conveys and the exposed copper is etched away using etching solutions jets. The Lead coating is removed in a similar chemical method after etching.

Quality Assurance

There will be some residues of undesirable lead or copper on the board. The Quality Control Center will correct all of this. Mistakes will be repaired automatically or manually under microscopic testing if any faults or errors are discovered.


Masking is applied to the board to prevent corrosion. The board is given an industrial look through masking. Any color is used for masking. The organization provides a broad array of hues, including blue, red, and black, to mention a few.

Printing using silkscreen

It is similar to how a solder mask is applied. These are cleaned, heated, and cooled once again to obtain high performance PCB.

Surface Preparation

The bare surface of copper (where we solder the components) is gold or tin-plated at this stage. It will keep the copper from rusting for many years. All of the previous procedures are carried out on large sheets.

PCB Testing

Automated equipment is utilized to test the board's connections one by one. They use probes to test each node at breakneck speed. They double-check all connections and compare them to the original Gerber File.

Components of JLC PCB

JLC PCB is a rigid body that contains numerous electrical components. It is generally green in color. The apparatuses are stuck onto the PCB in a "PCB Assembly" procedure or PCBA. Pcb is designed by a Fiber Glass Substrate, apparatus Components, and Copper Layer that generates Traces, hovels in which the components are embedded, and coatings that are present inner in inner or outer coatings/ layers. The outer layers are present on both single-sided and double-sided PCBs, but there is no interior layer.

A solder mask isolates the PCB substrate and components, and epoxy resin holds them together. As with PCB colors, the Solder Mask is Red, Blue, or Green. Thanks to the solder mask, the components will prevent short-circuiting with tracks or other components.

PCB Copper Traces

The copper traces on the PCB are utilized to transport electrical impulses from one location to another. These signals might be discrete analog signals or high-speed digital signals. The Trace material is condensed to pass Power and Electricity. That's why it Powers up the components.

Most PCBs have a distinct plane of ground connection designed to deliver high voltage or current. "Vias" connects the electrical components on the top layer to the inner GND plane or the internal signals layer.

PCB Functionality and Smt Assembly

If the smt assembly and smt orders resistor is not correctly placed or a slight trace is reserved in Pcb, the PCB may not operate. As a result, the components must be installed appropriately. When parts are integrated on a PCB, it is referred to as PCBA or Assembled PCB. Based on the criteria provided by the customer or user, PCB functionality might be sophisticated or basic. PCB sizes vary as well, depending on the needs. Here the most crucial part is smt assembly.

Modern electronics gadgets are built on PCBs. They support and link electronic components physically and electronically. The boards are composed of a laminate material, such as fiberglass or composite epoxy, and have conductive pathways that connect the various elements of the board. According to the predetermined PCB design (use PCB design tool), these paths are printed or engraved into the board.

Why are PCBs costly?

If you choose double-sided assembly, your PCB smt assembly quotation will be more costly.

It necessitates replicating the whole component placement procedure on both sides of the circuit board. It also necessitates additional smt assembly machine programming, solder stencil creation, and other tasks contributing to the PCB smt assembly cost. If you choose the lead-free smt assembly option, the price may go up.

Fiberglass, composite epoxy, or another laminate material is commonly used as a PCB substrate. Copper is frequently used as the conducting material on one or both sides of the board.

PCB Fabrication Designing

PCB design and pcb fabrication are becoming more accessible these days. The ability to manufacture 5-10 circuit boards for a pittance has allowed millions of enthusiasts the freedom to experiment for experience including personalized advertising and browsing experience including personalized with their ideas.

When designing a circuit board, there are several elements that a designer should be aware of. In this post, we'll look at a few key components of designing and ordering a PCB, as well as how JLCPCB fared in those areas.

PCB manufacturers have a set of design guidelines that the designer must follow. The manufacturing machine will reject the design if the designer does not follow the guidelines. As a result, most PCB manufacturing businesses publish a set of design standards, including words unfamiliar to newcomers.

Types Based on Layers

It has the following types, based on number of layers.

A single-layer PCB is a circuit board with copper on one side but none on another. Components are typically mounted on the side of the panel where no copper is deposited, and the copper side is mainly used for wiring and soldering.

A double-layer PCB is a circuit board containing copper on both sides, referred to as the Top Layer on one side and the Bottom Layer on the other. The component surface is on the top layer, while the soldering surface is on the bottom.

A circuit board with numerous working layers is known as a multilayer PCB. It has countless intermediate layers in addition to the top and bottom levels. The conductor layers are the middle layer projects.


We are grateful to JLCPCB for funding initiatives. JLCPCB is a complete PCB prototype and production firm, ensuring the most incredible service you've ever had in this area (Price & Time). You can take the advantage of the product using this free website (use cookie policy/use cookies to offer/ consent to the cookies/ cookies we use), using this service website you consent offer you a better pcb service.

Using this website, you can stay connect with us, make free live chat with us and select your shipping destination and free shipping destination currency price too. There is a better browsing experience including Gerber files with PCBs assembled in 24, network sites assembled in the republic of south k, rep of north Somalia, Somaliland rep of north, Turks and Caicos islands, d.p.r of north k, congo the democratic republic, Korea republic of the south, Sao tome and Principe.


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