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Interposer board: high performance intermediate device in PCB


Interposer board is a switching product using PCB board as the connection test. Its function is to use it for various tests or to change the existing structure (length&width). It can be widely used in LCD, vehicle mounted TV, industrial control medical equipment, etc.In the following article, we will introduce the information about Interposer board in detail.

What is interposer in PCB?

An interposer PCB is a type of PCB used in manufacturing electronic devices such as mobile phones, computers, etc. These PCBs are used to connect different parts. They are usually placed under the main PCB to make it easier to manufacture.
What-is-interposer-in-PCBInterposer PCBs are used because they allow manufacturers to quickly assemble complex circuits without having to design each component separately. For example, you could take a smartphone and replace the display with another one. You don’t have to redesign the entire phone; just change out the display module.

What is the function of interposer board?

The interposer board is used for connecting two or more boards. It has many functions like providing electrical connections between the two boards, shielding them from electromagnetic interference (EMI), and protecting them from mechanical damage.
What-is-the-function-of-interposer-boardAlso, it provides many functions such as
● Isolation of the board from the ICs
● Provides mechanical support for the components on the board
● Allows the use of different types of PCB connectors (e.g., DIP, JEDEC)
● Provides signal routing to the ICs

Additionally, interposer boards can be used to create new types of products that were not possible before. For example, if you wanted to put a microprocessor on top of a motherboard, you would need to use an interposer. The interposer would provide all the necessary connections between the two components.

Where is interposer board used?

Like any other PCB, the interposer board has different applications in diverse industries. However, Interposer boards are mainly used in the following industries:

● Electronics industry
● Automotive industry
● Medical Industry
● Aerospace industry
● Telecommunications industry
Where-is-interposer-board-usedFurthermore, the interposer board is also used in the following ways:

● In an ESDI (Electrostatic Discharge Immunity) circuit.
● In a power supply that has built-in protection against electrostatic discharge.
● On a motherboard with integrated capacitors.
● For example, on a motherboard with integrated capacitance filters.

What is interposer board made of?

Interposers can be made using a variety of materials and methods, but they all have some common characteristics. Interposers are typically made of copper-clad laminate (CCL), epoxy resin, glass fiber-reinforced polyester (GFPRP), or other materials. The CCL material is usually placed over the top layer of the PCB, then drilled and plated through holes using a laser machine. Once the interposer has been formed, it is attached to the bottom side of the PCB.

Furthermore, the interposer can be manufactured using either manual processes or automated processes. Manual processes include PCB drilling, plating, laminating, and etching. Automated processes include drilling, platinizing, laminating, etching, and pick and place.

How does an interposer work?

An interposer works by using through-hole vias. Through-hole vias are holes that go completely through the board. A via is a hole that connects two layers of material. Vias are used to connect two layers of material, which allows signals to pass between those layers.
How-does-an-interposer-workThere are three types of vias: blind vias buried vias, and plated vias. Blind vias are vias that do not extend above the surface of the board. Buried vias are vias where the bottom of the via is covered by the same layer of material as the rest of the board. Plated vias are vias with a conductive coating on the inside of the hole.

What’s the material of interposer board?

Several types of materials are employed when creating an interposer board. These materials include

1. Copper Clad Laminate (CCL)

Copper-clad laminate is one of the most commonly used materials for making interposers. This type of material is made up of multiple layers of copper foil bonded together with an adhesive. The copper cladding provides the strength and rigidity needed for the interposer.

2. Epoxy Resin

Another common material for making interposers is epoxy resin. Epoxy resin is a polymer compound used for making composite materials such as fiberglass insulation boards, castings, and structural adhesives. Epoxies are widely used in construction industries, automotive, electronics, aerospace, and marine applications.

3. Glass Fiber-Reinforced polyester (GFPRP)

GFPRP is a new kind of plastic that has been used for decades in manufacturing aircraft parts and other high-strength applications. However, GFPRP is much stronger and lighter than conventional plastics like nylon and Kevlar. The strength of GFPRP comes from the glass fibers embedded in the polymer matrix. This means that the material can withstand higher loads and deformations than ordinary plastics.

Other materials include Polypropylene Polyester TPU (thermoplastic polyurethane) and Silicone.

How to design interposer board?

The process of designing an interposer board is fairly easy. First, you need to decide what kind of connections you want between the two circuits. Then, you need to determine how much current each circuit needs. Finally, you need to choose a layout that makes sense based on these requirements.

Additionally, if your design uses any special features such as surface mount technology (SMT), then you will need to consider those in your design.

What is the difference between interposer and substrate in PCB?

Interposers and substrates are two types of materials used for making printed circuit boards (PCBs). The term “interposer” refers to the layer of material placed between the copper layers of the board, while “substrate” means the base material from which the PCB is made.
difference-between-interposer-and-substrate-in-PCBAn Interposer is used for adding components onto a printed circuit board. A Substrate is used for making a Printed Circuit Board (PCB). The substrate is made from copper laminate and other materials which are then etched to create the circuit pattern. The interposer is placed between the top surface of the PCB and the component. The interposer contains traces for signal routing, ground planes, power planes, etc. A Substrate is just a layer of insulation.

What is the difference between a silicon interposer and organic interposer?

A silicon interposer is a thin piece of silicon that sits between two chips, while an organic interposer is a layer of organic semiconductor material that connects two chips. Silicon interposers allow for greater density and lower power consumption, which makes them ideal for mobile devices. Organic interposers provide higher bandwidth, allowing for faster data transfers between chips, which is useful for high-performance computing applications such as gaming consoles.


We hope that this article was helpful! More information about PCBA, PCB, electronic components and devices, and all about electronic manufacturing, please visit post on IBE website.If you are looking for a one-stop PCBA manufacturer, feel free to contact IBE.

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