Smart Mobile Phone Device PCB Board Detailed Introduction

Smart Mobile Phone Device PCB Board

PCBs can now be found in a variety of electronic devices, such as computers, televisions, digital cameras, and smart mobile phone. The cell phone circuit board is considered to be, for all intents and purposes, the brain area of the phone. It runs the entire system. There are several components of the circuit board that works together to ensure the proper functioning of the cell phone.

Role of Printed Circuit Boards in the Evolution of Cell Phones

Over the years, technology has given the world significant advances in communication. From the first mobile cellular phone in the 1970s to the latest smartphones available on the market today, researchers and engineers are constantly developing new ways to make our phones smaller, faster and more efficient. Due to the increase in capabilities of printed circuit boards, PCBs have gotten smaller in size and more powerful. This lets manufacturers put more components in a smaller amount of space to deliver all of the features we have come to expect, such as touch screens, Wi-Fi connections and cameras. As we move toward the future, consumer electronics PCB are changing the way our mobile phones, tablets and even vehicles interact with the world around us.

Smart Phone PCB Requirement

Based on functions and development trends of future smartphones, highly multi-layer printed circuit boards should be applied as motherboards and low multi-layer PCBs as complementary daughter boards. When it comes to the fabrication of motherboards, 10-layer build-up multilayer (BUM) PCBs are usually selected. Owing to function integration led by semiconductor packaging (SiP), it’s extremely likely that layer count will maintain unchanged or even reduced. Since the year 2015 witnessed the application of 64-bit processors and IC pin spacing has been shrunk from 0.4mm to 0.35mm, the layer count of the motherboard will possibly increase to 12 layers or more for the time being.

The technological design of PCB is so important that it plays a key role in manufacturing PCBs effectively with low cost. A new generation of surface mount technology (SMT) requires that designers have to take manufacturing issues into consideration from the beginning due to its complexity since a little modification of design files will definitely lead to delayed production time and increased development cost. Even a change of pad position requires rerouting and solder paste stencil remanufacturing. Therefore, designers must pay full attention to technological issues from the beginning. One simple rule: the earlier technological issues are solved, the more beneficial it’ll be for manufacturers.

How Do Cell Phone Circuit Boards Work?

Cell Phone Circuit Boards

Computer Chips

Cell phone circuit boards consist of a few computer chips. There are both digital-to-analog and analog-to-digital conversion computer chips within the circuit board. They convert audio signals going out from analog to digital, and then they convert the audio signals from digital back into analog. The circuit board’s digital signal processor, which is generally rated as having 40 MIPS (millions of instructions per second) functions to conduct calculations of signal manipulation in a very speedy manner. It deals with both compression and decompression of the signals.

Flash Memory and ROM Chips

The flash memory and ROM components of the cell phone circuit board serve as a storage location for the phone. They store the customizable options of the cell phone, as well as the entire operating system. The power and radio frequency sections of the circuit board work on the phone recharging as well as its management of power. It also controls several hundred FM channels, as well. The RF amplifiers focus on signals that go in and out of the phone’s antennae.


The microprocessor is in charge of dealing with all the tasks that are to be performed by the cell phone’s display area and keyboard. It also focuses on the phone’s control signals (to and from the base station) and command options. It helps to interconnect all of the keyboard’s main functions.

Why are Multi-Layer PCBs Commonly Used?

Mobile Phone Device Multi-Layer PCBs

Both single-layer and multi-layer printed circuit boards are commonly used for various applications. Single-layer PCBs are used for more simple devices with essential functions, whereas a multi-layer PCB can be used for more complex devices with more functionality. PCB manufacturers have seen an increased demand in multilayer boards due to the need for smaller intricate devices for various industries and sectors.

Multi-layer PCBs are often used in various professional electronics such as computers, mobile phones, heart monitors and much more. Multi-layer PCB fabrication consists of laminating more than two conductive layers together and there can be various amounts of layers, depending on the application requirement. Having more layers inside the circuit board allows more circuitry and wiring for more complex applications. For example, mobile phone printed circuit boards can have as many as 12 layers as they are very complex devices.

Due to the versatility of multi-layer PCBs, it is used widely in many devices, including automotive, consumer electronics, aerospace and many more. There are many benefits of using these printed circuit boards.

Contact Unitepcb for Multilayer PCB Manufacturing

Unitepcb has a wealth of expertise in the design, manufacture, and supply of multi-layer PCBs. Our experience and experts allow you to get the best ever circuit boards at cost effective price.

A PCB for a mobile phone from Unitepcb suits a variety of parts and components. The state of the art equipment and technology in our manufacturing facilities in Shenzhen China produce PCBs that are not only reliable but bring our clients value for the long term. This is because our operations are ISO9001 and TS16949 certified. We deliver nothing but the best PCB technology and are a leading PCB manufacturer for both prototypes as well as production.