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There are many integrated circuit chips in the mobile phone for BGA integrated circuit pin identification, mainly including CPU FLASH, power chip, intermediate frequency chip, power amplifier and so on. According to the structural design, their packaging methods are also different. There are two main packaging methods in mobile phones:

The circuit is covered with a solder mask on the PCB to prevent short circuits and damage to the device. The so-called solder mask opening is to remove the paint layer on the circuit so that the circuit can be exposed to tin.

The golden finger here is to open, and there is a very common function to insert and open the opening, that is, to increase the thickness of the copper foil in the later stage, which is convenient for overcurrent, which is in the power supply board and the motor control board.

Openings and bright copper in PCB design

In PCB design, many standard rules need to be followed to ensure the quality of the PCB.

1. 3W rule
In order to reduce crosstalk between lines, it should be ensured that the line spacing is large enough, when the line center spacing is not less than 3 times the line width, 70% of the electric fields can be kept from interfering with each other, called the 3W rule, when using a spacing of 10W, 98% of the electric fields can be reached without interfering with each other.

There are many integrated circuit chips in the mobile phone for BGA integrated circuit pin identification, mainly including CPU FLASH, power chip, intermediate frequency chip, power amplifier and so on. According to the structural design, their packaging methods are also different. There are two main packaging methods in mobile phones:

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Basic Parameter
FSC-DB690 is a BLE Module Testing Board USB Port. It's a development board designed for FSC-BT690 | Ultra Small Size BLE 5.1 Module Ultra Low Power

Comparing with the bluetooth module itself, FSC-DB690 is much more convenient & easy for users to do testing. With the USB Port, the module can be connected to the computer directly, time saving, and ensuring the stability. Working with Feasycom's FREE UART tool, users can have the full control of the FSC-BT690 by using AT Commands.

Below you would find more features of the module FSC-BT690.

Basic Parameter

Bluetooth Beacon
FSC-BP103B
Bluetooth version
BLE 5.1
Chipset
Dialog DA14531
Size
37.8mm x 33.8mm x 7.9 mm
Max number of broadcast
10 slots
TX power(Maximum)
+2.5dBm
Broadcast range
Up to 160m
Battery
CR2032
Battery Life
2.5 year by default setting(Broadcast interval: 1300ms, TX power:0dBm)
Colors
White, green, black, rose carmine
Operating temperature
-20°C to +60°C
Protection

Integration design for smd soldering station and hot air rework station to keep whole unit compact, durable and attractive.
LED screen used to display working temperatures and working states which is set by buttons make operations easy.
Low-voltage supplied iron heater to protect sensitive electronic component effectively.
Intelligence cooling system and deferred power-off function to extend hot air gun and heater inside lifespan.
Auto-sleep function to save energy.
Intelligent malfunction detection and indications.