What is a double-sided PCB? A double-layer PCB board with copper and metalized holes on both sides is called a double-layer board. Both sides of the circuit board are covered with circuit boards. However, if you want to use wires on both sides, you should first provide appropriate circuit connections between the two sides. Nowadays, double-sided printed circuit board technology remains the mainstay of the assembly industry. New and old designs have almost unlimited applications. sales12@hitechpcb.com What materials are used to manufacture double-sided PCBs? The core material is usually a glass fiber reinforced epoxy resin laminated board (FR4 is the most common), with copper foil bonded to each side. According to the requirements of the application, other materials may include polyimide, CEM1, and CEM3. Application of double-sided PCB board Industrial control power supply Consumer electronics LED lighting car telephone system Control relay hard drive Single sided printed circuit board and double-sided printed circuit board The difference between a double-sided PCB board and a single-sided PCB board is that the single-sided PCB circuit is only located on one side of the PCB board, while the double-sided PCB circuit can be distributed on both sides of the PCB board. The wiring of the double-sided PCB board is currently being connected. In addition to the different production processes of double-sided PCB boards and single-sided PCB boards, there is an additional copper deposition process, which is the process of conducting double-sided circuits. Is double-sided PCB more expensive than single-sided PCB? Generally speaking, yes. The manufacturing process of double-sided PCBs is more complex, involving additional steps such as through-hole electroplating. Compared to single-sided PCBs, this complexity may result in higher costs. Can double-sided PCBs be used for high-frequency applications? Yes, double-sided PCBs can be used for high-frequency applications. The key lies in the accuracy of the materials and layout used for the PCB substrate. High frequency PCBs typically require materials with low dielectric loss and designs that minimize signal interference, which can be achieved through careful planning and expertise in double-sided PCB design. The advantages of double-sided PCB A double-sided PCB makes it relatively easy to add conductive paths on the board, which means you will have a PCB that is more suitable for your needs; Due to the fact that both sides of the double-sided PCB board are conductive, a large number of ICs and components can be assembled at any time; If necessary, the size of the circuit board can be reduced as double-sided PCBs can be used, which may save you money as you may only need to use one board; Double sided PCBs can be used for many different applications and electronic products, making them an ideal choice for demanding applications and advanced electronic products.

1. Double Sided PCB
sales12@hitechpcb.com
What is a double-sided PCB? A double-layer PCB board with copper and
metalized holes on both sides is called a double-layer board. Both sides of the
circuit board are covered with circuit boards. However, if you want to use
wires on both sides, you should first provide appropriate circuit connections
between the two sides. Nowadays, double-sided printed circuit board
technology remains the mainstay of the assembly industry. New and old
designs have almost unlimited applications.
sales12@hitechpcb.com
What materials are used to manufacture double-sided PCBs? The core
material is usually a glass fiber reinforced epoxy resin laminated board (FR4
is the most common), with copper foil bonded to each side. According to the
requirements of the application, other materials may include polyimide, CEM1,
and CEM3.
Application of double-sided PCB board Industrial control power supply
Consumer electronics LED lighting car telephone system Control relay hard
drive
Single sided printed circuit board and double-sided printed circuit board The
difference between a double-sided PCB board and a single-sided PCB board
is that the single-sided PCB circuit is only located on one side of the PCB
board, while the double-sided PCB circuit can be distributed on both sides of
the PCB board. The wiring of the double-sided PCB board is currently being
connected. In addition to the different production processes of double-sided
PCB boards and single-sided PCB boards, there is an additional copper
deposition process, which is the process of conducting double-sided circuits.
Is double-sided PCB more expensive than single-sided PCB? Generally
speaking, yes. The manufacturing process of double-sided PCBs is more
complex, involving additional steps such as through-hole electroplating.
Compared to single-sided PCBs, this complexity may result in higher costs.
Can double-sided PCBs be used for high-frequency applications? Yes,
double-sided PCBs can be used for high-frequency applications. The key lies
in the accuracy of the materials and layout used for the PCB substrate. High
frequency PCBs typically require materials with low dielectric loss and designs
that minimize signal interference, which can be achieved through careful
planning and expertise in double-sided PCB design.

2. The advantages of double-sided PCB A double-sided PCB makes it relatively
easy to add conductive paths on the board, which means you will have a PCB
that is more suitable for your needs; Due to the fact that both sides of the
double-sided PCB board are conductive, a large number of ICs and
components can be assembled at any time; If necessary, the size of the
circuit board can be reduced as double-sided PCBs can be used, which may
save you money as you may only need to use one board; Double sided PCBs
can be used for many different applications and electronic products, making
them an ideal choice for demanding applications and advanced electronic
products.
How to solder double-sided PCB In order to ensure the reliable conductivity of
double-sided printed circuit boards, it is necessary to first solder the
connection holes (i.e. the through-hole part of the metallization process) on
the double-sided printed circuit board with wires, and cut the protruding part of
the connection wire tip to avoid injuring the operator's hand. This is the
preparation work for wiring the circuit board.
Welding points for double-sided circuit boards: For equipment that needs to
be molded, it should be processed according to the requirements of the
process drawings; That is to say, they must be molded first and then inserted.
After molding, the model side of the diode should face upwards, and there
should be no difference in the length of the two pins. When inserting devices
with polarity requirements, be careful not to reverse their polarity. Rolling the
integrated block components, after insertion, whether it is a vertical or
horizontal device, there must be no obvious tilt.
The power of the soldering iron used for welding is between 25 and 40 watts.
The temperature of the soldering iron tip should be controlled at around 242
. If the temperature is too high, the tip is prone to "death", and if the
℃
temperature is low, the solder cannot melt. The welding time should be
controlled within 3-4 seconds. During formal welding, the operation is
generally carried out from short to high and from inside to outside according to
the welding principle of the equipment. Master the welding time. If the time is
too long, the equipment will be burned out, and the copper wire on the
copper-clad board will also be burned out.
Due to the double-sided welding, a process frame for placing the circuit board
should also be made to avoid squeezing the components below. After the
circuit board is soldered, a comprehensive inspection should be conducted to
identify areas of missing insertion and soldering. After confirming the
correctness, trim the redundant device pins on the circuit board, and then
proceed to the next process. In specific operations, relevant process
standards should be strictly followed to ensure the welding quality of the
product.

3. How to reflow double-sided PCB At present, the mainstream circuit board
assembly technology in the SMT industry should be reflow soldering. Of
course, there are other methods for soldering circuit boards. Double sided
reflow can save space on circuit boards, which means smaller products can
be achieved. Therefore, most double-sided PCB boards seen in the market
belong to the double-sided reflow process.
Due to the requirement of two reflow cycles in the double-sided reflow
process, there are some process limitations. The most common problem is
that when the PCB board enters the second reflow soldering furnace, the
parts on the first side will be affected by gravity and fall off, especially when
the board flows towards the reflow area of the furnace at high temperatures.
Below, we will explain the precautions for placing parts during double-sided
reflow soldering:
Firstly, it is recommended to place smaller parts on the first side of the reflow
oven, as the deformation of the PCB will be smaller and the accuracy of
solder paste printing will be higher when the first side is reflow soldered,
making it more suitable for placing smaller parts.
Secondly, there is no risk of smaller parts falling off during the second reflow
soldering process. Because the components on the first side are directly
placed on the bottom side of the circuit board when they impact the second
side, they will not detach from the circuit board due to excessive weight when
it enters the reflow area.
Thirdly, the parts on the first side must go through two reflow soldering
furnaces, so their temperature resistance must be able to withstand the
temperature of both reflow processes. Generally, resistors and capacitors
require at least three cycles of high temperature reflow. This is to meet the
requirement that some circuit boards may need to go through a reflow oven
again due to maintenance.